不同构造的轧制型材组合异形柱短柱轴压力学性能研究  

Mechanical Properties of Rolled-Steel Special-Shaped Short Composite Columns with Different Structural Forms Under Axial Compression

作　　者：刘洁 张泽宇 王月栋 陈志华[1] 王晓锋 LIU Jie;ZHANG Zeyu;WANG Yuedong;CHEN Zhihua;WANG Xiaofeng(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;National Steel Structure Engineering Technology Research Center,Beijing 100088,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]中冶建筑研究总院有限公司,北京100088 [3]国家钢结构工程技术研究中心,北京100088

出　　处：《工业建筑》2024年第8期87-95,共9页Industrial Construction

摘　　要：为研究轧制型材组合异形柱在轴向荷载作用下的受力性能,采用ABAQUS软件平台建立不同构造、是否填充混凝土的组合异形柱短柱试件有限元模型。基于现有试验结果验证了建模方法的准确性,揭示了其在轴压荷载作用下的承载性能、破坏模式和受力机理,并分析了不同构造、是否填充混凝土对其轴压性能的影响规律。研究结果表明,轧制型材组合异形柱均为整体受压破坏,伴随钢管局部屈曲破坏;填充混凝土后能够明显改善组合异形柱的破坏模式,提高承载力;纯H型钢组合试件采用封口板形成闭口截面后承载力提升显著。采用现有标准/规范对轧制型材组合异形柱的承载力进行计算,相对差值在11%以内,计算值与模拟值吻合较好,计算值能够较好预测轧制型材组合异形柱短柱的轴压承载力。The mechanical properties of short composite columns composed of rolled-steel special-shaped profiles under various structural forms and subject to axial compression were investigated.Numerical simulations were conducted by using the ABAQUS finite element software,focusing on rolled-steel special-shaped short composite columns with and without concrete.The accuracy of the modeling approach was corroborated by comparing with existing experimental results,thus establishing the finite element models of the short composite columns.The analysis uncovered the loadbearing performance,failure mode,and force mechanism of the composite columns under axial compression.Furthermore,it explored the effects of different structural forms and the presence or absence of concrete on the axial compressive properties.Findings indicated that all composite columns underwent a complete compression failure,which was accompanied by local buckling failure of steel tubes.The inclusion of concrete clearly ameliorated the failure mode of composite columns and enhanced the bearing capacity.However,the bearing capacity of pure H-steel composite columns improved significantly upon the formation of a closed section by sealing plates.Existing standards and codes were employed to compute the bearing capacity of the short composite columns.The relative difference between the calculated and simulated values was less than 11%,indicating a good agreement.Therefore,these calculated methods can be reliably used to predict the bearing capacity of rolled-steel special-shaped short composite columns under axial compression.

关 键 词：轧制型材组合异形柱 轴压力学性能 有限元模型 承载力计算 

分 类 号：TU391[建筑科学—结构工程]