Abstract

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Title:: Analysis on Seismic Behavior of H-type Beam Flange Double Rib Reinforced Weak Axis Connection

Author(s):: LU Lin-feng; LIN Jian-jun; HU Ben-feng; School of Civil Engineering, Chang’an University

Keywords:: box node domain; weak axis connection; skeleton curve; seismic behavior

Abstract:: A kind of H-type beam flange double rib reinforced weak axis connection suitable for box node domain of I-section column was presented. The mechanical behaviors of seven full-scale calculation models, including standard joints, double rib reinforced connections internal and external of beam flange, were analyzed using ABAQUS finite element software. The failure patterns, hysteretic characteristics, skeleton curves, energy dissipation capacity, plastic rotation ability and ductility of connections were studied. The results show that the plastic hinge at beam end can be effectively formed by double rib reinforced weak axis connection of box node domain, and the plastic hinge is away from the core area. The seismic principle of strong column weak beam and strong node weak component is achieved. The same seismic behavior of double rib reinforced connections internal and external of beam flange can be obtained, and the stress of beam and column flange butt welding is improved. The dissipation capacity and ductility coefficient of beam flange double rib reinforced connection are improved significantly, and the plastic rotation ability can reach 0.03 rad proposed by FEMA-267 and meet the international requirements.