内置工字型CFRP型材高强圆钢管高强混凝土轴压短柱组合效应分析  

Analysis of Combined Effect of High Strength Circular Steel Tube and High Strength Concrete Short Columns under Axial Compression with I-Shaped CFRP Profiles

作　　者：李帼昌[1] 西志远 李晓 LI Guochang;XI Zhiyuan;LI Xiao(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]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1期1-9,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51938009)。

摘　　要：目的 研究内置工字型CFRP型材的高强圆钢管高强混凝土短柱在轴心压力作用下三种材料的组合效应。方法 采用有限元分析软件ABAQUS对其进行数值模拟,通过相关试验验证模型的准确性,并对典型构件的破坏形态、受力全过程曲线进行分析,揭示构件各组成部分之间的相互作用和工作机理,评估CFRP配置率、钢材屈服强度、混凝土抗压强度、约束效应系数对组合效应的影响。结果 在高强圆钢管高强混凝土柱中内置CFRP型材,对构件的延性及安全裕度有显著提高,并改善了高强圆钢管对高强混凝土的约束,提高了构件的组合效应。结论 CFRP配置率控制在5.9%~8.4%,约束效应系数在1.2~1.4,钢材屈服强度不大于770 MPa时,构件中三种材料组合效应最佳。In order to research the combined effect of three materials on the high-strength concrete filled high-strength circular steel tube short columns with I-shaped CFRP profiles under axial compression.The finite element analysis software ABAQUS is used to conduct numerical simulation,verify the accuracy of the model through relevant tests,and analyze the failure form and stress curve of typical components,reveal the interaction and working mechanism between components of the component,and evaluate the effect of CFRP configuration ratio,steel yield strength,concrete compressive strength,and confinement effect coefficient on combined effect.The CFRP profiles embedded in the high-strength circular steel tube and high-strength concrete column can significantly improve the ductility and safety margin of the members,improve the confinement of the steel tube to the concrete,and improve the combined effect of the members.If the CFRP configuration ratio is controlled at 5.9%~8.4%,the confinement effect coefficient is between 1.2~1.4,and the steel yield strength is not greater than 770 MPa,then the combined effect of the three materials is the best.

关 键 词：轴压短柱 高强圆钢管高强混凝土 CFRP型材 约束机理 组合效应 

分 类 号：TU398.1[建筑科学—结构工程]