Dissertation
Dissertation > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Arch bridge > Tied Arch Bridge

Main arch Optimization of Large Span CFST rigid frame tied arch bridge

Author ChenDongDong
Tutor QiaoJianDong
School Central South University
Course Bridge and Tunnel Engineering
Keywords Concrete Filled Steel Tubular Rigid Frame Tied Arch Arch axis Optimal design Sensitivity Analysis
CLC U448.225
Type Master's thesis
Year 2010
Downloads 61
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At present, there are some CFST Arch Bridge Linetype and literature section size optimization design , most of these studies focus on the shape optimization of arch axis , considering the less optimization of the arch axis shape and cross-section size . [ 1] In this regard do more detailed work , but in considering concrete shrinkage , creep , modulus of elasticity of concrete 0.85 times reduction simplified alternative , creep with the actual structure of the internal forces redistribution with large errors , the need for further improvement . In the literature [ 1 ] , based on the establishment of the internal force analysis process based on ANSYS steel pipe concrete creep , the optimization model is more refined and perfect . In addition , the use of optimization procedures of various design parameters single parameter sensitivity analysis, specific work as follows : ( 1) based on the secondary development of ANSYS APDL language , established a steel pipe concrete creep analysis process , and its numerical example correctness ; ( 2 ) the establishment of finer CFST Arch Bridge the optimization analysis model ; (3 ) a concrete filled steel tubular tied rigid frame through arch bridge optimized ; (4) the parameter sensitivity analysis of design parameters ; ( 5) parametric modeling to achieve the automated design of the shape of the arch axis ; ( 6) the use of the Midas / civil program to carry out a comprehensive check calculation of optimization results to obtain a satisfactory result . Gained to play a leading role on the total cost of design variables through sensitivity analysis , to provide a reference for the future to optimize the design of further studies ; show that the content and conclusions of this article has the value of engineering applications .

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