摘要
为了研究新型十字型轻钢混凝土组合异形柱的受压力学性能,本文首先对其开展了轴心受压试验,试验发现十字型组合柱的破坏形式主要为弯曲破坏,轴压承载力高,变形能力良好。基于试验结果建立了精细化有限元模型,并进行了数值化模拟分析。然后,将有限元分析结果和试验测试结果进行对比,两者吻合较好,验证了所建立有限元模型的正确性。最后,采用经过验证的有限元计算模型,进行了混凝土强度、型钢厚度、偏心率以及长细比四个参数对组合柱受压性能的影响分析。结果表明:试件承载力和初始刚度随偏心率的增加而降低,随混凝土强度和型钢厚度的增加而增大,但对刚度的提升效果不显著且增幅不断缩小。十字型组合柱的变形能力主要受长细比的影响较大,试件延性和极限承载力随长细比的增加而降低。
In order to investigate the compressive performance of a new type of cross shaped light steel concrete composite irregular column,this paper first conducted an axial compression test on it.The test results showed that the failure mode of the cross shaped composite column was mainly bending failure,with high axial compression bearing capacity and good deformation ability.A refined finite element model was established based on experimental results,and numerical simulation analysis was conducted.Then,the finite element analysis results were compared with the experimental test results,and the two were in good agreement,which which verified the correctness of the established finite element model.Finally,the validated finite element calculation model was used to analyze the influences of four parameters,namely concrete strength,steel plate thickness,eccentricity,and aspect ratio,on the compressive performance of composite columns.The results indicate that the bearing capacity and initial stiffness of the specimen decrease with increasing eccentricity,while they increase with increment of concrete strength and steel plate thickness.However,the enhancement effect on stiffness is not significant and shows diminishing increments.The deformation capacity of cross shaped composite columns is mainly affected by the aspect ratio,and the ductility and ultimate bearing capacity of the specimens decrease with the increase of aspect ratio.
作者
马萌洋
杨志
乔文涛
张国文
李义强
MA Mengyang;YANG Zhi;QIAO Wentao;ZHANG Guowen;LI Yiqiang(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University),Ministry of Education,Shijiazhuang 050043,China)
出处
《结构工程师》
2025年第3期127-135,共9页
Structural Engineers
基金
河北省杰出青年科学基金项目(E2022210084)。
关键词
装配式建筑
轻钢混凝土组合结构
十字型异形柱
受压性能
prefabricated building
light steel concrete composite structure
cross shaped column
compression mechanical property
