Seismic Preformance Of Steel Reinforced Concrete Columns Under The Compound Torsion Analysis

Steel reinforced concrete structure is widely used by engineering and the rapiddevelopment of the new type of structural after the steel structure and reinforcedconcrete structure. It combines the advantages of steel structure and reinforced concretestructure. Steel and concrete give full play to the performance of the two materials. Butthe current work on the study of steel reinforced concrete structure are still laggingbehind the engineering construction. There are still many of the key scientific andtechnical issues to be resolved. For example, studies the behavior of twisted steel in theconcrete complex stress state. In structure, the member is in a situation bending shearand torsion interaction is very large, especially under earthquake, the building complextorsion is an important factor in earthquake damage.At present,there are two relevant norms of SRC in China formulated:" reinforcedconcrete structure design procedures "(YB9082-97) and " Technical Specification forsteel reinforced concrete structures in combination "(JGJ138-2001). But there is noclear correlation formula proposed by the twisted steel concrete composite members.Therefore, the study carried out by the force of steel reinforced concrete compositemembers is very urgent.The main content of this paper is to study the seismic performance of steelreinforced concrete under torsion in complex stress state.This paper studied thefollowing aspects:(1) The object of this paper is the H-type steel reinforced concrete columnmembers. Analysis of the complex mechanical behaviors of steel reinforcedconcrete column members using ANSYS.Make sure cell type and material propertiesanalysis software when taken to clarify the analysis of specific steps, For future analysisusing ANSYS software simulation of concrete torsion beam has a certain referencevalue.(2) For the finite element analysis in torsion of the SRC, the role of bond slipbetween steel and concrete is a problem. Based on the analysis, the model added to thebond-slip unit, Not only It can improve the accuracy of the finite element analysis, but also provide a reference for the study of concrete steel torsion bond-slip.(3) Studing13SRC members and a reinforced concrete members in compression,bending, shear, torsion low cycle complex stress state under repeated loading test. Fromthe axial compression ratio, concrete strength grade, stirrup spacing, the size of the steel,shear span ratio and torque Angle, analysis of steel reinforced concrete columnhysteretic characteristic, skeleton curves, energy dissipation capacity.