Dynamic response a large diameter tapered pile considering the vertical reaction of the surrounding soil and construction disturbance effect
GAO Liu1, 2, WANG Kuihua1, 2, LI Zhenya1, 2, GUO Haichao1, 2 WANG Ning3
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. Key Laboratory of soft soils and Geoenvironmental Engineering of Ministry of Education(Zhejiang University;
3. Institute of Geotechnical Engineering, School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, Jiangxi, PR China
Abstract:Discretizing the pile-soil system into finite segments, the complex shear stiffness on the pile side is derived. The normal reaction of surrounding on the annular projections at the interface of adjacent pile segments is simplified as a Voigt model, whose spring and damper coefficients are derived afterwards, then amended impedance function transfer method is proposed. Combing the amended impedance function transfer method, the dynamic equilibrium equation is solved to give an analytical solution of the impedance function at pile top. By comparing the solution proposed in this paper with other solutions, the advantage of tapered pile is confirmed further. Then a parameter study is conducted to give insight to the coupled interaction of the vertical reaction of surrounding soil with construction disturbance effect in low-frequency range, which has guiding significance for seismic design of pile foundation.
高柳1,2,王奎华1,2,李振亚1,2,郭海超1,2 王宁3. 考虑桩周土竖向作用和施工扰动效应时大直径楔形桩的纵向振动特性[J]. 振动与冲击, 2018, 37(2): 30-37.
GAO Liu1, 2,WANG Kuihua1, 2, LI Zhenya1, 2, GUO Haichao1, 2 WANG Ning3. Dynamic response a large diameter tapered pile considering the vertical reaction of the surrounding soil and construction disturbance effect. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 30-37.
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