Seismic behavior and design of steel moment connections reinforced by single ribs with extension
|關鍵字:||梁柱接頭;單肋板;實尺寸試驗;塑性鉸;韌性;beam-to-column connection;rib;full-scale test;plastic hinge;ductility|
Improved connections are extensively developed after Northridge and Kobe earthquakes. However, few researchers focused on the study of vertical rib-reinforced connections. In this research, an innovative rib beam-to-column connection was investigated by studying rib design parameters and conducting full-scale tests to prove its benefit and ductility. The connection used in this research is called the SRE (Single Rib with Extension) one. It is characterized by welding two single vertical ribs, each elongated with a tail-like extension, to the beam flanges on the centerline of the beam flanges. The results of the parametric study demonstrated that, compared with pre-Northridge connections, the SRE connection could significantly decrease the stress at the weld-accessed hole and the complete joint penetration weld. The full-scale test results showed that four specimens all developed the yielding in the whole rib-reinforced zone, formed plastic hinge at a distance away from the column face, and demonstrated exceptionally ductility by achieving plastic rotation more than 0.03 radian and interstory drift angle more than 0.04 radian. The latter part of the thesis provides the designing procedure of the SRE connections that is concise and useful to the practice.
|Appears in Collections:||Thesis|