填方场地水厂结构桩基动力响应三维数值研究

3D Numerical Research on Dynamic Response of Pile Foundation in Water Plant Structure in Fill Site

桩基础是填方场地广泛采用的地基基础。文章依托西南地区某水厂建设工程,采用ABAQUS建立三维计算模型,分析了桩体的加速度、弯矩及剪力响应,探讨了地震动作用下地基-桩基-结构的动力响应规律。结果表明,桩体加速度随桩高的增加整体呈增大趋势,在桩顶处放大效应略有减小;群桩基础不同位置的动力响应有所差异,最靠近填土区域角桩的弯矩与剪力最大。

Pile foundation is a widely used foundation in fill site.Based on a water plant construction project in southwest China,a 3D calculation model is established by ABAQUS.The acceleration,bending moment and shear force response of the pile are analyzed,and the dynamic response law of foundation-pile foundation-structure under ground motion is discussed.The results show that the pile acceleration increases with the increase of the pile height,and the amplification effect at the top of the pile decreases slightly.The dynamic response of the pile group foundation varies at different positions,and the bending moment and shear force of the corner pile closest to the filling area are the largest.