基于ABAQUS的钢管混凝土斜桩工作性状分析  

Working Properties of Steel Tube Batter Piles with Concrete Infill Based on ABAQUS

作　　者：杨美良 李烈敏 孙坤江 韩锐 钟扬 YANG Meiliang;LI Liemin;SUN Kunjiang;HAN Rui;ZHONG Yang(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Zhejiang Jiaogong International Engineering Co.,Ltd.,Hangzhou,Zhejiang 310051,China;Hunan Airport Construction Headquarters,Changsha,Hunan 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]浙江交工国际工程有限公司,浙江杭州310051 [3]湖南机场建设指挥部,湖南长沙410114

出　　处：《中外公路》2024年第6期276-284,共9页Journal of China & Foreign Highway

基　　金：湖南省教育厅重点科学研究项目(编号:21A0213);浙江省交通运输厅科技项目(编号:JGGJ-JSFWHT-2021-00017)。

摘　　要：为探究竖向荷载作用下钢管混凝土斜桩桩身响应特征,该文以马来西亚Saribas桥的钢管混凝土斜桩为研究对象,基于数值模拟方法进行分析,研究了该类斜桩在竖向荷载作用下钢管内外壁摩阻力、截面处桩周的摩阻力以及钢管与混凝土芯的弯矩分配比。结果表明:钢管外壁0~15 m桩段被动侧摩阻力大于主动侧摩阻力,其他桩段则相反;钢管内壁的摩阻力较复杂,且存在摩阻力为零的桩段;同时,不同截面处钢管内外壁的摩阻力沿桩周呈不均匀分布;在弯矩分配上,桩顶处钢管承担的弯矩较大,而在距桩顶37 m处及混凝土芯桩端,混凝土芯承担更多弯矩,其他桩段钢管和混凝土芯的弯矩承担比接近50%。In order to explore the response characteristics of steel tube batter piles with concrete infill under vertical load,the steel tube batter pile with concrete infill used in Saribas Bridge in Malaysia was taken as the research object.Based on the numerical simulation method,the frictional resistance of the inner and outer walls of the steel tube,the frictional resistance around the pile at the section,and the bending moment bearing ratio between the steel tube and the concrete core of this type of batter pile under vertical load were studied.The results show that the passive-side frictional resistance of the 0–15 m pile section is greater than the activeside frictional resistance on the outer wall of the steel tube,but the active-side frictional resistance of other pile sections is greater than the passive-side frictional resistance.The frictional resistance of the inner wall of the steel tube is complicated,and there is a pile section with zero frictional resistance.The frictional resistance of the inner and outer wall of the steel tube at different sections shows a non-uniform distribution around the pile;the steel tube at the top of the pile bears a larger bending moment,while at 37 m from the top of the pile and at the end of the concrete core,the concrete core bears a larger bending moment,and the bending moment bearing ratio of steel tube and concrete core in other pile sections is close to 50%.

关 键 词：桥梁基础 钢管混凝土斜桩 桩土效应 ABAQUS 摩阻力 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]