Study On Seismic Performance Of Corrugated Steel Plate Shear Wall With PEC Column In Two Layers

Steel plate shear wall structure is a widely used form of structure in the field of earthquake resistance.The traditional flat steel plate shear wall structure has poor out-of-plane stiffness and limited plastic deformation capacity.Therefore,corrugated steel plates with certain out-ofplane stiffness and good plastic deformation capacity are introduced.In the steel plate shear wall structure,ordinary steel columns have limited anchoring effect on the embedded steel plates.PEC columns are introduced as anchoring units to provide sufficient anchoring capacity,ensure the formation of a full tension field in the corrugated steel plate,increase the structural energy dissipation capacity,and reduce the thickness of the embedded steel plate,thereby reducing costs.This forms a new type of corrugated steel plate shear wall structure system with PEC columns.In this paper,two two-story corrugated steel plate shear wall specimens with PEC columns were designed and manufactured for cyclic loading tests.A finite element model of 62one-story and two-story corrugated steel plate shear walls with PEC columns was established,and the finite element model was subjected to unidirectional and cyclic loading simulation studies.The test and finite element simulation results were compared and analyzed.The main contents are as follows:(1)The cyclic loading test research shows that the two-story corrugated steel plate shear wall structure with PEC columns has high bearing capacity and good energy dissipation performance.(2)The test research found that the failure mode of the two-story corrugated steel plate shear wall structure with PEC columns is: firstly,the shear deformation of the first-layer corrugated steel plate of the specimen begins and gradually enters the yield state,dissipating part of the energy,and then the second-layer corrugated steel plate also reaches the yield state and dissipates more energy;finally,as the yield area of the first-layer corrugated steel plate gradually expands,the first and second-layer corrugated steel plates of the structure both reach the strength limit,producing large areas of yield,folding angles,and tearing openings,and the bearing capacity of the entire specimen decreases,leading to structural failure.(3)The comparative analysis of the test data and finite element simulation data of the two two-story corrugated steel plate shear wall structures with PEC columns shows that although there are differences in loading mode and boundary conditions,the two methods produce similar hysteresis performance,stiffness degradation law,deformation and stress distribution.This indicates that finite element numerical simulation research has high accuracy and reliability.(4)Through multi-parameter finite element simulation research on the high-to-thickness ratio of corrugated steel plates,wavelength,height,and concrete grade of PEC columns,the results show that the high-to-thickness ratio of embedded corrugated steel plates is one of the key factors determining the bearing capacity and energy dissipation performance of the structure.When the high-to-thickness ratio is between 1120 and 560,the structure has good bearing capacity and energy dissipation performance.The changes in the wavelength,height of corrugated steel plates,and concrete grade of PEC columns have little effect on the initial stiffness and bearing capacity of the structure,and the bearing capacity increase is within 5%.For the two types of new embedded corrugated steel plate forms,the embedded corrugated steel plate with PEC columns performs better in terms of bearing capacity and energy dissipation performance.