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A novel bi-directional rail variable friction pendulum-tuned mass damper (BRVFP-TMD).
- Source :
-
Mechanical Systems & Signal Processing . Aug2023, Vol. 197, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- • Bi-directional rail variable friction pendulum-tuned mass damper (BRVFP-TMD) was proposed. • Bi-directional traditional friction pendulum systems were improved by geometric nonlinearity. • The impact of bi-direction motion to the bi-directional friction pendulum systems was revealed. • Closed-form solutions for the optimal parameters of BRVFP-TMD were obtained. • Bi-directional loadings were conducted to illustrate the superiority of BRVFP-TMD. The shape of hysteretic loops for a friction pendulum system transforms when excited by bi-directional motion, which exhibits unexpected dynamic behavior compared with unidirectional motion. Therefore, a novel bidirectional rail variable friction pendulum-tuned mass damper (BRVFP-TMD) with two independent rails that satisfied the purpose of bidirectional structural response control and provided a full bidirectional friction force was proposed. The variable friction arrangement was applied to the rails so that the BRVFP-TMD could be accomplished with a linear hysteretic damping property that is contributed by the displacement-dependent variable friction force. Using unidirectional harmonic excitations with attack angle as bi-directional loading, illustrations were created to investigate the control effect of traditional pendulum friction TMDs with a spherical sliding surface. This demonstrated the collapse of hysteretic loops of traditional pendulum friction TMDs and superiority of BRVFP-TMD in terms of mechanism. For the BRVFP-TMD with a lightly damped structure, the optimizations of the fixed-point theory were accessed to obtain the closed-form solutions of the optimal parameters of the BRVFP-TMD. Numerical verifications based on bidirectional motions were conducted to evaluate the performance of the BRVFP-TMD. The bidirectional earthquake results indicated stable and excellent performance of the BRVFP-TMD in terms of either frequency response reduction or friction energy dissipation efficiency. Meanwhile, bidirectional wind-induced vibrations confirmed the correctness of the optimization and the stable robustness of the optimized BRVFP-TMD. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08883270
- Volume :
- 197
- Database :
- Academic Search Index
- Journal :
- Mechanical Systems & Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 163699535
- Full Text :
- https://doi.org/10.1016/j.ymssp.2023.110396