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| 单桩竖向动力阻抗计算模型研究 | |
| 引用本文： | 孔德森,栾茂田,凌贤长,仇清.单桩竖向动力阻抗计算模型研究[J].计算力学学报,2008,25(1):123-128. |
| 作者姓名： | 孔德森 栾茂田 凌贤长 仇清 |
| 作者单位： | 1. 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150009;山东科技大学,土木建筑学院,山东,青岛,266510 2. 大连理工大学土木水利学院,辽宁,大连,116024 3. 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150009 4. 滕州市建筑安装工程集团公司,山东,滕州,277500 |
| 基金项目： | 中国博士后科学基金 , 山东科技大学校科研和校改项目 |
| 摘 要： | 运用土动力学和结构动力学原理,同时考虑桩周土的弱化效应和桩-土界面的相对滑移效应,利用数理方程方法分别求解单桩与桩周近场土域及远场土域的振动方程,建立了竖向荷载作用下单桩动力阻抗函数的简化计算方法,提出了一种改进的非线性动力Winkler模型,确定了模型中各物理元件的参数,进而通过对比分析验证了计算模型的合理性,从而为桩-土-上部结构耦合系统的非线性分析奠定了基础。 |
| 关 键 词： | 桩基 竖向动力阻抗 相对滑移 竖向振动 |
| 文章编号： | 1007-4708(2008)01-0123-06 |
| 修稿时间： | 2006年1月10日 |
Study on computational model of vertical dynamic impedance of single pile |
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| KONG De-sen,LUAN Mao-tian,LING Xian-zhang,QIU Qing.Study on computational model of vertical dynamic impedance of single pile[J].Chinese Journal of Computational Mechanics,2008,25(1):123-128. | |
| Authors: | KONG De-sen LUAN Mao-tian LING Xian-zhang QIU Qing |
| Abstract: | A simplified mechanical model for computing the vertical dynamic impedance function of single pile is established based on a certain assumptions and the improved dynamic model of beam-on-Winkler foundation by using the principle of soil dynamics and structural dynamics.Both the softening effect of soils around pile during vibration and slippage along the pile-soil interface are taken into account.The characteristics of the frequency-dependency of dynamic stiffness and damping of pile are reproduced.It is shown through the comparative study on an example that the numerical results of dynamic impedance of pile computed by the proposed dynamic Winkler model are relatively rational.All these provide the base for the nonlinear analysis of dynamic pile-soil-structure interaction system. |
| Keywords: | pile foundation vertical dynamic impedance relative slippage vertical vibration |
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