动水压力对高桩平台的动力响应  

Dynamic Response Analysis of High-Pile Bearing Platform Considering Dynamic Water Pressure

作　　者：陈光明[1] 张淑华[1] 袁宇[1] 刘春阳[1] 孙兴毅 

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《江南大学学报（自然科学版）》2015年第6期835-840,共6页Joural of Jiangnan University (Natural Science Edition)　

摘　　要：通过Ansys有限元软件,在考虑了桩体周围土体的非线性作用下,建立了桩基平台-土系统的地震反应分析三维有限元模型,分析和比较地震荷载作用下附加水质量和动水阻尼对桩基位移和弯矩的影响以及桩基空间布置对桩基内力的影响。结果表明:(1)附加水质量能增大桩基的位移和弯矩,动水阻尼能减小桩基的位移和弯矩;(2)两者共同作用时,桩基位移峰值的变化不明显,而桩基弯矩峰值出现了减小;(3)桩基的位移和弯矩与桩的空间位置具有相关性,且正斜桩的承载力优于负斜桩。The three-dimensional finite element model of the platform-soil system is proposed in this paper by using the finite element software Ansys. The system considers the nonlinear interactions between the surrounding soil and the piles. It makes comparisons and analysis about the influence of the additional water mass and the dynamic water damping on the pile displacement and the bending moment under force of earthquake. The effect of the pile space layout on the internal force of pile foundation is considered. The research results indicate that：（ 1） the additional water mass can increase the displacement and bending moment of the pile foundation,while the hydrodynamic damping has the opposite effects;（ 2） when the two forces work together,the peak of displacement of pile foundation presents a slight change,while the peak of the bending moment decreases;（ 3） the pile displacement and bending moment are related with the space position of the piles. The bearing capacity of the positive pile is better than that of the negative pile.

关 键 词：Morison方程 附加水质量 动水阻尼 地震反应 

分 类 号：TU312[建筑科学—结构工程]