钢接头连接的装配式混凝土叠合梁-柱节点抗震性能试验

Experiment on seismic behavior of prefabricated concrete composite beam-column joint connected by steel

在国内外装配式节点研究的基础上,提出了一种钢接头连接的装配式混凝土叠合梁-柱节点,为研究其抗震性能进行了低周往复加载试验.试验结果表明:新型节点中预制梁的型钢接头和纵筋焊接能有效传递二者间的应力;叠合梁-柱节点具有较好的整体性;节点的塑性铰产生在梁的型钢接头和纵筋焊接部位附近,梁柱节点核心区域破坏较小;新型节点耗能能力较好;装配式节点比现浇节点有更高的承载力,但是延性更低.

Based on the existing researches regarding prefabricated joints conducted domestically and abroad,this study proposed a prefabricated concrete composite beamcolumn joint connected by steel.Low cycle repeated loading tests were conducted to study the seismic performance of the proposed joint.The experimental results show that the stress can be effectively transferred between the steel joint and longitudinal bar of the precast beam.Moreover,the composite beam-column joint has good integrity.The plastic hinge of the joint is located near the welded part of steel and longitudinal bars in the beam,and the damage inflicted on the core area of the beam-column joint is small.The novel joint exhibits good energy dissipation capacity.Compared with the cast-in-place joints,the proposed prefabricated joint has higher bearing capacity but lower ductility.