Finite Element Simulation Of Aseismic Performance Of Steel Fiber Reinforced Concrete Frame Joints

Steel fiber concrete which is in rapid development recently at home and abroad,is a kind of new composite material by mixing defined amount of steel fiber with general concrete.It has overcome many disadvantages of concrete,such as its low tensile strength,small limit elongation,low impact toughness and poor durability and equipped with such performances as good tensile,bending,shear,resistance,resistance to fatigue crack and high toughness.Therefore,it has been widely used in construction,roads and bridges and irrigation works.Nodes are not only hubs of power transmission to frame beam-column,but also the weak links of frames.Several violent earthquakes which happened at home and abroad have demonstrated that many steel concrete frame nodes were damaged to different degrees under the earthquake condition.So,the seismic problems of nodes have drawn great attention of engineering industry.The research and application of steel fiber concrete in high-rise buildings make people realize its great advantages,especially in recent years.This paper elaborates systematically the basic theories of steel fiber concrete and discusses its application in frame nodes.It concludes that the frame nodes with steel fiber and concrete as matrix can improve the crack resistance property of core zones by analyzing and doing simulation research of the seismic performance finite elements of steel fiber concrete frame nodes.Under normal conditions of girder reinforcement ratio,less reinforcement in nodes can benefit construction and bring good economic benefit as well.