全框支剪力墙结构地基土嵌固效应分析及研究

Analysis and Research of the Foundation Constraint Effect of Full-Frame Shear Wall Structure

针对无地下室的全框支剪力墙高层结构嵌固特点,选取一栋B级高度的全框支剪力墙结构建筑,建立地基土-结构三维有限元模型,探究水平地震和风作用下,结构在软基情况及地基处理后的桩顶水平位移。分析表明,在软土情况下,桩顶的水平位移显著,引起桩身附加弯矩不可忽视;同时提出水平作用下的最大桩顶位移与土层的变形模量大致呈y=a·x-b的关系。

According to the characteristics of the TOD full-frame shear wall structure with none basement,selects a Grade-B-height full-frame shear wall structure,to establishes a 3D soil-structure interactional finite element model.The analysis is main to studied the regularity of the pile top's horizontal displacement,with soft foundation treatment under the earthquake and wind load cases.The results show that the pile top's horizontal displacement is obvious,the additional bending moment of the pile is non-negligible.The paper also carried out that the pile top's displacement has the y=a·x-b relationship with the soil deformation modulus under the horizontal load cases.