Main arch Optimization of Large Span CFST rigid frame tied arch bridge
|School||Central South University|
|Course||Bridge and Tunnel Engineering|
|Keywords||Concrete Filled Steel Tubular Rigid Frame Tied Arch Arch axis Optimal design Sensitivity Analysis|
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 .