液化场地微型桩基地震响应三维数值分析  

Three dimensional numerical analysis of seismic responses of micropiles in liquefiable soils

作　　者：贺传友[1] 

机构地区：[1]安徽省水科院,合肥230009

出　　处：《安徽建筑工业学院学报（自然科学版）》2012年第4期13-17,共5页Journal of Anhui Institute of Architecture(Natural Science)

摘　　要：地震液化会加重桩基的破坏。基于三维快速拉格朗日FLAC3D分析软件,本文构建了三个不同倾斜度微型桩基数值仿真模型,探讨了液化场地微型桩在地震作用下的工作性状,并对比分析了桩不同倾斜角度下的桩头水平位移、桩身弯矩和土体孔隙水压力的变化规律。该研究可为微型桩的抗震设计提供参考。Serious damages to pile foundation induced by earthquake liquefaction are observed in many history earthquake cases. Based on the fast Lagrangian analysis of continua, FLACaD, three numerical simulation models on micropiles which are in the inclination degree of 0°, 15°, 25°, respectively, are constructed to investigate the performances of micropiles in liquefiable soils subjected to seismic load- ing. The principles of the lateral displacements, the bending moments of the pile and the express pore water pressure in the ground with different boundary conditions are discussed. Numberal results are active to reflect the seismic design of micropiles.

关 键 词：微型桩 地震响应 液化 超孔隙水压力 

分 类 号：TU4[建筑科学—土工工程]