竖向荷载作用下Z形柱中间层节点抗扭性能及有限元分析

发布时间：2018-09-10 07:12

【摘要】：Z形柱在框架结构住宅体系中已有广泛的运用,然而目前大多数研究只针对框架节点的抗震性能及抗剪性能的研究,对于节点的抗扭性能研究鲜有涉及。本文对钢筋混凝土Z形柱中间层框架节点的抗扭性能进行了研究,首先,通过竖向荷载作用下Z形柱中间层节点抗扭试验研究,探究了Z形柱框架中间层节点核心区的裂缝发展过程和破坏特征。其次,通过ABAQUS有限元软件建立分析模型,并将数值模拟结果与试验结果进行对比研究,验证数值计算结果与试验结果是否相吻合,确保有限元模型的可靠性。在此基础上,通过改变钢筋混凝土Z形截面柱框架节点箍筋间距、轴压比、混凝土强度、肢高肢厚比及纵筋配筋率等参数,分析钢筋混凝土Z形柱框架节点的抗扭性能与各参数的关系。得出主要结论：肢高肢厚比是影响节点抗扭承载力的重要因素,肢高肢厚比提高,节点抗扭承载力增强；梁纵筋配筋率对节点的极限扭矩影响较大。最后,对混凝土损伤塑性模型中各参数的选取进行了研究,研究指出膨胀角选择36。,粘滞系数选取0.001是合适的,从而确保本文研究的可靠性,同时也为后续研究提供参考。
[Abstract]:Z-shaped column has been widely used in frame structure residential system. However, most of the current studies only focus on the seismic performance and shear performance of the frame joints, and the torsional performance of the joints is seldom involved. The torsional test of Z-shaped column middle-story joints under load is carried out to study the crack development and failure characteristics of Z-shaped column frame middle-story joints. Secondly, the analysis model is established by ABAQUS finite element software, and the numerical simulation results are compared with the experimental results to verify whether the numerical results and the experimental results are in harmony. On this basis, the relationship between torsional behavior and parameters of reinforced concrete Z-shaped column frame joints is analyzed by changing stirrup spacing, axial compression ratio, concrete strength, limb height-limb thickness ratio and longitudinal reinforcement ratio. The ratio is an important factor affecting the torsional bearing capacity of the joints. The ratio of height to thickness of the joints increases and the torsional bearing capacity of the joints strengthens. So as to ensure the reliability of this research, and also provide reference for future research.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375
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本文编号：2233753