结构弹塑性分析基底剪力的判断与探讨  

Discussion on the base shear of structural elasto-plastic analysis

作　　者：刘浩 甄圣威 刘鹏 汪洋 

机构地区：[1]奥雅纳工程顾问,北京100020

出　　处：《建筑结构》2014年第24期122-126,共5页Building Structure

摘　　要：在某项目的弹塑性分析过程中曾发现,结构在某些地震波作用下出现了弹塑性分析基底剪力大于弹性分析基底剪力的情况,这与一般的经验判断不相符。研究了地震波的能量谱特性,并以单自由度体系为例分析了结构基底剪力与地震波总输入能之间的关系,提出了该现象发生原因。通过研究处于不同周期的单自由度体系和框架结构弹性分析基底剪力和弹塑性分析基底剪力的关系,验证了该分析的正确性。A phenomenon that the base shear in elasto-plastic analysis is greater than that in elastic analysis under someseismic wave was found in the process of an elasto-plastic analysis of a practical project, which is not consistent withgeneral experience. Detailed analyses were performed on energy spectrum and the relationship of base shear and total inputenergy based on single degree of freedom system, in which the cause of the phenomenon was proposed. And the correctnessof the analysis was verified by studying the relationship of base shears in elastic analysis and in elasto-plastic analysis ofsingle degree freedom system and frame with different periods.

关 键 词：弹塑性分析 基底剪力 总输入能 能量谱 

分 类 号：TU318[建筑科学—结构工程]