Seismic Performance Experimental Research On L Shaped Column Space Angle Joint

With the development of social economy and the construction technology, building structure tends to be flexible, and people often use new materials to increase the aesthetic effect and the safety factor of construction. With the increasing of people’s understanding, research and innovation about building structure, as a kind of light and energy-saving residential special-shaped columns structure system becomes more and more plentiful.The research and practice show that ordinary reinforced concrete (RC) special-shaped columns structure has some deficiency, such as insufficient bearing capacity, axial compression ratio limit is too low, the seismic performance is not ideal, the popularization and application in engineering practice of the structure is limited by those features.As early as in2007,our team has begun to research steel reinforced concrete (SRC) artifacts and steel reinforced concrete special-shaped column structure system, on the basis of existing research in our team, the experimental research is desigined to expande L shaped column structure system. The main research contents and results summarized as follows:(1) With steel form of the section, axial compression ratio, load Angle, wing as changing parameters, L shaped column space angle joint seismic performance tests have been carried out. Observing the failure process of each specimens and analyzing their seismic indicators, such as final failure pattern, load-displacement curves, skeleton curves, displacement ductility, interlayer lateral Angle, stiffness degradation law, energy dissipation and the damage evolution law;(2) Through simplifying actual model, calculating the structure of the beam line stiffness ratio, calculating the beam actual bending moment and the joint core actual shear, putting forward the joint core uniaxial shearing and crack bearing capacity formula;(3) Under the help of nonlinear finite element software ABAQUS6.10, part of the test specimens are simulated by finite element analysis, comparing the simulation results and experimental results, the feasibility of the numerical analysis is proved, and analysising some without considering parameters in the test in further, such as the strength of concrete, ratio of longitudinal reinforcement beam and depth of wing plate thickness.