高烈度区某高层住宅隔震设计应用与分析  

Application and analysis of seismic isolation design for a high-rise residential building in high seismic fortification intensity area

作　　者：陈启冬 许立英[2] 刘阳[1] 吴应雄[3] CHEN Qidong;Xu Liying;LIU Yang;WU Yingxiong(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]西南科技大学土木工程与建筑学院,四川绵阳621010 [3]福州大学土木工程学院,福建福州350108

出　　处：《南昌大学学报（工科版）》2021年第1期22-29,共8页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51878303);福建省住房和城乡建设厅科技研究开发项目(2020-K-64);福建省自然科学基金杰出青年项目(2020J06020)。

摘　　要：位于9度抗震设防区的西昌市某高层住宅结构,采用传统抗震设计方法抗侧力构件尺寸过大,层间位移难以控制,提出采用隔震橡胶支座的基础隔震形式进行设计和分析。通过Midas-Gen建立该结构三维有限元模型,综合考虑隔震层偏心率、抗风等要求,计算了结构水平向减震系数、隔震支座极限应力和上部结构层间位移角等指标。分析结果表明通过基础隔震设计,隔震层最大偏心率为0.65%,隔震结构X、Y两个水平方向的基本自振周期分别延长至原结构周期2.55倍和2.74倍;隔震后层剪力减少最大超过65.5%,层倾覆力矩减少超过66.0%,水平向减震系数为0.351;在设防地震和罕遇地震作用下隔震支座位移满足要求,且支座拉应力最大仅为0.91 MPa;在多遇地震作用下,结构隔震前的层间位移角不能满足规范要求,隔震后的最大层间位移角为1/1306。研究结果表明了位于9度区高层住宅,通过合理的基础隔震设计,可以明显降低上部结构响应,结构设计满足规范要求。A high-rise residential structure located in Xichang City,which is in the earthquake fortification zone of 9 degrees.The use of traditional seismic design methods would cause the size of the lateral force members to be too large,and the story drift was difficult to control.It was proposed to use isolation rubber bearings of the base isolation form for the design and analysis.The three-dimensional finite element model of the structure was established using Midas-Gen.Considering the eccentricity and wind resistance of the isolation layer,the horizontal damping coefficient,the ultimate stress of the isolation bearing and the story drift angle of the superstructure were calculated.The analysis results showed that the maximum eccentricity of the isolation layer was 0.65%through the basic isolation design,and the basic natural vibration periods of the isolation structure in the X and Y directions were extended to 2.55 times and 2.74 times than that of the original structure period,respectively.After seismic isolation,the storey shear force reduced by more than 65.5%,the storey overturning moment reduced by more than 66.0%,and the horizontal damping coefficient was 0.351.Under middle earthquake and rare earthquake,the displacement of the isolation bearing meet the requirements,and the maximum tensile stress of the bearing was only 0.91 MPa.Under frequent earthquakes,the story drift angle before isolation cannot meet the requirements of the code,and the maximum story drift angle after isolation was 1/1306.The results showed that the response of the superstructure of high-rise residential buildings in the area of 9 degrees can be significantly reduced by reasonable base isolation design,and the structural design meet the requirements of the code.

关 键 词：高烈度区 高层建筑 基础隔震设计 水平向减震系数 

分 类 号：TU352.12[建筑科学—结构工程]