Study On Seismic Performance Of New-type Prefabricated Metal Damping Composite Wall Wallboard Structure

In this paper,new-type prefabricated metal damping composite wallboard structure(MDW)was proposed for the research group.Finite element software modeling such as ABAQUS,ETABS and Perform-3D was used to analyze the seismic performance and stress mechanism of wallboard.The main research contents and results are as follows:(1)9 numerical model of MDW is established for Seismic performance analysis.The research mainly considers four factors of the energy consuming steel plate in the wallboard,namely,the thickness,cross section height,quantity and opening form.The results show that the thickness and quantity of energy dissipation steel plate can obviously improve the hysteretic behavior,initial stiffness and displacement ductility of the wallboard.The yield mode of the energy dissipation steel plate with rhombic holes is improved remarkably,and the stress at the connection between the steel plate and the wall panel can be reduced to ensure the reliable connection between the energy consumption steel plate and the concrete panel.With the increase of cross section of energy dissipation steel plate,the load-bearing capacity and initial stiffness of wallboard can be improved at a certain extent.(2)To study the seismic performance of concrete frames with MDW,13 numerical models of concrete frames with prefabricated metal energy dissipation composite wallboard were developed for seismic performance analysis based on the finite element numerical analysis software ABAQUS.Four main factors of specimen,namely,the thickness and material strength of the consuming steel plate,the thickness and spacing of wallboard,were evaluated.The numerical simulation results of the empty frame were compared with the existing experimental results,and the rationality of the numerical simulation was determined.The result showed that the hysteretic performance,initial stiffness and bearing capacity of thespecimen can be improved by increasing the thickness of the steel plate.The difference of bending moment between the two ends of a frame beam with a large thickness of steel plate was larger.When the wall thickness was increased,the initial stiffness of the specimen was slightly increased.The change of wall thickness has little effect on the seismic performance of the specimen.With the increase of wallboard panel spacing,the energy dissipation capacity,initial stiffness and bearing capacity of the specimen were decreased,and the ductility was slightly improved.(3)A simplified model of MDW elastoplastic analysis was established based on the simplified diagonal brace model of traditional wallboard combined with the multi-segment shaping element,and the model was verified well with the experimental results.The numerical model of MDW structure system was established by ETABS and Perform-3D finite element software.The results show that MDW enhances the energy dissipation capacity of the structure without adding excessive stiffness,The results show that MDW enhances the energy dissipation capacity of the structure without adding excessive stiffness,and the structure has good seismic performance.The hysteresis curve of the wallboard is full of rules in the case of earthquakes and rare earthquakes,showing excellent energy consumption.The MDW structure has realized the original design intention of "the small shock is in the elastic recoverable state and the large shock enters the plastic energy dissipation".