| Steel plate shear wall as a component to resist lateral force, because of its low surface stiffness, may generate lose-stability such as out-of-plane and local buckling. Usually several measures are adopted, for example setting stiffening rib, increasing the plate thickness or outsourcing the concrete slabs, which are used to strengthen plate and inhibit plate buckling. Setting stiffening rib and increasing thickness of the plate has poorer economic effect, while the construction technology of outsourcing concrete slab is complex, and the construction can damage the bearing capacity of steel plate. Therefore, to enhance steel wall and suppress buckling in an economical and simple way is the key to the problem. FRP reinforced steel plate shear wall has many advantages such as convenient construction, low cost and outstanding enhanced effect. Using FRP cladding to the steel plate wall forms a new type of composite steel plate wall, and makes up steel frame- composite steel plate shear wall structure with the steel frame(FRSW).Predecessors’ research showed that FRP reinforced steel plate shear wall was a more excellent kind of a component to resist lateral force compared with pure steel plate shear wall, and its strength was increased sharply, hysteretic energy dissipation ability was improved. But this new type of reinforced steel plate shear wall was lack in systematic experimental study and theoretical analysis. Previous studies had the following deficiencies.(1)The experimental study of the new reinforced steel plate shear wall was lack so that the mechanical performance, hysteresis property and failure mechanism is not clear.(2)The nonlinear finite element analysis was lack,which considered performance of FRP, steel plate buckling behavior and the mechanical properties combining FRP with steel plate.(3)The simplified model of FRP reinforced steel plate shear wall and concrete seismic theory and design method was lack.In order to further study the transfer mechanism and energy dissipation capacity of FRSW structure, this paper carried out the following research work. First of all, established a FRP reinforced steel plate shear wall structure‘s finite element analysis model with ABAQUS6.10 finite element software as the platform. The simulation of monotonic and cyclic loading was carried out and compared with the existing test.By comparison, the results of calculation and testing are in good agreement. The ultimate bearing capacity and elastic stiffness of the finite element model was similar to existing test the same as hysteretic curve shape. Based on the existing FRP reinforced steel plate shear wall test validation, no account of the fracture and stripping of FRP while damage criterion was used to realize FRP damage,which was feasible way and had a certain accuracy. This can not only simulate the reinforced effect of FRP, but also shorter computer time and guaranteed accuracy, which was a kind of simple and practical simulation method.Based on the verified model, the BASE model was established, which was used in the parameters analysis. To study the FRSW structure’s change rule of mechanical properties and energy dissipation under the influence of different factors, six main parameters were chosen, which could affect FRSW structure performance. They were FRP installation quantity, FRP principal direction angle, FRP thickness, FRP material, thickness of steel plate, steel plate strength. According to six main parameters, 10 finite element analysis model was designed. Monotonic load and cyclic load was carried out on the model. Calculation result was obtained by finite element analysis to analyze the overall and local analysis of FRSW performance, power transmission mechanism, and hysteretic energy dissipation capacity. Through the study found that using FRP to reinforce steel plate shear wall could boost steel plate wall bearing capacity, stiffness, and improve the ability of energy dissipation, and to a certain extent, inhibit steel wall outside surface buckling was controlled and the stress was more even. FRP thickness, material quality, the main direction angle, such meetings should be considered, which make enhancement effect optimization. Also should pay attention to steel plate’s thickness and strength in the design, which influence the bearing capacity, stiffness, energy dissipation of composite steel plate wall obviously. Compared FRP reinforced steel plate shear wall with the pure steel plate shear wall, its strength boosted and hysteretic energy dissipation capacity improved, which was a more excellent component to resist lateral force.In this paper, several main factors affecting the FRSW structure performance was analyzed, and provided a reference for further theoretical and experimental research. |
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