Research On Torsional Stiffness And Deformation Of SRC Members Subjected To Combined Torsion

With the urbanization process carrying forward in China,there has been more and more super high-rise and large span structures.Because steel reinforced concrete structure have high carrying capacity,good seismic performance and good economics,it is used in large-span structure more and more widely.The Kobe earthquake and the devastating earthquake in Iran let us know that the impact of reversing on the building is greater than bending effects.The Engineering structure is generally in a state of combined torsion,but rarely in a state of pure torsion stress.The paper,combining the numerical simulation analysis and experimental analysis,deeply inquiry SRC members’ principle of torsional stiffness and its calculation methods in compression,bending,shear,torsion.This paper will explore from the following aspects the SRC members’ torsional stiffness and deformation under combined torsion.(1)Numerical simulation analysis of 11 web SRC members and 6 lattice type SRC members,combined T-Q curves and stress cloud analysis,exploring the situation of force of steel reinforced concrete structures.(2)Based on the analysis on three groups of steel reinforced concrete column under combined torsion,including 11 web SRC members and six lattice SRC members,the paper focus on analysis of various parameters’ influence on torsional stiffness.(3)Based on the numerical simulation analysis and experimental analysis’ conclusions,the formula for the torsional stiffness and deformation of SRC member under combined force has been given.