Numerical Analysis On The Capacity Of Steel Reinforced Concrete Shear Wall With Shear Connectors

The steel reinforcement concrete (SRC) structure, which is developed from steel structure and reinforced concrete structure, provids an excellent load capacity and seismic performance. The advantages of steel and reinforcement can both be found in the SRC structure, at the same time the disadvantages can be overcome greatly. Based on these reasons, this kind of structure is widely used in large span structures, high-rise structures and super high-rise structures in recent years. The guarantee of shear transfer between different materials is the fundamental requirement of the SRC structure. The slip conditions between steel and concrete were ignored mostly in the past finite element analysis, which were replaced by the coupling treatment between steel and concrete. More considerations should be emphasized to simulate the actual situations.A new kind of SRC wall with stud shear connectors was proposed in this paper. The shear mechanism between steel and concrete was considered. The limit capacity of stud shear connector was chosen to be the start point in this paper. Based on the former study, a modified Ollgaard load-slip relationship with limit slip was investigated, and the rectangular SRC walls were studied, using the finite element analysis software ADINA for static loading simulation. Comparisons between the coupling treatment condition and the uncoupling treatment condition were conducted. The walls with different number of stud were also investigated to find the suitable number of stud. The flexural capacity, sectional strain distribution and the shear transfer between steel and concrete were studied, and the parametric study of steel ratio of end-column was also discussed.The results indicated that, the stiffness of stud had an influence in the load capacity of SRC wall. The increase of the stud number had little effect on enhancing the load capacity of SRC wall after the number reached to a certain degree, while insufficient number of stud would cause a decrease in both the load capacity and ductility. The steel and concrete can be achieved collaborative work as long as there are sufficient stud to transfer shear. The flexural formula of reinforced concrete wall can be used after a slight modification. It is found that the effects of increased steel ratio of end-column can increase the load capacity of SRC wall significantly, yet can not increase the ductility obviously. For shear capacity, the formula in <Technical Specification of Steel-Reinforced Concrete Structures: YB 9082-2006> is recommended.