Studies On Seismic Behaviors And Bearing Capacity Of SRC Columns Subjected To Biaxial Loading

Steel reinforced concrete (SRC) composite structure is a kind of commonly usedcurrent high-rise building structure system, which has a high bearing capacity, largerigidity and good seismic performance, compared with traditional steel and concretestructures, Steel reinforced concrete structure showed better performance advantagesand prospects for development. At present both at home and abroad, only unidirectionalhorizontal seismic action has done many studies. Coupling effects of the bi-directionallevel earthquake seismic response and seismic performance, although carried out someresearch, but the depth and breadth of the research content is still in the primary stage ofthe urgent need to carry out more in-depth research.Firstly, the use of finite element software ABAQUS simulation on the the8experiments SRC column aims to verify the ABAQUS finite element software SRC’sability to simulate the uniaxial low reversed cyclic loads, as well as testing the validityof the modeling. Furthermore, simulate the SRC columns subjected to biaxial lowreversed cyclic loads, the loading paths, cycle times of displacement amplitude andamplitude increment of displacement were all considered as analysis parameter tosimulate and analyse seismic performance of the SRC columns, such as the yield load,peak load, displacement ductility ratio and hysteretic energy dissipation, study on steeland reinforced process yield and broken ring, broken ring forms, analysis biaxialloading pathsaxial compression ratio, the displacement amplitude of cycles and theeffect of displacement amplitude increments on its broken ring shape. Through in-depthcomparison of the domestic existing regulations computing method about eccentriccompression column, confirm the curves of relationship between N-M, research thedifference of bi-eccentric compression column in the current specifications of computing, summarize the results of previous studies, after the statistical analysisproposed a kind of SRC column bearing capacity of practical calculation formula underbi-eccentric. By calculation, the use this article to the formula calculation results withthe experimental ratio of1.00, the mean square error of0.02, the coefficient of variationof0.14, Instructions in good agreement with the experimental results, and verify theformula Scope, and found that the corrected formula can be used to calculate the normalsection bearing capacity of SRC columns which equipped I type steel, subjectd tobi-eccentric compression.