钢骨-钢管高强混凝土长柱稳定承载力分析  

Analysis of Stability Bearing Capacity of Steel Tubular Slender Columns Filled with Steel-reinforced-concrete

作　　者：肖阿林[1] 何益斌[1] 黄频[1] 郭健[1] 

机构地区：[1]湖南大学土木工程学院

出　　处：《华中科技大学学报（城市科学版）》2008年第1期61-64,共4页Journal of Huazhong University of Science and Technology

基　　金：湖南省杰出青年基金(05JJ10009)

摘　　要：基于切线模量理论和钢管混凝土统一理论推导了钢骨-钢管高强混凝土组合轴压长柱弹塑性稳定承载力计算公式,理论计算值与试验结果吻合良好,在此基础上推导了该组合柱的临界长细比。以千分之一柱长作为初始挠度,利用数值计算方法对钢骨-钢管高强混凝土组合轴压长柱进行非线性全过程分析,数值计算的荷载-变形曲线与试验曲线吻合较好。在大量数值分析的基础上,提出了便于工程应用的钢骨-钢管高强混凝土组合轴压长柱极限承载力简化计算公式。Based on the tangent modulus theory and the unified theory of CFST, the tormula lor calculating the ultimate bearing capacity of elastoplasticity stability of axially loaded steel tubular slender columns filled with steel-reinforced-concrete was obtained. It showed that the calculated results were in good agreement with the test ones. In this foundation, the bounds slenderness ratio of this composite column was deduced through the stability theory of structure. Moreover, a numerical method was applied for the nonlinear full-procedure analyses of this composite columns by the considering of initial deflection of lo/1 000 length of the column. Load-deformation relationship curves of these columns were calculated and analyzed. The calculated curves agreed well with the experiment curves. Based on a large number of calculated data, a simplified calculating formula for the ultimate bearing capacity of axially loaded slender composite columns was proposed.

关 键 词：组合柱 长柱 极限承载力 切线模量理论 长细比 

分 类 号：TU318[建筑科学—结构工程] TU398