土-桩-结构相互作用体系非平稳随机地震反应分析
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摘要
目前,有关土-结构动力相互作用问题的研究基本上多限于确定性的或平稳随机激励下的响应分析。文中基于某基岩加速度反应谱,利用文献[7]的方法求取基岩非平稳随机地震功率谱密度函数,采用有限元方法建立土-桩-结构相互作用体系的三维分析模型,对在非平稳随机地震激励下土-桩-结构相互作用体系进行了反应分析。首先对三种不同场地条件下的土-桩-结构相互作用体系进行了动力特性分析;然后,对在非平稳随机地震激励下桩基承台的反应和自由场反应进行了比较,给出了结构的位移功率谱响应结果。
At present,the research of soil-pile-structure dynamic interaction problem has basically and restrainedly been made the response analysis identified or stationary random incentive.Based on one bedrock acceleration response spectrum,the bedrock non-stationary random seismic power spectral density function was gotten using the method of reference[7].Using finite element method to build three-dimensional analysis modal of soil-pile-structure interaction system,the response analysis of soil-pile-structure interaction system under the non-stationary random seismic incentive was performed.First,the dynamic characteristic analysis of soil-pile-structure interaction system at three different sites condition was carried out;then,the comparison between bearing platform response of pile foundation and the response of free-field was made.Finally,the response results of displacement power spectral density of the structure were proposed.
At present,the research of soil-pile-structure dynamic interaction problem has basically and restrainedly been made the response analysis identified or stationary random incentive.Based on one bedrock acceleration response spectrum,the bedrock non-stationary random seismic power spectral density function was gotten using the method of reference[7].Using finite element method to build three-dimensional analysis modal of soil-pile-structure interaction system,the response analysis of soil-pile-structure interaction system under the non-stationary random seismic incentive was performed.First,the dynamic characteristic analysis of soil-pile-structure interaction system at three different sites condition was carried out;then,the comparison between bearing platform response of pile foundation and the response of free-field was made.Finally,the response results of displacement power spectral density of the structure were proposed.
引文
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[2]Gezetas G,Fan K,Kaynia A.Dynamic response of pilegroups with different configrations[J].Soil Dyn AndEarthq Eng,1993,12(4):239-257.
[3]Takemiya H,Yamada Y.Layered soil-pile-structuredynamic interaction[J].Earthquake Engineering andStructural Dynamics,1981,9:437-457.
[4]宋亚新.考虑土?桩?结构相互作用的框剪结构弹塑性地震反应分析[D].上海:同济大学,1998.
[5]何海龙.不同形式高层结构地震反应及抗震可靠度研究[D].上海:同济大学,2005.
[6]张国栋,王钊.基于反应谱的土与结构相互作用体系非平稳随机地震反应分析[J].振动与冲击,2005,24(4):31-34.
[7]江近仁,洪峰.功率谱与反应谱的转换关系和人造地震波[J].地震工程与工程振动,1984,4(3):1-10.
[2]Gezetas G,Fan K,Kaynia A.Dynamic response of pilegroups with different configrations[J].Soil Dyn AndEarthq Eng,1993,12(4):239-257.
[3]Takemiya H,Yamada Y.Layered soil-pile-structuredynamic interaction[J].Earthquake Engineering andStructural Dynamics,1981,9:437-457.
[4]宋亚新.考虑土?桩?结构相互作用的框剪结构弹塑性地震反应分析[D].上海:同济大学,1998.
[5]何海龙.不同形式高层结构地震反应及抗震可靠度研究[D].上海:同济大学,2005.
[6]张国栋,王钊.基于反应谱的土与结构相互作用体系非平稳随机地震反应分析[J].振动与冲击,2005,24(4):31-34.
[7]江近仁,洪峰.功率谱与反应谱的转换关系和人造地震波[J].地震工程与工程振动,1984,4(3):1-10.
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