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One of the devices for passive structural control is the tuned mass damper (TMD) which consists of a mass, spring, and damping. The seismic behavior of structures equipped with tuned mass dampers is influenced by the value of damper components. Generally, the determination of TMD parameters to achieve optimal seismic behavior is defined in the framework of optimization problems. In this paper, the optimal design of TMDs is carried out using different methods and the effect of the optimization method on the optimal design of structures equipped with TMD was investigated. For this purpose, three strategies based on the meta-heuristic optimization method, inverse reliability (IR) method, and reliability-based optimization (RBDO) method are used for the optimum design of TMDs and the seismic responses of the structure are compared for each case. In the reliability-based optimization method, the optimal design is performed with the objective function based on the target reliability of the structure. The results show that the mass and damping of TMD, respectively, have the most and least important in reducing the drift of structure. The reliability index in the structures equipped with TMD is sensitive to the mass and stiffness of the TMD and is not sensitive to damping. Also, the optimal design of TMD was evaluated based on the target reliability. The results show that the RBDO strategy has a good ability to explore the search space, and the designed TMD with the RBDO method has a good performance in the reduction of seismic responses. However, due to the lack of constraints for the design variables domain, the inverse reliability strategy results are unacceptable.
Asian Journal of Civil Engineering – Springer Journals
Published: Feb 1, 2022
Keywords: Reliability; Tuned mass damper (TMD); Uncertainty; Reliability-based design optimization (RBDO); Inverse reliability (IR); Colliding body optimization (CBO)
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