论文部分内容阅读
为研究不同形式中央扣对大跨径自锚式悬索桥地震反应的影响,以某主跨为406m的自锚式悬索桥为工程实例,利用Midas/Civil程序建立其未设中央扣、设置刚性和柔性中央扣的3种有限元模型,研究在一致激励地震下,考虑纵横竖3个方向的地震作用,得到3种模型的弹性阶段的反应谱分析和弹塑性阶段的时程分析。研究表明:在弹性阶段,设置中央扣对结构的位移与内力改变幅度不大;当进入弹塑性阶段,中央扣能较好地降低结构的变形、弯矩;但设置中央扣对结构受力影响不一致。
In order to study the influence of different types of central buckle on the seismic response of long-span self-anchored suspension bridges, a self-anchored suspension bridge with a main span of 406m is taken as an example. Midas / Civil procedures are used to establish a central anchorage without rigid buckles, Buckling of the three kinds of finite element models to study the earthquake excitation in the same direction, considering the vertical and horizontal directions of the three directions of the earthquake response of the elastic model of the three models and elastic-plastic phase of the time-history analysis. The results show that the center buckle can reduce the deformation and bending moment of the structure well when the elastic buckle is placed in the elastic-plastic stage. However, Inconsistent.