摘要
为揭示高层建筑群间相邻结构动力相互作用机理和结构行为变化,设计2个土-结构体系对照模型,在场地土条件相同的情况下,一个仅有单独的上部结构、另一个则包含5个上部结构,并分别进行振动台试验,获取上部结构关键部位在地震动激励下的反应。试验结果显示:在地震作用下,高层建筑群内结构存在明显的相互作用,群体建筑的沉降和倾斜较单独建筑增大;相邻建筑的存在会使上部结构频率降低;相邻建筑的相互作用使上部结构加速度反应和位移反应有时增大,有时减小,此变化取决于输入地震波的频谱特性;建筑群内中部建筑的加速度和位移反应强于周围建筑。
To reveal the mechanism of dynamic cross effect and the structural behavior change caused by adjacent buildings,two comparative models of soil-structure system were designed. Under the same site soil conditions,one model included a single upper structure,and the other included five. Two shake table tests were carried out to obtain the reaction of the critical parts of the structures under the ground vibration excitation. The results showed that under earthquake,there is a significant interaction among the structures inside highrise building group. The settlements and the tilts of group buildings increase over the separate one. The frequency of the structure decreases because of the existence of adjacent buildings. The adjacent buildings make the acceleration response and the top displacement of the structure increase or decrease,which depends on the input seismic waves. The middle building's reaction of acceleration and displacement are stronger than the surrounding buildings.
引文
[1]Celebi M.Seismic responses of two adjacent buildings:Interaction[J].Journal of Structural Engineering,1993,119(8):2477-2492.
[2]Yahyai M,Mirtaheri M,Mahoutian M,et al.Soil structure interaction between two adjacent buildings under earthquake load[J].American Journal of Engineering and Applied Sciences,2008,1(2):121-125.
[3]Tian Zibo,Cao Xuewen,Cheng Xudong.Seismic analysis of high-rise buildings considering soil-structure interaction[J].Henan Science,2011,29(4):443-446.[田子波,曹学文,程旭东.考虑土-结构动力相互作用的高层建筑地震响应分析[J].河南科学,2011,29(4):443-446.]
[4]Lu Xilin,Chen Yueqing,Chen Bo,et al.Shaking table testing of dynamic soil-structure interaction system[J].Earthquake Engineering and Engineering Vibration,2000,20(4):20-29.[吕西林,陈跃庆,陈波,等.结构-地基动力相互作用体系振动台模型试验研究[J].地震工程与工程振动,2000,20(4):20-29.]
[5]Tsogka C,Wirgin A.Simulation of seismic response in an idealized city[J].Soil Dynamics and Earthquake Engineering,2003,23(5):391-402.
[6]Groby J P,Tsogka C,Wirgin A.Simulation of seismic response in a city-like environment[J].Soil Dynamics and Earthquake Engineering,2005,25(7/8/9/10):487-504.
[7]Kham M,Semblat J F,Bard P Y.Seismic site-city interaction:Main governing phenomena through simplified numerical models[J].Bulletin of the Seismological Society of America,2006,96(5):1934-1951.
[8]Liu Tielin,Luan Yu,Zhong Wei.Numerical simulation of dynamic interactions between soil and buildings[J].Engineering Mechanics,2012,29(Supp 1):53-56.[刘铁林,栾宇,钟伟.土-建筑群动力相互作用的数值模拟[J].工程力学,2012,29(增刊1):53-56.]
[9]Clouteau D,Broc D,Devesa G,et al.Calculation methods of Structure-Soil-Structure Interaction(3SI)for embedded buildings application to NUPEC tests[J].Soil Dynamics and Earthquake Engineering,2012,32(1):129-142.
[10]Fariborz N A,Ali R T.Nonlinear dynamic response of tall buildings considering structure-soil-structure effects[J].The Structural Design of Tall and Special Buildings,2013,22(14):1075-1082.
[11]Cheng Lei,Lu Xilin,Li Peizhen.A review of soil-structure dynamic interaction research considering dynamic cross interaction effect[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):32-38.[程磊,吕西林,李培振.考虑相邻结构影响的土-结构动力相互作用研究综述[J].地震工程与工程振动,2010,30(2):32-38.]
[12]Tang Yiqun,Yan Xuexin,Wang Jianxiu,et al.Model test study of influence of high-rise building on ground subsidence[J].Journal of Tongji University:Natural Science,2007,35(3):320-325.[唐益群,严学新,王建秀,等.高层建筑群对地面沉降影响的模型试验研究[J].同济大学学报:自然科学版,2007,35(3):320-325.]
[13]Xu Bingwei.Shaking table test studying large-scale soilpile-complex structure interaction[D].Tianjin:Tianjin University,2009.[徐炳伟.大型复杂结构-桩-土振动台模型试验研究[D].天津:天津大学,2009.]