| Title |
Beam-Column Connection with 1200mm Deep Multi-Reduced Taper Beam for Intermediate Moment Frame |
| Authors |
Jung, Si-Hwa ; Alemayehe, Robel Wondimu ; Park, Man-Woo ; Ju, Young-Kyu |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.4.135 |
| Keywords |
Multi-Reduced Taper Beam ; Deep Beam ; Beam-Column Connection ; Intermediate Moment Frame ; Cyclic Load Test |
| Abstract |
Deep beam has high section modules compared with shallow beam of the same weight. However, deep beam has low rotational capacity and high possibility of brittle failure so it is not possible to apply deep beams with a long span to intermediate moment frames, which should exhibit a ductility of 0.02rad of a story drift angle of steel moment frames. Accordingly, KBC and AISC limit the beam depth for intermediate and special moment frame to 750mm and 920mm respectively. The purpose of this paper is to improve the seismic performance of intermediate moment frame with 1200mm depth beam. In order to enhance vulnerability of plastic deformation capacity of deeper beam, Multi-Reduced Taper Beam(MRTB) shape that thickness of beam flange is reinforced and at the same time some part of the beam flange width is weakened are proposed. Based on concept of multiple plastic hinge, MRTB is intended to satisfy the rotation requirement for intermediate moment frame by dividing total story drift into each hinge and to prevent the collapse of the main members by inducing local buckling and fracture at the plastic hinge location far away from connection. The seismic performance of MRTB is evaluated by cyclic load test with conventional connections type WUF-W, RBS and Haunch. Some of the proposed MRTB connection satisfies connection requirements for intermediate moment frame and shows improved the seismic performance compared to conventional connections. |