圆中空夹层钢管混凝土叠合长柱偏压性能分析  

Analysis on Eccentric Compressive Behavior of Circular Concrete-encased Concrete Filled Double Skin Steel Tube Long Columns

作　　者：王建超[1] 王兴雨 任庆新[2] WANG Jianchao;WANG Xingyu;REN Qingxin(School of Science,Shenyang Jianzhu University,Shenyang,China,110168;School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学理学部,辽宁沈阳110168 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第4期647-657,共11页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52108235)。

摘　　要：目的研究圆中空夹层钢管混凝土叠合长柱的偏压性能,提出其偏压承载力计算方法。方法以长细比、偏心率、混凝土强度、纵筋配筋率及外钢管直径为参数,利用ABAQUS有限元分析软件建立相应的有限元模型,考察不同参数对荷载-挠度曲线和荷载-弯矩曲线的影响,并进行工作机理分析;最后基于叠加理论给出偏压承载力计算方法。结果圆中空夹层钢管混凝土叠合长柱在偏压状态下的受力全过程可分为弹性、弹塑性和塑性3个阶段;长细比和偏心率是影响偏压承载力的主要因素,其中长细比由40增加到50和60时,承载力分别降低9.4%和18.9%;偏心率由0.2增加到0.4和0.6时,承载力分别降低31.0%和50.3%;由偏压承载力计算方法所得的结果与有限元模拟结果吻合较好。结论圆中空夹层钢管混凝土叠合长柱在减轻自重的情况下具有一定的承载能力和延性,偏压性能良好。In order to study the eccentric compression behavior of circular concrete-encased concrete filled double skin steel tube long columns and propose the calculation methods of carrying capacity,the parameters such as the slenderness ratio,eccentricity ratio,concrete strength,longitudinal rebars ratio and diameter of outer steel tube will be considered in this paper,and the corresponding finite element models are established by ABAQUS.Then investigate the effects of different parameters on load-deflection curves and load-moment curves and analyze the working mechanism of typical model.Finally,the calculation methods of components under eccentric compression are given based on the superposition theory.The whole loading process of circular concrete-encased concrete filled double skin steel tube long columns under eccentric compression can be divided into three stages:elastic,elastoplastic and plastic.The slenderness ratio and eccentricity ratio are the main factors which influence the carrying capacity of components,when the slenderness ratio increases from 40 to 50 and 60,the carrying capacity decreases by 9.4%and 18.9%,respectively;when the eccentricity ratio increases from 0.2 to 0.4 and 0.6,the carrying capacity decreases by 31.0%and 50.3%,respectively.The results obtained from eccentric bearing capacity calculation methods are in good agreement with the finite element simulation results.The study indicates that circular concrete-encased concrete filled double skin steel tube long columns have certain carrying capacity and ductility under the condition of lightening its own weight,and the eccentric compression behavior is good.

关 键 词：中空夹层钢管混凝土 钢筋混凝土 中空夹层钢管混凝土叠合柱 长柱 偏心受压 

分 类 号：TU398.1[建筑科学—结构工程]