负载下外包钢筋混凝土加固轴压钢柱的承载性能有限元分析  

FINITE ELEMENT ANALYSIS OF BEARING CAPABILITY OF PRE-COMPRESSED STEEL REINFORCED CONCRETE COLUMNS UNDER LOADS

作　　者：王元清[1] 唐伟明[2] 贾连光[2] 周乐[3] Wang Yuanqing Tang Weiming Jia lianguang Zhou Le(KeyLaboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China College of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China Architecture Engineering College of Shenyang University,Shenyang 110044, China)

机构地区：[1]清华大学土木工程系土木工程安全与耐久教育部重点实验室,北京100084 [2]沈阳建筑大学土木工程学院,沈阳110168 [3]沈阳大学建筑工程学院,沈阳110044

出　　处：《钢结构》2017年第1期83-86,96,共5页Steel Construction

基　　金：<钢结构加固设计规范>国家标准管理科研专项课题(2013-04);国家自然科学基金项目(51408371)

摘　　要：为分析外包钢筋混凝土加固钢柱后组成叠合柱的轴压承载性能,应用ABAQUS建立三维有限元模型,对不同初应力系数时加固的外包钢筋混凝土叠合柱用进行了有限元模拟。结合有限元模型,分析初应力系数对加固后柱的轴压承载力的影响规律。初应力使得外包钢筋混凝土加固的钢柱荷载-变形位移曲线后移,轴力集中于钢骨,初应力系数对其承载力影响显著。分析表明:使用外包钢筋混凝土加固钢柱,初应力系数小于20%时,可按新建结构计算,初应力系数大于20%时,需要对强度进行折减。In order to investigate of axial compression bearing capacity of steel reinforced concrete composite column under monotonic loading,a three dimension finite element model was established by using ABAQUS software based on different initial stress coefficient. The influence of initial stress coefficient on the axial compression bearing capacity of composite column was analyzed. The initial stress resulted in the backward loads-displacement curve of steel reinforced concrete composite column,and the axial force focused on the steel bond,so the pre-load had a significant influence on bearing capacity. The results showed that in structure design,the steel reinforced concrete composite column could be calculated based on the requirements of a new building when the initial stress coefficient was less than 20%,and strength reduction should be conducted when the initial stress coefficient was greater than 20%.

关 键 词：外包钢筋混凝土 轴压 加固 有限元分析 初应力系数 

分 类 号：TU391[建筑科学—结构工程]