【摘要】 目的发展弹塑性数值模拟方法,为外包钢加固框架结构的抗震性能分析提供参考.方法基于纤维模型,提出对采用外包钢加固的混凝土柱进行静力非线性分析的方法,在此基础上研究在结构整体层次上的外包钢加固框架结构静力弹塑性分析方法,截面分析、构件分析及结构分析均在OpenSees平台上编程实现.结果构件层次上,经与两次不同试验的结果比较,验证了方法正确可行.运用自编程序,结合实际加固方案,探讨了在常用工程分析软件中如何进行外包钢加固框架这一特殊结构的静力弹塑性分析的实用方法.结论弹塑性分析方法能反映出局部加强后结构失效的演化过程,能方便地用于加固后结构抗震性能评估.更多还原

【Abstract】 The aim of the study is to develop the numerical simulation approach of the elastoplastic seismic performance of RC frame strengthened with externally bonded steel frame.Base on fiber model,the approach for nonlinear static analysis of RC column strengthened with externally bonded steel frame is proposed on the level of component,and the simulation results are found in good agreement with two experimental results,which proves the feasibility of the method.The nonlinear static analysis method of RC frame strengthened with externally bonded steel is presented on the structural level.The procedures for analysis of section,component and structure are programmed on OpenSees.The practical nonlinear static analysis method about how to apply the popular analysis software to the strengthened structure is discussed on the evaluation of a strengthening project in comparison with the results from program in this paper.The results show that the approach proposed in this paper is able to demonstrate the evolution of the structural failure after local strengthening,and can be applied conveniently to the seismic evaluation of the strengthened structures.更多还原