ANALYSIS ON MECHANICAL PROPERTIES OF PREFABRICATED BEAM-COLUMN-CORBEL COMBINED JOINTS
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摘要: 为提高构件的装配效率,提出了一种新型的工业结构装配式梁-柱-牛腿组合节点,即在混凝土柱牛腿上焊接钢筋,安装时插入梁上预留孔,梁柱间先用泡沫充填,外侧以环氧树脂密封,泡沫块与梁间用M7.5无收缩砂浆灌浆。通过ABAQUS有限元软件建立组合节点的模型并对其进行承载性能分析,研究边节点和中节点在循环荷载作用下的破坏模式、承载力、延性、耗能能力等性能。结果表明:该节点滞回曲线饱满,具有良好的延性和耗能能力;破坏主要发生在梁端,最终形成塑性铰,符合"强柱弱梁""强节点弱构件"的抗震设计原则。
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关键词:
- 梁-柱-牛腿组合节点 /
- 有限元分析 /
- 承载性能 /
- ABAQUS
Abstract: In order to improve the assembly efficiency of structure members, a new type of prefabricated beam-column-corbel combined joint in industrial structures was proposed. RC column corbels were welded with steel bars which would inserted into the reserved holes on beams during installation, and between the columns and beams, foam blocks were filled, which were sealed with epoxy, and grouted with M7.5 non-shrink mortar between epoxy blocks and beams. A finite element model of the combined joint was established by ABAQUS and simulations of mechanical properties was performed. The failure mode, bearing capacity, ductility and energy dissipation capacity were simulated. The results showed that the hysteretic curves of the joints were full and round that was to be of good ductility and energy dissipation capacity. Main failure occurred at the beam ends, in which the plastic hinge was formed finally, meeting to the design principles of "strong columns and weak beams"and "strong joints and weak members". -
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