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Prestressed concrete beam ultimate load nonlinear finite element analysis

Author: XiaRongQuan
Tutor: YangBingCheng
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Bridge Engineering Prestressed concrete beam FEM Ultimate strength Nonlinear Analysis
CLC: U441
Type: Master's thesis
Year: 2005
Downloads: 486
Quote: 18
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Abstract


Nearly 50 years ago, especially after the reform and opening up , China's construction of a number of different types of roads and bridges, railway bridges, rail road dual bridges, urban bridges and overpasses . For the old bridge , the operator after a long use in bridge structure will inevitably produce some defect or injury , and some may have been quite serious ; while for the new bridge we need to accurately assess the carrying capacity of the bridge , design and construction quality, thereby determining the reliability of construction . Both require the bearing capacity of the bridge structure we can have an accurate analysis , and the existing standard design approach obviously does not meet the requirements, further research needs to be done to this end . In reference to a large number of domestic and foreign research paper based on the results for the widely used prestressed concrete beams were studied. In order to facilitate the analysis of the reasonableness of calculated results , the design of the T-shaped model of prestressed concrete beams , and had ultimate load tests. Ansys finite element program will prestressed concrete T beam by separate entities Modeling of the beam from the force and deformation load to undermine the whole process of analysis : Given standardized calculation method using linear elastic errors caused , after this comparison of various nonlinear concrete constitutive relationship , the choice of the domestic construction industry concrete specification recommends a formula based on the measured parameters of the beams of nonlinear finite element calculation and the results with the experimental values ??and norms calculated for comparison , analysis and calculation errors , the conclusion that the model fully prestressed beams respectively , partially prestressed class A member , partially prestressed class B member ultimate strength . Through this analysis provides insight into the ultimate bearing capacity of prestressed concrete members .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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