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Why do we need reinforcement on AASHTO beams?
AASHTO also requires reinforcement to confine the prestressing steel at the ends. Reinforcement requirements of the AASHTO standards in some cases lead to high reinforcing bar areas and difficulty in fitting the bars into the slender beam webs and flanges.See all results for this questionWhy do prestressed bridge girders crack during release?Characteristic cracks occur at prestressed bridge girder ends during prestress release due to the transfer of the prestress force to the concrete. This research investigated the quantitative and qualitative impact of strand debonding on cracking through nonlinear finite element analysis (FEA) and plant observations.See all results for this questionWhy are the properties of prestress girders important?The response of the prestress girder ends is inelastic due to concrete cracking and therefore simulating the concrete plastic properties is critical. For analysis efficiency, nonlinear material properties were only used for the disturbed concrete region close to the girder end extending inward a distance equal to the depth of the girder.See all results for this question
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Must include:reinforcement DecoilingSteel Strand - Tianjin Qiangbang Industrial Co., Ltd odm bridge prestressed reinforcement DecoilingChina Steel Strand catalog of Low Relaxation PC Steel Strand for The Construction (15.2mm), 12.7mm Prestressed Concrete Strand for The Construction provided by China manufacturer - Tianjin Qiangbang Industrial Co., Ltd., page1.STRAND DEBONDING FOR PRETENSIONED BRIDGE Article 5.10.10 of the AASHTO LRFD Bridge Design Specifications5, on designing the end zone splitting reinforcement for the web cracks, seems to be based on the empirical work of Marshall and Mattock7. AASHTO also requires reinforcement to confine the prestressing steel at the ends.Cited by: 9Page Count: 29File Size: 1MBAuthor: Pinar Okumus, Michael G. Oliva
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How does prestress transfer from steel to concrete?
1. INTRODUCTION The prestress transfer from the steel strands to concrete, at the ends of prestressed precast concrete girders, creates a region of stress concentration often resulting in formation of cracks during detensioning.See all results for this questionGUIDELINES FOR DESIGN AND CONSTRUCTION OF prestressed, concrete bridge girders. This type of bridge provides benefits of rapid construction, and improved structural performance. The research was performed to develop guidelines for design and construction and to address issues that significantly influence performance. The first goal was accomplished by development of guidelinesConstruction of New Brahmaputra Bridge & Road Works Project Name: 4-Laning of NH-37A from Km 0.00 (Kaliabor Tiniali road junction) to Km 17.300 (Dolabari road junction) including construction of New Brahmaputra Bridge on EPC basis in the state of Assam under Phase A of SARDP-NE.
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Dec 27, 2016 · The jigs are to be prepared of 16mm dia reinforcement bars and shall be fixed @ 1000 mm c/c by tying firmly with the reinforcement. It is preferable to weld the supporting bars with reinforcement cage of the girder after the profiling of the cables is checked and approved.Concrete Bridge Factory, Custom Concrete Bridge Looking for concrete bridge factory direct sale? You can buy factory price concrete bridge from a great list of reliable China concrete bridge manufacturers, suppliers, traders or plants verified by a third-party inspector. Source with confidence.China Prestressed Concrete Plastic HDPE Duct for odm bridge prestressed reinforcement DecoilingPrestressed Concrete Plastic HDPE Duct for Prestressed Anchor Cable (Call us: Mobile Phone: +8613673713569) 1. Materials: HDPE(high density Polyethylene). 2. Shape: Flat and Round. 3. Diameter: 35/40/45/50/55/65/70/75/80/90/100/110/120/135/140/160mm inner diameter, or as per your requirement. 4. Features: 1). Less friction loss during tension course. 2).