Seismic Performance Of Double-Coupling Beam-Coupled Frame Shear Wall Structures

The combined-leg shear wall structure has good seismic performance and horizontal lateral stiffness,and is widely used in the seismic design of high-rise buildings.However,with the rapid development of the economy,our country has higher and higher seismic requirements for structures.In order to further improve the seismic performance of the structure,some scholars have proposed a combined frame shear wall structure,but there are few studies on this structure,and the seismic performance It is not yet clear,and further research is needed.Based on the coupled frame shear wall structure,this paper analyzes the influence of the double coupling beam opening or not,the change of the double coupling beam opening height and the opening position on the seismic performance of the structure,and studies the effect of three equivalent double coupling beam stiffness methods..For this reason,this paper uses ABAQUS software to model,and analyzes it from the following aspects.(1)Establish a 3-story deep coupling beam coupled frame shear wall model and a double coupling beam coupled leg frame shear wall model,and perform monotonic loading and low-cycle repeated loading on the models.The load-displacement curve of the model,the damage pattern of the structure and the hysteresis curve of the structure are analyzed,and the ductility performance and bearing capacity of the two models are compared.The results show that the ductility performance of the coupled frame shear wall structure is improved after additional openings,but the bearing capacity of the structure is reduced.(2)Establish a 6-storey shear wall model with double-coupling beam and joint-leg frame,change the opening height and opening position of the coupling beam,and conduct modal analysis and dynamic time history analysis on the model.Analyze the mode shape diagram,natural frequency,maximum shear force between stories,maximum displacement between stories and longitudinal reinforcement stress of coupling beams of each model,and compare the seismic performance of each model.The results show that when the opening height of the coupling beam is increased,the shock absorption performance of the structure is improved,but the lateral movement resistance of the structure is reduced;when the opening position of the coupling beam changes,the impact on the seismic performance of the structure is small.(3)In the frame shear wall structure,the equivalent model of shear stiffness of 6-story double coupling beam,the equivalent model of bending stiffness of double coupling beam and the equivalent model of corner stiffness of double coupling beam are established.The internal force value of the left end section of the coupling beam,the stress value of the lower right corner of the coupling beam and the maximum interstory displacement of each model are analyzed,and the equivalent effects of each model are compared.The results show that from the perspective of equivalent effect,calculation principle and workload,the double-coupling beam corner stiffness equivalent method is more suitable for practical engineering.