中南大学学报（自然科学版）2011，Vol.42Issue(11)：3486-3493,8.
钢管混凝土格构柱极限承载力实用计算公式
Practical calculation formula of ultimate load carrying capacity about concrete filled steel tubular laced columns
摘要
Abstract
The slender ratio reduced coefficient model and the equivalent slenderness ratio calculation formula of the concrete filled steel tubular laced columns were proposed on the basis of theory analysis, and the equivalent slenderness ratio calculation formula was improved. A lot of ultimate bearing capacities of concrete filled steel tubular laced columns with different concrete strengths, steel strengths, lace bar areas, layout forms of lace bar, eccentricity ratio and slender ratio were computed using the numerical method, and the influence of them was analysised on the basis of improved equivalent slenderness ratio. The calculation formula on the slender ratio reduced coefficient of slender ratio reduced coefficient was proposed by combining numerical calculation results and the slender ratio reduced coefficient model. Finally, a lot of ultimate bearing capacities of components were computed using the calculation formula of slender ratio reduced coefficient and the double coefficient product formula of the regulation CECS28:90, and the calculation results were compared with the numerical calculation results and the test results. The results indicate that the concrete strength, steel strength, lace bar area, layout form of lace bar have little influence on the slender ratio reduced coefficient on the basis of improved equivalent slenderness ratio, and the influence can be neglected. The results agree well with each other and the slender ratio reduced coefficient calculation formula is verified to be correct.关键词
钢管混凝土/格构柱/计算方法/极限承载力Key words
concrete-filled steel tube (CFST)/ laced column/ calculation method/ ultimate bearing capacity分类
建筑与水利引用本文复制引用
周旺保,蒋丽忠..钢管混凝土格构柱极限承载力实用计算公式[J].中南大学学报（自然科学版）,2011,42(11):3486-3493,8.基金项目
国家自然科学基金资助项目(50438020,50778177) （50438020,50778177）
湖南省杰出青年基金资助项目(07JJ1009) （07JJ1009）
