Exterior reinforced concrete beam column joint subjected to monotonic loading
Exterior reinforced concrete beam column joint subjected to monotonic loading
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受单调荷载作用的外部钢筋混凝土梁柱节点
DOI：
10.1016/j.aej.2018.10.015
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发表时间：
2018
影响因子：
6.8
通讯作者：
Allam S
中科院分区：
文献类型：
--
作者：
Allam S
梁柱节点是钢筋混凝土框架中的关键部位.这种节点的性能极大地影响了整个框架的强度和延性。本文利用有限元软件ABAQUS对单调荷载作用下钢筋混凝土梁柱节点的三维数值模型进行了分析。分析中考虑了混凝土和钢筋材料的非线性，以及钢筋与周围混凝土的粘结特性。对30个节点模型进行了参数研究，以考察混凝土强度、柱轴向荷载、节点箍筋和梁顶钢筋形状对梁端荷载和位移能力的影响。所研究的模型的具体尺寸和钢筋的选择，以确保节点失效的发生。研究表明，梁端极限承载力随混凝土强度、柱轴力和节点箍筋的增加而显著增加。L形梁顶钢筋节点的性能与U形梁顶钢筋节点相似。梁顶配筋采用直筋显著降低了梁端极限荷载。
The joints between beams and columns are crucial zones in a reinforced concrete moment resisting frame. The behaviour of such joints greatly influences the strength and ductility of the overall frame. In this research, analysis of three-dimensional numerical models of exterior reinforced concrete beam-column joints under monotonic loading was performed using the finite element ABAQUS package. Concrete and reinforcing steel material nonlinearities, as well as bond characteristics between reinforcing bars and surrounding concrete were considered in the analysis. A parametric study involving thirty joint models was conducted to examine the influence of concrete strength, column axial load, joint stirrups and shape of the beam top reinforcement on the beam tip load and displacement capacities. The concrete dimensions and reinforcement of the studied models were chosen to ensure the occurrence of joint failure. The study showed that the beam tip ultimate load significantly increased as the concrete strength, column axial load and joint stirrups were increased. Joints with L-shaped beam top reinforcing bars exhibited similar performance to those with U-shaped bars. The use of straight bars for beam top reinforcement significantly reduced the beam tip ultimate load.
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