Dynamic Time History Analysis Of Steel Frame-steel Plate Externally Bonded FRP Composite Shear Wall Structure

Steel plate shear wall has good ductility and energy dissipation, as an excellent component to resist lateral force applied in many high-rise building structure system.But ordinary steel plate shear walls under the action of horizontal force plate easily occurs outside the surface buckling, ordinary steel plate shear wall externally bonded FRP, can provide reliable constraint for steel plate, restrain its out of plane buckling, thus formed steel frame-steel plate externally bonded FRP composite shear wall.Elastoplastic research of steel frame-steel plate externally bonded FRP composite shear wall has obtained certain achievements, but the dynamic characteristics research of structure under bi-directional earthquake has just started, therefore, it is necessary to study the dynamic characteristics of steel frame-steel plate externally bonded FRP composite shear wall structure under strong earthquake.This article first using the nonlinear layered shell element of SAP2000 establish steel frame-steel plate externally bonded FRP composite shear wall simplified analysis model, and verified the rationality of the model with comparing the related test; Then, adopt the structural style of a command center, get through PKPM to establish steel frame-steel plate externally bonded FRP composite shear wall structure finite element model under three-dimensional space, and verified the finite element parameters conform to the requirement of national standard. Finally, through the replace shear wall of PKPM model, in the form of shear wall by using SAP2000 establish steel frame-steel plate externally bonded FRP composite shear wall structure finite element model(the BASE model), on the basis of the BASE model, according to the type of filling wall and the change of the stiffness, establish eight finite element model. The above model vibration mode decomposition response spectrum analysis and nonlinear dynamic time history analysis.The results show that:(1) from the perspective of the filling wall type, under the effect of severe earthquake, the displacement of four floors steel frame-shear wall structure and interlayer displacement Angle is relatively small, showed good ability to resist lateral; Under strong earthquake, four kinds of interlayer displacement of the steel frame-shear wall structure has greatly increased, but the interlayer displacement Angle satisfies the requirement of specification limits, showed a better ability to resist lateral, the steel frame-steel plate externally bonded FRP composite shear wall structure of minimum vertex displacement curve and acceleration curve fluctuations, satisfies the needs of lateral stiffness and good ductility and the seismic performance is best.(2) from the perspective of the stiffness, under the action of frequent earthquake and strong earthquake, frame stiffness of steel frame-steel plate externally bonded FRP composite shear wall structure has a certain degree of impact dynamic response. Along with the increase of stiffness, the peak of top interlayer displacement decreases, and the base shear and the peak of acceleration peak incerse.Steel plate externally bonded FRP composite shear wall supply enough lateral stiffness, semi-rigid joint is more advantageous to earthquake.The prospect of the steel frame-steel plate externally bonded FRP composite shear wall structure is promising.In this paper, the factors that affect dynamic characteristics of the structure of several different aspects of the analysis, provide a reference for further theoretical research and practical application.