结构受力层间位移(有害位移)计算方法研究  

Research on the Calculation Method of Forced Story Drift in Structure

作　　者：薛彦涛[1] 章万胜 金林飞[1] 

机构地区：[1]中国建筑科学研究院,北京100013 [2]中国市政工程华北设计研院,天津300074

出　　处：《建筑科学》2014年第3期1-7,共7页Building Science

基　　金："十二五"国家科技支撑计划(2012BAJ07B02)

摘　　要：将侧向作用下结构下部结构变形引起上部结构的变形定义为层间非受力位移,此时上部各层的楼层剪力为零,用结构楼层层间位移减去层间非受力位移即可得到结构楼层的受力层间位移或层间有害位移。基于此假定,本文提出受力层间位移计算的力法和位移法,通过框架剪力墙结构的受力层间位移的计算比较,分析两种方法的差异。采用力法时,对上部楼层的弯矩进行合理等效是关键,可以获得结构的非受力层间位移较精确解。采用位移法可方便快捷地计算楼层受力层间位移,同时结果为精确解。以位移法计算分析了框架结构、剪力墙结构和框架筒体结构受力层间位移角沿楼层高度的变化特点。结果表明,框架结构采用层间位移角作为反映结构破坏的参数基本合理,而剪力墙和框架筒体结构除底部楼层外,完全不可接受。The deformation of the upper structure structure, is defined as the unforced story drift, and the unforced story drift equals to a forced story drift and a displacement method are proposed to get the under lateral force, caused by the deformation of the lower the story shear produced by this is zero. The story drift minus or a harmful drift. Based on this assumption, a force method forced story drift. The differences between two methods are discussed through the comparison of calculation results on a frame and shear wall structure. Using the force method, calculating a reasonable equivalent moment from the upper floors is the key to get the exact solution of the unforced story drift. Displacement method can be easily and quickly used to calculate the exact solution of the forced story drift. By the displacement method, the characteristics of story drift along the height of the frame structure, shear wall structure and frame-tube structure are discussed. The results show that it＇s generally reasonable by using the story drift as the destructive parameter in frame structural but completely unacceptable in shear wall structural and frame-tube structural exceot the bottom floors.

关 键 词：层间位移角 受力层间位移角 有害位移角 无害位移角 楼层转角 

分 类 号：TU311.4[建筑科学—结构工程]