| The concrete-filled square steel tube frame-coupled steel plate shear wall structure has received more attention in recent years.The concrete-filled square steel tube in the structure has fully utilized the advantages of both steel and concrete materials,and has a good strength for vertical loads.The steel plate shear wall mainly bears the horizontal force through the tensile field formed after buckling.This paper completed the pseudo-static test of steel plate shear wall with vertical channel stiffeners.The seismic performance of the moment-resisting frame-coupled steel plate shear wall dual lateral force-resisting structure under the action of frequent and rare earthquakes was studied.With reference to the layout form of the dual lateral force-resisting structure,the single lateral force-resisting structure were designed to study the difference in the performance of the two type of lateral force-resisting structures.The main research contents are as follows:(1)The cyclic test of a 1/3 ratio of 3-span 3-bay coupled steel plate shear wall with vertical channel stiffeners was conducted,and the failure characteristics and hysteresis curve of the specimen were obtained.The results show that the horizontal load on the specimen is mainly borne by the stiffened web plates.After entering the elastoplastic stage,the corners of the web plates are first torn due to stress concentration.Then the weld coulping beam-to-column connections fractured.The plastic hinges were formed at ends of boundary beams.Web plates were torn at central.In the end,the specimen was damaged due to the plastic hinge formed at the foot of the concrete-filled square steel tube.The plastic development of each component of the specimen is relatively sufficient,and the structure of the specimen has good strength and energy dissipation capacity.(2)The numerical analysis model of the test specimen was established by using the numerical analysis software SAP2000.The strip model was used to simulate the web plate,and the Pushover analysis is carried out.The results show that the strip model can simulate the mechanical behavior of steel plate shear wall,and the plastic hinges appear on the coupling beams,web plates,and boundary beams in sequence,which are basically consistent with the experimental phenomenon.The simulation proves the correctness of the modelling method in this paper.(3)The nonlinear static and dynamic analysis of the 15-story,20-story and 30-story concrete-filled square steel tube frame-coupled steel plate shear wall archetypes were conducted.The performance points,the base shear-displacement curve,and the displacement response of 3 structures were obtained.The results show that the design of archetypes is reasonable,and the maximum story drift in the elastoplastic analysis meets the requirements in the Chinese specification.The steel plate shear wall can bear larger shear forces,the structure has good strength,and plastic behavior under the action of rare earthquakes.(4)With reference to the layout of the concrete-filled square steel tube frame-coupled steel plate shear wall dual lateral force-resisting structure,the 15-story,20-story,and 30-story concrete-filled square steel tube gravity frame-coupled steel plate shear wall single lateral force-resisting archetypes were designed.The nonlinear static and dynamic analysis were conducted.Analysis results were compared with the dual lateral force-resisting structure.The results show that the initial stiffness and base shear of the dual lateral force-resisting structure are greater than the corresponding single lateral force-resisting;in the single lateral force-resisting structure,the lateral force is mainly resisted by the steel plate shear walls.Thus,the cross section of the boundary elements of steel plate shear walls in the single lateral force-resisting structure are larger than the dual lateral force-resisting structure;the main seismic indexs show that the overall seismic performance of the two lateral force structures is good and basically meets the requirements The requirements of seismic-resisting in the Chinese code were satisfiable. |
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