梁端上腋板下盖板加强型节点抗震性能试验研究

Experimental study on seismic behavior of reinforced joints with axillary plate on the upper side and cover plate on the lower side

随着对震中钢结构梁柱节点破坏研究的逐步深入,国内外学者提出了多种节点的加强构造,提升了节点的抗震性能.但这些加强型节点在工程实践中存在仰焊、降低室内净空等诸多实际问题.因此,承接先前的科研成果,对一种新型加强型节点——梁端上腋板下盖板加强型节点进行了试验研究.通过对比其与普通栓焊节点、双侧盖板加强型节点及双侧加腋加强型节点在滞回曲线、骨架曲线、延性系数、等效黏滞阻尼系数等方面的差异,评估了新型节点的抗震性能.结果表明,梁端上腋板下盖板加强型节点具有较好的抗震性能,可用于工程实践.

With the increase of studies on beam-column joint failure in steel structure,scholars at home and abroad have proposed a variety of joint strengthening structures to improve the seismic performance of the joints. However,there are many practical problems in engineering practice,such as over-head position welding,reducing indoor clearance and so on. Therefore,in this paper,an experimental study is carried out on a new type of reinforced joint,which is strengthened by axillary plate on the upper side and cover plate on the lower side at the beam end. The seismic behavior of the new type joints is evaluated by comparing the hysteretic curve,skeleton curve,ductility coefficient and equivalent viscous damping coefficient with the common bolted joints,the reinforced joints with cover plates on both sides and the reinforced joints with axillary plates on both sides. The results show that the reinforced joints with axillary plate on the upper side and cover plate on the lower side at the end of beam have better seismic behavior and can be used in engineering practice.