Research On Mechanical Performance Of Src Cross-shaped Short-limb Shear Walls

In the 21 st century, people’s living standards continue to improve science and technology changes with each passing day lead to an leap improvement in housing quality,Prompted new materials and new technology constantly emerging, appeared many new structures, such as steel reinforced concrete short shear wall, which is widely used in high-rise residential.In the domestic cross section steel reinforced concrete short shear wall stress performance study of rare, so the cross short limb shear wall seismic performance and mechanical and enrich the theory to guide the engineering practice has the vital significance.This paper, by using the large general software ANSYS cross-shaped steel reinforced concrete short shear wall adopted entity modeling method for nonlinear finite element analysis,considering concrete strength grade, axial compression ratio, wall limb length-width ratio and section steel ratio on the properties of component force influence,finite element model is established for 13 specimens, the system analysis of the steel reinforced concrete cross-shaped section of short limb shear wall under cyclic loading is hysteretic performance,skeleton curve, stiffness degradation characteristics and the stress distribution of steel and concrete, etc.This paper expounds the structure under the effect of cyclic loading, the steel reinforced concrete cross-shaped section of short shear wall bearing capacity, deformation capacity and energy dissipation capacity, the change rule of structural damage mechanism,etc.The results show that the great influence on the mechanical properties of structure concrete strength grade, the higher the concrete strength grade, the bearing capacity of the structure, the greater the strength of concrete under monotonic loading for C40 specimen ductility is best.Under cyclic loading, the strength of C40 concrete specimens energy dissipation, the biggest reason suggests about general appropriate chooses C40 concrete strength;Pattern of steel reinforced concrete short shear wall with wall limb section increase its bearing capacityand ductility of the aspect ratio showed a trend of increase after decreases first.Under cyclic loading, the cross section width smaller components the hysteretic performance is poorer,therefore suggested that the ratio value range is 6 to 7.different axial compression ratio of steel reinforced concrete shear walls in the monotonic load down than steel mechanical performance is relatively similar,but under cyclic loading, axial compression ratio of 0.05 and0.7 specimen hysteretic performance is poorer, suggested that axial compression ratio values range between 0.25 0.5;Steel steel ratio smaller artifacts the hysteretic performance is superior to the steel ratio larger artifacts, but relatively less bearing capacity, so the selected steel structure steel ratio should be considered when hysteretic performance and bearing capacity.This article through to the pattern of steel reinforced concrete short shear wall under low reversed cyclic load bearing performance analysis,revealed in the earthquake under the action of steel reinforced concrete cross-shaped short limb shear wall seismic performance and working performance, obtained the theoretical research of steel reinforced concrete short shear wall has the reference value of the conclusion.