Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints
Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints
复制标题
新型消能预制梁柱节点试验研究
DOI：
10.1155/2019/8151087
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发表时间：
2019-12
影响因子：
1.8
通讯作者：
Fanjin Zeng
中科院分区：
文献类型：
--
作者：
Qiong Liu;Shanghong Chen;Wei LIN;Fanjin Zeng
本文设计了一种新型的端部缺口梁柱节点。其装配连接区域从接头内部变化到梁的跨中。该节点不仅能保证结构的整体性，而且能保证塑性铰远离柱边。塑性铰的转动能力决定了节点的内力重分布和耗能能力。采用高强螺栓和钢板连接，进一步增强塑性铰的转动，减少现浇混凝土体积。三个足尺外部梁柱节点铸造，然后进行反复循环荷载。通过有限元分析，与试验结果进行对比，研究了连接位置对结构性能的影响。结果表明，三种试件的塑性铰均首先发展到距柱边一定距离处，从而揭示了这种节点能够实现梁铰机制，防止节点剪切破坏。当与塑性铰区重合时，连接位置最为不利，会导致钢筋锚体系变形过大而过早失效。这种新型节点在设计合理的情况下，在地震作用下具有良好的抗震性能，可以应用于地震区的实际工程结构中。
A new dapped-end beam to column connection is designed in this paper. Its assembly connection zone changes from inside the joint to midspan of the beam. The proposed connection can not only provide good structural integrity but also ensure that the plastic hinge moves away from the column edge. The rotational capacity of the plastic hinge determines the internal force redistribution of the joint and the energy dissipation capacity. The high-strength bolts and steel plates are used to realize connection, further enhancing the rotation of the plastic hinge and minimizing the cast-in-place concrete volume. Three full-scale exterior beam to column joints are casted and then subjected to reversal cyclic loading. The finite element (FE) analyses are carried out to compare with experimental results and study the effect of connection position on the structural behaviours. The obtained results show that the plastic hinges of all three specimens are firstly developed to a distance from the column edge, thus revealing that this kind of joint can achieve beam hinge mechanism and prevent joint shear failure. And the connection position is the most disadvantaged when coinciding with the plastic hinge zone, which would result in the excessive deformation and the early failure of the steel bar anchor system. The new type of joint shows good seismic performance during earthquake if the connection can be properly designed, and thus this kind of structural form can be applied to actual engineering structures in seismic regions.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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