钢筋混凝土十字形截面柱框架顶层中节点的抗震性能的有限元分析-港口、海岸与近海工程专业论文.docxVIP

中文摘要由于钢筋混凝土异形柱结构体系的优越性，使其在住宅建设中得到了广泛的 中文摘要 由于钢筋混凝土异形柱结构体系的优越性，使其在住宅建设中得到了广泛的 应用。 本文对六个在低周反复荷载作用下的足尺的异形柱框架顶层中节点进行有 限元分析，本文作者根据钢筋混凝土结构有限元基本理论，采用分离式模型，编 NT异形柱框架顶层中节点的非线性有限元分析程序，并在试验的基础上对钢筋 混凝土异形柱框架顶层中节点进行了单调荷载下的平面非线性有限元分析，在程 序中通过对实际试件翼缘中的箍筋和混凝土的处理得出了计算结果，并与试验结 果进行对比分析，验证了本文编制的程序是正确合理的，计算了各阶段节点的核 心剪力，本文分析了以下问题：节点的破坏机理、裂缝的开展过程、梁纵筋及节 点箍筋屈服乃至节点破坏的特征以及翼缘的宽度对节点的承载能力的影响等问 题，在异形柱结构中，翼缘的存在对顶层中节点的抗震性能的提高是有贡献的， 通过分析和有限元计算，文中得出了翼缘箍筋和翼缘混凝土参与节点核心区工作 的数学表达式，为今后一般不等肢柱节点抗震性能的分析计算奠定了基础。本论 文对实践中的钢筋混凝土异形柱框架顶层中节点的设计具有一定的参考价值。 关键词：低周反复荷载 异形柱 钢筋混凝土框架 梁柱节点 核心剪力 ABSTRACTDuring ABSTRACT During recent years．1ightweight frame wim special-shaped columns is widely used in dwelling buildings due to its superiorities． In this paper,the six full··scale interior beam··column joints at the top story of reinforced concrete frame with special—shaped columns under low cyclic reversals were analyzed by nonlinear finite element analytical method．The theory of plasticity in reinforced concrete was employed in compiling a nonlinear analytical program． The separate type model was used in this program，and the program is used to analyze interior beam—column joints at the top story of reinforced concrete frame with special—shaped columns．On the basis of the experiment，a nonlinear finite element analysis of the top story interior joints in reinforced concrete frame with“+”shaped columns under monotonic loading is discussed．The calculate result of the program Was gotten through using a special way to the binders and concrete in flange of the specimens．Contrast to the experimental data，the outcome of the program of this paper Was verified to be valid．The joints core shear on each key phrase was calculated through it．On the basis of the experiment data，the following problems have been analyzed：failure mechanism of the joints，expanding procedure of crack， yielding phrase，the character of the joints failure and the work on the joints carrying capacity by the breadth ofthe flange．In reinforced concrete frame with special