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Structural Engineering and Mechanics Volume 81, Number 5, March10 2022 , pages 633-645 DOI: https://doi.org/10.12989/sem.2022.81.5.633 |
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Optimum design of a sliding mode control for seismic mitigation of structures equipped with active tuned mass dampers |
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Hussein Eliasi, Hessam Yazdani, Mohsen Khatibinia and Mehdi Mahmoudi
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| Abstract | ||
| The active tuned mass damper (ATMD) is an efficient and reliable structural control system for mitigating the dynamic response of structures. The inertial force that an ATMD exerts on a structure to attenuate its otherwise large kinetic energy and undesirable vibrations and displacements is proportional to its excursion. Achieving a balance between the inertial force and excursion requires a control law or feedback mechanism. This study presents a technique for the optimum design of a sliding mode controller (SMC) as the control law for ATMD-equipped structures subjected to earthquakes. The technique includes optimizing an SMC under an artificial earthquake followed by testing its performance under real earthquakes. The SMC of a real 11-story shear building is optimized to demonstrate the technique, and its performance in mitigating the displacements of the building under benchmark near- and far-fault earthquakes is compared against that of a few other techniques (proportional-integral-derivative [PID], linear-quadratic regulator [LQR], and fuzzy logic control [FLC]). Results indicate that the optimum SMC outperforms PID and LQR and exhibits performance comparable to that of FLC in reducing displacements. | ||
| Key Words | ||
| active tuned mass dampers; nonlinear control; optimum design; sliding mode control; structural control | ||
| Address | ||
| Hussein Eliasi: Department of Electrical and Computer Engineering, University of Birjand, Birjand, Iran Hessam Yazdani: Department of Civil and Environmental Engineering, Howard University, Washington, DC, USA Mohsen Khatibinia: Department of Civil Engineering, University of Birjand, Birjand, Iran Mehdi Mahmoudi: Department of Civil Engineering, Khayyam University, Mashhad, Iran | ||