有效地震动输入下基础隔震体系的响应分析

英文篇名：Response analysis of base-isolated systems considering effective input motion
中文刊名：合肥工业大学学报(自然科学版)
英文刊名：Journal of Hefei University of Technology(Natural Science)
作者：曾奔 ; 周福霖 ; 徐忠根
英文作者：ZENG Ben 1 ; 2 ; ZHOU Fu-lin 2 ; XU Zhong-gen 2 (1.School of Civil Engineering ; Xi'an University of Architecture and Technology ; Xi'an 710055 ; China ; 2.Research Center of Antiseismic Engineering ; Guangzhou University ; Guangzhou 510405 ; China)
中文关键词：土-结构相互作用 ; 阻抗函数 ; 有效地震动输入
英文关键词：soil-structure interaction ; impedance function ; effective input motion
出版日期：2009-05-28
机构：西安建筑科技大学土木学院;广州大学工程抗震研究中心;
年：2009
期：05
出版单位：合肥工业大学学报(自然科学版)

摘要

文章应用子结构法,利用锥体模型求得基础底部的阻抗函数,并结合对应的地震动有效输入,推导了在地震作用下基础顶部的实际阻抗函数和有效地震动输入,同时建立整个隔震体系方程,在考虑土-结构相互作用下,分析了不同性质地基土和不同基础埋深下的隔震体系。结果表明,在地基土剪切波速较小且埋深较大时,土-结构的相互作用对基础隔震体系的地震响应影响较大,在结构动力分析中应加以考虑。
The incidence wave is translated into scattered wave(exactly the effective input motion) when the foundation is embedded.The impedances and the effective input motions at the bottom of embedded foundation are evaluated by means of the cone model.Those parameters are transformed exactly to the corresponding ones at the top of the foundation.Then the equation of the whole base-isolated system is derived,and by taking into consideration soil-structure interaction(SSI),the effect of shear wave velocity and the embedded base-isolated system are analyzed.The results show that the effect of SSI may have great impact on the response of base-isolated structure when the shear wave velocity is small and the embedment of foundation is large,which must be considered in the dynamic analysis of structure.

引文

[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997:10-100.
    [2]Wolf J P.土-结构动力相互作用[M].吴世明,唐有职,译.北京:地震工程出版社,1989:20-80.
    [3]李海岭,葛修润.土-结构动力相互作用对基础隔震体系的影响[J].土木工程学报,2001,19(3):63-67.
    [4]李忠献,李延涛.土-结构动力相互作用对基础隔震的影响[J].地震工程与工程振动,2003,23(5):180-186.
    [5]Meek J W,Wolf J P.Cone models for embedded foundation[J].Geotechnical Engineering ASCE,1994,120(1):60-80.
    [6]Wolf J P.Foundation vibration analysis using simple physi-cal models[M].Englewood Cliffs,NJ:Prentice-Hall,1994:1-90.
    [7]Takewaki I,Takeda N,Uetani K.Fast practical evaluationof soil-structure interaction of embedded structures[J].SoilDynamics and Earthquake Engineering,2003,23(3):13-20.
    [8]Takewaki I,Fujii N,Uetani K.Nonlinear surface groundanalysis via statistical approach[J].Soil Dynamics andEarthquake Engineering,2002,22(6):499-509.