高强箍筋约束高强混凝土短柱受剪承载力试验的研究.pdf

Static Elastoplastic Analysis of Reinforced Concrete Deep BeamsInfilledTall SteelFrameA Dissertation Submitted for the Degree of MasterCandidate:Yang XinzhuoSupervisor:Prof. Zheng HongChang’an University, Xi’an, ChinaI摘要钢框架、钢框架内填剪力墙反映了框架结构刚度变化的两个端点值,刚度增幅是突变性质的。而钢筋混凝土深梁填充钢框架结构体系可以满足两个端点刚度值之间的要求,能够实现宽范围的刚度渐变调幅。高层钢框架内填钢筋混凝土深梁能够有效限制结构的侧向位移,提高结构承载力,通过改变内填深梁的尺寸,可以实现结构不同性能的抗震设计,且钢筋混凝土深梁采用装配式,有连接方便、可预制、震后易拆卸等优点,既可用于新建结构,又可用于结构加固,具有很高的理论研究价值和广阔的应用前景。目前,国外对钢筋混凝土深梁填充钢框架结构的研究刚刚起步,国内的研究尚属空白。本文采用低周反复加载的试验方法,对纯钢框架及内填不同高宽比钢筋混凝土深梁的钢框架进行试验研究。通过分析各构件的滞回曲线、骨架曲线、应力分布规律、变形特征、延性系数以及能量耗散系数,得出内填不同高宽比的钢筋混凝土深梁对钢框架滞回性能的影响。然后建立钢框架内填混凝土深梁的塑性破坏机构模型,给出了极限承载力的计算公式。本文运用静力分析方法,推导出结构弹性阶段构件的内力及结构位移计算公式,并利用ABAQUS有限元分析软件建立试验构件模型,与试验骨架曲线进行对比,找到合理的模拟方法,并运用该种模拟方法对高层钢框架内填不同尺寸深梁的受力性能进行分析对比。关键词:钢筋混凝土深梁、高层钢框架、静力分析IIAbstractSteel frame and shear wall infilled steel frame reflect two endpoints of the amplitude of the structural stiffness. The increase of stiffness is transilient. Reinforced concrete deep beamsinfilled steel framecan meet the required stiffness between the two endpoints and can adjust the structual stiffness within a wide steel frame’slateral displacementcan be effectiffvely limited and ultimate bearing capacitywill be improved by filleding with reinforced concrete deep the structure can meet the seismic design of performance-based by changing infilled deep beams’, reinforced concretedeep beams uses the assemblytype,soit can beconnected easily,beprefabricated and be repaired after structurecan applied to both new buildings and the reinforcement of established buildings. Thus it shows great theoretical research value and broad application present, the research of reinforced concretedeep beaminfilled steel frame abroad is at the very initial stage. In China, this research is nearly blank. In this paper, low-cycleloading testmethod is employed to study on the experiment of pure ste