纯扭荷载作用下内嵌H型钢钢管混凝土柱的受力性能研究  

Study on Mechanical Behaviors of H-section Steel Reinforced Concrete-filled Steel Tubular Columns under Pure Torsion

作　　者：陶修[1] 皮正波 赵轩[1] 罗崯滔 聂影[1] 陈春君 王宇航[3] Tao Xiu;Pi Zhengbo;Zhao Xuan;Luo Yintao;Nie Ying;Chen Chunjun;Wang Yuhang(CISDI Engineering Corporation,Chongqing 400013,China;Department of Building Engineering,Hunan Institute of Engineering,Xiangtan 411104,China;College of Civil Engineering,Chongqing University,400045,China)

机构地区：[1]中冶赛迪工程技术股份有限公司,重庆400013 [2]湖南工程学院建筑工程学院,湘潭411104 [3]重庆大学土木工程学院,400045

出　　处：《特种结构》2022年第4期1-6,共6页Special Structures

基　　金：重庆市技术创新与应用发展专项(cstc2019jscxgksbX0013)。

摘　　要：钢管混凝土柱因其受力性能良好得到广泛推广,本文在钢管混凝土柱中内嵌H型钢,并通过自行制作设计的加载装置对其进行纯扭试验。试验过程中共制作了3个内嵌H型钢钢管混凝土柱,其截面形式为两个圆形截面和一个方形截面。通过纯扭试验,研究其在荷载作用下的破坏形态和受力性能,通过长细比的变化,分析了扭矩-扭转角滞回曲线、扭矩-扭转角骨架、力学特征以及刚度退化等指标。试验结果表明,圆形截面的内嵌H型钢钢管混凝土柱在纯扭荷载作用下其受力性能与方形截面相比更具优势,并提出了在工程实际使用这种新型结构的基本建议。Steel Reinforced Concrete-filled Steel Tubular(SRCFST)columns have been widely promoted be-cause of their good mechanical performance.In this paper,three SRCFST columns with inner H-section steel were tested under pure torsion through a self-designed test setup.By varying cross-sectional profiles of steel tubes,both the circular and the square columns were considered.The failure mode of columns under pure tor-sion test was investigated and the mechanical behaviors include the torque-torsional angle hysteresis relation,the skeleton curve,the stiffness degradation and the effect of slenderness ratios were analyzed.The results show that the behavior of circular SRCFST columns with inner H-section steel is better than that of the square counterpart under pure torsion and the preliminary application suggestions for this novel member are put forward.

关 键 词：内嵌H型钢 钢管混凝土 受力性能 纯扭试验 长细比 

分 类 号：TU398.9[建筑科学—结构工程]