自锚式悬索桥静力行为影响因素分析

分析了自锚式悬索桥等代梁的特点,对某座具体桥梁进行了有限元参数分析,并用等代梁解释分析结果,确定不同影响因素对于自锚式悬索桥静力行为的影响程度.研究结果表明,为了改善自锚式悬索桥的静力行为,可以增加主跨主缆垂跨比、主梁拱度、主缆材料的弹性模量、主梁材料的弹性模量、主梁截面惯性矩、吊索材料的弹性模量、吊索的截面面积,减小吊索的长度.

Influence Factor Analysis for Static Performance of Self-Anchored Suspension Bridge

Firstly,this paper analyzed the equivalent-beam’s trait of self-anchored suspension bridge by theory method. Secondly,based on some bridge,this paper calculated the bridge in detail through changing parameters by FEM. Thirdly,the different results because of different parameters were explained by the equivalent-beam. At last, influence extent of different parameters for static performance of self-anchored suspension bridge was identified. In order to prove the static performance of self-anchored bridge,the results show increasing cable ratio of main span, arch rise of main beam,elasticity modulus of cable and beam,beam inertia moment,suspender elasticity modulus and area,and reducing suspender length is available.