新型框架结构弹塑性地震反应的等效线性化方法研究

Study on Equivalent Linearization Method for Elastoplastic Seismic Response of New Frame Structures

等效线性化方法是计算结构弹塑性地震反应的实用方法。通过对几种等效线性化方法的比较分析,提出了基于FEMA440(2005)计算等效刚度和等效阻尼比的等效线性化方法;分别采用静力弹塑性分析方法和等效线性化方法,分析了局部使用高性能纤维增强混凝土新型框架结构的弹塑性地震反应。结果表明,两种方法所得结构的地震反应均比较接近。因此,本文建议的等效线性化方法能够较好地预测新型框架结构的弹塑性地震反应。

The equivalent linearization method is a practical method to calculate the elastoplastic seismic response of structures.In this paper,after several equivalent linear methods were compared and analyzed,the equivalent linearization method based on FEMA440 to calculate equivalent stiffness and equivalent damping ratio was proposed.The elastoplastic seismic response of new frame structures using high performance fiber reinforced concrete （HPFRC） in local region were analyzed by this equivalent linearization method and pushover analysis,respectively.The results showed that the seismic response of structures calculated by both methods were relatively similar,the equivalent linearization method can predict the new frame structure seismic response well.