| The buckling-restrained steel plate shear wall has a high resistance to lateral stiffness and good energy dissipation capacity,and is a structural member that can effectively provide a high-rise building with resistance to lateral forces.In the paper,a new modular prefabricated buckling-restrained steel plate shear wall with two sides is proposed,then the mechanical properties of four different types of flexion-restrained steel plate shear walls were tested under low-cycle reciprocating loads.Based on ABAQUS finite element software A corresponding numerical calculation model was established,and the correctness of the numerical model was verified through compared the results of the simulation and the experiment.Further,the aspect ratio,the height-to-thickness ratio,the bolt arrangement,the bolt spacing,the spacing between the concrete plate and the connection piece,and the connection piece thickness were addressed.,the number of steel plate blocks and the thickness of concrete slabs,the impact of the parameters to the modular prefabricated two-side connection anti-flexion steel plate shear wall was studied.The main research work and conclusions of this paper are as follows:1.A new type of modular prefabricated steel plate with two sides connected by a buckling steel plate shear wall was proposed.The shear wall is an anti-lateral force component composed of a built-in steel plate,a built-in steel plate and steel plate connector,and two externally attached concrete plates,and has a high load carrying capacity,a clear energy consumption mechanism,simple on-site assembly,and environmental friendly characteristics,Under external loads such as earthquakes and strong winds,the external concrete plate and the embedded steel plate connector can effectively restrain the out-of-plane buckling of the concealed steel plate,thereby improving the seismic performance of the modular prefabricated two-side connection anti-buckling steel plate shear wall.2.Four kinds of 1:3 scale ratio single-story single-span two-side connection anti-flexion steel plate shear wall were designed and manufactured(traditional two-side connection anti-flexion steel plate shear wall,horizontal block module assembly type two-side connection anti-flexion steel plate shear force Walls and vertical block modules are assembled with two sides connected with anti-flexion steel plate shear walls and modular block modules with two sides connected with anti-flexion steel plate shear walls),and performance tests were conducted under low cyclic load.The test results show that the modular prefabricated modular shear-restrained steel plate shear walls have good bearing capacity and energy dissipation capacity.The prefabricated concrete slabs and the inner steel plate connectors on both sides effectively restrain the out-of-plane buckling of the embedded steel plate deformation,so that the built-in steel plate to bear the horizontal load in the form of in-plane shear;The lack of consider in the test is that the design of the modular assembly of two sides connected anti-flexion steel shear wall concealed steel plate connector corner were easy to tilt,affect the test parts performance.3.Based on the ABAQUS finite element software to establish a modular prefabricated two-side connection of the anti-buckling steel plate shear wall and the common two-side connection anti-buckling steel shear wall numerical model,the numerical simulation results and test results are compared to verify the correctness of the established finite element model.The analysis results show that the hysteretic curve of the finite element model established by the numerical simulation are in good agreement with the experimental hysteresis curve.The simulated values of the bearing capacity of each specimen are close to the experimental values.The maximum error is only 8.9%,and the numerical simulation results are obtained.The stress distribution of the inner steel plate in each test piece is consistent with the test piece deformation shape and damage characteristics,which verifies the correctness of the numerical model.4.The failure modes of the designed specimens are tearing of the inner steel plate,and the initial cracks of the steel plate are generated at the cormers of the test piece.Among them,the traditional two-side connection of the anti-buckling steel plate shear wall was embedded in the initial stage of loading.Out-of-plane deformation occured,and the later-staged concrete slabs participate in anti-side loading.When the loaded steel plate is suddenly torn at 21mm(displacement angle 0=21/1200).the modular assembly type is connected to the lateral block and the anti-buckling plate shear wall is loaded to 25mm.(0=25/1200)cracks in the hidden steel plate,loading to 35mm(0=35/1200)at the time of the failure of the specimen;modular assembly of the two sides connected to the vertical block of anti-buckling steel shear wall due to the weld quality is better,When loaded to 50mm(0=50/1200),the steel plate in the container is broken.When the sample is loaded to 55mm(0=55/1200),the test piece is broken.The wavy cross stripes appear in the hidden steel plate.The buckling-restrained steel plate shear wall was loaded to 35mm(0=35/1200),and the inner steel plate was broken.At 45mm(0=45/1200),the test piece was destroyed,and the embedded steel plate showed wavy cross stripes.5.Different aspect ratios,height-to-thickness ratios,bolt arrangements,bolt spacings,spacing between concrete slabs and joints,thickness of joints,number of sub-blocks,and thickness of concrete slabs were performed on modular prefabricated two-sided connection-restrained buckling steel sheet shear walls parameters were analysed.The analysis results show that the energy dissipation capacity and ultimate bearing capacity of the modular prefabricated shear wall sandwiched by two sides are enhanced with the increase of the height-to-height ratio of specimens.The staggered arrangement of bolts can increase the carrying capacity of the specimens capacity,but a greater burden on the concrete slab will be caused.With the increase in the thickness of the connector and the decrease in the spacing of the external concrete plate,the energy dissipation capacity and ultimate bearing capacity of the test specimens are successively enhanced.With the increase in the thickness of the external concrete slab,the bearing capacity and energy dissipation capacity of the test piece slightly increase.With the increase of the number of steel plate pieces of the test piece,the energy consumption and bearing capacity of the sample increase first and then decrease.When the number of blocks in the hidden wall plate in the shear wall is two,The test piece has the best mechanical properties.. |
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