Seismic Performance On Composite Steel Pipe Concrete Shear Wall Based On The OpenSEES Layered Shell Element

Shear wall is the mainly lateral shift component of high-rise and super high-rise building,and has great effect on resisting horizontal seismic load of building structure.Along with the increase of high-rise buildings,the majority of sholars begin to pay attention to how to improve the performance of shear walls.However,at present,domestic and foreign sholars are mainly concentrated in the steel-concrete composite shear wall,such as steel reinforced concrete shear wall,steel reinforced concrete shear the wall plate and concrete shear wall.Therefore,putting forward a new type of composite steel tube concrete shear wall and studying on its seismic performance have great theoretical value and significance for engineering.(1)This paper discusses the research status of steel reinforced concrete shear wall and the shear wall finite element model of domestic and foreign,gives the contrast analysis of the advantages and disadvantages of different shear wall element model in OpenSEES software,carries out the theoretical study of the layered shell model,choses OpenSEES software to build layered shell model and tests the feasibility and correctness of the simulation of shear wall by layered shell element model.(2)This paper proposes a new type of composite steel tube concrete shear wall,respectively gives the contrast simulation analysis among reinforced concrete shear wall,concrete-filled steel tube shear wall and composite steel tube concrete shear wall,and validates the superiority of composite steel tube concrete shear wall through comparing the hysteretic behavior of different shear wall models.(3)This paper analyses the influential factors of composite steel tube concrete shear wall based on the layered shell element model of OpenSEES,and probes into the influencing rules of concrete strength grade,steel strength grade,square steel tube diameter and longitudinal reinforcement diameter of shear wall on the performance of composite steel tube concrete shear wall under low cyclic loading.(4)This paper respectively gives the contrast simulation analysis of composite steel tube concrete shear wall structure and concrete-filled steel tube shear wall structure under the action of three seismic waves.And the conclusion is that the seismic performance of the composite steel tube concrete shear wall is superior.(5)Based on the design code of shear wall in China and the research on concrete filled steel tube shear wall,a formula for the calculation of composite steel tube concrete shear wall is derived,and the correctness of the formula is verified by comparing the calculated and simulated values.It provides a theoretical basis for the design of this type structure.