Seismic Performance Of Steel Fiber Reinforced Concrete Frame Side Joint

Reinforced Concrete has a major defect that is weak in tension strength and is very brittle. As the intensity increased, this feature is more obvious. If applied in complex stress areas such as beam-column joints, it is easy to crack, the shear capacity and seismic performance are very low. Compared with ordinary concrete structures, the shear capacity and seismic performance of steel fiber reinforced concrete have improved significantly. Therefore, considering the advantages of steel fiber reinforced concrete and high strength concrete, the performance research of steel fiber reinforced concrete frame joint have important theoretical and practical value.Through a test including steel fiber reinforced concrete frame joints under cyclic loading test. the author analyses that four experimental parameters' effect in specimens'mechanics capability and seismic capacity. The parameters are axial compression ratio, volume and mixing area of steel fiber, volume of the core area of stirrup. We also research if steel fiber replaces the feasibility of stirrups in the core area. The main contents are as follows:(1) The paper carries out a test including 5 frame joints under cyclic loading. The specimens are divided into 2 groups. We analyze the impact of axial load ratio, volume and mixing area of steel fiber, volume of the core area of stirrup on the crack,also study the failure mode.(2) According to the Hysteretic curve of frame side joint from the test, we analyze the energy dissipation capacity of each frame joint and parameter's effect on the seismic performance.(4) According to analyze components'stress, we discuss the nodes of cracking and shear mechanism, put forward the force mode on Steel Fiber Reinforced Concrete frame joints.