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Earthquakes and Structures Volume 21, Number 1, July 2021 , pages 23-36 DOI: https://doi.org/10.12989/eas.2021.21.1.023 |
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Seismic performance analysis of rocking wall TMDs structure based on shaking table test |
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Wei Nie, Shuxian Liu, Shasha Lu, Shaodong Liu, Chun Bai and Hang Yin
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| Abstract | ||
| This research aims to address the problem of frequency sensitivity of traditional tuned mass damper (TMD) and the difficulty in connecting the rocking wall by combining the construction technology of rocking wall with the vibration-control mechanism of TMD. The two 1/10 scaled six-story RC frame structures with and without rocking wall TMDs were precast and tested on a shaking table based on the principle of "consistent similarity law" to assess the seismic performance of the innovative system of vibration control, namely rocking wall TMDs. The results show that under three ground motions namely EL Centro, Taft and Artificial waves with peak accelerations of 0.2 g and 0.4 g, the rocking wall TMDs effectively controlled the primary structure response and the vibration-control effect of rocking wall TMDs was more significant with increased seismic intensity. Due to weaken the connections between the rocking wall and the primary structure, the out-of-phase vibration were more obvious, contributing to momentum exchange and tuning primary structure frequency. Consequently, the maximum acceleration, displacement, inter-story drift angle and Fourier spectrum decreased significantly under different seismic excitations, improving the frequency sensitivity of the traditional TMD. In addition, the rocking wall TMDs set along the height of the structure effectively enhanced the momentum exchange of each floor, which in return reduced the dynamic response amplification, controlled the structural deformation mode, and achieved overall vibration control effect. Therefore, the rocking wall TMDs have good seismic performance and robustness. | ||
| Key Words | ||
| out-of-phase vibration; rocking wall TMDs; seismic performance; shaking table test; vibration-reduction effect; vibration control | ||
| Address | ||
| Wei Nie: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Shuxian Liu: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Shasha Lu: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Shaodong Liu: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Chun Bai: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Hang Yin: Department of Civil Engineering, Liaoning Technical University, Fuxin 123000, China | ||