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Energy dissipation performance of combined low yield point steel plate damper based on topology optimization and its application in structural control

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Document pages: 16 pages

Abstract: Aiming at the disadvantages of large yield stress and poor adjustability of low yield point steel plate, a combined low yield point steel plate damper composed of low yield point steel plate and ordinary steel plate is proposed. Three new types of hollow composite plate dampers are proposed, including inner hollow, boundary hollow and elliptical hollow. Taking "maximum stiffness " and "full stress state " as the optimization objectives, the alternating optimization method is used to optimize the topology of different hollow shapes to obtain the optimal shape. The results show that the initial stiffness of boundary optimization damper and internal optimization damper is large and the hysteretic coefficient is Crves are full, and there is no stress concentration. These two types of optimization models made in different materials rations are studied by numerical simulation, and the adjustability of yield stress of these combined dampers is verified. The nonlinear dynamic responses, seismic capacity, and damping effect of steel frame structures with different combined dampers are analyzed. The results show that the boundary optimized damper has better energy-dissipation capacity and is suitable for engineering application.

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