Finite Element Analysis On Structural Behavior Of Mid-rise SRC Shear Walls With Built-in Vertical Steel

Mid-rise SRC shear walls with built-in vertical steel refers to composite shear wallformed by building one or more vertical steel into the ordinary SRC shear walls.Compared with the ordinary SRC shear walls, this kind of composite shear wall canreduce the axial compression ratio and be widely used in engineering. However thereare fewer researches on this form shear wall at home and abroad. The experimentalstudy and theoretical research lag behind the engineering practice, which lead to just usethe built-in vertical steel to improve the axial compression ratio of the shear wall in thestructure design and treat the built-in vertical steel as a safety reserve, but ignore theinfluence on the Shear Wall’s mechanical properties by the built-in vertical steel.Therefore, the study of mid-rise SRC shear walls with built-in vertical steel hasimportant theoretical significance and engineering application value.Due to experimental study requiring much time and effort, large-scale systemresearch not allow to carry out。It is also difficult to fully grasp the influence of thevarious parameters on the Shear Wall’s mechanical properties only based on a fewpieces of test results of shear wall. Therefore, it will become a very important means tothe finite element method to study Mid-rise SRC shear walls with built-in vertical steel.In this paper, the general finite element software Abaqus is adopted to establish thethree-dimensional finite element model of mid-rise SRC shear walls with built-invertical steel. SRC shear walls under the high axial compression ratio is carried outnonlinear analysis through the whole stress process from the static load to damage; thepaper compares and analyzes the mechanical properties of mid-rise SRC shear wallswith and without built-in vertical steel under monotonic loading respectively from theaxial compression ratio、 bearing capacity、 deformation and ductility、 stiffnessdegradation, failure pattern, etc. The analysis results show that under the equal axialforce, the SRC shear walls after being built in the vertical steel not only improve theaxial compression ratio of shear wall, but also the bearing capacity and ductility and thelate rigidity of shear walls；And then the shear walls have a better seismic performance.Finally, on the basis of finite element simulation analysis method, the paper discussesthe influence of structural behavior of mid-rise SRC shear walls with built-in verticalsteel from these aspects of steel configuration scheme、 shear span ratio、 axialcompression ratio、steel ratio and other parameters respectively. It also puts forward the reasonable suggestions of steel configuration scheme and the formula of axialcompression ratio. Based on the ductility demand, the paper provides design suggestionof axial compression ratio limit value and steel ratio limit value.The whole research work provides the finite element calculation reference andguides the test set for the group at the follow-up test.