Seismic Behavior of Steel Beam to Box Column Connections Strengthened with Rib Plate
|關鍵字:||箱型柱梁柱接頭;肋板補強;背墊板;扇形開孔;韌性;box column connection;rib;weld access hole;ductility|
Box columns and H beams are widely used in the steel frame buildings in Taiwan. The unexpected failure occurred in those conventional connections, described in the literature, initiated from the complete joint penetration (CJP) weld, weld access hole, and at the tips of the beam flange. This study is focused on investigating analytically and experimentally the behavior of the H beam to box column connections strengthened with vertical rib plates. An experiment was carried out to study the behavior of three full scale H beam to box column connections. The connections were reinforced with lengthened rib plate to the box column flange and the beam flange along the centerline of the beam flanges. Test results showed that the reinforced rib plate can reduce the stress concentration occurred at CJP weld and weld access hole. However, minor cracks were inspected in CJP weld at the tips of beam flanges. The connections strengthened with rib plate can develop excellent ultimate strength and moment-plastic rotation behavior.
|Appears in Collections:||Thesis|