Study On The Performance Of Cross-slanted Self-bucking-restrained Corrugated Steel Plate Shear Wall

Conventional steel plate shear walls(SPSW)bear lateral load mainly through the tension band formed by the buckling of embedded steel plates,dissipating energy by yielding along the diagonal tension position.However,the lateral resistance of the tension band can produce large additional bending moments,which have negative effects on the frame columns and put forward higher demand for the anchorage.The infilled steel plate with openings or slots can effectively avoid the negative effect of tension band on frame columns,but their lateral bearing capacity and stiffness would decrease greatly.As a result,they are generally inappropriate for using as the main lateral-load resistance members.Corrugated steel plate shear walls(CSPSW),with embedded corrugated steel plate instead of flat steel plate,demonstrate higher bearing capacity and initial stiffness than conventional SPSW.But large out-of-plane buckling could occur in the middle and later stages of loading,resulting in a substantial decrease of the bearing capacity.Hence,this thesis improves the corrugated steel plate shear wall based on the summary of the research on corrugated steel plate shear wall at home and abroad.With cross-slanted corrugated steel plates,a self-bucking-restrained steel plate shear wall is developed and investigated carefully.The main research contents and conclusive remarks are as follows:(1)By using the finite element analysis software ABAQUS,the conventional steel plate shear wall and corrugated steel plate shear wall are modeled and analyzed,comparing with the existing test results.The correctness and validity of the modelling method and model are verified.(2)Under the same dimensions of beam and column,the models of cross-slanted corrugated steel plate shear wall(CCSPW),horizontal corrugated steel plate shear wall(CSPW),single inclined corrugated steel plate shear wall(SCSPW)and flat steel plate shear wall(FSPW)are established,and the non-linear push-over analysis and simulation analysis under low-cycle reciprocating load are carried out.The results show that: due to the two corrugated steel plates,CCSPW demonstrates higher ultimate lateral bearing capacity and no obvious decrease is observed.The stress distribution is uniform and the material is fully utilized.Compared with SCSPW and FSPW,the bearing capacity of CCSPW increases byabout 123% and 131%,respectively.Moreover,the effect of restraining the out-of-plane buckling of embedded steel plate is remarkable.The out-of-plane displacement of CCSPW is small,which is about 34% lower than that of CSPW and OCSPW under compression.(3)Under low cyclic reciprocating load,the hysteretic curve of CCSPW is full and stable,demonstrating good hysteretic performance and energy dissipation capacity.The positive and negative directions of bearing capacity are basically the same,meaning that the structural bearing capacity stability is good.Compared with CSPW,SCSPW and FSPW,CCSPW shows higher bearing capacity stability,energy dissipation capacity and ductility.(4)By giving different geometric parameters of the embedded corrugated steel plate,their effects on the mechanical performance of CCSPW are analyzed.The results show that:with the increase of aspect ratio,the bearing capacity and lateral stiffness increase,and the out-of-plane displacement decreases.When the wave length of corrugated plate varies from200 mm to 300 mm,the initial stiffness and peak load-bearing capacity increases greatly with the decrease of wavelength.While in the range of 300 mm~500 mm,the initial stiffness and peak load-bearing capacity increase slightly with the decrease of wavelength.Under low cycle reciprocating load,the bearing capacity of the specimen with wavelength of 200 mm decreases greatly in the middle and later stages of loading.Moreover,wave amplitude has little effect on the bearing capacity and lateral stiffness.When the wave amplitude is between30 and 60 mm,the out-of-plane displacement decreases with the wave amplitude increasing,and then increases when the wave amplitude exceeds 60 mm.In addition,the ratio of height to thickness has a significant effect on the lateral stiffness of the bearing capacity of the structure.The bearing capacity,lateral stiffness and energy dissipation capacity of the structure increase as the ratio of height to thickness decreases.Meanwhile,the out-of-plane displacement increases with the decrease of height-thickness ratio.In addition,the vertical load has little effect on the out-of-plane deformation,but it has a great influence on the bearing capacity and the lateral stiffness of the structure,which decreases with the increase of the vertical load.(5)Based on the stress distribution of CCSPW,a formula for calculating ultimate bearing capacity is proposed,and the deflection development is in good agreement with numerical results.Then,some rational suggestions for designing the CCSPW with novel construction areproposed for the future research and engineering application.