钢管混凝土组合柱轴心受压承载力计算方法  

CALCULATION METHOD FOR AXIAL COMPRESSIVE STRENGTH OF STEEL TUBE-REINFORCED CONCRETE COMPOSITE COLUMNS

作　　者：钱稼茹[1] 江枣[1] 

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

出　　处：《工程力学》2011年第4期49-57,共9页Engineering Mechanics

基　　金：国家自然科学基金重大研究计划重点项目(90815025)

摘　　要：简要介绍了钢管混凝土组合柱轴心受压承载力已有的主要计算方法。在提出组合柱轴压承载力极限状态及组合柱轴压峰值应变的基础上,建立了组合柱轴压承载力计算公式。采用该文公式计算了34个组合柱试件的轴压承载力,计算值与试验值符合良好。为使轴心受压组合柱的峰值应变大于管外箍筋约束混凝土的轴压峰值应变、小于钢管混凝土的轴压峰值应变,提出了钢管混凝土截面面积在组合柱总面积中所占比例的上限值建议。A brief introduction to the available main methods of calculating the axial compressive strength of steel tube-reinforced concrete composite columns is presented.The ultimate state of axial compressive strength of composite columns and a formula for calculating the peak compressive strain of the composite column are proposed.Based on those,formulae for calculating the axial compressive strength of composite columns are developed.The axial compressive strength of 34 composite column specimens are calculated by the developed formulae,the calculated results have good agreement with the test results.In order to make the peak compressive strain of the composite column less than the peak compressive strain of the stirrup confined concrete out of the steel tube and larger than the peak compressive strain of the steel tube confined concrete,the upper limit value of the proportion of the steel tube confined the concrete area over the overall sectional area of the composite column is suggested.

关 键 词：钢管混凝土组合柱 轴压承载力极限状态 轴心受压承载力 轴压组合柱峰值应变 钢管混凝土截面积上限值 

分 类 号：TU311.4[建筑科学—结构工程] TU398.9