矩形管薄壁型钢混凝土柱力学性能研究  

Study on Mechanical Properties of Rectangular Thin-Walled Tube Reinforced Concrete Columns

作　　者：贾王龙 杨鹏博 赵子文 李文潇 方成 JIA Wanglong;YANG Pengbo;ZHAO Ziwen;LI Wenxiao;FANG Cheng(China 22MCC Group Corporation,Tangshan 064000,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中国二十二冶集团有限公司,唐山064000 [2]同济大学土木工程学院,上海200092

出　　处：《结构工程师》2024年第5期88-101,共14页Structural Engineers

基　　金：国家自然科学基金(52078359);上海市曙光计划。

摘　　要：在“库架合一”结构体系的应用背景下,进行了8根矩形管薄壁型钢混凝土柱的轴心受压试验,得到了柱试件的极限承载力、竖向荷载-位移曲线、跨中挠度曲线。在此基础上总结了柱子的破坏模式,分析结果表明,该柱破坏模式主要为截面极限承载力破坏,不同抗剪螺杆布置方式会导致不同的破坏模式。利用有限元计算方法对其破坏模式和荷载-位移曲线进行了分析,分析结果与试验结果吻合。进一步应力分析发现:抗剪螺杆变量下极限承载力出现差异的原因是不同抗剪螺杆布置导致混凝土发生不同形式的破坏,从而不同程度上削弱了混凝土的承载力。在综合对比各国设计规范基础上,给出了该类柱的轴向抗压承载力实用计算方法。With the application background of“warehouse-shelves integrative storage structural system”,axial loading tests on 8 thin-walled tube reinforced concrete columns were carried out,the bearing capacity,load-displacement curves and mid-span deflection curves were obtained,and the failure modes were summarized.The test results showed that the columns mainly failed in section damage,and different shear screw arrangements would lead to different damage modes.The failure mode and load-displacement curve were captured by numerical simulation,where a reasonable good agreement was observed between the predicted and tested results.It was concluded that the difference in ultimate bearing capacity was due to the various degrees of concrete weakening caused by different shear screw arrangements.Based on the comparison of design codes in various countries,a design formula for the predicting the bearing capacity was given.

关 键 词：薄壁型钢混凝土组合结构柱 轴压试验 有限元模拟 破坏模式 设计公式 

分 类 号：TU398.9[建筑科学—结构工程]