摘要
为了较全面亦合理地揭示水平桩基振动特性,在建立桩的动力平衡方程式时均引入了桩顶静轴向力对水平位移影响的二阶偏导项,较为全面的揭示了群桩-分层土系统中各桩间的惯性相互作用效应(文中表征为动力位移相互影响因子)。由数值计算可知,桩顶轴向力的引入不能从本质上改变桩基振动形式,但会具有一定的P-△效应,其存在不仅增大了单、群桩水平变位,而且对基桩动力反应也会有明显影响。
The two-rank partial dynamic equilibrium equations of piles were presented on lateral displacement with the influence of static pile-head axis forces to reflect vibration characteristic of horizontal piles. The inertial interaction effect on pile-to-pile of pile-groups-stratum-soil system was revealed, that is described as the dynamic interaction factors. The numerical example demonstrates that the vibrating type will not essentially change with the axial forces on pile head, however, the dynamic P-△effect will engender which results in the horizontal-displacement augments of single pile or pile-groups. In addition, the dynamic response of pile foundation will be obviously influenced.
出处
《中南公路工程》
2007年第2期86-90,共5页
Central South Highway Engineering
关键词
桩—土—桩相互作用
分层地基
群桩动力分析
pile-soil-pile interaction
layered-soil foundation
dynamic analysis of pile-groups
