Research On Mechanical Property Of Staggered Shear Wall Structure

Staggered shear wall structure is a new architectural structure. Stagger arrangement means that the arrangement form of shear wall slabs is not the continuous arrangement form of traditional frame-shear wall structure wallboard along the height direction, but the skip-floor staggered arrangement form of shear wall slabs relying on frame structure. The special wallboard arrangement form of staggered shear wall structure makes the spatial arrangement of structure more flexible, and obtains unbraced space with larger area. The structure weight is reduced, and building materials are saved. The paper summarizes domestic and international relevant researches and establishes six finite element models. Two traditional shear wall structures CT1, CT2, along with four staggered shear wall structures CL1, CL2, CL3 and CL4, are herein included. ABAQUS and SAP2000 finite element software is used to make static elastoplastic analysis and dynamic time history analysis on the six structures. On the basis of the static elastoplastic analysis result, contrastive analysis is made on concrete crack developing, structural yielding, ultimate load, reinforcement stress change, structural horizontal displacement, storey drift and resistant-lateral rigidity of traditional and staggered shear wall structures; an analysis is made on the shock resistance of structures under the effect of low-cycle repeated load, hysteretic & skeleton curves are drawn, and the ductility of structures, energy-dissipating capacity, strength reduction and P-â–³ effect of staggered shear wall structure are analyzed; based on the dynamic time history analysis result, contrastive analysis is made on the top displacement, base shear, natural vibration period and the first three order vibration modes of traditional and staggered shear wall structures under the effect of seismic waves. Through contrastive analysis, a conclusion is drawn that the resistant-lateral rigidity of staggered shear wall structure is larger, the ultimate horizontal bearing capacity is stronger, and the plastic deformability is lower than traditional shear wall structure. Therefore, the structural measures in the weak links shall be prepared well for the purpose of ensuring sufficient plastic deformability and energy-dissipating capacity under the effect of seismic wave.