轴压荷载下装配式SCCT剪力墙钢板屈曲行为研究  

Research on buckling behavior of steel plate in prefabricated SCCT shear wall underaxial compression load

作　　者：庞瑞[1] 张健 王兴明 卫聪聪 PANG Rui;ZHANG Jian;WANG Xingming;WEI Congcong(College of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001

出　　处：《混凝土与水泥制品》2024年第7期76-82,共7页China Concrete and Cement Products

基　　金：国家自然科学基金资助项目(52278172);河南工业大学自科创新基金支持计划项目(2022ZKCJ05)。

摘　　要：为探究装配式SCCT剪力墙钢板屈曲机制及钢板屈曲对墙体轴压承载性能的影响,建立了考虑钢材初始缺陷的装配式SCCT剪力墙非线性数值分析模型,对模型受力机理及钢板临界屈曲应力进行了分析,并根据参数分析结果提出了钢板临界屈曲应力计算方法。结果表明:墙体承载力主要由管内混凝土承担,各部件间协同工作,应力及变形传递性能良好;当管外混凝土厚度大于20 mm、钢材初始缺陷低于1/1000时,二者对钢板临界屈曲应力影响可忽略不计;对于Q235和Q355常用钢,要求钢板不发生弹性屈曲的距厚比限值分别为44.9、36.6。In order to explore the buckling mechanism of steel plates in prefabricated SCCT shear walls and its impact on the axial compression bearing performance of the structure,nonlinear numerical analysis models of SCCT shear walls were established considering initial defects of steel plates.The force mechanism of the model and the critical buckling stress of the steel plate were analyzed,and a calculation method for the critical buckling stress of steel plates in SCCT shear walls was proposed based on parameter analysis.The results show that the bearing capacity of the wall is mainly borne by the concrete inside the steel tube,and the components of the wall work together,with good stress and deformation transmission performance.When the thickness of the concrete outside the steel tube is greater than 20 mm and the initial defect of the steel plate is less than 1/1000,the influence of both on the critical buckling stress of the steel plate can be ignored.For commonly used steel Q235 and Q355,the distance-thickness ratio limits that require the steel plate to not undergo elastic buckling are 44.9 and 36.6 respectively.

关 键 词：装配式SCCT剪力墙 承载机理 钢板临界屈曲 数值分析 距厚比限值 

分 类 号：TU398.9[建筑科学—结构工程]