Cyclic Testing and Finite Element Analysis of Reduced Beam Section Connections of Steel Frame
The reduced beam section (RBS) connection is becoming popular after the 1994 Northridge earthquake,and it is one of the typical forms to move plastic hinge outward from the beam and column interface.Six specimens under cyclic loading were tested to investigate their hysteretic behavior.Five of these specimens were reduced beam section connections.In addition,one specimen with full welded connection was tested to compare their cyclic behaviors.Based on the experiments,three-dimensional finite element models were used to analyze the mechanical properties of these two types of connections using ANSYS.Based on appropriate finite element types,finite element analyses were conducted under cyclic loading.Failure mode,ultimate load,plastic rotation angles,ductility and ability of energy dissipation of the connections with different reduced parameters were investigated.The hysteretic curves and local failure modes? by finite element analyses show good agreement with those of the experiments.Experimental and analytical results indicate that an expanded plastic hinge could come into being and spread in reduced region of the beam to avoid premature brittle fracture near butt weld for high stress.Reduced beam section connections have better ability of energy dissipation than ordinary connections,so the RBS connection is an ideal ductility connection.Research also shows only good weld quality can make full use of the ability of energy dissipation of RBS connections.
steel frames reduced beam section connection anti-seismic performance experiment finite element analysis plastic hinge hysteresis curve
郁有升 王燕 楚枫 刘伟学
国内会议
上海
英文
222-232
2009-11-13（万方平台首次上网日期，不代表论文的发表时间）