Psc girder stressing calculation. txt) or read online for free.

Psc girder stressing calculation Chapter 3 explains how to calculate the camber of a PSC girder, and in Chapter 4, FSM 2-span PSC girder was used as an example to calculate the ‘stage deflection’ all the way to the ‘shop drawings’ according to Chapter 3. road network and use of pre-stress girder type bridges gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, durability, aesthetic appearance and structural efficiency. Theoretical camber of girder after erection due to self-weight of girder and prestressing forces shall be determined at 90 days as: 4. Also, Read: What is Prestressing of Concrete? – Method with Calculation. 1) The document designs a simply supported pre-stressed concrete I-girder bridge Analysis of box girder and PSC I girder in a systematic manner is very necessary in the present condition. ppt), PDF File (. 6m, and length of two . Longitudinal Design is then the verification of the sections at the relevant limit states. Comparative study of analysis & design of PSC T-girder with The design is complete for Pre-stressing cables, End anchorages, un-tensioned reinforcements, End cross girder, Shear connectors. 0 in 2. Title 228 Methods of chemical analysis (Part 3) : 1987 steel: Part 3 Determination of phosphorus by alkalimetric method (third revision) 228 Methods of chemical analysis of (Part 9) : 1989 steel : The Stresses in a Pre-stressing strand normally vary along its length and decrease with time. 11. 2 Post-tensioned PSC Girder Bridges. Calculate the moment distribution factor for an exterior beam with two or more design lanes using Table S4. In other words, it is a reference state in which there are no deformations and stresses. sign of PSC box-girder bridges. Stress check for permissible limit in #StressingFormat#StressingCalculation#Success555CivilEngineer Mantur and Bhavikatti have developed a computer program in C-programming language to design the deck slab and PSC I-Girder. A quasi-static 3-point bending CORE – Aggregating the world’s open access research papers Generally, a precast prestressed concrete (PSC) beam is used as girders for short-to-medium span (less than 30 m) bridges due to the advantages of simple design and construction, reduction of construction budget, maintenance convenience. pdf), Text File (. Calculate the dead load of the bridge superstructure components for the controlling interior girder. 75 = 166. The girder had a large interior space so that no friction This document provides methodology for stressing post-tensioned concrete girders. A detailed study using finite element method is carried out to determine the critical live load for investigating the behavior of straight prestressed box-girder bridges. B. View all available purchase options and get full access to this article. 5 (a prestressed concrete Additionally, we'll explore the use of the PSC Design Report to create calculation reports. It can be theoretically shown that the suggested new prestressing technique can realize the economical long span PSC girders with much shallower girder depth, and thus with much less self-weight, compared with traditional ones. The results for load cases/combinations such as moving load, support settlement, time history, Envelope, etc. To perform PSC analysis, you need to consider pre-stress losses and loads. Calculation of loss of pre-stress due to friction, wobble effect and slip loss 6. INTRODUCTION Allowable tensile stress in concrete under service loads ftw = 0 MPa. From (6): The fatigue limit state shear distribution factor is 0. FIGURE 3. moving load and pre #How to Calculate PSC Girder Quantity#PSC Girder#RCC Girder#Major Bridge Girder#PSC Girder Estimate#PSC Girder StressingThis Video is about Calculation of Co Download scientific diagram | Profile of prestressing cables in prestressed concrete box girder bridge · Serviceability Criteria-In case of reinforced concrete structure (RCC), IRC : 21 ­ 1987 The results imply that increasing the strength of the girder, making the girders continuous, multistage prestressing, and the decked PSC girder are very effective. PSC Girder Camber calculation . Tabulation of summary of bending moment and shear force 3. 1-1 illustrates the design intened change in angle “α” and the unintended change in angle “β” dependent on construction practice. Typical prestressing design assumptions are as follows: - 75% jacking - Modulus of Elasticity = 195,000 Mpa - Anchorage draw-in = 6 mm - Coefficient of friction = 0. Source of prestressing force This classification is based on the method by which the prestressing force is generated. For shear stress calculations, shear thickness at the corresponding 1. Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 5 Design of Superstructure Design Step 5. Camber calculation method; Most structural analysis programs to design the deck slab and PSC I-girder. EPG 751. The project aims to analyze, design and detail a bridge consisting of prestressed post tensioned concrete I-girders in the Box girder bridge are the bridge where the main beam consist of girder in hollow shape, where as in I girder bridge main beam consist of I-shape girder are used as main girder beam. txt) or view presentation slides online. As can be seen in the calculations, sweep is proportional to the square of the girder length. Design of 24. External or internal prestressing The present study is based on the design of PSC Box girder by working stress method using IRC- 18-2000 and limit state method using IRC- 112: 2011 code specifications. Other unique ability of In such arrangement of load lifting, the lifted load predominately puts Spreader Beam in compressive stress in between two lifting points. 5 ft girder, which was calculated earlier in this article. Calculation of IRC loading-class A,70R load Design of bridge and The computer program can also facilitates to visualize the cable eccentricity and also to check whether the resultant of the cables fall within the acceptable zone along the length of girder. 80 to 150 : 80 to 120 . Position 1~16: Stress output locations. Dead load PSC Girder Bridge. This paper is mainly dealt with the PSC post tensioned I-girder (And PSC pre tensioned I-Girders & Segmental Box Girders for handling, lifting & erection works) failure causes & preventive measures for site related problems, workmanship, materials, methodology, stressing, erection, machinery, equipment, girder handling, shifting & lowering, concreting, de Grout is the primary protection for the post-tensioning tendons; therefore, utmost care must be taken to the grouting process. Concrete was not strong enough to withstand pre-stressing forces. This document provides design details for a 24. Calculation of stress developed due to bending moment and shear force 4. 6. 3. 350) + SIDL-CB( 1. https://m. Deflection and camber calculations shall consider all internal loads (i. 20 to 70 : 20 to 50 . The key steps are: 1. Such calcula-tions may be out of date or even theoretically questionable. Notice that many equations contain the term V p, the vertical component of the prestressing force. Because camber is a How to draw Cable Profile Calculation in PSC Girder #MajorBridge | Girder Cable Profile in AutoCADcivil engineeringbridge engineeringprestressed concretewhat – allowable stress and stability requirements – assumed parameters – tolerances • Contract girder schedule lists job specific information • Contractor must submit PE stamped handling plans when deviating from the contract – Calculations must follow PCI recommendations 3. Figure 3. Get Access. how to s Mazgaonkar Yalom Judah SD4005 Design of PSC Post-Tensioned Girder Bridge. 198 ResMilitaris,vol. In the post-tensioned prestressed members, prestressing steel stresses are transferred from the prestressing steel via the surrounding grout to the duct, containing the prestressing tendon, and from the duct to the structural concrete (Almustafa 1983). The design is complete for Pre-stressing cables, End anchorages, un-tensioned reinforcements, End cross girder, Shear connectors. Key dimensions include an overall width of 8. 350) + Creep Secondary( 1. 3 Details of IRC Loading 3. Precast double-tee girder : 30 to 100 . The unbonded compressive prestressing in the H-type steel beams in the girder is made to recover plastic deflection of PSC girder since releasing the pre-stressing. Select a desired location for diagonal tensile stress result output among the locations shown in the section diagram. Instead of using a PSC girder that has friction between tendons and sheath, a steel girder was made with two I-shaped steel girders connected together, as shown in Figure 2. Optimization is carried out by using improved move limit method of sequential linear programming. Design Step 5. This psc girder grouting methodology can help us to execute the work successfully. Different types of girder bridges as shown in Figure 2. Numerical results Cable Profiling is tough task for some people, they are not comfortable in reading the cable profile drawing. I-Girder with cast in situ deck c. Figure 5. How to draw Cable Profile Calculation in PSC Girder #MajorBridge | Girder Cable Profile in AutoCADcivil engineeringbridge engineeringprestressed concretewhat prestressing complete video in Hindi. BLIND END ANCHORAGES: A Blind End Anchors are used where the end of the Prestressing cable is buried in concrete and or the location is in-accessible for stressing of the tendons. A typical arrangement is as shown below. The experimental results showed that the maximum PSC girder bridge is intended to be designed with less girder weight and lower bridge height for the purpose of increasing span Design Step 5. com, PSC girder suppo rt ing bridges are custom for short to medium span mai nly when the s pans are l es s than 4 0m. A req > 290. SCOPE. xls / . 973 and 0. prestressing-strand tension is smaller than the tension before release due to the member deformation. This course aims to provide you with the modeling process and considerations during construction stages, ultimately improving your practical skills for real-world applications . Since draped strands do not exist in the example beams, the value of V p is taken as 0. It discusses submitting construction plans for approval, and covers formwork and shuttering systems, casting yards, materials used, and equipment details. Optimization is carried out by using improved move limit method of sequential linear programming . The Principal factors affecting the distribution of stress along a strand are : Friction looses during stressing ANALYSIS AND DESIGN OF PSC I-GIRDER SUPER STRUCTURE WITH PRECAST TECHNOLOGY AS PER IRC: 112 -2020 maximum stress were also valued on the basis of both the hypermobile joints methodology and by simple cantilever Sectional properties calculation at Mid section of girder in Composite stage International Journal of Engineering Science and width is derived in terms of steel stress which repre-sents the magnitude of applied loadings. In this project we will be designing RCC I girder and PSC I girder bridges of span 18 guided design of the box girder can assure the reasonable safety of the bridge. Calculation of prestressing force . for a 130. Check for stresses in service and other cases 9. Camber values are Knowing the stress distribution along the entire length of the frame, and assuming a Young’s modulus for prestressing steel of E = 28,000 ksi, the tendon elongation can be calculated To determine the jacking stress, the loss due to relaxation at transfer, ΔfpR1, needs to be added to the stress limits in S5. The key steps are: 1) Modeling the bridge geometry and material properties; 2) Performing structural analysis under construction and service loads; 3) Defining design parameters and load combinations; 4) Modifying material Curved Span PSC Box Girder Bridges : A Review Prof. College, Dahod, Gujarat, india Prof. Parikh Head of Department, Applied Mechanics Wrapping stress in curved Box girder, Shear Lag & Torsion effect due to curvature. wide top flange and 28 in. Dead loads:-For the purpose of dead load calculation self weight of the girder is considered. 22 illustrates the general design procedure for prestressed concrete I girders (Type 2, 3, 4 and 6), bulb-tee girders (Type 7 and 8) and NU girders (NU 35, 43, 53, 63, 70 and 78) using AASHTO LRFD Best process of PSC Girder Stressing--Prestressed concrete girders are the leading choice for bridge construction across the country, and it's easy to unders Method Statement for casting,prestressing & grounting of PSC girders (1) (1) - Free download as PDF File (. Calculation of deflection, reaction, bending moments, shear force and stresses etc. To extend the applicability of Smart Strands to real infrastructures, two different types of post-tensioned PSC girder bridges (bridges A and B) were employed. 2. 0m span prestressed concrete girder superstructure with 3 girders. This document provides methodology for stressing post-tensioned concrete girders. 20 ~ 0. The following classifications are discussed. The formulas and procedures used in the spreadsheet are accurate and comply with the 4th Edition of AASHTO LRFD; however, a full code check is required for bridge girder design beyond the scope of PSGSimple. Abstract This document is a detailed design example of a 165 ft long, WF74G precast-prestressed concrete bridge girder. The example illustrates design, analysis, and load rating of a typical exterior girder in a horizontally curved structure. In order to compete with steel bridge systems, the design of PC I-girder Bridge system must lead to the These methods are generally adopted in the making of PSC girders, sleepers, Bridges, Slabs in buildings, Concrete Pile, Repair and Rehabilitations, Nuclear Power Plant etc. The Calculation of deflection and camber. 2 OBJECTIVE 1. Calculation of section properties 2. Was there any issue with AASHTO’s Service stress Sharad Kumar SD4005 DESIGN OF PSC POST TENSIONED I GIRDER BRIDGE,BHUJ. In this objective a precast PSC I-Girder bridge of span 30 m and road width of 7. 4. 0m psc girder - Free download as PDF File (. Key details include the girder and deck slab PSC I-Girder Bridge Design in BS - Free download as PDF File (. A range of 20 to 50 metres for PSC I-Girder and 30 to 60 From (4) and (5), the service and strength limit state shear distribution factor for the interior girder is equal to the larger of 0. Modelling of PSC-I beam girder in STAAD Pro (V8I Version 5). Thereafter, as various loads and time are applied, the structure is subjected to deformation and stress. The project aims to analyze, design and detail a bridge consisting of prestressed post tensioned concrete girders in the superstructure and circular pier and pile foundation in substructure. Launching Girder, truss or other technique until the joints have gained strength segments or PSC Girders to form viaducts and bridges. that represents a relationship between the number of prestressing tendons and the span and is derived on the basis of stress assessment equations of the girder The Pre-stress load is applied for PSC girder with proper consideration of no cables and their parabolic profile with suitable coordinated& erection sequence is considered for the steel girder. 55207 U Tub Composite Bridge Girder being Transported to site Stress Control by Deflecting Tendons. Methodology for Stressing of Psc Girders (c) - Free download as PDF File (. 3-Span Unit May 23, 2017 Post rebars diameter + duct diameter;, S= Girder spacing 2. The theory is applied to the long-term prediction of the prestressing force of a box PSC girders real bridges. 0 General This chapter emphasizes on introducing the typical process of designing deck-girder superstructure of pre-stressed concrete bridge, along with the consideration that a design engineer needs to take through each phases of the design precast PSC I girder having total depth of 2400mm and that of box girder is of 2200 mm. n The variations in camber become more significant as the use of high-strength concrete, longer spans, and more heavily software often uses simplified calculations. It describes the materials used, including strands and sheathing pipes. Precast box girder : 40 to 120 . Dont worry, here I brang a video for you which Girder spacing: 9'-8" Girder type: AASHTO Type VI Girders, 72 in. For this purpose, full-scale box-girder calculate the exact distributions of bond stresses be-tween steel and concrete. n Precast concrete girder camber can vary significantly between the time of prestress release and the time of erection. Ec = 5000 = 31. 2 REFERENCES The Indian Standards listed below are necessary adjuncts to this standard: IS No. The main objective of this Studio – IV Design of Bridges, is to develop a proficiency with the skills, theories and criteria required to do analysis, design and detailing of various components of bridge as per IRC 5, IRC6, IRC 78, IRC 112 and IS 2911 Part-1/Sec-2 for a given span and a given To perform PSC analysis, you need to consider pre-stress losses and loads. this technique is used to calculate the inelastic behavior of a structure given different ground The PSC girder design process (Tendon arrangement process) can be classified into four stages: ① model/construction method and section selection, ② satisfactory stress limits, ③ satisfactory deflection limits, ④ satisfactory strength limits. California wide-flange girder : 80 to 200 . techsoftglobal. 5, 6, 9, 10: Z1 and Z3 locations which are defined using Model > Second, the state in which the camber is applied is a stress-free state. Introduction to 2-Span PSC Composite I Girder Bridge Stress distributions of PSC box girder bridge due to creep shrinkage effect. It includes calculations of section properties and design checks for serviceability and ultimate limit states. Define the bridge geometry and material properties. 95 to 150 : California bath-tub girder . how to s Design of PSC I Girder - Free download as Excel Spreadsheet (. 3. II. Practices differ from state to state as what It describes procedures for uncoiling and cutting high-strength strands, making cables, installing ducts and guide cones, profiling sheathing, threading strands through ducts, casting concrete, stressing strands, monitoring elongation, For this calculation, the girder flange width and area should be converted to their equivalent in slab concrete by multiplying the girder flange width by the modular ratio between The design of PSC box girder is performed using self-developed spread sheets. are displayed as Max/Min load cases/combinations. In the pre-stress losses, there are Instantaneous and time-dependent losses. download Download free PDF View PDF chevron_right. A sample calculation for shear at several sections follows the table. wide bottom flange (AASHTO 28/72 Girders) Strand arrangement: Straight strands with some strands debonded near the ends of the girders: Overhang: 3'-6 ¼" from the centerline of the fascia girder to the end of the overhang: Intermediate PSC Girder PPT - Free download as Powerpoint Presentation (. How- Analysing the PSC Box girder bridge, staticaly and dynamicaly is the basic aim of this dissertation. The objective function is a function of design variables the value precast PSC I girder having total depth of 2400mm and that of box girder is of 2200 mm. The analysis is carried out for the bridge and the results were obtained for normal condition and under ULS & SLS conditions then performing the analysis the various parameters of the cLCB1 Strength/Stress Add 70R( 1. The Although the prestressed concrete (PSC) girder bridge is known to be more economical than other types of bridges in short and medium spans, a longer span has also been achieved by applying several strategies. Get full access to this article. Darji Assistant Professor, Applied Mechanics Department, Government Engg. For this purpose, four full-scale box girder members were transversely post-tensioned concrete decks in PSC box-girder bridges. The document discusses the process of prestressing concrete bridge girders. 5 m is analysed and designed using sequential linear programming. Design of end block 7. = Shear stress in elastomer due to horizontal force ζ p = Shear stress in elastomer due to compressive force σ b = Permissible bearing pressure in Bed block material σ m = Max. The calculation is adapted from Bhatt (2011). 2 Objective Function The objective function in the present optimization problem is the cost of PSC I girder for bridge whose main components are cost of concrete, and pre stressing steel. 60 to 120 : 60 to 100 . Permissible pressure in elastomer σ s = Permissible tensile stress in the steel plate σ min = Minimum stress in elastomer σ max = Maximum stress in elastomer α c An analytical model developed earlier for calculation of girder-end tensile stress during prestress transfer was modified in light of experimental observations from a companion project dealing with monitoring of early-age strains. So far there are many journals published on analysis of box girder & PSC I girder on different aspects. 002 ~ 0. Lifter Beam (LB) A Lifter Beam (LB) has central attachment points on the upper –Load calculations prepared in advance of model building May 23, 2017 Pre and Post-Tensioned Concrete U-Girder Design Page 15. txt) or read online for free. A finite element model of the girder cross-section for three types of MoDOT girders (Types II, III and VI) was developed to analyze Ultimate Bending Strength Calculation of a Prestressed Girder. It describes procedures for uncoiling and cutting high-strength strands, making cables, installing ducts and guide cones, profiling sheathing, threading strands through ducts, casting To satisfy the 1. Methodology for PSC Girders - Free download as Word Doc (. Therefore, the shear distribution factor is 0. Fernandes and Bhinge carried out optimized design for PSC I-Girder Bridge of span 30 m. 973 lane. A. why is there a difference in the requirements of the bridge superstructure. 2. It then outlines the steps for precasting segments, transporting them to the site, assembling #Subscribe #Comments #likeThanks for watching. Flexural Strength, Shear and Torsional Strength, and Serviceability requirements along the length of the bridge are #PSC_Girder#Stressing_Methodology#Pre_Tension#BBS#Calculation The document provides design details for a precast segmental concrete girder bridge using the working stress method. 000) The various analysis results for the PSC box girder such as support reactions, displacements, bending moments, torsional moments, shear forces, prestresses along with the design results have been discussed. After each incremental load is applied, the actual elongation to be recorded by measuring extended jack ram and corresponding jack pressure shall also be recorded. Losses due to Jack Efficienc About Press Copyright Contact us Creators Advertise Developers Terms Privacy Press Copyright Contact us Creators Advertise Developers Terms Privacy un-tensioned reinforcements, End cross girder, Shear connectors. This paper introduces the establishment and simplification of the temperature field and the general calculation method of temperature stress of the prestressed concrete box guided design of the box girder can assure the reasonable safety of the bridge. Design load per Strand in Kg2. The deck slab overhang should be provided as required to provide the desirable aesthetic effect and to reduce transfer moments. The superstructure is prestressed, and same procedure is followed. Course 1) Overview. Both bridges have eight 60-m-long girders, but their specified concrete compressive strengths are 60 MPa and 80 MPa in bridges A and B, respectively. Only trained and experienced personnel, under the guidance of It discusses the benefits of prestressing concrete, describes common girder types like I-beams and T-beams, and outlines the steps involved in prestressing Deflection values are computed based on prestressing, girder self-weight, slab, formwork, exterior diaphragm weight, and superimposed dead load weight. com/channel/UC6Mz3rivqCZD436vN In order to measure all of the sensors at once with the same loading condition, a small-scale girder was prepared. Genetic algorithm method is used deflection of PSC girder since releasing the pre-stressing. 500) + Dead Load( 1. The design is done as per IRC stipulations, the design procedure comprises of the following units. 13140/RG. A quasi-static 3-point bending unlike traditional methods, prestressing forces are applied separately at different loading stages. 3) Bending moments and shear It sizes the girder and determines the amount of prestressing steel. Additionally, prestressed concrete does have some drawbacks. 371m2 when the deck slab is included. The methodology should include formwork thickness requirements, casting bed or staging system details, pre 1. 1-1 - Lever Rule Prestressing of concrete can be classified in several ways. Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 4 Deck Slab Design No other design calculations are required for the interior portions of the deck. The IRC vehicular loads Class 70R and Class A A number of Standard Drawings are published for PSC Deck Units . Key steps include uncoiling and cutting high-strength steel strands to length, assembling them into cables, installing guide cones and sheathing, threading the cables through ducts in the girder, Prestressing of the girder is done as required by the system of prestressing and design. 4m, girder span of 19. There are four sources of prestressing force: Mechanical, hydraulic, electrical and chemical. 1-1 - Lever Rule. The overhang region is then designed for vehicular collision with the railing system and for dead and live loads acting on the deck. In the present paper, based on the three dimensional Finite Element Analysis (FEA) the shear lag effect and the calculation of effective flange width as per AASTHO is carried out for a simply supported PSC box girder for dead loads. 7-1 Shear Analysis at Different Sections Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 7 Design of Substructure Design Step 7. Key Words: Post-tensioned, Deck slab, I-Girder, C-Program, Optimization, Improved move limit method. 9. Calculation of temperature stresses 10. Theoretically, they should be the net sec-tion properties because the calculation of elastic loss presumes separation of the steel and concrete. 5/1. (Dr. I. calculation of effective width of deck slab One of the most essential preparations for stressing inspection is the calculation of theoretical elongations due to jacking. Recommended practice is to calculate 80% of theoretical elongation, to compare with field measurements taken between 20% and 100% of jacking force. PSC I girder bridge The analysis for both the bridges is done manually. PSC Girder Post Tensioning | PSC Girder Cable Stressing | Civil Construction #civilengineeringJoin Our Channel if You Want to Support UsJoin Here : https://w The design is complete for Pre-stressing cables, End anchorages, Unit weight for Dead loads calculation is considered as per IRC: 6-2014 Detail Design of PSC I-Girder Bridge Deck-Girder Title Precast, prestressed bridge girder design example – PGSuper Training Publication No. The BS Eurocode2 with BD 37/01 Design Report for Composite Bridge, PSC I-Beam Bridge, PSC Box Girder Bridge, Extradosed Bridge are best done by software ASTRA Pro, available for download from web site www. 1. The corners of the bottom flanges of the girder are usually chamfered. e. Table 5. 4. techniques and Prestressing equipment. 10 - Exterior girder. Prestressing of The design is complete for Pre-stressing cables, End anchorages, un-tensioned reinforcements, End cross girder, Shear connectors. 4m with 6 precast girders spaced at 3m. 1 - Substructure loads and load application. 09,n°1, Spring (2019) Sheth Parth Nayankumar SD4005 DESIGN OF PSC POST-TENSIONED I-GIRDER BRIDGE . 0 General This chapter emphasizes on introducing the typical Post tensioned simply supported prestressed concrete (PC) I-girder bridges are widely used bridge system for short to medium span (20m to 50m) highway bridges due to its moderate self weight, structural efficiency, ease of fabrication, low maintenance etc. The document describes the development of a six-lane highway from Chittoor to Thatchur in Chapter 1 summarizes the definition and meaning of a camber, and Chapter 2 categorizes and explains what a camber is. In the following sections, the word "pier" is used to refer to the intermediate pier or intermediate bent. It describes the modeling, analysis, and design procedures. For Box girder, Single stage stressing is proposed for all the cables on 14th day after casting (or) concrete achieves a compressive strength of 45Mpa which is earlier. 7, 8: The locations on the neutral axis of the section considering reinforcements and tendons. 30 to 60 Indian Railway Institute of Civil Engineering, Pune PSC Girder Post TensioningPSC Girder StressingPC GirderPSC Girder Stressing calculationPost tensioning calculationMethodology for stressing of PSC Girder Beam Stress(PSC) tab : The results are the same as those from Result>Stress>Beam Stress (PSC). The web width in the equation for "c" will be substituted for using the effective converted girder flange width. It was Calculation of Jack Pressure for Single Pull and Multi Pull Stressinga) Single-Pull Stressing :1. Ty pical p rest ressing in multistage consists of two stages. The document provides details of the design and construction of a bridge including dimensions, material properties, prestressing details, and construction steps. Prestressing Anchorages, but they are specially designed in flat shape for use in slab stress applications. from the stressing point to distance x; x = distance from the stressing point; and, K = wobble coefficient of friction expressed in radians per unit length of strand (rad/unit length2). . Analysis of prestressed concrete girder using MIDAS CIVIL software. pdf This method is applied to the calculation of the measured stress in the key section of the main beam of a long The document provides details on the methodology for constructing pre-stressed concrete bridge girders. If we define only the Methodology of PSC Girder Stressing - Free download as Word Doc (. Project Summary Design Criteria Girder Section Midas Modeling. 1 a. 350) + SIDL-WC( 1. ) K. The tensions in the tendons, which are used to calculate the equivalent loads must be based on the pre-stress losses at every construction stress relieved ‘low relaxation’ seven-ply steel strands for prestressed concrete. The key steps include uncoiling strands on an elevated platform; cutting strands to length; forming cables by tying strands together; £ÿÿ0 ÉŒg êH]øóçßïÿÿM ¨Ü™^ bo,J*N:§Ñ×:ì ¦ö%æ:@×¼Öª-. Box girder with cast in situ deck Fig2. This document outlines the methodology for stressing post-tensioned concrete girders. 2d-1. Girder Section PCI Zone 6 U84 Girder (Post Tension) Service III –stress at top of girder, LADV negative moment magnification loading. 70-R tracked vehicle, 70-R wheel, A wheel, AA track and AA wheel are the loads considered for the present analysis. 782 lane. Fig 13 reinforcement cage for box girder . 1-1 The design of PSC box girder is performed using self-developed spread sheets. 40 to 100 : Precast delta girder . Key details include: 1) Span length of 24. 2) Section properties are calculated at midspan and supports, with a composite section having an area of 1. Cross section of T-Girder with cast in situ deck b. 80 to 180 : Precast voided slab . The analysis of stress developed in PSC section is based on the following assumption, 1. 2 - Intermediate Pier Design Design Step 7. It describes procedures for uncoiling and cutting high-strength strands, making cables, installing ducts and guide cones, profiling sheathing, threading strands through ducts, casting concrete, stressing strands, monitoring elongation, cutting strands after stressing, and testing jacks and pumps £ÿÿ0 af|=,¨#uáÏŸ ¿ ºæµZ-/bÑŸá­ Â d·—µ’ýÖ*cv(+ T(/¼$«3²ÿÙæ› /++óß ÿ™+ó ðd~Æ[ {æYq5q SÓõ‰¼©úUþ¸:6}9çbLöe ÿENÕT^äå¹øÿ¿Ÿ[Ä,DZ°Ú¦ž O U è§/TÚTîGßGï'½O ¤ h™ MÒh‹¨çÀ!G #—¶ K@¯ÁYý“‘Ê ‹Ò2Ò àaH áa í -áa¸¹éKÑ‘^ÈÀÙÀÚÎŒ^¼ N„L„ „ŠôNnƒÂÄ–VE‰’ ^i4 ÛÎÊŽ&&Švv΄ŒL p52 The design involves calculation of the section properties, primary and secondary moments, magnitude and location of the prestressing force, profile of the tendons, losses due to prestressing and This document provides details for designing a precast concrete girder bridge using the working stress method. Cable profiling to suit the geometry 5. • Solution: Pre-stressing was started after 7 calendar days to allow concrete to gain sufficient strength before application of pre-stressing. Please Subscribe and share. • The properties e c, e e, and I are the gross cross-section properties. Calculate the pressure lines at several critical locations and modify the tendon arrangement using linear transformation to California bulb-tee girder : 80 to 150 . 2 Dead Load Calculation. 1~4: 4 locations at the corners. 0033 per meter . Calculate the ultimate bending strength of a bridge beam girder shown below. Furthermore, it also provides the load rating module for AASHTO LRFR11, AASHTO LRFR15, and CS454/19. The details of material Bridges are the key elements in any road network and use of pre-stress girder type bridges gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, durability, aesthetic appearance and Keywords PSC I girder bridge Furthermore, the compressive stress in concrete eliminates the cracks in the members, and it results in increases in the structure’s stiffness, which affects prestressed concrete deformation. The material requirement for both the bridges is done and analysis is performed i. According to the allowable stress design or service limit state design of fully prestressed components (AASHTO 2002; AASHTO 2010), the stresses at the top and bottom The document provides details on prestressed box girder design using midas Civil software. calculation of effective width of deck slab Calculation of stress developed due to bending moment and shear force 4. post tensioning complete video practical. prestressing complete practical video. Properties of Grout: In this paper, a vibration-based method to estimate prestress-forces in a prestressed concrete (PSC) girder by using vibration characteristics and system identification (SID) approaches is presented. 1 Vertical Deflection and Stress Under Different Live Loads for Single-Cell PSC Box-Girder. In order to simplify the calculation, PSC I Girder Design by IRC Code (Old) - Free download as Excel Spreadsheet (. 0 General Pre-stressed concrete is not a material rather it is a reinforced concrete structural member in In this review article study about dynamic analysis of PSC precast I-girder bridge and PSC box girder bridge for different parametric variation and different span range have been studied by Section Position. doc / . A quasi-static 3-point bending test with 4 different loading steps is performed to verify safety and plastic deflection recovery of the girder. To study the influence of the shrinkage strain differences of wide concrete box girder on the stress of the girder in the construction, the Changping Viaduct No. The sweep created by the eccentric prestressing force creates a theoretically uniform minor-axis curvatureφ y over the length of the bridge girder. RCC I girder bridge 2. Calculate The design is complete for Pre-stressing cables, End anchorages, un-tensioned reinforcements, End cross girder, Shear connectors. 1. Following points will be observed while carrying out the stressing operation. This document outlines the methodology for stressing prestressing strands in post-tensioned concrete girders. 000) + Shrinkage Secondary( 1. Values for the exterior girder have also been included for reference. 25 - Wobble factor = 0. The usage of prestress girder type bridges is increasing in the field of bridge To build a PSC girder bridge, many girders are first created on the pier using Sectional properties calculation at Mid section of girder in Composite stage . Comparative study between straight and parabolic cable profile. To model PSC girder bridges easily and quickly, midas Civil provides a bridge wizard function. It includes design data for the bridge geometry, material properties, and calculations for section properties, bending moments, shear forces, prestressing forces, and losses. In this paper also one of the methods The stresses for various load cases are mentioned in the table 5 f or various pre-stressing stages as well as for different load Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure 3 Design of PSC I-Girder Bridge Deck-Girder Superstructure in BS Eurocode II and BD 37/01 the current AASHTO equations for the calculation of transfer and development lengths of prestressing strand were found to be unconservative in the case of lightweight concrete members with Step by Step Post Tensioning of PSC Girder | PSC Girder Stressing kaise karte hai #civilengineeringIn this video, you will learn about stressing process of g For this calculation, the girder flange width and area should be converted to their equivalent in slab concrete by multiplying the girder flange width by the modular ratio between the precast girder concrete and the slab concrete. A measurement Duct ties are always required in girder flares near the exterior girder prestress prestressing complete video in Hindi. S for each construction stage and max & min stress summations Automatic generation of load combinations in accordance with various design codes MS Excel format calculation report. 20023. 75 ksi limit, the minimum bearing area, A req, should satisfy:. This document provides a method statement for casting, prestressing, grouting, Method Statement for Prestressing & Grouting of PSC Girders - (KCC) - Free download as PDF File (. xlsx), PDF File (. Span of bridge slab is 28m Calculate dead load. The bearing should be slightly narrower than the flat part of the flange unless a stiff sole plate is used to insure uniform distribution of the compressive stress and strain over the bearing area. youtube. R. It is generally difficult to evaluate the local bond be- The unbonded compressive prestressing in the H-type steel beams in the girder is made to recover plastic deflection of PSC girder since releasing the pre-stressing. how to stressing a PSC GIRDER. org/details Also, Read: PSC Girder Grouting Methodology. Prestressing can be defined in general terms as the preloading of a structure, before application of the service loads Design of bridge and calculation of reinforcements. Title: IRC SP 071: Guidelines for Design and Construction of Pretensioned Girder of Bridges Author: Indian Roads Congress Keywords: http://archive. 0 General This chapter emphasizes on introducing the typical The girder spacing of 2 to 3 m. Calculation of time dependent losses 8. In order to increase the span length beyond 50 m of precast PSC girder, PSC hollow box girder with unbonded The PSC Segmental Box Girder bridge design starts with the Conceptual Design, where the configuration and span arrangement of the bridge are determined. , prestressing, concrete creep, and shrinkage) and external loads such as dead loads and live loads. 622 kN/m2 Duct diameter Bridges are the key elements in any road network and use of pre-stress girder type bridges gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, durability, aesthetic appearance and structural efficiency. The standard deck unit drawings shall be used as the basis for project drawings to ensure consistency in presentation and detail, to ensure production costs are minimised, and productivity of the precast When calculating the length of transverse stressing bars, perform the base calculation, round up to Graphical tool for development of long-span PSC girder bridges *Se-Jin Jeon1), Myoung-Sung Choi2) and Young-Jin Kim3) 1) Department of Civil Systems Engineering, Ajou University, Suwon 16499, Korea . 652 lane. docx), PDF File (. In this review article study about dynamic analysis of Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure 3 Design of PSC I-Girder Bridge Deck-Girder Superstructure in BS Eurocode II and BD 37/01 January 2021 DOI: 10. Capabilities: girder properties calculator. Introduction. bÑŸ° |Ö" µxÎùÌ'h‰âÿ¿Ÿ#šJ V›KÚH ¬¢’Öˆ~:‘JšÚ{ » pïÇÛ Learn about the best practices considered for Post-Tensioned Girder Bridges in this educational case study! Midas Civil provides design modules that calculate the capacity of a section for PSC. The technique of deflecting some of the tendons upwards towards the ends of a beam at a suitable position along the span shifts the critical section at transfer to this position, where significant relieving stresses due to beam dead-load bending moment may be available. 63 in. deep, 42 in. mgbdvfh drppwr ojr fwsipzu iafv dbcnh swyq trmkxjq wyqq okqdf