基于锥体模型的埋置块式基础有效地震动输入研究
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摘要
用子结构法分析土-结构相互作用时,需要知道基础的有效地震输入。本文利用锥体简化模型研究埋置块式基础的有效地震动输入。首先,建立土-结构相互作用体系的基本运动方程,得到土-结构相互作用和基础有效地震输入之间的关系。在此基础上,利用埋置圆盘组来模拟埋置基础,分析得到了埋置基础有效地震动输入。最后,通过算例表明此方法具有很高的精度,适用于工程计算。
Foundation effective earthquake input is required when soil-structure interaction is analysed by substructure method.Foundation effective earthquake input of embedded block foundation is researched using simplified cone model in this paper.Firstly,dynamic equation of soil-structure interaction system is proposed,and relationship between soil-structure interaction and foundation effective earthquake input is derived.Secondly,the embedded foundation is modelled with a stack of disks and impedance function of embedded foundation is calculated. Finally,the model is validated in the paper.The numerical results indicate that this method has high precision and efficiency,which is applicable to engineering.
Foundation effective earthquake input is required when soil-structure interaction is analysed by substructure method.Foundation effective earthquake input of embedded block foundation is researched using simplified cone model in this paper.Firstly,dynamic equation of soil-structure interaction system is proposed,and relationship between soil-structure interaction and foundation effective earthquake input is derived.Secondly,the embedded foundation is modelled with a stack of disks and impedance function of embedded foundation is calculated. Finally,the model is validated in the paper.The numerical results indicate that this method has high precision and efficiency,which is applicable to engineering.
引文
[1]Meek J W,Wolf J P.Why cone models can represent the elastic half - space[J].Earthquake Engineering and Structural Dynamics, 1993,22(1):759-771
[2]Jaya K P,Prasad A M.Embedded foun dation in layered soil under dynamic excitaiions[J].Soil Dynamics and Earthquake Engineering, 2002,22(6):485-498
[3]Wolf J P.Foundation vibration analysis using simple physical models [M].Englewood Cliffs,NJ:Prentice-Hall,1994
[4]Pradhan P K,Baidya D K,Ghosh D P.Impedance functions of circular foundation resting on layered soil using cone model[J].Electronic Journal of Geotechnical Engineering,2003,8(B)
[5]Pradhan P K,Mandal A,Baidya D K,Ghosh D p.Dynamic response of machine foundation on layered soil;cone model versus experiments [J].Geotechnical and Geological Engineering,2008,26(4):453-468
[6]张剑寒,蒋通.层状地基上块式基础地基阻抗函数简化计算方法[J].工业建筑,2007,37(8):68-72 Zhang Jianhan,Jiang Tong.A practical methed for estimating impedance function of block foundation resting on layered soil[J]. Industrial Construction,2007,37(8 ):68-72
[7]张剑寒,刘志杰,蒋通.层状地基对块体基础地基刚度的影响[J].工业建筑,2008,38(s1):664-666 Zhang Jianhan,Liu Zhijie,Jiang Tong.Study on effect of layered soil on stiffness of block foundation resting on it[J].Industrial Construction,2008,38(s1):664-666
[8]胡灿阳,陈清军,徐庆阳等.埋置块式基础地基阻抗函数的简化计算方法研究[J].振动与冲击,20011,5(30):252-256 HU Can-yang,CHEN Qing-jun,XU Qing-yang.Simplified calculation method for impedance function of embfedded block foundation [J].Journal of Vibration and Shock,20011,5(30):252-256
[9]燕彬,黄义,王成林.任意刚性基础竖向动力阻抗的简化计算[J].世界地震工程,2005,3(1):91-96 YAN Bin,HUANG Yi,Wang Cheng-lin.Simplified method for dynamic vertical impedances of rigid foundations with arbitrary shapes[J]. World Information On Earthquake Engineeing,2005,3(1):91 -96
[10]蒋通,程昌熟.用薄层法分析层状地基中各种基础的阻抗函数[J].力学季刊,2007,6(28):180-186 Jiang Tong,Cheng Chang-shu.Impedance functions analysis of various foundations embedded in stratified soils by using thin layer method[J].Chinese Quarterly of Mechanics,2007,6(28):180- 186
[11]刘伟庆,王海,王曙光等.群桩基础阻抗函数的集总参数模型研究[J].振荡与冲击,2011,11(30):249-253 LIU Wei-qing,WANG Hai,WANG Shu-guang,DU Dong-sheng. Lumped-parameter model of pile group impedance function[J]. Journal of Vibration and Shock,2011,11(30):249 -253.
[12]孔德森,栾茂田,凌贤长等.单桩竖向动力阻抗计算模型研究[J].计算力学学报,2008,2(25):123-128 KONG De-sen,LUAN Mao-tian,LING Xian-zhang.Study on cmputational model of vertical dynamic impedance of single pile[J].Chinese Journal of Computational Mechanics,2008,2(25):123-128.
[13]Luco J E,Wong H L.Seismic response of foundations embedded in a layered half - space[J].Earthquake Engineering and Structural Dynamics,1987,15:233-247
[2]Jaya K P,Prasad A M.Embedded foun dation in layered soil under dynamic excitaiions[J].Soil Dynamics and Earthquake Engineering, 2002,22(6):485-498
[3]Wolf J P.Foundation vibration analysis using simple physical models [M].Englewood Cliffs,NJ:Prentice-Hall,1994
[4]Pradhan P K,Baidya D K,Ghosh D P.Impedance functions of circular foundation resting on layered soil using cone model[J].Electronic Journal of Geotechnical Engineering,2003,8(B)
[5]Pradhan P K,Mandal A,Baidya D K,Ghosh D p.Dynamic response of machine foundation on layered soil;cone model versus experiments [J].Geotechnical and Geological Engineering,2008,26(4):453-468
[6]张剑寒,蒋通.层状地基上块式基础地基阻抗函数简化计算方法[J].工业建筑,2007,37(8):68-72 Zhang Jianhan,Jiang Tong.A practical methed for estimating impedance function of block foundation resting on layered soil[J]. Industrial Construction,2007,37(8 ):68-72
[7]张剑寒,刘志杰,蒋通.层状地基对块体基础地基刚度的影响[J].工业建筑,2008,38(s1):664-666 Zhang Jianhan,Liu Zhijie,Jiang Tong.Study on effect of layered soil on stiffness of block foundation resting on it[J].Industrial Construction,2008,38(s1):664-666
[8]胡灿阳,陈清军,徐庆阳等.埋置块式基础地基阻抗函数的简化计算方法研究[J].振动与冲击,20011,5(30):252-256 HU Can-yang,CHEN Qing-jun,XU Qing-yang.Simplified calculation method for impedance function of embfedded block foundation [J].Journal of Vibration and Shock,20011,5(30):252-256
[9]燕彬,黄义,王成林.任意刚性基础竖向动力阻抗的简化计算[J].世界地震工程,2005,3(1):91-96 YAN Bin,HUANG Yi,Wang Cheng-lin.Simplified method for dynamic vertical impedances of rigid foundations with arbitrary shapes[J]. World Information On Earthquake Engineeing,2005,3(1):91 -96
[10]蒋通,程昌熟.用薄层法分析层状地基中各种基础的阻抗函数[J].力学季刊,2007,6(28):180-186 Jiang Tong,Cheng Chang-shu.Impedance functions analysis of various foundations embedded in stratified soils by using thin layer method[J].Chinese Quarterly of Mechanics,2007,6(28):180- 186
[11]刘伟庆,王海,王曙光等.群桩基础阻抗函数的集总参数模型研究[J].振荡与冲击,2011,11(30):249-253 LIU Wei-qing,WANG Hai,WANG Shu-guang,DU Dong-sheng. Lumped-parameter model of pile group impedance function[J]. Journal of Vibration and Shock,2011,11(30):249 -253.
[12]孔德森,栾茂田,凌贤长等.单桩竖向动力阻抗计算模型研究[J].计算力学学报,2008,2(25):123-128 KONG De-sen,LUAN Mao-tian,LING Xian-zhang.Study on cmputational model of vertical dynamic impedance of single pile[J].Chinese Journal of Computational Mechanics,2008,2(25):123-128.
[13]Luco J E,Wong H L.Seismic response of foundations embedded in a layered half - space[J].Earthquake Engineering and Structural Dynamics,1987,15:233-247
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