芦山地震中相邻建筑碰撞破坏调查与分析

为研究相邻建筑地震碰撞破坏机理,调查了芦山地震中相邻建筑碰撞破坏概况,并应用芦山地震加速度记录计算了相邻建筑地震碰撞反应,分析了防震缝宽度和结构质量对碰撞作用的影响.研究结果表明:防震缝宽度越大碰撞对相邻建筑地震反应的影响越小;相邻建筑物质量相近时,地震动输入方向对相邻建筑物碰撞作用影响较小;相邻建筑碰撞对自振周期相对较长的建筑的地震反应影响较大;相邻建筑质量越大,碰撞对其加速度反应影响越小,并且碰撞对质量相对较小的建筑加速度反应影响较大;本文对相邻建筑物碰撞作用的分析与震害实例基本相符.

Investigation andanalysis on adjacent buildings pounding damage in Lushan earthquake

A survey of adjacent buildings pounding damage caused by the Lushan earthquake is presented in this paper. Used the acceleration records from Lushan earthquake, the seismic response of adjacent buildings considering collision is calculated, and the influence of seismic joint width and building mass to the collision process is analyzed. Conclusions are as follows: the wider the seismic joint between adjacent buildings, the less and slighter the pounding; there is little effect of ground motion direction on the collision damage between adjacent buildings; the influence of pounding to the building seismic response become slight with the increase of building mass, and the influence is larger to the lighter building; analysis results about adjacent buildings collision in this paper are in conformity with the typical pounding damage example.