The Study Of The Effect Of T-stub Semi-rigid Conneciton On Seismic Behavior Of Steel Frame

T-stub Beam-to-column Connection is a kind of node connection by using high-strength boltswhich is the largest stiffness connection in the semi-rigid connections. The seismic behavior of T steelsemi-rigid connection of steel frame is less in the domestic and foreign literature. This article funded bythe National Natural Science Foundation Project (50908022). In this paper, the experimental study ofT-stub semi-rigid beam-column connection is carried on and the results of the study is guided theoreticalanalysis, in order to study of the effect of T-stub semi-rigid connection on seismic behavior of steelframe.The uniaxial and cyclic loading experiment are carried on two groups of T-stub beam-column jointsspecimens, in order to obtain the seismic behavior of T-stub joints and how flange thickness effects onthe seismic behavior of joint. The theoretical modeling method of T-stub beam-column joints isdiscussed, based on the joint under loading process of IDARC program simulation. The experimentalresult show that T-stub beam-column joints , in which the hysteresis loops is plump and the ductility isgood; The limiting rotation angle is all exceeded that Euro code’regulations 0.03rad; It’s ductility,bearing and energy dissipation capacity increase along with the increasing of T-stub flange’s thickness;When stiffness of bolt is greater than stiffness of T-sub’flange, the ultimate bearing capacity of T-subshall be in accordance with of bolt. IDARC analysis show that use a gusset plate to simulate the T-stubsemi-rigid connections gets a higher accuracy; By adjusting the bottle of stiffness of gusset plate andyield moment can simulate the T-stub semi-rigid connections of different flange thickness.Gusset plate model is introduced into the steel frame structure, in older to established differentflange thickness and floor of the T-sub semi-rigid connection of steel frame byIDARC, In IDARC TheAbove steel frame is carried on Elasto-plastic time-history analysis through use of 56 seismic waves. Thetime-history analysis show that: 1、the thicker T steel flange of the steel frame structure is, the bigger theeffect of hysteretic energy is in the earthquake, but the structure damage is smaller than the thinner T steelflange structure in earthquake, which is made by the greater stiffness and carrying capacity .2、thedamage of low-level steel frame structure is less than that of the high-rise steel frame structure under theseismic wave. The influence of steel structure damage in high intensive seismic region is greater than thatin low-intensity area.3、the thickness of T steel flange has unconspicuous influence on the less than 3layer steel frame structure.4、the overall damage index of numerical expression of the different flangethickness of the T steel semi-rigid connection steel framework(less han10 layer) is reached underdifferent seismic waves.