水泥土搅拌桩复合地基震动性能时程分析
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摘要
采用大型通用有限元程序ADINA,针对一例水泥土搅拌桩复合地基-基础-上部结构典型算例,建立了数学模型,并进行了有限元动力时程分析。计算模型中将水泥土搅拌桩和桩间土作为整体参与计算,复合土体和土体采用线性黏弹性动力本构模型,上部结构和基础采用线弹性本构模型,通过在边界设置阻尼器来模拟无限域中的动力人工边界。通过数值计算研究了复合土体模量、土体模量和加固深度对加固区和非加固区位移峰值、速度峰值和加速度峰值的影响,从而为水泥土搅拌桩复合地基抗震加固设计提供参考依据。
The cement-soil mixing pile composite foundations are getting more and more application to construction engineering. However,the research on their response under dynamic loading,especially under earthquake loading,is quite limited.Now,the seismic response analysis in the time domain is performed with ADINA program,considering the interactions among soil,foundation and the superstructure.Based on these analyses,some conclusions which may be useful for aseismic design of this type composite foundations are drawn.
The cement-soil mixing pile composite foundations are getting more and more application to construction engineering. However,the research on their response under dynamic loading,especially under earthquake loading,is quite limited.Now,the seismic response analysis in the time domain is performed with ADINA program,considering the interactions among soil,foundation and the superstructure.Based on these analyses,some conclusions which may be useful for aseismic design of this type composite foundations are drawn.
引文
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[5]郭海燕,孟凡顺,吴世明.水泥搅拌桩加固地基地震放大效应的有限元分析[C]//中国土木工程学会第八届土力学及岩土工程学术会议论文集.北京:万国学术出版社,1999.
[6]潘晓东,徐长节,蔡袁强.水泥搅拌桩加固坝基动力响应分析[J].振动工程学报,2001,14(3):359-363.PAN Xiao-dong,XU Chang-jie,CAI Yuan-qiang.Dynamic response analysis of foundation with cement mixing piles of a dam[J].Journal of Vibration Engineering,2001,14(3):359-363.
[7]梁旭.水泥搅拌桩复合地基动力特性及其与上部结构动力作用分析[博士学位论文D].杭州:浙江大学,2003.
[8]MARTIN G R,FINN W D L,SEED H B.Effects of system compliance on liquefaction tests[J].Journal of Geo-technical Engineering Division,ASCE,1978,104(4):463-480.
[9]刘汉龙,余湘娟.土动力学与岩土地震工程研究进展[J].河海大学学报,1999,27(1):6-15.LIU Han-long,YU Xiang-juan.Advance in soil dynamics and geotechnical earthquake engineering[J].Journal of Hohai University,1999,27(1):6-15.
[10]沈珠江.一个计算砂土液化变形的等价黏弹性模型[C]//第四届全国土力学及基础工程学术会议论文集.北京:中国建筑工业出版社,1986:199-207.
[11]ELTON AVENUE.Theory and Modeling Guide(VolumeⅠ,Ⅱ,Ⅲ):ADINA[R].Watertown:MA02472USA,2002.
[12]CLOUGH R W,PENZIEN J.Dynamic of Structures[M].New York:McGraw-hill Inc,1975.
[13]LYSMER J,KULEMEYER R L.Finite dynamic model for infinite media[J].Journal of Engineering Mechanics,ASCE,1969,95:759-877.
[14]廖振鹏,黄孔亮,杨柏坡,等.暂态波透射边界[J].中国科学(A辑),1984,26(6):50-56.LIAO Zhen-peng,HUANG Kong-liang,YANG Bai-puo,et al.A transmitting boundary for transient wave analyses[J].Scientia Sinica(A),1984,27(10):50-56.
[15]李建波.结构-地基动力相互作用的时域数值分析方法研究[博士学位论文D].大连:大连理工大学,2005.
[2]江次静行.深层混合处理工法与改良:地盘的耐震特性[J].基礎パッキン工法,1985,(2):15-23.
[3]江静贝,符圣聪.复合地基的地震反应分析[J].建筑科学,1996,(1):23-28.JANG Jing-bei,FU Sheng-cong.Seismic response of composite foundation analysis[J].Building Science,1996,(1):23-28.
[4]李海晓.复合地基和上部结构相互作用的地震动力反应分析[博士学位论文D].杭州:浙江大学,2001.
[5]郭海燕,孟凡顺,吴世明.水泥搅拌桩加固地基地震放大效应的有限元分析[C]//中国土木工程学会第八届土力学及岩土工程学术会议论文集.北京:万国学术出版社,1999.
[6]潘晓东,徐长节,蔡袁强.水泥搅拌桩加固坝基动力响应分析[J].振动工程学报,2001,14(3):359-363.PAN Xiao-dong,XU Chang-jie,CAI Yuan-qiang.Dynamic response analysis of foundation with cement mixing piles of a dam[J].Journal of Vibration Engineering,2001,14(3):359-363.
[7]梁旭.水泥搅拌桩复合地基动力特性及其与上部结构动力作用分析[博士学位论文D].杭州:浙江大学,2003.
[8]MARTIN G R,FINN W D L,SEED H B.Effects of system compliance on liquefaction tests[J].Journal of Geo-technical Engineering Division,ASCE,1978,104(4):463-480.
[9]刘汉龙,余湘娟.土动力学与岩土地震工程研究进展[J].河海大学学报,1999,27(1):6-15.LIU Han-long,YU Xiang-juan.Advance in soil dynamics and geotechnical earthquake engineering[J].Journal of Hohai University,1999,27(1):6-15.
[10]沈珠江.一个计算砂土液化变形的等价黏弹性模型[C]//第四届全国土力学及基础工程学术会议论文集.北京:中国建筑工业出版社,1986:199-207.
[11]ELTON AVENUE.Theory and Modeling Guide(VolumeⅠ,Ⅱ,Ⅲ):ADINA[R].Watertown:MA02472USA,2002.
[12]CLOUGH R W,PENZIEN J.Dynamic of Structures[M].New York:McGraw-hill Inc,1975.
[13]LYSMER J,KULEMEYER R L.Finite dynamic model for infinite media[J].Journal of Engineering Mechanics,ASCE,1969,95:759-877.
[14]廖振鹏,黄孔亮,杨柏坡,等.暂态波透射边界[J].中国科学(A辑),1984,26(6):50-56.LIAO Zhen-peng,HUANG Kong-liang,YANG Bai-puo,et al.A transmitting boundary for transient wave analyses[J].Scientia Sinica(A),1984,27(10):50-56.
[15]李建波.结构-地基动力相互作用的时域数值分析方法研究[博士学位论文D].大连:大连理工大学,2005.
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