桩-土-上部结构共同耦合作用下弹塑性地震反应分析
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摘要
针对某框架结构进行了在地震作用下桩-土-上部结构共同耦合作用时的上部结构弹塑性动力特性和规律的研究。结果表明:是否考虑桩-土-上部结构共同耦合作用时的弹塑性地震反应分析对计算结果有较大的影响;考虑桩-土-上部结构共同作用后柱应力在不同的楼层有放大现象,按折减系数方法来考虑相互作用并非总是安全和合理的,设计时应充分考虑弹塑性地震反应的影响。
The resulting internal forces and displacements are multiplied by reduction factors to obtain the design load.This paper deals with an investigation of the elasto-plastic dynamic characteristics of the superstructure for a frame structure under horizontal seismic excitations where the pile-soil-structure interaction is considered.The results of the investigation indicate that whether or not considering the pile-soil-structure interaction in elasto-plastic seismic response analyses has a great effect on the calculation results.With the consideration of the pile-soil-structure interaction results,the column stresses have amplification on different floors of the building.Therefore,the method using reduction factors to consider the pile-soil-structure interaction is not always safe or reasonable.So the elasto-plastic seismic response should be fully taken into account in design.
The resulting internal forces and displacements are multiplied by reduction factors to obtain the design load.This paper deals with an investigation of the elasto-plastic dynamic characteristics of the superstructure for a frame structure under horizontal seismic excitations where the pile-soil-structure interaction is considered.The results of the investigation indicate that whether or not considering the pile-soil-structure interaction in elasto-plastic seismic response analyses has a great effect on the calculation results.With the consideration of the pile-soil-structure interaction results,the column stresses have amplification on different floors of the building.Therefore,the method using reduction factors to consider the pile-soil-structure interaction is not always safe or reasonable.So the elasto-plastic seismic response should be fully taken into account in design.
引文
[1]Wu Liming,Wang Zijian.FEM analysis on the action of pile foun-dation-soil-superstructure in the earthquake force[J].Applied Me-chanics Materials,2011,71:1850-1854.
[2]刘立平,李英民,韩军.桩-土-结构相互作用弹塑性地震反应分析[J].世界地震工程,2004,20(3):160-165.Liu Liping,Li Yingmin,Han Jun.Elasto-plastic seismic responseanalysis of pile-soil-structure interaction[J].World Earthquake En-gineering,2004,20(3):160-165.
[3]王子健,武黎明,王继武,等.高层建筑在桩-土-上部结构共同耦合作用下的有限元分析[J].重庆交通大学学报:自然科学版,2008,27(1):44-48.Wang Zijian,Wu Liming,Wang Jiwu,et al.FEM analysis on pile-soil-superstructure interaction coupling reaction to high-rise building[J].Journal of Chongqing Jiaotong University:Natural Science,2008,27(1):44-48.
[4]郑颖人,孔亮.岩土塑性力学[M].北京:中国建筑工业出版社,2010.Zheng Yingren,Kong Liang.Geotechnical Plastic Mechanics[M].Beijing:China Building Industry Press,2007.
[5]李培振,吕西林,陈波,等.均匀土-箱基-结构相互作用体系的计算分析[J].地震工程与工程振动,2002,22(5):115-121.Li Peizhen,Lv Xilin,Chen Bo,et al.Computer analysis of soil-boxfoundation-structure dynamic interaction by ANSYS program[J].Earthquake Engineering and Engineering Vibration,2002,22(5):115-121.
[6]李围.ANSYS土木工程应用实例[M].北京:水利水电出版社,2007.Li Wei.ANSYS Civil Engineering Application Example[M].Bei-jing:China Water Power Press,2007.
[2]刘立平,李英民,韩军.桩-土-结构相互作用弹塑性地震反应分析[J].世界地震工程,2004,20(3):160-165.Liu Liping,Li Yingmin,Han Jun.Elasto-plastic seismic responseanalysis of pile-soil-structure interaction[J].World Earthquake En-gineering,2004,20(3):160-165.
[3]王子健,武黎明,王继武,等.高层建筑在桩-土-上部结构共同耦合作用下的有限元分析[J].重庆交通大学学报:自然科学版,2008,27(1):44-48.Wang Zijian,Wu Liming,Wang Jiwu,et al.FEM analysis on pile-soil-superstructure interaction coupling reaction to high-rise building[J].Journal of Chongqing Jiaotong University:Natural Science,2008,27(1):44-48.
[4]郑颖人,孔亮.岩土塑性力学[M].北京:中国建筑工业出版社,2010.Zheng Yingren,Kong Liang.Geotechnical Plastic Mechanics[M].Beijing:China Building Industry Press,2007.
[5]李培振,吕西林,陈波,等.均匀土-箱基-结构相互作用体系的计算分析[J].地震工程与工程振动,2002,22(5):115-121.Li Peizhen,Lv Xilin,Chen Bo,et al.Computer analysis of soil-boxfoundation-structure dynamic interaction by ANSYS program[J].Earthquake Engineering and Engineering Vibration,2002,22(5):115-121.
[6]李围.ANSYS土木工程应用实例[M].北京:水利水电出版社,2007.Li Wei.ANSYS Civil Engineering Application Example[M].Bei-jing:China Water Power Press,2007.
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