空间钢构架—方钢管混凝土柱偏心受压承载力的计算  

Bearing capacity of spatial steel frame concrete filled steel tubular column under eccentric compression

作　　者：刘艾宇 唐兴荣[1] 周洲[1] 

机构地区：[1]苏州科技大学江苏省结构工程重点实验室,江苏苏州215011

出　　处：《广西大学学报（自然科学版）》2018年第1期114-125,共12页Journal of Guangxi University（Natural Science Edition）

基　　金：建设部科技研究项目(99-031-2)

摘　　要：空间钢构架—钢管混凝土柱是一种新型组合柱,钢管内、外混凝土具有一定的约束作用,这种双重约束作用的特征能够有效地提高柱子的承载力和变形能力。为了研究这种新型组合柱的偏心受压承载能力的计算方法,进行了空间钢构架—方钢管混凝土柱的约束机理分析,在此基础上,考虑混凝土的双重约束作用,建立了两种不同计算模型的空间钢构架—方钢管混凝土短柱偏心受压承载力的计算公式。分析表明:采用这两种不同计算模型建立的计算公式具有较好的精度,均可作为空间钢构架—方钢管混凝土短柱偏心受压承载力计算公式,为这种新型组合柱的实际工程应用提供了技术依据。The spatial steel frame concrete filled steel tubular column is a new type of composite column. The square steel tube has a restraining effect on both the core and external concrete. The double constraints can effectively improve the bearing capacity and seismic performance of the column. In order to study the cross-section bearing capacity of the column under eccentric compression,two different models of the column are proposed by considering the restrain effect of steel tube and spatial steel frame on concrete respectively. The formulas for the calculation of the cross-section bearing capacity of the composite column are established. The proximity of the calculated value to the experimental value is investigated. The analysis shows that the calculated value given by the formula agrees with the experimental value,which indicates that the formula canbe used for the bearing capacity of this composite column under eccentric compression and provide technical basis for practical application of this composite column.

关 键 词：空间钢构架混凝土 方钢管混凝土 约束作用 极限承载力 计算公式 

分 类 号：TU375.2[建筑科学—结构工程]