Hysteresis Analysis And Curve Of Skeleton Of The Cellular Steel Beam

Cellular steel beam (web perforation) is a kind of new steel members with reasonable section form, great flexural rigidity, high bearing capacity and remarkable economic benefit. Our states have lots of the research on capacity and stability while the research on the analysis of hysteresis is seldom. Based on the previous researches, hysteretic and failure mode under cyclic loading systemically by the large general finite software-ANSYS in this paper.(1) Introduced fabrication process of cellular steel beam. The physical relationship of models and prototypes can be obtained by similar rate.(2) Cellular steel beam under cyclic span concentrated load,two concentrated load across the beam and uniformly distributed load across the whole beam, when the cross-height rate of cellular beam equal 10,12,14,16,18, Hysteresis curves and skeleton curves are discussed Through analysis of the initial stiffness index, opacity indicators, the displacement ductility index and the energy dissipation coefficient index , it was proved that when the span depth ratio D = 14, The hysteresis curve is full, ductility factor and energy coefficient is maximum,It has better energy dissipation capacity. With The increases of the cross-height rate, the carrying capacity and the initial stiffness of cellular steel beam are decreased.(3)Cellular steel beam under cyclic span concentrated load, two concentrated load across the beam and uniformly distributed load across the whole beam, the distribution of von misses stress is researched. Its failure mode with different cross-height radio under different cyclic loading is discussed. It is proved that when cross-height rate of cellular steel beam is 14, the mechanical behavior is best. When edge of the round is plastic the round-castellated beam is damaged.