【摘要】 MSP(Multi-step pushover method)法是符合现行规范要求用来评估建筑结构破损状态的新方法。实践证明它具有快速、简便及计算精度较高的特点,已经在建筑结构的震害预测工作中得到广泛应用。在MSP法中,破损刚度MSK的变化受诸多因素的影响,还没有完全掌握其影响因素的变化规律。文中针对MSP法中结构破损阶段的推覆刚度MSK模型的选择和改善问题,进行了专门研究和探讨,通过与非线性时程法结果进行对比,提出了改进的破损刚度模型。实例计算表明,文中提出的模型可用,分析误差小,有助于MSP法进一步完善。更多还原

【Abstract】 The multi-step pushover method(MSP method) is a new earthquake damage evaluation method according with the current norm,which is proved to be a method of high efficiency,simplicity and accuracy.It has been widely used in civil engineering seismic damage forecasting.In the MSP method,the stiffness model(MSK) of a civil engineering building is affected by several factors which have not yet been completely realized.In this paper,an improved model is put forward by comparing with the nonlinear time-stepping method.The calculation results for some cases indicate that the new model put forward in this paper is practicable,and the analytical error is small.It can be concluded that the new model is suitable for the demand of civil engineering building and further improvement of the MSP method.更多还原