考虑相邻建筑物碰撞的反应谱  

Response spectrum considering adjacent buildings collision

作　　者：杨永强[1,2] 王梦莹 辛星 YANG Yongqiang;WANG Mengying;XIN Xing(CEA Key Lab of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration(CEA),Harbin 150080,China;MEM Key Lab of Earthquake Disaster Mitigation,Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动重点实验室,哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,哈尔滨150080

出　　处：《振动与冲击》2024年第23期186-193,219,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52078472);云南省重点研发计划项目(202402AC080003)。

摘　　要：为了研究相邻建筑物碰撞对其地震反应的影响规律,将相邻建筑简化为相邻单自由度体系,提出了碰撞反应谱的概念,碰撞反应谱既可反映碰撞对相邻结构地震响应的影响,也包含了地震动的特征。选取273条地震动记录,在弹性范围内统计分析了不同参数条件下的碰撞力大小和相邻结构地震反应的变化规律。分析表明:相邻结构质量相同时,质量越小,结构碰撞力越小,结构加速度反应越大;相邻结构质量不同时,质量小的结构反应受碰撞影响较大,且质量相差越大,影响越大。地面峰值加速度(peak ground acceleration,PGA)和防震缝宽度对碰撞谱的影响规律相似,即PGA越大、防震缝宽度越小,结构反应越大,反之越小。Ⅳ类场地的地震动作用下,碰撞对相邻结构加速度反应放大效应最小,其他三类场地相差不大。Here,to study effects of collision between adjacent buildings on their seismic responses,adjacent buildings were simplified into adjacent single-degree-of-freedom systems and the concept of collision response spectrum was proposed.Collision response spectrum could reflect effects of collision on seismic responses of adjacent structures,and also include characteristics of seismic motion.273 earthquake motion records were selected to statistically analyze changes in collision force magnitude and adjacent structural seismic responses under different parametric conditions within elastic range.Analysis showed that when adjacent structures have the same mass,the smaller the mass,the smaller the collision forces of structures,and the larger the acceleration responses of structures;when adjacent structures have different masses,structures with smaller masses are more largely affected by collision,and the larger the difference in mass,the larger the effects of collision;effects of peak ground acceleration(PGA)and aseismic joint width on collision spectrum are similar,i.e.,the larger the PGA and the smaller the aseismic joint width,the larger the structural responses,and vice versa;under the seismic action of class IV sites,the amplification effect of collision on acceleration responses of adjacent structures is minimum,for the other 3 types of sites,situations have little difference.

关 键 词：相邻建筑 地震碰撞 单自由度体系 碰撞反应谱 

分 类 号：TU375.4[建筑科学—结构工程]