高层剪力墙结构层间有害位移计算方法

Calculation method of harmful inter-story drift of high-rise shear wall structure

高层剪力墙结构在水平地震作用下的层间位移包含有害位移和无害位移两部分。从有害位移的定义出发,基于结构挠度方程提出一种简化解析法来计算层间有害位移;以某一15层双肢剪力墙为例,采用简化解析法和楼层转角法(分别以层间位移角,竖向构件切线角,楼板转角作为弯曲转角)来计算结构层间有害位移,并利用对角支撑法来确定弯曲转角的合理取值以及验证简化解析法的正确性。结果表明:结构底层层间位移即为有害位移;结构各楼层有害位移占比随着楼层的提高逐渐减小;采用楼板转角作为弯曲转角可以较为准确地计算结构层间有害位移;采用提出的简化解析法计算结构层间有害位移是可行的。

The story drift of high-rise shear wall structure consists of the harmful and harmless responses under horizontal earthquake.Starting from the definition of harmful inter-story drift,based on the structural deflection equation,a simplified analytical method of harmful inter-story drift is proposed.Taken a 15-story coupled shear wall for an example,harmful inter-story drift is calculated by the proposed method and the bending rotation angle method(taken the inter-story drift angle,the tangent angle of the vertical component,the rotation angle of floor as the bending rotation angle,respectively).The reasonable value of bending rotation angle is determined and the feasibility of the proposed method is testified by the method of setting brace on diagonal.The results show that the inter-story drift of the first floor is harmful inter-story drift;the ratio of the harmful inter-story drift decreases with the increase of floors;the harmful inter-story drift can be calculated correctly by the rotation angle of floor as the bending rotation angle;the proposed method to calculate the harmful inter-story drift is feasible.