基于位移自适应Pushover分析方法  

Displacement-based Adaptive Pushover Procedure Analysis

作　　者：付占明 李玲[2] 金松 Fu Zhan-ming;Li Ling;Jin Song(N.E.U Engineering &Research Institute Co.Ltd.,Shenyang,110004 China;Hubei University of Science &Technology ,Xianning ,437100,China;School of Civil Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]东北大学设计研究院有限公司,辽宁沈阳110004 [2]湖北科技学院,湖北咸宁437100 [3]大连理工大学建设工程学部,辽宁大连116024

出　　处：《工程抗震与加固改造》2018年第5期59-64,共6页Earthquake Resistant Engineering and Retrofitting

摘　　要：为了克服传统Pushover方法的局限性,本文提出了一种基于位移自适应Pushover分析方法,这种方法采用位移加载方式进行Pushover。克服了传统基于力的Pushover方法无法准确预测性能指标的缺陷,同时不仅能考虑结构屈服后刚度变化还能(改成以及)考虑高阶振型影响。同时结合本文的Pushover方法,提出了新的目标位移确定方法。为了验证本文方法的有效性,选择了两个基准钢框架进行动力弹塑性时程分析,将各种计算方法结果与动力弹塑性时程分析结果进行比较。结果表明:综合来看,基于位移自适应Pushover方法与其他方法相比能准确预测结构在地震下的楼层位移、层间位移角以及楼层剪力。In order to overcome the limitations of the traditional Pushover method,a displacement adaptive pushover analysis method is proposed in this paper. This method uses displacement loading to carry out Pushover. It overcomes the defect that the traditional force based Pushover method can not predict the performance index accurately,not only can consider the influence of the degradation of the stiffness after the structures yield but also the higher mode effects. Combine the proposed pushover procedure,the innovative approach to determine the target displacement is presented. In order to verify the validation of the proposed method,the dynamic elastic-plastic time history analysis of two benchmark steel frames is carried out,and the results of various computational methods are compared with the results of dynamic elastic-plastic time history analysis. The results indicate that: compared with other methods,displacement adaptive Pushover method can accurately predict the story displacement,storey drift,and storey shear force distribution of the structure under earthquake.

关 键 词：PUSHOVER 位移自适应算法 目标位移 弹塑性时程分析 楼层位移 层间位移角 楼层剪力 

分 类 号：TU311.4[建筑科学—结构工程]