多工况荷载作用下内嵌H型钢钢管混凝土柱的受力性能  

Mechanical behavior of concrete-filled steel tubular columns embedded with H-shaped steel tubular under multi-load

作　　者：赵轩[1] 皮正波 陶修[1] 罗崯滔 聂影[1] 陈春君 王宇航[3] ZHAO Xuan;PI Zhengbo;TAO Xiu;LUO Yintao;NIE Ying;CHEN Chunjun;WANG Yuhang(CISDI Engineering Corporation,Chongqing 400013,P.R.China;Department of Building Engineering,Hunan Institute of Engineering,Xiangtan 411104,Hunan,P.R.China;College of Civil Engineering,Chongqing University,Chongqing 400045,P.R.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,湖南湘潭411104 [3]重庆大学土木工程学院,重庆400045

出　　处：《土木与环境工程学报（中英文）》2023年第6期74-82,共9页Journal of Civil and Environmental Engineering

基　　金：重庆市技术创新与应用发展专项(cstc2019jscx-gksbX0013)。

摘　　要：在简单钢管混凝土组合柱中内嵌H型钢,形成新型组合结构柱,为研究新型组合结构柱的受力性能,对其进行纯弯、压弯、扭弯、压弯扭4个工况的试验研究。为满足试验过程中的加载需要,设计制作了一套适用于多工况模拟的加载装置。在复杂荷载加载中,对于有轴压参与的工况,控制轴压比为0.24;对于有扭弯的工况,控制扭弯比为0.34。通过对4个试件的加载试验,分析其扭矩-扭转角滞回曲线、弯矩-位移滞回曲线、扭矩-扭转角骨架、弯矩-位移骨架、力学特征及刚度退化等指标,对结果及其产生机理进行分析。结果表明,在复杂荷载作用下,该新型组合结构柱受力性能良好。基于试验结果提出在工程实际中使用该新型结构柱的基本建议。In this paper,H-shaped steel is embedded in simple concrete-filled steel tubular composite columns to form a new type of composite structural columns.In order to study the mechanical behavior of the new composite structure columns,the experimental studies are carried out under four working conditions:pure bending,compression-bending,torsion-bending and compression-bending-torsion.In order to meet the loading needs during the test,a set of loading devices suitable for multi-working condition simulation is designed and made.In the loading of complex load,the axial compression ratio is 0.24 for the condition with axial compression,and the torsion-bending ratio is 0.34 for the condition with torsion.Through the loading tests of four specimens,the indexes such as torque-torsion angle hysteresis curve,moment-displacement hysteresis curve,torque-torsion angle skeleton,moment-displacement skeleton,mechanical characteristics and stiffness degradation are analyzed.The results and mechanism are analyzed in depth,and the results show that the mechanical performance is good under complex loads,and the basic suggestions for using this new structure in engineering practice are put forward.

关 键 词：钢管混凝土 复杂荷载 内嵌H型钢 受力性能 

分 类 号：TU398.9[建筑科学—结构工程]