Influence of sediment characteristics on dynamic response
at top of rock-socketed pile
WANG Kui-hua1, WU Wen-bing1,2, MA Shao-jun1, MA Bo-ning1
1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;
2. Engineering Faculty, China University of Geosciences, Wuhan 430074, China
Based on virtual soil pile model, the influence of sediment characteristics on the dynamic response of rock-socketed pile in layered soil was presented by means of Laplace integral transform technique and impedance function transfer method when the top of rock-socketed pile was undergoing arbitrary longitudinal exciting force. The sediment was modeled as virtual soil pile model whose cross-section area was same as the pile and the surrounding layered soils were described with the plane strain model. By using the initial conditions and boundary conditions of the soil-pile system, the analytical solutions for the longitudinal dynamic response of the pile top in frequency domain and the relevant semi-analytical solutions in time domain were obtained at condition of arbitrary excitation on the pile top. Based on the presented solutions, the influence of sediment characteristics on the dynamic response at the pile top was investigated. By using the parametric inversion method, it is proved that these solutions based on virtual soil pile model have sufficient accuracy for the theoretical curves were in good agreement with those obtained by the low-strain reflected wave method from the field measurement.
WANG Kui-hua, WU Wen-bing, MA Shao-jun, MA Bo-ning. Influence of sediment characteristics on dynamic response
at top of rock-socketed pile. J4, 2012, 46(3): 402-408.
［1］ 蔡邦国,陈德银. 嵌岩桩桩底沉渣在桩基检测信号中的反应［J］. 土工基础, 2005, 19(5): 89-90．
CAI Bangguo, CHEN Deyin. Reflection of residence around inserted pile bottom in pile foundation checking signals［J］. Soil Engineering and Foundation, 2005, 19(5): 89-90．
［2］ 旺昕,刘誉,徐辉. 沉渣对低应变曲线影响的仿真分析［J］. 土工基础, 2009, 23(3): 74-76．
WANG Xin, LIU Yu, XU Hui. Numeral analysis of low strain curves influenced by dregginess［J］. Soil Engineering and Foundation, 2009, 23(3): 74-76．
［3］ 王海东,尚守平. 瑞利波作用下径向非匀质地基中的单桩竖向响应研究［J］. 振动工程学报, 2006, 19(2): 258-264．
WANG Haidong, SHANG Shouping. Research on vertical dynamic response of singlepile in radically inhomogeneous soil during the passage of Rayleigh waves ［J］. Journal of Vibration Engineering, 2006, 19(2): 258-264．
［4］ 王奎华,李冰河,谢康和,等. 弹性支承桩受迫振动问题广义函数解及应用［J］. 浙江大学学报：工学版, 1998, 32(5): 545-551．
WANG Kuihua, LI Binghe, XIE Kanghe, et al. A generalized solution to the vibration of elastic supporting foundation pile under exciting force and its application［J］. Journal of Zhejiang University : Engineering Science, 1998, 32(5): 545-551．
［5］ 孔德森,栾茂田,杨庆. 桩土相互作用分析中的动态Winkler模型研究评述［J］. 世界地震工程, 2005, 21(1): 12-17．
KONG Desen, LUAN Maotian, YANG Qing. Review of dynamic Winkler model applied in pilesoil interaction analyses ［J］. World Earthquake Engineering, 2005, 21(1): 12-17．
［6］ 冯世进,陈云敏,刘明振. 成层土中黏弹性桩纵向振动分析及工程应用［J］. 中国公路学报, 2004, 17(2): 59-63．
FENG Shijin, CHEN Yunmin, LIU Mingzhen. Analysis and application in engineering on vertical vibration of viscoelasticity piles in layered soil［J］. China Journal of Highway and Transport, 2004, 17(2): 59-63．
［7］ NOGAMI T, KONGAI K. Time domain axial response of dynamically loaded single piles［J］. Journal of Engineering Mechanics Division, ASCE, 1986, 112: 1241-1252．
［8］ 王奎华,谢康和,曾国熙. 变截面阻抗桩受迫振动问题解析解及应用［J］. 土木工程学报, 1998, 31(6): 56-67．
WANG Kuihua, XIE Kanghe, ZENG Guoxi. An analytical solution to forced vibration of foundation pile with variable section impedance and its application［J］. China Civil Engineering Journal, 1998, 31(6): 56-67．
［9］ 胡昌斌,黄晓明. 成层黏弹性土中桩土耦合纵向振动时域响应研究［J］. 地震工程与工程振动, 2006, 26(4): 205-211．
HU Changbin, HUANG Xiaoming. A quasianalytical solution to soilpile interaction in longitudinal vibration in layered soils considering vertical wave effect on soils［J］. Earthquake Engineering and Engineering Vibration, 2006, 26(4): 205-211．
［10］ 王奎华. 成层广义Voigt地基中黏弹性桩纵向振动分析与应用［J］. 浙江大学学报：工学版, 2002, 36(5): 555-571, 595．
WANG Kuihua. Vibration of inhomogeneous viscouselastic pile embedded in layered soils with general Voigt model［J］. Journal of Zhejiang University: Engineering Science, 2002, 36(5): 555-571,595．
［11］ ZENG X,RAJAPAKSE R K N D. Dynamic axial load transfer from elastic bar to poroelastic medium［J］. Journal of Engineering Mechanics, ASCE, 1999, 125(9): 1048-1055．
［12］ CAI Yuanqiang, CHEN Gang, XU Changjie, et al. Torsional response of pile embedded in a poroelastic medium［J］. Soil Dynamics and Earthquake Engineering, 2006, 26: 1143-1148．
［13］ MUKI R, STERNBERG E. Electrostatic loadtransfer to a halfspace from a partially embedded axially loaded rod［J］. International Journal of Solids and Structures, 1970, 6:69-90．
［14］ NOVAK M, ABOULELLA F. Impedance functions of piles in layered media［J］. Journal of the Engineering Mechanical Division, ASCE, 1978, 104(EM3): 643-661．
［15］ NOVAK M, NOGAMI T, ABOULELLA F. Dynamic soil reaction for plane strain case［J］. Journal of the Engineering Mechanical Division, ASCE, 1978, 104(EM4): 953-959．
