Analysis On Seismic Behavior Of Eccentrically Braced Forced Concrete Composite Frame Structure

The eccentrically braced reinforced concrete frame structure is composed of reinforced concrete frame and eccentrically steel brace, a new hybrid structural system,which has excellent lateral stiffness and energy dissipation capacity. The thesis applied finite element software in the seismic analysis of eccentrically braced steel concrete composite frame structure.The main work and research results of the thesis are as follows:(1) The thesis set out the eccentrically braced reinforced concrete frame structure with energy dissipation mechanism of energy dissipation of beam;(2) The thesis analyzed the Push-over of eccentrically braced steel concrete composite frame and Elasto-plastic time history analysis, giving the result that the order of the plastic hinge eccentrically braced reinforced concrete frame structure for the energy, and analyzed the aseismatic advantages of the eccentrically braced reinforced concrete frame structure;(3) Based on the static push-over analysis and elastic-plastic dynamic time-history analysis of energy beams, it came to the conclusion that the across base-height ratio and tensile reinforcement ratio of longitudinal reinforcement on earthquake resistance of structures have a greater impact. After the analysis of different cross-base-height ratio of beams and energy consumption of longitudinal reinforcement ratio for reinforced, the thesis got a suitable range of high energy beam, and the low reinforcement ratio of longitudinal reinforcement has good ductility and energy dissipation capacity of energy beam;(4) By calculation and analysis, the thesis concluded that the eccentrically braced steel concrete composite frame beam end connection and uses of energy in non-energy beams and columns with cross-frame support column for the end is the weak parts of the structure.