核心高强钢管混凝土组合柱轴压承载力计算新方法  

A New Method to Calculate Axial Bearing Capacity of Composite Columns with Core of High-Strength Concrete-Filled Steel Tube

作　　者：龙跃凌[1] 蔡健[2] 

机构地区：[1]香港理工大学土木及结构工程学系 [2]华南理工大学土木工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2010年第11期26-31,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50878087);广东省自然科学基金资助项目(9451009001002744);科技部重大基础研究前期研究专项基金资助项目(2004CCA03300)

摘　　要：在分析核心钢管混凝土组合柱受力机理的基础上,针对核心钢管混凝土组合柱管内混凝土与管外混凝土约束效应的不同,同时考虑圆形截面和方形截面对钢管外混凝土的影响,提出了一种核心钢管混凝土组合柱轴压承载力计算的新方法.应用该方法对16根核心钢管混凝土组合柱试件的轴压承载力进行计算,并与现有方法进行比较,结果表明:所提出的方法优于现有方法,其计算结果与试验结果吻合良好,能较为合理地评估核心钢管混凝土组合柱的轴压承载力.Based on the analysis of the bearing mechanism of composite columns with core of high-strength concrete-filled steel tube,a new method to calculate the axial bearing capacity of the composite columns is proposed,which considers not only the difference in confinement effect between the concrete both inside and outside the tube,but also the influence of circular section and square section on the concrete outside the tube.The proposed method is then applied to the calculation of axial bearing capacity of 16 composite columns with core of high-strength concrete-filled steel tube,and the results are compared with those obtained by the existing methods.It is indicated that the calculated results accord well with the experimental ones,and that the proposed method is superior to the exis-ting methods because it can reasonably estimate the axial bearing capacity of composite columns with core of high-strength concrete-filled steel tube.

关 键 词：钢管混凝土 组合柱 约束效应 轴压承载力 

分 类 号：TU375[建筑科学—结构工程]