双圆夹层钢管混凝土的组合弹性模量理论  

Theoretical Study on Composite Elastic Modulus of Concrete Filled Double Skin Tubes

作　　者：熊平 王升[1,2,3] 文桃 XIONG Ping;WANG Sheng;WEN Tao(School of Civil and Architectural Engineering,Yangtze Normal University,Fuling 408100,China;Engineering Research Center for Health Monitoring in Building Life Cycle and Disaster Prevention,Yangtze Normal University,Fuling 408100,China;Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250061,China)

机构地区：[1]长江师范学院土木建筑工程学院,重庆涪陵408100 [2]长江师范学院建筑物全生命周期健康检测与灾害防治工程研究中心,重庆涪陵408100 [3]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《华侨大学学报（自然科学版）》2019年第1期48-55,共8页Journal of Huaqiao University(Natural Science)

基　　金：重庆市教委科学技术研究项目(KJ1712304;KJ1601217);国家重点研发计划项目(2016YFC0801604;2016YFC0801607);长江师范学院校级科研基金资助项目(2016XJQN13)

摘　　要：采用厚壁圆筒空间轴对称弹性力学方法,考虑钢管与混凝土受力后的变形协调关系,建立夹层钢管混凝土的组合弹性模量计算模型;然后,计算分析和讨论含钢率、混凝土强度等级、泊松比等对夹层钢管混凝土组合模量的影响,并得到夹层钢管混凝土等组合模量曲线.研究结果表明:夹层钢管混凝土组合模量随着总含钢率的增加不断增大,当总含钢率不变时,与内外含钢率无关;随着钢管和混凝土的泊松比、混凝土强度等级以及混凝土和钢管弹性模量的增大,组合模量不断增大;夹层钢管混凝土与普通钢管混凝土对混凝土的紧箍效应基本相同.Adopting the spatial axisymmetric elastic mechanics method of thick walled cylinder,and considering the deformation coordination relationship between steel tube and concrete,the calculation model of composite elastic modulus of concrete filled double skin tubes is established.The influences of steel ratio,concrete strength grade and Poisson′s ratio on the composite elastic modulus of concrete filled double skin tubes are discussed.The equal composite modulus curve of the concrete filled double skin tubes is obtained.It′s shown that the composite modulus of concrete filled double skin tubes increases with the increase of the total steel ratio.When the total steel ratio is constant,the composite modulus of concrete filled double skin tubes is independent of the inside and outside steel ratio.The composite modulus increases with the increase of the Poisson′s ratio and the elastic modulus of the steel pipe and concrete,the concrete strength grade.The confinement effect of the concrete filled double skin tubes is similar to the effect of the ordinary concrete filled steel tube.

关 键 词：组合弹性模量 钢管混凝土 夹层钢管混凝土 双圆夹层 厚壁圆筒 

分 类 号：TU398[建筑科学—结构工程]