摘要
基于对我国现行规范给出的按剪切刚度、剪弯刚度和楼层剪力与楼层层间位移比等三种计算楼层侧向刚度方法的研究,指出剪切刚度是剪弯刚度的简化算法,当抗侧构件高宽比1≤h/b≤4时,采用剪切刚度计算误差较大;由于无害位移的存在,按层间剪力和层间位移比来计算楼层刚度,会使得结构中上部楼层的刚度计算值比实际刚度偏小;剪弯刚度可综合考虑楼层各抗侧构件的剪切、弯曲和轴向刚度的影响,按其计算的楼层侧向刚度结果比较合理。
There are three methods to evaluate the story lateral stiffness in current codes,which is shear stiffness method（SSM）,shear-flexural stiffness method（SFSM） and ratio of story shear and drift method（RSDM）.Detailed studies on three methods have been carried in this paper.The error induced by SSM which is simplification of SFSM will be considerable when the slender ratio of members is between 1 and 4.Without considering the effect of harmless story drift,the upper story stiffness calculated by RSDM is usually smaller than the actual stiffness.The result by SFSM is more reasonable because the shear,flexural and axial stiffness of the vertical member can be taken into account.
出处
《结构工程师》
2010年第6期21-25,共5页
Structural Engineers
关键词
侧向刚度
剪切刚度
剪弯刚度
楼层剪力与楼层位移比
lateral stiffness
shear stiffness
shear-flexural stiffness
ratio of shear and story drift
