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| 1 | 双参数层状地基中大直径单桩水平振动解析解与分析显示文摘基于Pasternak地基和桩体Timoshenko梁理论,考虑了轴向作用二阶效应,建立了大直径桩-成层土相互作用体系水平振动分析简化模型,采用微分变换方法和双剪切理论,结合桩土连续边界条件,进而推导出桩身位移、内力、转角解析解,并与已有相关解析解进行退化对比验证。在此基础上,探讨了桩身长径比、地基剪切系数、桩土模量比、桩身剪切变形系数及轴向荷载对桩基水平振动特性的影响规律。计算分析结果表明推导所得对应解析解,能综合考虑轴向压力二阶效应、桩周土和桩身剪切变形的影响,可为大直径桩基工程相关水平向振动分析和设计提供参考。 | 辛宇 崔春义 许成顺 梁志孟 王本龙 裴华富 | 2022 | 振动工程学报2022，35，3： | 3 |
| 2 | Longitudinal vibration characteristics of a tapered pipe pile considering the vertical support of surrounding soil and construction disturbance显示文摘This research is concentrated on the longitudinal vibration of a tapered pipe pile considering the vertical support of the surrounding soil and construction disturbance.First,the pile-soil system is partitioned into finite segments in the vertical direction and the Voigt model is applied to simulate the vertical support of the surrounding soil acting on the pile segment.The surrounding soil is divided into finite ring-shaped zones in the radial direction to consider the construction disturbance.Then,the shear complex stiffness at the pile-soil interface is derived by solving the dynamic equilibrium equation for the soil from the outermost to innermost zone.The displacement impedance at the top of an arbitrary pile segment is obtained by solving the dynamic equilibrium equation for the pile and is combined with the vertical support of the surrounding soil to derive the displacement impedance at the bottom of the upper adjacent segment.Further,the displacement impedance at the pile head is obtained based on the impedance function transfer technique.Finally,the reliability of the proposed solution is verified,followed by a sensitivity analysis concerning the coupling effect of the pile parameters,construction disturbance and the vertical support of the surrounding soil on the displacement impedance of the pile. | Li Zhenya Pan Yunchao He Xianbin Lv Chong Mohammad Towhid | 2024 | Earthquake Engineering and Engineering Vibration2024，23，1： | 0 |
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