考虑群体效应的高层建筑土-结构相互作用参数研究
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摘要
采用ANSYS软件建立考虑群体效应影响的三维高层建筑的有限元模型。模型采用软土地基,上部建筑群为三栋框架剪力墙结构。研究土性、上部结构刚度、基础埋深和地震波等参数对结构-土-结构动力相互作用体系的动力特性和动力反应的影响。结果表明:随着土性的变化,SSSI体系的动力响应也会发生变化;上部结构刚度较大时,群体效应对体系的影响较显著;基础埋置深度的增大会削弱体系的动力反应;不同地震波激励下体系的动力响应不同。
ANSYS software is adopted to establish a three-dimensional model of high-rise building group.The soft soil is selected as ground soil,and the upper buildings are three frame-shear-wall structures in the model.The influences of soil property,rigidity of upper structures,buried depth and seismic type on dynamic responses of SSSI system are studied.The results show that the changes of soil properties affect the dynamic responses of system.Group effect is obvious when the stiffness of the uppper structure is large.The increase of the foundation depth weakens the dynamic responses.The dynamic response is different under the actions of different seismic waves.
ANSYS software is adopted to establish a three-dimensional model of high-rise building group.The soft soil is selected as ground soil,and the upper buildings are three frame-shear-wall structures in the model.The influences of soil property,rigidity of upper structures,buried depth and seismic type on dynamic responses of SSSI system are studied.The results show that the changes of soil properties affect the dynamic responses of system.Group effect is obvious when the stiffness of the uppper structure is large.The increase of the foundation depth weakens the dynamic responses.The dynamic response is different under the actions of different seismic waves.
引文
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[4] Xu J,Costantino C,Hofmayer C,et al.Seismic response prediction of NUPEC’s field model tests of NPP structures with adjacent building effect[J].Pressure Vessels and Piping Division (Publication) PVP,ASME,2004,486(PART1):1-11.
[5] Alam M I,Kim D.Spatially varying ground motion effects on seismic response of adjacent structures considering soil-structure interaction[J].Advances in Structural Engineering,2014,17(1):131-142.
[6] Trombetta,Nicholas W,Mason H,et al.Nonlinear soil-foundation-structure and structure-soil-structure interaction:centrifuge test observations[J].Journal of Geotechnical and Geoenvironmental.2014,140(5):04013057.
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[8] 窦立军,杨柏坡.高层建筑与相邻多层建筑间的动力相互作用[J].地震工程与工程振动,2000,20(3):15-21.Dou Lijun,Yang Baipo.Dynamic interaction of tall building with neighboring multi-storied building[J].Earthquake Engineering and Engineering Vibration,2000,20(3):15-21.(in Chinese)
[9] 张菁莉,陈国兴.深厚软弱地基上相邻桩箱基础高层建筑地震反应的数值模拟[J].世界地震工程,2003,19(4):99-105.ZhangJingli,Chen Guoxing.Numerical simulation of the earthquake response for adjacent double high-rise building with pile-box foundation on deep soft sites[J].World Earthquake Engineering,2003,19(4):99-105.(in Chinese)
[10] 王淮峰,楼梦麟,陈希,等.建筑群结构-土-结构相互作用的影响参数研究[J].同济大学学报(自然科学版),2013,41(4):510-514.Wang Huaifeng,Lou Menglin,Chen Xi,et al.Parametric study on structure-soil-structure interaction of high-rise buildings[J].Journal of Tongji University (Natural Science),2013,41(4):510-514.(in Chinese)
[11] Hardin B O,Drnevich V P.Shear modulus and damping in soils design equations and curves[J].Journal of Soil Mechanics and Foundation.ASCE,1992,98(7):603-642.
[12] 李辉,赖明,白绍良.土-结动力相互作用研究综述(Ⅰ)[J].重庆建筑大学学报,1999,21(4):112-116.Li Hui,Lai Ming,Bai Shaoliang.Research review of soil-structure interaction[J].Journal of Chongqing Jianzhu University,1999,21(4):112-116.(in Chinese)