基于Pushover方法的钢框架结构超强分析  

An analysis of overstrength factors of steel frame based on Pushover

作　　者：李东[1] 苏恒品 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]国电东北新能源发展有限公司,辽宁沈阳110027

出　　处：《东北电力大学学报》2011年第5期80-84,共5页Journal of Northeast Electric Power University

摘　　要：基于我国抗震规范设计了6榀典型钢框架结构,并利用Pushover方法确定了结构的整体能力曲线,研究了层数、加载方式、设防烈度对钢框架结构超强的影响。结果表明随设防烈度提高、结构层数的增加,钢框架结构的超强系数呈降低趋势,水平荷载分布模式对钢框架结构的超强影响较大,结构超强能力的计算应考虑高阶振型影响。Six plane steel frames were designed according to Chinese seismic code, the global capacity envelops of steel frames were obtained through pushover analysis. Overstrength factors of the structure were analyzed ac- counting for the story, lateral load distribution mode and seismic fortification intensity. The analysis results show that the overstrength factors decrease with the stories and seismic fortification intensity increasing. It is also found that lateral load distribution mode has large effect on the global capacity envelops, so the effect of high mode should be considered.

关 键 词：PUSHOVER方法 钢框架 水平荷载分布模式 超强 

分 类 号：TU393.2[建筑科学—结构工程]