| As modern urban buildings become denser and denser,adjacent structures that are close to each other will be damaged by collision under the action of strong earthquakes.In order to improve the seismic capacity of adjacent structures,a new type of SMA composite friction damper is proposed in this paper,and a shock absorption control model of adjacent structures based on the new SMA composite friction damper is established.The shock absorption effect and arrangement law of adjacent structures of composite friction dampers are studied.The main research work of this paper is as follows:(1)The performance of shape memory alloy strands was studied experimentally,and the improved SMA constitutive model was simulated by numerical method.The accuracy of the improved SMA constitutive model was verified by comparing the test and numerical simulation.line,developed a new type of SMA composite friction damper,which has good energy dissipation capacity and self-reset performance.(2)The finite element model of adjacent structures is established,data is transmitted interactively through the program interface,and the improved genetic algorithm is used to encode and optimize the position of the damper connected to adjacent structures.The shock absorption effect and position arrangement of the new SMA composite friction damper in adjacent structures are analyzed,and the results show that the damper with optimized position has a good shock absorption effect.(3)Selecting near-fault ground motions with pulses,the response of adjacent structures based on the new SMA composite friction damper under pulsed near-fault earthquakes is studied,the energy consumption and shock absorption effect of SMA composite friction dampers are analyzed,and the application improvement The arrangement of dampers is optimized by genetic algorithm,and the shock absorption effect of adjacent structures is compared and analyzed based on the results of optimization analysis. |
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