交叉U型板连接的墙梁节点抗震性能试验研究

Seismic performance experiment analysis of wall-beam connection with crossed U-plate

为研究交叉U型板连接墙梁节点的抗震性能,设计2个节点试件进行低周往复荷载试验,将U型板板厚作为考察的参数,探讨此节点的破坏形态和抗震性能,以及节点域部位应变分布规律.结果表示:2个试件的延性系数均大于3.16,交叉U型板节点具有较强的抗震性能,U型板板厚对节点的承载力影响较大,板厚由8 mm变为12 mm,试件极限承载力增加了148.2%.U型板折弯处角部为薄弱部位,在实际应用中应重点加强.

In order to study the seismic performance of the cross U-plate connected wall and beam connection,two joint specimens were designed for low circumferential reciprocal load experiments,and the U-plate thickness was used as a parameter to consider the damage pattern and seismic performance of the joint,as well as the strain distribution regulation of the joint area.The results show that the ductility factors of both specimens are greater than 3.16.The crossed U-plate connection has excellent seismic performance and the thickness of the U-plate has a large influence on the bearing capacity of the joint.The ultimate bearing capacity of the specimen increased by 148.2%when the plate thickness changed from 8 mm to 12 mm.The corner of the U-plate bend is a weak area and should be strengthened in practice.