Experimental Research On Hysteretic Behavior Of Stepped T-type Rhs Joints Under Bending Moment

Hollow Section Structures (HSS) are widely applied in construction projects fortheir advantages such as pleasing appearance,easy to process,convenient to construct,light weight and superior mechanical property. As the widely application of steel tubularstructure, the research of the steel tubular joints gets to be more in-deep.So far, theresearch on static behavior of the steel tubular joints are being perfected.Thecorresponding calculation theories and design formulas have been widely used inpractical engineering. But the research on the seismic behavior of steel tubular joints isstill less,our country is an earthquake-prone country,it’s necessary to conduct in-deepstudy on the seismic behavior of steel tubular joints. In this thesis,the hystereticbehavior of T-type rectangular hollow section (RHS) joints under In-plane bendingmoment were analyzed by quasi-static experimental and finite element (FE) methods.The details of this thesis are presented as follows:（1）A basic model was built by finite element (FE) method：By comparingthe influence of different modeling factors on the result of simulation calculations, ainitial feasible finite element model was established. Compared the simulated data withthe existing experimental data,we can verified that using the finite element methodto simulate the behavior of the steel tubular joints is feasible.Then,by calculatingtwelve finite element model of the tubular joints, the influence of different parameterson the static and hysteretic performance of the steel tubular joints wascomprehensive inspected.（2）The experimental study of T-type RR joints was conducted： Six T-type RRjoints were tested under quasi-static cyclic load. The experimental phenomenon wasrecorded in detail, the failure modes and failure law of the these joints were alsosummarized.（3）The experimental data was analyzed：By processing the experimental data，the results of the joints were evaluated, including hysteretic curve, skeleton curve,load-carrying capacity,deformation capacity, energy dissipation, stiffness decay and soon.The seismic performance and the influence of different parameters on the thesejoints were analyzed.（4）The tested joints were simulated and analyzed by finite element (FE)method：On the basis of the finite element results of the second chapter,a more accuratemodel of the tested joints was established. By calculating and contrasting,we canconfirm that using the finite element method to simulate the behavior of the steel tubular joints is feasible and dependable.