玻璃纤维管钢筋混凝土空心柱的轴压徐变性能  

Creep behavior of glass fiber reinforced polymer tube filled with reinforced hollow concrete columns on axial compression

作　　者：张霓 郑晨阳 羡丽娜 王连广[2] ZHANG Ni;ZHENG Chenyang;XIAN Lina;WANG Lianguang(School of Civil Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,P.R.China;College of Resources and Civil Engineering,Northeastern University,Shenyang 110000,P.R.China)

机构地区：[1]辽宁工程技术大学土木工程学院,辽宁阜新123000 [2]东北大学资源与土木工程学院,沈阳110000

出　　处：《土木与环境工程学报（中英文）》2021年第6期88-94,共7页Journal of Civil and Environmental Engineering

基　　金：辽宁省自然科学基金(201705403030);辽宁省教育厅基础项目(LJ2019JL018)。

摘　　要：为研究玻璃纤维管钢筋混凝土空心柱轴压下的徐变性能,对空心柱轴压下的受力特性进行分析,建立了适用于玻璃纤维管钢筋混凝土空心柱轴压徐变公式。编制轴心受压荷载作用下徐变分析程序计算徐变应变与时间关系曲线,并通过已有试验对该程序的正确性进行验证。在程序正确性的基础上,计算空心率、混凝土强度、作用荷载及玻璃纤维管壁厚等主要参数对其轴压徐变性能的影响。结果表明:空心柱的徐变应变在28 d以内(作用初期)增长较快,28 d以后增长速度变得缓慢,大约6个月以后徐变应变趋于稳定。空心率和混凝土强度对玻璃纤维管钢筋混凝土空心柱轴压徐变影响较小,其次是玻璃纤维管壁厚,作用荷载对徐变影响较大。In order to study the characteristics of creep performance of glass fiber reinforced concrete hollow columns under axial compression,the mechanical properties were analyzed according to the mechanical characteristics of the hollow column under axial compression in this paper.The creep formula of the GFRP tube reinforced concrete hollow column was established under axial compression.A creep analysis program under the axial compression load was developed to calculate the creep strain-time relationship curve.And the correctness of creep program was verified by existing tests.On this basis,the influence of the main design parameters,such as applied load,thickness of GFRP tube wall,strength grade of concrete and hollow ratio on axial compression creep performance was calculated and analyzed.The results show that the creep of hollow columns increases rapidly in 28 days(the early stage of load action),and the growth rate becomes slower after 28 days.The creep tends to be stable after about 6 months.The hollow ratio and concrete strength have little effect on the axial compressive creep of GFRP concrete hollow columns,followed by the thickness of GFRP tube wall.The applied load has a greater effect on the creep.

关 键 词：玻璃纤维管 钢筋混凝土 空心柱 轴压 徐变性能 

分 类 号：TU378.3[建筑科学—结构工程]