地震载荷下桩-土-上部结构作用机理与数值模拟  

Action mechanism and numerical simulation of pile-soil-structure interaction to seismic loading

作　　者：何晓慧[1] 孟达[1] 常占东 张彤[1] 

机构地区：[1]辽宁科技大学资源与土木工程学院,辽宁鞍山114051 [2]中冶焦耐工程技术有限公司,辽宁鞍山114002

出　　处：《辽宁科技大学学报》2008年第6期616-620,共5页Journal of University of Science and Technology Liaoning

摘　　要：桩-土-结构动力相互作用机理研究是提高动力作用下桩基础安全性的重要基础。在分析目前桩基抗震的主要计算模型及分析方法基础上,采用有限元软件ABAQUS,对桩-土-结构动力相互作用体系进行了水平地震荷载下的二维弹塑性有限元分析。比较了角桩、中间桩和中间边桩的剪应力幅值沿桩身的分布,得出了桩身剪应力幅值分布都呈桩顶大、桩尖小的倒三角分布;角桩剪应力幅值较大,边排中桩和中桩的剪应力幅值较小;随着桩间距的增大以及桩边长的减小,不同位置处的桩所分担的剪应力比例差距越来越小;桩土之间的滑移量在桩顶处大,桩尖处滑移量小;桩-土接触界面在动力作用过程中桩顶剪应力幅值有增大-减小-增大的变化规律。Mechanism research of the dynamic interaction of pile-soil is an important basis of the safety of pile foundation. Through analyzing mail calculation models and analysis methods of anti-seismic pile foundation, based on finite element software ABAQUS, two-dimensional elastic-plastic finite element analysis of dynamic interaction of pile-soil mechanism was done under horizontal earthquake action After calculation, the distribution of the shear stress amplitude along the pile was obtained and some valuable conclusions were drawn. In general, the distribution of shear stress amplitude along the pile is inverse-triangle; the comerpile has the maximum shear stress; the difference that different piles endure the shear stress reduces as the space among piles increases. The pile＇ s sliding is large at the top of the pile and small at the tip of the pile. The distribution of shear stress amplitude is also variational along the pile.

关 键 词：地震荷载 桩-土-结构 桩基础 数值模拟 

分 类 号：TU475.1[建筑科学—结构工程] TU473.1[建筑科学—土工工程]