Research Of The Energy Dissipation Of The RC+-shaped Nodes Configured With Different Yield Point Steel

+-shaped node is one of the important parts of the frame structure, its deformation performance affect seismic ability of the whole structure. This thesis intends to explore a seismic new ideas, that is, low yield point steel and high toughness of concrete components in the node configuration, through the deformation energy to improve the seismic capacity of the node components.According to the different steel yield point, it produced a sample of six nodes:two nodes of the third level, two reinforced nodes of the third level, two low yield point steel nodes. The same node are the ordinary reinforced concrete and concrete pouring of high toughness. Node will produce a good specimen cyclic loading tests, draw cross-shaped nodes in the pressure, bending moment, shear force under the action of the performance analysis and comparison of the ductility, energy dissipation capacity, bearing capacity degradation and stiffness degradation characteristics, test results showed that:(1)The limited bearing capacity and the ductility coefficient of positive and negative direction on average of High toughness concrete node component have improved more than ordinary concrete node component, Ductility coefficient of High toughness concrete node increased by28%. Configure low yield point and ultimate strength of steel nodes the size of a steel similar to but less than three bars; configure a three-level steel steel node configuration of nodes than the forward and reverse22%of the average ductility coefficient, the configuration of low yield Off than the node point configuration level steel steel ductility coefficient of26%nodes. Above show that the high toughness and low yield point of concrete to improve the ductility of steel played a significant role.(2) Into the elastic-plastic state, low yield point steel the configuration of the node lag circle area than level1steel and level3steel the configuration of the node, high toughness concrete members at various levels under control of the displacement in sluggish circle area than ordinary concrete component that low yield point steel, high toughness concrete capability of energy consumption is better.(3) Into the yield stage, low yield point of reinforced with its strength degradation and level nodes, a steel reinforced similar level to fast, and stiffness less than3reinforced.AB AQUS finite element program for nonlinear analysis of the node. Reinforced with plastic models, concrete damage plasticity model used by separate plastic model and its analysis, the calculated results and experimental results agree well.