部分包覆钢-混凝土组合墙轴压稳定性能研究  

Research on Axial Compression Stability of Partially Encased Composite Wall

作　　者：朱杰 朱浩川[2] 肖志斌 叶灵鹏 金振奋[2,3] Jie Zhu;Haochuan Zhu;Zhibin Xiao;Lingpeng Ye;Zhenfen Jin(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310028,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江大学建筑设计研究院有限公司,杭州310028 [3]浙江大学平衡建筑研究中心,杭州310028

出　　处：《钢结构（中英文）》2023年第6期12-21,共10页Steel Construction（Chinese & English）

摘　　要：部分包覆钢-混凝土组合墙(简称PEC墙)在装配式建筑领域具有广阔的应用前景,近年来在建筑结构中逐步推广应用,但其稳定性能方面的研究尚待完善。对PEC墙稳定性能展开研究,基于既有试验和有限元分析结果,考察计算长度、材料强度、主钢件钢板厚度、构件截面尺寸等参数对墙体稳定性能影响,提出PEC墙轴压稳定曲线计算公式,公式计算值与有限元结果吻合良好。采用有限元软件ABAQUS建立有限元分析模型,基于既有试验数据进行对比,验证模型准确性。之后,对PEC墙轴心受压稳定性能展开数值参数分析,考察构件各参数对其稳定性能的影响,包括:计算长度、材料强度、主钢件钢板厚度、构件截面尺寸等。参数分析过程采用控制变量法,逐个研究各参数对PEC墙体稳定性能的影响程度,总结受力特点及规律。基于组合结构的稳定理论,按组合截面中混凝土与主钢件的构成,综合确定组合截面的等效强度fEQ、等效弹性模量EEQ,并推导了PEC墙构件的正则化长细比λn。然后,基于有限元分析结果绘制PEC墙的轴压稳定曲线,将钢结构四类截面稳定曲线与PEC墙稳定曲线进行对比,总结规律,寻找适用于PEC墙构件稳定曲线的计算方法。最后,基于参数分析结果,总结各构件参数对PEC墙稳定曲线的影响,在PEC墙轴压稳定曲线的计算公式中引入关键构件参数作为控制变量,同时基于不同计算长度下构件破坏形态特点,提出了“三段式”PEC墙轴压稳定曲线计算公式。研究表明:1)构件计算长度l_(0)对PEC墙破坏形式有较大影响,随着l_(0)增加,构件破坏形态及其极限承载力由材料强度控制转变为整体稳定控制;2)PEC墙各构件参数中,主钢件翼缘厚度、构件截面厚度对稳定性能影响较为显著,材料强度、主钢件腹板厚度、构件截面高度等对稳定性能影响相对较小;3)国内外尚未颁布PEC墙体设计的相�Partially encased composite walls(PEC walls)have been widely used in the field of prefabricated buildings.In recent years,it has been gradually applied in building structures.However,the researches on the stability performance of PEC remain to be improved.In this paper,the stability performance of PEC wall under axial compression is studied.Based on the existing experiments,a finite element model is established.The influence of parameters such as calculation length,material strength,main steel section thickness and,section size of components on the wall stability is investigated,and the calculation formula of the PEC wall axial compression stability curve is proposed.The research shows that the calculated values of the formula are in good agreement with the finite element results.In this paper,the finite element software ABAQUS is used to establish a finite element analysis model,and the accuracy of the model is verified by existing experimental data.Then,this paper analyzes the the axial compression stability performance of PEC wall under parameters,and investigates the influence of different parameters on the stability performance of components,including calculated length,material strength,steel section thickness of the main steel parts,and the cross-sectional size of the components.The parameter analysis process adopts the control variable method to study the influence of each parameter on the stability performance of PEC wall,and summarize the mechanical characteristics and regulations.Then,based on the stability theory of the composite structure,the equivalent strength fEQ and equivalent elastic modulus EEQ of the composite section are comprehensively determined according to the composition of concrete and main steel parts in the composite section,and the regularized slenderness ratioλn of the PEC wall components is derived.Then,based on the results of finite element analysis,the axial stability curve of PEC wall is drawn,and the stability curves of four types of sections of steel structure are compared wit

关 键 词：部分包覆钢-混凝土组合墙 PEC墙 轴心受压 稳定性能 正则化长细比 

分 类 号：TU398.9[建筑科学—结构工程]