桩承上部结构的地震动力相互作用设计探讨
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摘要
研究了水平地震作用下层状地基土中桩基建筑物的动力相互作用的特性,总结出各参与要素对动力相互作用体系地震响应的作用规律,并探讨了桩土上部结构共同作用程度的简单判别方法;编制了群桩分层土上部结构的动力相互作用分析及优化设计程序.实例分析表明,在带桩结构工程中应用该程序进行抗震作用下的优化动力计算是简单可行的,可由体系周期放大因子的值来确定采取相互作用设计计算与否,为桩承结构设计提供了新的分析思路.
This paper investigated the dynamic effects on the interaction of pile-supported structures subjected to lateral seismic load at layered-soil media.A preliminary method was proffered with the combination of present aseismatic design codes and the concept of soil-structure interaction.Considering the influence of several participant factors on seismic response,some method were summarized and simplified formulae were used to distinguish the interactive degree of whole system under discussion.A dynamic interactive program including optimization design of pile-supported structures is introduced.Numerical computation has proved that it is feasible to develop the method for dynamic analysis and a new design idea by defining the multiplier factor that will affect the interaction effect of structures is presented for pile-supported structures.The aseismatic design advices for pile-supported structures are provided with proper theoretical procedures.
This paper investigated the dynamic effects on the interaction of pile-supported structures subjected to lateral seismic load at layered-soil media.A preliminary method was proffered with the combination of present aseismatic design codes and the concept of soil-structure interaction.Considering the influence of several participant factors on seismic response,some method were summarized and simplified formulae were used to distinguish the interactive degree of whole system under discussion.A dynamic interactive program including optimization design of pile-supported structures is introduced.Numerical computation has proved that it is feasible to develop the method for dynamic analysis and a new design idea by defining the multiplier factor that will affect the interaction effect of structures is presented for pile-supported structures.The aseismatic design advices for pile-supported structures are provided with proper theoretical procedures.
引文
[1]NAKAMUTA T,TAKEWAKI I.Sequential stiffness design for seis-mic drift ranges of a shear building-pile-soil system[J].Earthquake En-gineering and Structure Dynamic,1996,25(12):1405-1420.
[2]LIN B C,TSAUR Y L.The seismic response of structure-visoe-lastic foundation systems in time domain and power spectra[J].Engineering Structure,1997,19(12):977-987.
[3]STEWART J P,FENVES G L,SEED R B.Seismic soil-structureinteraction in buildings II:Empirical findings[J].Journal ofGeotechnical and Geoenvironmental Engineering,ASCE,1999,125(1):38-48.
[4]蒯行成,沈蒲生.层状介质中群桩水平动力阻抗的简化计算方法[J].振动工程学报,1998,11(3):258-264.KUAI X C,SHEN P S.Simplificed method for calculating horizontal dy-namic impedances of pile groups in layered media[J].Journal of VibrationEngineering,1998,11(3):258-264(In Chinese)
[5]MAKRIS N,GAZETAS G.Dynamic pile-soil-pile interaction II:Lateral and seismic response[J].Earthquake Engineering andStructure Dynamics,1992,21(2):145-161.
[6]熊辉.层状场域内上、下部结构动力相互作用分析及其优化设计[D].长沙:湖南大学土木工程学院,2003.XIONG H.Dynamil analysis and optimizing design of lnteractiveeffect on upper-lower structural parts in multilayer-soil field[D].Changsha:College of Civil Enginerring,Hunan University,2003.(In Chinese)
[7]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismil design of buildings[S].Beijing:China Architecture and Boilding Press,2003.(In Chinese)
[8]WU W H,SMITH H A.Modal qnalysis for structures with soil-structure interaction[J].Earthquake Engineering and StructureDynamics,1995,24(3):283-299.
[2]LIN B C,TSAUR Y L.The seismic response of structure-visoe-lastic foundation systems in time domain and power spectra[J].Engineering Structure,1997,19(12):977-987.
[3]STEWART J P,FENVES G L,SEED R B.Seismic soil-structureinteraction in buildings II:Empirical findings[J].Journal ofGeotechnical and Geoenvironmental Engineering,ASCE,1999,125(1):38-48.
[4]蒯行成,沈蒲生.层状介质中群桩水平动力阻抗的简化计算方法[J].振动工程学报,1998,11(3):258-264.KUAI X C,SHEN P S.Simplificed method for calculating horizontal dy-namic impedances of pile groups in layered media[J].Journal of VibrationEngineering,1998,11(3):258-264(In Chinese)
[5]MAKRIS N,GAZETAS G.Dynamic pile-soil-pile interaction II:Lateral and seismic response[J].Earthquake Engineering andStructure Dynamics,1992,21(2):145-161.
[6]熊辉.层状场域内上、下部结构动力相互作用分析及其优化设计[D].长沙:湖南大学土木工程学院,2003.XIONG H.Dynamil analysis and optimizing design of lnteractiveeffect on upper-lower structural parts in multilayer-soil field[D].Changsha:College of Civil Enginerring,Hunan University,2003.(In Chinese)
[7]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismil design of buildings[S].Beijing:China Architecture and Boilding Press,2003.(In Chinese)
[8]WU W H,SMITH H A.Modal qnalysis for structures with soil-structure interaction[J].Earthquake Engineering and StructureDynamics,1995,24(3):283-299.
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