桩土共同作用下水平受荷桩柱式桥台受力分析  

Horizontal Load Analysis of Pile Column Abutment Under Pile Soil Interaction

作　　者：陈磊 林丽霞[1] 张永亮[1] 丁南宏[1] CHEN Lei;LIN Lixia;ZHANG Yongliang;DING Nanhong(College of Civil Engineering, Lanzhou Jiaotong University, Lanzhou,Guansu 730070, China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《公路工程》2022年第3期23-29,96,共8页Highway Engineering

基　　金：国家自然科学基金项目(51368034)。

摘　　要：梁式桥下部结构计算中纵向水平力的分配往往涉及墩台抗推刚度的计算,其中桥台向岸侧抗推刚度在相关计算中十分重要。基于Winkler弹性土抗力理论,考虑桩土共同作用,得到台身与承台桩基控制微分方程,进而根据承台与桩基的内力变形协调条件,推导出多排低桩承台桩柱式桥台向岸刚度的计算公式。通过与三维实体有限元计算结果对比,验证了本文计算方法的可靠性,在此基础上分析了台身和桩身的位移、内力分布情况,为桩柱式桥台水平荷载作用下的受力分析提供参考。In the calculation of substructure of beam bridge,the distribution of longitudinal bridge horizontal force often involves the calculation of pier and abutment anti push stiffness,in which the anti push stiffness of abutment to shore side is very important in relevant calculation.Based on Winkler's elastic soil resistance theory and considering the interaction of pile and soil,the governing differential equation of abutment and pile cap is obtained.According to the internal force deformation coordination condition of pile cap and pile foundation,the formula for calculating the shore facing stiffness of pile abutment with multi row low pile cap is derived.By comparing with the results of 3D solid finite element calculation,the reliability of the calculation method in this paper is verified.On this basis,the displacement and bending moment distribution of abutment and pile body are analyzed,which provides reference for the stress analysis of pile column abutment under horizontal load.

关 键 词：桩柱式桥台 桩土相互作用 多排桩桩基 弹性土抗力 向岸刚度 

分 类 号：U443.21[建筑科学—桥梁与隧道工程]