埋入式基础地基阻抗函数分析
|
摘要
为简化现有地基动力阻抗分析和计算方法,采用埋入式基础的简化计算模型,推导了有利于工程推广应用的阻抗函数表达式,并借助Matlab软件对考虑土-结构动力相互作用时地基阻抗的振动特性进行了详细分析。研究表明:基础埋深比及土层的剪切波速、泊松比等参数对地基水平、摇摆及水平-摇摆耦合振动阻抗均有一定影响,且土层参数越小,埋深比越大,阻抗函数的变化就越显著。
In order to simplify the present foundation dynamic impedance analysis and calculation methods,a simplified calculation model is used to deduce the impedance function expressions in this paper.With the help of Matlab software,the vibration characteristics of the foundation impedance are analyzed in detail considering soil-structural dynamic interaction.Results show that such parameters as the depth of foundation,the soil shear wave velocity,and Poisson's ratio all have some effects on the impedance of rocking,horizontal and coupled horizontal-rocking vibrations,with the samller parameters of the soil,the bigger deepth of foundation and then the more striking changes of the impedence function.
In order to simplify the present foundation dynamic impedance analysis and calculation methods,a simplified calculation model is used to deduce the impedance function expressions in this paper.With the help of Matlab software,the vibration characteristics of the foundation impedance are analyzed in detail considering soil-structural dynamic interaction.Results show that such parameters as the depth of foundation,the soil shear wave velocity,and Poisson's ratio all have some effects on the impedance of rocking,horizontal and coupled horizontal-rocking vibrations,with the samller parameters of the soil,the bigger deepth of foundation and then the more striking changes of the impedence function.
引文
[1]栾茂田,林皋.非均质地基上条形基础动力阻抗函数的简化分析模型[J].振动工程学报,1993,6(3):263-268.Luan Maotian,Lin Gao.A simplified model for determining dynamic impedance of strip-footing on inhomogeneous multilayeredhalfspace[J].Journal of Vibration Engineering,1993,6(3):263-268.
[2]Meek J W,Veletsos A S.Simple models for foundations in lateral and rocking motion[C]//5th Wold Conference on Earth-quake Engineering.Rome,Italy,Feb.,1974:2610-2613.
[3]Baranov V A.On the calculation of excited vibrations of embedded foundations[J].Dynamic Prochnosti,1967,14:195-209.
[4]Beredugoy O,Novak M.Couple horizontal and rocking vibration of embedded footings[J].Canadian Getechnjcal,1972,19:477-497.
[5]Veletsos A S,Varbic B.Vibration of viscoelastic foundations[J].Earthquake Engineering and Structural Dynamics,1973,2(1):87-102.
[6]王开顺.地基阻抗与结构地震反应[J].地震工程与工程振动,1985,5(2):87-102.Wang Kaishun.Impedance of subsoil and seismic response of structures[J].Earthquake Engineering and Engineering Vibra-tion,1985,5(2):87-102.
[7]蒋通,宋晓星.用薄层法分析层状地基中条形基础的阻抗函数[J].力学季刊,2009,30(1):62-70.Jiang Tong,Song Xiaoxing.Analysis of impedance functions of strip foundations embedded in stratified soils by using thinlayer method[J].Chinese Quarterly of Mechanics,2009,30(1):62-70.
[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,2011,30(5):252-256.3Hu Canyang,Chen Qingjun,Xu Qingyang,et al.Simplified calculation method for impedance function of embedded block foundation[J].Journal of Vibration and Shock,2011,30(5):252-256.
[9]侯春林,李小军,潘蓉.核电厂结构地基阻抗函数不同规范采用的计算方法分析[J].核动力工程,2009,30(3):7-12.Hou Chunlin,Li Xiaojun,Pan Rong.Comparison and analysis of calculation methods used in different codes concerning impedance function of foundation for nuclear power plants[J].Nuclear Power Engineering,2009,30(3):7-12.
[10]范存新,张毅,薛松涛,等.考虑桩土动力相互作用时阻抗函数分析[J].辽宁工程技术大学学报,2005,24(5):686-688.Fan Cunxin,Zhang Yi,Xue Songtao,et al.Analysis of impedance function considering soil-pile dynamic interaction[J].Journal of Liaoning Technical University,2005,24(5):686-688.
[11]尚守平,余俊,王海东,等.饱和土中桩水平振动分析[J].岩土工程学报,2007,29(11):1696-1702.Shang Shouping,Yu Jun,Wang Haidong,et al.Horizontal vibration of saturated soil[J].Chinese Journal of Geotechnical Engineering,2007,29(11):1696-1702.
[12]孔德森,栾茂田,杨庆.非均质土层中单桩水平动力阻抗计算及影响因素分析[J].大连理工大学学报,2004,44(4):560-565.Kong Desen,Luan Maotian,Yang Qing.Simplified computational model and parametric studies of later dynamic impedance of single pile in non-homogeneous strata[J].Journal of Dalian University of Technology,2004,44(4):560-565.
[2]Meek J W,Veletsos A S.Simple models for foundations in lateral and rocking motion[C]//5th Wold Conference on Earth-quake Engineering.Rome,Italy,Feb.,1974:2610-2613.
[3]Baranov V A.On the calculation of excited vibrations of embedded foundations[J].Dynamic Prochnosti,1967,14:195-209.
[4]Beredugoy O,Novak M.Couple horizontal and rocking vibration of embedded footings[J].Canadian Getechnjcal,1972,19:477-497.
[5]Veletsos A S,Varbic B.Vibration of viscoelastic foundations[J].Earthquake Engineering and Structural Dynamics,1973,2(1):87-102.
[6]王开顺.地基阻抗与结构地震反应[J].地震工程与工程振动,1985,5(2):87-102.Wang Kaishun.Impedance of subsoil and seismic response of structures[J].Earthquake Engineering and Engineering Vibra-tion,1985,5(2):87-102.
[7]蒋通,宋晓星.用薄层法分析层状地基中条形基础的阻抗函数[J].力学季刊,2009,30(1):62-70.Jiang Tong,Song Xiaoxing.Analysis of impedance functions of strip foundations embedded in stratified soils by using thinlayer method[J].Chinese Quarterly of Mechanics,2009,30(1):62-70.
[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,2011,30(5):252-256.3Hu Canyang,Chen Qingjun,Xu Qingyang,et al.Simplified calculation method for impedance function of embedded block foundation[J].Journal of Vibration and Shock,2011,30(5):252-256.
[9]侯春林,李小军,潘蓉.核电厂结构地基阻抗函数不同规范采用的计算方法分析[J].核动力工程,2009,30(3):7-12.Hou Chunlin,Li Xiaojun,Pan Rong.Comparison and analysis of calculation methods used in different codes concerning impedance function of foundation for nuclear power plants[J].Nuclear Power Engineering,2009,30(3):7-12.
[10]范存新,张毅,薛松涛,等.考虑桩土动力相互作用时阻抗函数分析[J].辽宁工程技术大学学报,2005,24(5):686-688.Fan Cunxin,Zhang Yi,Xue Songtao,et al.Analysis of impedance function considering soil-pile dynamic interaction[J].Journal of Liaoning Technical University,2005,24(5):686-688.
[11]尚守平,余俊,王海东,等.饱和土中桩水平振动分析[J].岩土工程学报,2007,29(11):1696-1702.Shang Shouping,Yu Jun,Wang Haidong,et al.Horizontal vibration of saturated soil[J].Chinese Journal of Geotechnical Engineering,2007,29(11):1696-1702.
[12]孔德森,栾茂田,杨庆.非均质土层中单桩水平动力阻抗计算及影响因素分析[J].大连理工大学学报,2004,44(4):560-565.Kong Desen,Luan Maotian,Yang Qing.Simplified computational model and parametric studies of later dynamic impedance of single pile in non-homogeneous strata[J].Journal of Dalian University of Technology,2004,44(4):560-565.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心