부산대학교 도서관

To evaluate the eff ectiveness of the asymmetrical steel beam section and reduced beam section (RBS), this paper presents a parametric study on weak-axis beam-to-column composite connections with asymmetrical reduced beam section subjected to horizontal cyclic loading. After validating the accuracy of the fi nite element modeling through comparing to the experimental results, a total of 29 refi ned tridimensional models for four series were created for parametric analysis. The load–displacement and moment–rotation relationships, the Mises index, triaxiality index and rupture index distribution across the width of the fl ange welds for each connection were reported. A smaller steel beam top and bottom fl ange width ratio α could alleviate the adverse eff ect of the composite action. The parametric analysis about the geometrical variables of RBS confi rms the need for readjustment of the geometrical characteristics of the RBS in order to apply to the proposed weak-axis profi les. For design purposes, the parameter a , the distance from the skin plate to the reduced region, can be set to (0.65–0.9) b bf ; the parameter b , the length of the reduced region, can be set to b = (0.65–0.90) d b ; the parameter c , the maximum reduction depth of beam bottom fl ange, can be set to 0.20 b bf , where b bf and d b are the beam bottom fl ange width and beam depth respectively.