模态Pushover方法对长曲线桥的分析研究

Study of Modal Pushover Analysis on Long Curvature Bridge Structures

标准Pushover方法仅能较准确地分析一阶振型起主要作用的结构反应。因此考虑高阶振型影响的模态Pushover方法引起了人们的关注，而这一方法的研究主要关注的是建筑结构，其对桥梁结构的应用研究是非常有限的。采用模态Pushover方法计算一座桥梁结构的反应，并与标准Pushover方法及时程分析方法的计算结果进行比较，结果表明模态Pushover分析对桥梁结构有较好的适用性和发展潜力，同时，讨论这一方法需要改进的不足。

Nonlinear static pushover analysis can only analysis the structures, whose fundamental mode dominates the response. So, the modal pushover analysis that can consider higher modes effects has attracted attention, but such work has hitherto focused mainly on buildings, while corresponding work on bridges has been very limited. Adapt the modal pushover analysis procedure for the assessment of a bridges, this bridge is assessed using the static pushover analysis, as well as the THA. Comparative evaluation of the calculated response of the bridge illustrates the applicability and potential of the modal pushover method for bridges. Meanwhile, analyzes the weak points which need to be improved.