静力弹塑性分析(Pushover Analysis)在多跨简支梁桥中的应用

Application of the static elastoplastic analysis(pushover analysis) to multi-spans simply supported bridges

阐述了静力弹塑性分析的基本原理与过程,介绍了该方法在桥梁工程中的应用与实践状况,并且结合一座6孔简支梁桥的抗震性能评估的工程实例,采用pushover方法对全桥模型进行了抗震性能的分析计算,结果表明该桥梁满足设防烈度下的抗震要求,同时也指出了采用pushover方法时应该注意计算模型和加载模式的选择等问题,为静力弹塑性分析方法在桥梁工程中的应用提供了参考。

In the paper the basic principles and the steps of the static elastoplastic analysis are reviewed,and the application of this method to bridge engineering is introduced.Based on the seismic performance evaluation for a six spans simply supported bridge,its seismic performance has been analysed in global model by pushover method.The results are shown that this bridge can satisfy seismic demand under the action of the design earthquakes,at the same time,reasonable calculation models and loading schemes should be noticed when using pushover ananlysis,and the application of the static elastoplastic analysis to bridgeworks can be put into practice.