考虑土-结构相互作用的双层柱面网壳结构三维地震反应分析
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摘要
基于刚性地基假定的双层柱面网壳结构抗震计算方法未充分考虑场地土对其地震反应的影响。为验证土-结构相互作用对双层柱面网壳结构三维地震反应的影响,本文以一个48m跨度的双层柱壳为研究对象,分别建立基于刚性地基假定的柱壳结构及其考虑土-结构相互作用的三维有限元整体模型,研究对比了这两种结构体系的动力特性,并用时程分析法对其进行了三维地震反应分析与对比。结果表明,考虑土-结构相互作用后,双层柱面网壳结构的自振周期延长,振型发生变化;结构位移增大,部分杆件轴力增大。因此,对双层柱面网壳结构的抗震分析应考虑土-结构相互作用的影响。
Based on the assumption of rigid foundation for seismic response of double-layer cylindrical latticed shell,the calculation methods have not considered the influence of site soil sufficiently.In order to verify the 3D seismic response of double-layer cylindrical latticed shell considering soil-structure interaction,3D finite element models of a double-layer cylindrical latticed shell structure with 48m span and its integrated soil-structure interaction system are established respectively.The contrastive analysis of dynamical characteristics and 3D seismic response with nonlinear time history analysis are made for the two structure systems.For double-layer cylindrical latticed shell structure,the results show that the natural vibration period increases,the vibration mode changes,the displacement increases,and the internal force of part of members increases when soil-structure interaction effect is considered.Therefore,it is suggested that soil-structure interaction influence should be considered for double-layer cylindrical latticed shell structure.
Based on the assumption of rigid foundation for seismic response of double-layer cylindrical latticed shell,the calculation methods have not considered the influence of site soil sufficiently.In order to verify the 3D seismic response of double-layer cylindrical latticed shell considering soil-structure interaction,3D finite element models of a double-layer cylindrical latticed shell structure with 48m span and its integrated soil-structure interaction system are established respectively.The contrastive analysis of dynamical characteristics and 3D seismic response with nonlinear time history analysis are made for the two structure systems.For double-layer cylindrical latticed shell structure,the results show that the natural vibration period increases,the vibration mode changes,the displacement increases,and the internal force of part of members increases when soil-structure interaction effect is considered.Therefore,it is suggested that soil-structure interaction influence should be considered for double-layer cylindrical latticed shell structure.
引文
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[11]CECS160:2004,建筑工程抗震性态设计通则(试用)[S]CECS 160:2004,General Rule for Performance-basedSeismic Design of Buildings[S](in Chinese)
[2]楼梦麟,邸龙.地震行波激励下单层柱面网壳反应分析[J].结构工程师,2005,21(5):48～52Lou Meng-lin,Di Long.Response Analysis of SingleLayer Cylindrical Reticulated Shell under Seismic Wave-Passage Excitations[J].Structural Engineers,2005,21(5):48～52(in Chinese)
[3]薛素铎,王雪生,曹资.空间网格结构多维多点随机地震响应分析的高效算法[J].世界地震工程,2004,20(3):43～49Xue Su-duo,Wang Xue-sheng,Cao Zi.An EfficientAlgorithm for Multi-dimensional and Multi-supportRandom Seismic Analysis of Spatial ReticulatedStructures[J].World Earthquake Engineering,2004,20(3):43～49(in Chinese)
[4]曹资,张超,张毅刚.网壳屋盖与下部支承结构动力相互作用研究[J].空间结构,2001,7(2):19～26Cao Zi,Zhang Chao,Zhang Yi-gang.A Study on theDynamic Interaction between Lattice Shells and theSupporting Structures[J].Spatial Structures,2001,7(2):19～26(in Chinese)
[5]廖振鹏.工程波动理论导论[M].北京:科学出版社,2002Liao Zhen-peng.Introduction to Wave Motion Theoriesin Engineering[M].Beijing:Science Press,2002(inChinese)
[6]林皋.土-结构动力相互作用[J].世界地震工程,1991,7(2):4～21Lin Gao.Soil-structure Dynamic Interaction[J].WorldEarthquake Engineering,1991,7(2):4～21(inChinese)
[7]陆新征,叶列平,缪志伟,等.建筑抗震弹塑性分析-原理、模型与在ABAQUS、MSC.MARC和SAP2000上的实践[M].北京:中国建筑工业出版社,2009Lu Xin-zheng,Ye Lie-ping,Miao Zhi-wei,et al.Elasto-plastic Analysis of Buildings Against Earthquake-theory,Model and Implementation on ABAQUS,MSC.MARCand SAP2000[M].Beijing:China Architecture&Building Press,2009(in Chinese)
[8]孙静.岩土动力学参数测试技术与应用[M].哈尔滨:黑龙江大学出版社,2007Sun Jing.Test Technology and Application ofGeotechnical Dynamical Parameters[M].Harbin:Heilongjiang University Press,2007(in Chinese)
[9]王松涛,曹资.现代抗震设计方法[M].北京:中国建筑工业出版社,1997Wang Song-tao,Cao Zi.Modern Seismic Design Method[M].Beijing:China Architecture&Building Press,1997(in Chinese)
[10]谷音,刘晶波,杜义欣.三维一致粘弹性人工边界及等效粘弹性边界单元[J].工程力学,2007,24(12):31～37Gu Yin,Liu Jing-bo,Du Yi-xin.3D Consistent Viscous-spring Artificial Boundary and Viscous-spring BoundaryElement[J].Engineering Mechanics,2007,24(12):31～37(in Chinese)
[11]CECS160:2004,建筑工程抗震性态设计通则(试用)[S]CECS 160:2004,General Rule for Performance-basedSeismic Design of Buildings[S](in Chinese)
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