Finite Element Analysis Of Concrete Filled Steel Tube Columns Row Shear Wall With Steel Plate Energy Bond

With the rapid development of high-rise buildings, the quality of resistance-lateral force component required to be improved, the research of high performance steel-concrete composite shear wall has been paid attention by many scholars. The composite wall has advantages of combination about different materials and different structural forms and overcomes the shortcomings of shear poor ductility and energy dissipation capacity about traditional reinforced concrete. At the same time, it also has a high load capacity and rigidity, good ductility and energy dissipation capacity. In this paper, As a kind of composite wall, the concrete filled steel tube columns row shear wall with steel plate energy bond are composed of three parts, concrete filled steel tube column, steel plate energy dissipation bond and outsourcing concrete strip. Currently, the research about this type composite shear wall is not comprehensive, so the composite shear wall was studied by ABAQUS finite element analysis software under low cycle load is very meaningful. The main content and outcome of the study are as follows:(1) With modest meshing, established a nonlinear finite element model of concrete filled steel tube columns row shear wall with steel plate energy bond under cyclic load, corresponding test boundary conditions and loading system. In the process of establishing model, nonlinear composite wall material of different components, the complexity of the interactions, geometry nonlinearity, as well as concrete tensile and compressive damage factor and steel Bauschinger effect were taken into consideration.(2) The hysteresis curves, skeleton curves and bearing capacity, failure mode, ductility, stiffness degradation and energy dissipation capacity of four typical specimens were discussed by numerical simulation analysis under symmetric cyclic loading at the end of the load beam. Compared with the previous test results, the rationality and reliability of the finite element model are verified.(3) Through the study of simulation feature points, this paper analyzed the specimens working performance and each force stage of the model. The results indicated that the composite wall has good seismic yield mechanisms: outsourcing concrete cracked firstly, and crack distribution was uniform and wide range under the synergy of steel plate energy bond and outsourcing concrete; When the outsourcing of reinforced concrete strip destroyed, energy bonds prior to tube yielded, and dissipated large amounts of energy; After steel energy bond yielded, concrete filled steel tube steel columns rows and beams were formed a border frame structure, carrying the load.(4) Based on the verified model, seven different parameters models were established, Researched the influence of axial compression ratios, shear span ratios, steel plate energy bond arrangement, high thickNess ratio of steel plate, steel plate span depth ratio, steel tube sleeve hoop ratio and the strength grade of material on the seismic performance, and then give the appropriate parameter value specimens. Seismic design principles and structural measures of the composite shear wall were proposed on the different parameter analysis.