The Finite Element Anlyse And Comparison On The Seismic Performance Of The Steel Framework Bean-to-column Joints

The steel framework is one of the most commonly used structural systems in modern constructions .Many bean-to-column rigid joints of steel frame appeared lots of brittle failure and the beams didn' t appear plastic deformation obviously or plastic deformation didn' t happen at all. In order to improve the seismic performance of steel bean-to-column joints, the researchers did many experimental researchs about steel bean-to-column joints,two style of steel bean-to-column joints can effectively improve seismic performance of bean-to-column joints which are dog-bone style connection joint and semi-rigid connections.The aim of the paper is to do finite element anlyse of performance of dog-bone style connection joint and semi-rigid connections based on the generalize of results.Compare with seismic performance of conventional steel bean-to-column joints, anlyses will be done of dog-bone style connection joint and semi-rigid connections.At the time the article did model anlysis how steel angles affect seismic performance of joints;the article generalized affected way and stage to seismic performance of joints which steel angle did.The article did experimental researchs and anlyses of weakening sizes of dog-bone style connection joint and compared affect generated by each weakening size to joints.Through the research work of the thesis, compared with conventional steel bean-to-column joints ,dog-bone style connection joint and semi-rigid connections have good ductility and hysteresis behavior , dog-bone style connection joint and semi-rigid connections can improve seismic performance of bean-to-column joints of The steel framework under earthquake load.