A Study On Flexural Behavior Of Bolt Connection In Rigid Steel Frame Beam

Beam-to-column connection with cantilever beam bolted-splicing in rigid steelframe is widely used in developed countries,which is the recommended connectiontype in our Technical Specification for Steel Structure of Tall Buildings and Code forSeismic Design of Buildings. This kind of connection has its cantilever beam weldedin workshop and beam spliced on-site using high-strength bolts, which have a betterenergy dissipation and plastic rotation capacity. Its design is traditionally doneaccording to equal-strength method and little research has ever been done on this kindof connection and its superiority has not been brought into practice． So the analysisof response and collapse mechanism from beam-to-column connections withcantilever beam splicing under seismic load is both significant and important intheoretical aspect and practice．The thesis firstly reviews the theory and design method of beam-to-columnconnection with cantilever beam bolted-splicing in rigid steel frame at both home andabroad. And it briefly introduces the theory and design method in the new TechnicalSpecification for Steel Structure of Tall Buildings. Then the thesis uses the ANSYSfinite element analysis software to simulate the test model by test data and gets thesimilar results，which prove the correctness of the finite element model.In this thesis, beam-to-column connection with cantilever beam bolted-splicingin rigid steel frame is designed by the method from the new Technical Specificationfor Steel Structure of Tall Buildings. Then through the computer modeling usingfinite element program with nonlinear taken into account, we prove that theconnection with cantilever beam bolted-splicing in rigid steel frame is always in theelastic stage and meet the requirements by the design. The thesis compares theperformance under forces of beam-to-column connection with cantilever beambolted-splicing which is designed using design method in the new TechnicalSpecification for Steel Structure of Tall Buildings, beam-to-column connection withcantilever beam bolted-splicing which is designed using equal-strength method andnon-beam splice connection. From above comparison some important conclusions aregiven out. Finally, through the analysis of the flexural property of node withdifferent parameters, we get the impact of corresponding parameters on the flexuralproperty of node.