Experimental study of a novel precast prestressed reinforced concrete beam-to-column joint
Experimental study of a novel precast prestressed reinforced concrete beam-to-column joint
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DOI：
10.1016/j.engstruct.2017.11.011
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发表时间：
2018-02
影响因子：
5.5
通讯作者：
Hai-shen Wang;E. Marino;P. Pan;Han Liu;X. Nie
中科院分区：
文献类型：
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作者：
Hai-shen Wang;E. Marino;P. Pan;Han Liu;X. Nie
预制钢筋混凝土（r.c.）结构可以提供优于其现场浇注对应物的重要优点。然而，从过去的地震中吸取的教训表明，梁柱节点可能是这些结构的关键点，如果设计不当，可能会破坏抗震性能。本文介绍了一种新型预应力预制钢筋混凝土结构。梁柱接头靠近柱的梁端采用钢套加固，以防止混凝土剥落。钢绞线用于提供具有自定心能力的接头。可更换的低碳钢钢筋提供了节点的耗能能力。建议的联合的有效性进行了研究，通过实验测试。试验结果表明，该节点具有良好的承载力和变形能力，能有效控制层间位移，便于维修，并能防止梁柱的损伤。最后，与传统的现浇梁柱节点的比较指出了拟议的预制预应力节点的抗震性能的上级恢复力。
Precast reinforced concrete (r.c.) structures can provide important advantages over their cast-in-place counterpart. However, lessons learned by past earthquakes evidence that beam-to-column joints may be a critical point of these structure and can undermine the seismic performance if not properly conceived. This paper presents a novel prestressed precast r.c. beam-to-column joint. The beam ends adjacent to the column are reinforced by steel jacket to prevent concrete from spalling. Steel strands are used to provide the joint with self-centering capacity. Replaceable mild steel bars provide the joint with energy dissipation capacity. The effectiveness of the proposed joint is investigated by experimental tests. The obtained results demonstrate the good properties of the joint in terms of strength and deformation capacity, control of story drift, easy reparability, and preventing beams and columns from damage. Finally, the comparison with a conventional cast-in-place beam-to-column joint points out the superior resilience against earthquake of the proposed precast prestressed joint.