| 液化场地桥梁群桩基抗震分析简化方法 |
| |
| 引用本文： | 刘春辉,;唐亮,;凌贤长,;苏雷,;高霞,;张效禹,;林基聪.液化场地桥梁群桩基抗震分析简化方法[J].地震学刊,2014(5):566-570. |
| |
| 作者姓名： | 刘春辉 ;唐亮 ;凌贤长 ;苏雷 ;高霞 ;张效禹 ;林基聪 |
| |
| 作者单位： | [1]哈尔滨工业大学土木工程学院,哈尔滨150090; [2]深部岩土力学与地下工程国家重点实验室,江苏徐州221116 |
| |
| 基金项目： | 国家青年科学基金项目（51108134）; 国家重点基础研究发展973项目（2012CB026104）; 国家自然科学基金项目（90815009、50378031、50178027）资助 |
| |
| 摘 要： | 基于已完成的液化场地土—桩—桥梁结构地震相互作用振动台试验,利用两步法、等效单桩法,建立了液化场地群桩基础抗震分析的动力非线性文克尔地基梁模型。该模型考虑了桩—土相互作用的影响。首先,按照等刚度原则将群桩简化为等效单桩;其次,选用弹簧元件和阻尼原件并联的宏单元模拟桩—土动力相互作用;然后,计算地震作用下自由场地的土体位移和孔压比;最后,将地震作用下自由场地土体位移和孔压比作为模型的外部激励,计算桩的动力反应规律。将简化方法计算结果与液化场地桥梁桩基振动台试验结果进行对比发现,两者吻合较好,验证了简化方法的正确性。
|
| 关 键 词： | 液化场地 桥梁群桩基 振动台试验 抗震分析 |
Simplified Method for Seismic Analysis of Bridge Pile Group Foundation in Liquefiable Soils |
| |
| Institution: | TANG Liang , LING Xian-zhang , SU Lei , GAO Xia , ZHANG Xiao-yu , LIN Ji-cong (1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2. State Key Laboratory for Geomechanics ＆ Deep Underground Engineering, Xuzhou 221116, China) |
| |
| Abstract: | The nonlinear Beam-on-Winkler Foundation model was developed based on shaking table test,utilizing the two-step method,equivalent single pile method and Nonlinear Beam-on-Winkle-Foundation method. The effect of soil-pile interaction was considered in this model. First,the pile group foundation was simplified to an equivalent single pile according to stiffness equivalence theory. Secondly,soil-pile interaction was modeled by macroelement which was composed of paralleled spring and damper components. Thirdly,the soil displacement and pore water pressure ratio of free field under seismic load were calculated. Finally,the displacement of the free field and the pore pressure ratio during the earthquake were conducted as the boundary condition of nonlinear Beam-on-Winkle-Foundation. This simplified method was implemented in the FE software and verified by the results obtained from the shaking table tests. |
| |
| Keywords: | liquefiable soil bridge pile group shaking table test seismic analysis |
| 本文献已被 维普 等数据库收录！ |
|
