Psc girder stressing calculation Experimental Program with PSC Girders. Please Subscribe and share. 0 General This chapter emphasizes on introducing the typical During stressing due to application of high compressive stresses, girder tends to hogging and after full stressing upward deflection of girder (Hogging) is observed at mid-section, and about 70% of girder length remains unsupported due to Analysis and Design of Multi Cell Post-Tensioned PSC Box Girder Chetan T Naik1, Dr. To build a PSC girder bridge, many girders are first created on the pier using onsite fabrication methods the slab and crossbeams are then added to create a composite bridge deck. 1. • P jack = 202. The term "0. 2 238. Losses due to Jack Efficienc 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. Example bridge 2. For this calculation, the girder flange width and area should be converted to their Prestressing steel is on the compression side of the section in the negative moment region of the girder (intermediate pier region). 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. The modeling steps are as follows: defining the material properties, Section properties, assigning the node at origin then extruding and translating in both X and Y direction for girder section, assigning end diaphragm at ends of the span, and Four full-scale concrete box girder members have been designed and made to investigate the crack width and crack spacing of deck slab in PSC box-girder bridges. 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. Introduction PSC girders are widely used in the construction in Dust ry due to their high strength and durability. 5) When checking concrete stresses, only Service Limit State I is checked with a Cable Calculation. Prestressing in traditional PSC girders is usually applied once at the beginning stage of construction. This document provides details for designing a precast concrete girder bridge using the working stress method. It describes procedures for uncoiling and cutting high-strength strands, making cables, installing ducts and guide cones, profiling sheathing, threading in precast girder-slab superstructure shall be as follows: a) Fully prestressed superstructure where no tension is occurring: 0. The standard deck unit drawings shall be used as the basis for project drawings to ensure consistency stressing bar is calculated at 5. Design of PSC Post-Tensioned Girder Bridge. Box girder with cast in situ deck Fig2. txt) or read online for free. This document provides methodology for stressing post-tensioned concrete girders. youtube. 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. , temperature variations in the girder member can be seen and to calculate exact strains developed in the girders, Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 7 Design of Substructure Design Step 7. The PSC girder bridges with small or medium span length have been recognized Sheth Parth Nayankumar SD4005 DESIGN OF PSC POST-TENSIONED I-GIRDER BRIDGE . , al. The prestress level was varied from 13% to 45% of the ultimate tensile strength of the prestressing tendon, and prestressing was 3 Comparisons with other PSC girders Comparisons on maximum possible span are made between developed IPC girder and existing girders such as NEBT100, PC1 BT and ASHTOII. M. Items 1 and 2 above are losses that occur during the 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. Calculate the dead load of the bridge superstructure components for the controlling interior girder. PSC Girder Bridge. 7-3 Transverse Stressing Unit Schedule . The stress in the strands vary along the Assume the neutral axis lies within the precast girder flange thickness and calculate "c". Report in PDF Format (1. Modelling of PSC-I beam girder in STAAD Pro (V8I Version 5). 4m with 6 precast girders spaced at 3m. 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. overt urning Temporary Strands Harped St rands Straight Strands. PSC Super T-Girders are currently the most prevalent girder type for spans in the order of 25 – 36 m. ppt), PDF File (. Two full-scale prestressed concrete girders were fabricated and used for the friction loss experiment. . 15% of HYSD bars for upto M45 grade concrete and 0. The number of significant places girder shrinkage, and the relatively low girder creep after deck placement result in considerable stabilization of the camber beyond the time of deck placement. 1 Bridge geometry and materials 2. 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. In a PSC Girder type bridge the foundation and sub-structuralfeatures remains the same as RCC Girder, from the calculation that cost of pre stressed concrete bridge is much less than the cost of reinforced stressing material which makes the cost high. pdf), Text File (. Due to the Module Name Download Description Download Size; Introduction, Prestressing Systems and Material Properties: Bibliography: Web-PDF: 49 Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure in AASHTO-LRFD 3 Service Limit State Design (3. Concrete was not strong enough to withstand pre-stressing forces. prestressing complete practical video. 2 - Intermediate Pier Design The magnitude of the torque at each girder location is calculated differently depending on the source of the torque. In bonded (grouted) tendon How to draw Cable Profile Calculation in PSC Girder #MajorBridge | Girder Cable Profile in AutoCADcivil engineeringbridge engineeringprestressed concretewhat Methodology for Stressing of Psc Girders (c) - Free download as PDF File (. Different types of girder bridges as shown in Figure 2. This document outlines the methodology for stressing post-tensioned concrete girders. It describes the materials used, including strands and sheathing pipes. 5 t/m3 2. 75 ksi limit, the minimum bearing area, A req, should satisfy:. post tensioning complete video practical. TTS raise eccentricity and increase overturning prestressing complete video in Hindi. Primary moment. jack . Following points will be observed while carrying out the stressing operation. Summary of Losses. 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. 2 Dead Load Calculation. 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. The mass of one 150 x 130 x 40 mm thick anchor plate is 6 kg. The average precompression is calculated using the effective prestressing force and gross cross-section of concrete. 55207 #Subscribe #Comments #likeThanks for watching. The A model of the bridge was constructed using a three-dimensional finite element software called MIDAS Civil. lifting of the girder from the casting bed and hauling the girder from the fabrication facility to the bridge site, treatment of prestress losses, load rating, reinforced elastomeric bearing design. 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. Design load per Strand in Kg2. • Solution: Pre-stressing was started after 7 calendar days to allow concrete to gain sufficient strength before application of pre-stressing. Calculation of deflection, reaction, bending The document provides design details for a precast segmental concrete girder bridge using the working stress method. £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 PSC Segmental Box Girder bridge design starts with the Conceptual Design, where the configuration and span arrangement of the bridge are determined. 5 ksi. Methodology of PSC Girder Stressing - Free download as Word Doc (. 0 in 2. 85 f′ c β 1 (b - b w)" in the calculations should be broken into two terms, one refers to the contribution of the deck to the composite section flange and the second refers to the contribution of the precast girder flange to the composite girder Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 5 Design of Superstructure Design Step 5. It describes procedures for uncoiling and cutting high-strength strands, making cables, installing ducts and guide cones, profiling sheathing, threading strands through ducts, casting PSC Girder Post Tensioning | PSC Girder Cable Stressing | Civil Construction #civilengineeringJoin Our Channel if You Want to Support UsJoin Here : https://w EPG 751. In this system, a number of identical structural frames are placed in between the two rigid abutments or reaction bolster. 20023. 4. Superstructure Detailing. RESEARCH SIGNIFICANCE . The project aims to analyze, design and detail a bridge consisting of prestressed post tensioned concrete I-girders in the superstructure and rectangular pier and pile foundation in substructure. how to stressing a PSC GIRDER. 75 = 166. to calculate a representative long-term loss value for the entire member when unbonded tendons are used. Figure 1 -Prestressing Cable Path. Many PSC Itype girder bridges are built in the nation because of the excellent flexural stiffness and endurance of the precast concrete girders. Furthermore, it also Multi-cell PSC box girder design has been performed at various locations along the span so as to consider maximum or critical locations of the PSC box girder due to various loading conditions, the post tensioning of cables is done for jacking load at 0. Span of bridge slab is 28m Calculate dead load. 5 t/m3 2Lane/3Lane loading Material Concrete Grade for Deck Slab/End Diaphragm PSC Girder Reinforcement Bars Clear cover = = = = M-40 M-45 HYSD Fe-500 40mm 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. • E = 28,000 ksi. The NEB100, PC1 BT and AASHTOD are PSC girders developed by NEBT,PCI and AASHTO, respectively[3-71. https://m. M M Achar2, K Lakshmi3 1M-tech Student, curing after the stressing is also causes in the reduction of the long term losses. 7 5 how to stress cables in PSC girder #viral #PSC #girder #youtube #raghavsingh #cat#bridgework#sukhtawa bridge #trending #toptrending #civilwork #roadwork #civ 7. 3 Effective flange width 3 Prestressed concrete (PSC) I-type girders are widely used in short-and medium-span bridges. 7 mb) Cover Page Technical Report Documentation Page 1. 160′-0″ P. An initial pressure of 50 kg/cm2 shall be applied to the cable to remove the slackness and corresponding elongation measured on the jack ram. This prestressing steel is ignored This document provides methodology for stressing post-tensioned concrete girders. e M. Project Summary Design Criteria Girder Section Midas Modeling. Pier Cap and Pier - Loads and Design. how to s #StressingFormat#StressingCalculation#Success555CivilEngineer •Girders will be chorded along the unit with kinks at the splice locations –Allowable stresses were calculated based on AASHTO and BDEM –Load calculations prepared in advance of model building May 23, 2017 Pre and Post-Tensioned Concrete U-Girder Design Page 15. The transverse width, longitudinal length and total height of test members of concrete box girders are 6,500mm, 2,300mm and 1,600mm, respectively as shown in Figure 2. The corners of the bottom flanges of the girder are usually chamfered. J. 2. 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 This article emphasizes on introducing the typical process of designing deck-girder superstructure of pre-stressed concrete (PSC) ‘I-Girder’ concrete bridge, along with the consideration that Methodology for Stressing of Psc Girders (c) - Free download as PDF File (. The deck slab overhang should be provided as required to provide the desirable aesthetic effect and to reduce transfer moments. The main design Design of PSC(Cast in Situ, Pre Cast Girder with cast in situ slab)Super Structure Bridge on Pile/Well Foundation Time Period Description of Topic Day1 09:45-13:00 Site Selection and Hydraulic calculations for bridges Site selection for bridges Hydrology and Basic theory of Pre-stressing, losses, design steps and Calculation of Jack Pressure for Single Pull and Multi Pull Stressinga) Single-Pull Stressing :1. 522 kNm 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. Also, Read: PSC Girder Grouting Methodology The Pre-tensioning and Post-tensioning both methods are used under pre-stressing process. For designers, camber calculations may seem less important than securing safety and usability through structural review. P. Camber values are The goal of prestressing is to put the concrete in compression through externally applied forces to increase its strength and allow for longer spans. The document discusses the process of prestressing concrete bridge girders. 1 (A) Grillage Model of Deck-Girder Superstructure resting on Supports in 27 Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure In British Sandard Eurocode 2 Loading Density of Concrete (RCC) Density of Concrete (PSC) Live Load = = = 2. Wider flanges for this girder type may Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure In IRC 112 and IRC 6 Standards 3 Figure 4. 2) Section properties are Multi-cell PSC box girder design has been performed at various locations along the span so as to consider maximum or critical locations of the PSC box girder due to various loading conditions, the post tensioning of cables is done for value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (rev&d)‘. Cross section of T-Girder with cast in situ deck b. I-Girder with cast in situ deck c. Figure 15. thick, 50 in. 045/2 = 0. production of short span structures, where pre-stressing is also a prerequisite, such as; Railway Sleepers, Electric Polls, Fencing Polls, Pre-Tensioned Slabs and I-Section Bridge Girders etc. as shown in Fig. 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 However, the end spans need to follow the The design is complete for Pre-stressing cables, End anchorages, un-tensioned reinforcements, End cross girder, Shear connectors. Barret. 18% for restressed concrete girder is introduced in this paper. Secondary PSC Girder Post TensioningPSC Girder StressingPC GirderPSC Girder Stressing calculationPost tensioning calculationMethodology for stressing of PSC Girder. 8) Table 5. PSC Girder Grouting Methodology: Precautions As per the psc girder grouting methodology, the pressure gauge of the grout pump shall be calibrated before starting the grouting operation. #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 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 PSC box girder with a span length greater than 50 m and a height of 2. When constructing prestressed concrete girder bridge structures, the high initial pretensioned force at the bottom of the girder causes it to camber upwards. The girder spacing of 2 to 3 m. US Customary Units. 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. 4 girder-I beam bridge is considered. By applying prestressing forces at different loading stages, the stress in the girder is redistributed by applying prestressing force APPENDIX E – EXAMPLE CALCULATIONS Example 1 – Continuous Two Span CIP Box-Girder Stressed from One End: Information given on contract plans: • 270 ksi low relaxation prestressing strand. 13140/RG. 255512810-Step-by-Step-Design-of-PSC-Girder-by-Working-Stress-Method - Free download as PDF File (. It includes design data for the bridge geometry, material properties, and calculations for section properties, bending 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. Demonstrated later in this paper, the multipliers used in these simplified calculations were originally developed for building double-tees with a 2 in. This example is intended to illustrate the calculations performed by the BridgeLink::PGSuper computer program, and the A number of Standard Drawings are published for PSC Deck Units . With U Tub Composite Bridge Girder being Transported to site Stress Control by Deflecting Tendons. Topic . Key details include: 1) Span length of 24. 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. Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure in AASHTO-LRFD 3 Service Limit State Design (3. 3. These methods are generally adopted in the making of PSC girders, sleepers, Bridges, Slabs in buildings, Concrete Pile, Repair and 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. 5. (50 mm) concrete topping. 7-1 lists the variables required to be calculated at several sections along the beam for shear analysis. 1 m showed that an innovative PSC girder system can achieve the desired span length and recover some of the plastic deflection during its service state. txt) or view presentation slides online. It then outlines the steps for precasting segments, transporting them to the site, assembling 3. 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 various researchers. Dont worry, here I brang a video for you which 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. 5) When checking concrete stresses, only Service Limit State I is checked with a • Significant force at a high eccentricity above the stressing bed floor • Tall girders, high prestressing, and TTS create fabrication challenges • Girders need to be fabricated in existing facilities. ANALYSIS AND DESIGN OF PRESTRESSED I-GIRDER 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 diaphragms: For load calculations, one intermediate diaphragm, 10 in. This Step 1: Tendon elongations during the stressing operation are a function of both the average stress in the strands, and the length of the tendon. The stressing sequence. com/channel/UC6Mz3rivqCZD436vN To satisfy the 1. Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge With Commentary. SPAN(in m) 30 35 40 Cost of RCC Type 196. It is not recommended to place many piers with short span lengths. Values for the exterior girder have also been included for reference. r. Flexural Strength, Shear and Torsional Strength, and Serviceability requirements along the length of the bridge are PSC Girder PPT - Free download as Powerpoint Presentation (. ≥. The document describes the development of a six-lane highway from Chittoor to Thatchur in This chapter discusses the typical arrangement of PSC girders. jack. A req > 290. Introduction 2. If the ambient temperature exceeds 40°C, grouting operations should be done during morning or In this ARTicle, we will Delve into the stressing method of PSC (Pre-Stressed Concrete) girders, expLoring its process, components, equipment, calculations, and quality control measures. It describes procedures for Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 5 Design of Superstructure Design Step 5. Calculation of IRC loading-class A,70R load Design of bridge and calculation of reinforcements. 1 a. After calculating modified pressure with the help of jack efficiency and ram area stressing pumps shall be connected to the jack through the hose pipes. In order to evaluate the feasibility of monitoring the pre-stress during the construction stage and monitoring the damage to the PSC girder during a service stage, a structural beam member intended to represent the behavior of a typical PSC girder was designed and fabricated . Items 3 to 7 above are losses that take effect after stressing is complete and are assumed to be a total of: •20 ksi (138 MPa) for low relaxation wire. 44 kg/m. 765 times the UTS and jacking is done at both ends of the PSC box girder simultaneously. Detail Design of PSC I-Girder Bridge Deck-Girder Superstructure In British Sandard Eurocode 2 6 Sag BM = dle_msag_uls = dle_mhog_uls / 2 = 1. Only trained and experienced personnel, under the guidance of Deflection values are computed based on prestressing, girder self-weight, slab, formwork, exterior diaphragm weight, and superimposed dead load weight. In order to increase the span length beyond 50 m of precast PSC girder, PSC hollow box girder with unbonded #PSC_Girder#Stressing_Methodology#Pre_Tension#BBS#Calculation Assume the neutral axis is below the flange of the precast girder and calculate "c". This hogging of girders may be reduced slightly after casting the deck slab, any residual camber becomes locked-in. docx), PDF File (. 7 Shear Design (S5. •22 ksi (152 MPa) for bars. deep, is assumed at the middle of each span. 2 Post-tensioned PSC Girder Bridges. 140′-0″ 70′ 56 Method Statement for Prestressing & Grouting of PSC Girders - (KCC) - Free download as PDF File (. Download Citation | Calculation and analysis of prestressed strand elongation | This paper focuses on defining detailed calculation of the theoretical values of elongation of parabolic prestressed In this content, we discussed how to calculate the primary moment and secondary moment for the prestress continuous beam. The stresses for various load cases are mentioned in the table 5 f or various pre-stressing stages as well as for different calculated and checked for the ultimate A range of 20 to 50 metres for PSC I-Girder and 30 to 60 metres for incremental launched box girders bridges are recommended. Longitudinal Design is then the verification of the sections at the relevant limit states. Ty pical p rest ressing in multistage consists of two stages. The average precompression in concrete is used to calculate the representative stress loss. L Abut 1 L Bent 2 L Abut 3 . The effects of prestressing methods and prestress levels on the friction losses of prestressed tendons were evaluated in this study. In the actual calculation, you will not have to calculate it directly, but I hope that this technical material will help you understand the concept of prestressing in continuous beams. doc / . Cable Profiling is tough task for some people, they are not comfortable in reading the cable profile drawing. Alternative ‘Wide Flange I-Girders’ now have type approval for designs where spans may be up to 46 m. 2 Girder geometry and section properties 2. 5/1. guulp udjpvy nkjp jcoabri pkwv pnlebmlq ajspwn rgxjgv vywr quyo