The Behavior Study Of Joints Between Steel Beams And Core Steel Reinforced Concrete Columns Under Cyclic Loading

Core steel reinforced concrete structure will be widely used in high dwelling house and multi-stories office building, because a little profiled bar is inserted into the section of reinforced concrete, the section size of column would be diminished effectively, the shear carrying capacity and the deformation capacity will be improved. It is valuable to study the performance of the core steel reinforced concrete column-beam joint under low reversed cyclic loading for perfect design of core steel reinforced concrete structure.The core steel reinforced concrete column-steel beam joint which is widely used in project is adopted in this study. The mechanical process analysis,the deformation capacity analysis and the energy dissipating analysis under low reversed cyclic loading are discussed by elasticity-plasticity finite element theory.The results indicate the deformation capacity is improved by inserting profiled bar into the core of the column. The deformation capacity and the energy dissipating is improved in a certain extent by increasing strength classes of concrete in a certain range. The joint crack resistance, rigidity and load-carrying capacity is improved obviously under axial compressive force; with the ratio of axial compressive force increasing, the deformation capacity and the energy dissipating of joint is improved in a small range in low ratio of axial compressive force. With the increasing of the volume ratio of the shaped-steel the strength and rigidity of the component is increased gradually, the deformation capacity and the energy dissipating is weakened a little. The conclusions are consistent with the conclusion of correlative experimentation, it will be reference value for the scientific design of the Core steel reinforced concrete structure.