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Structural Engineering and Mechanics Volume 81, Number 6, March25 2022 , pages 691-703 DOI: https://doi.org/10.12989/sem.2022.81.6.691 |
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Vibration characteristic of rubber isolation plate-shell integrated concrete liquid-storage structure |
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Xuansheng Cheng, Lei Qi, Shanglong Zhang, Yiting Mu and Lingyu Xia
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| Abstract | ||
| To obtain the seismic response of lead-cored rubber, shape memory alloy (SMA)-rubber isolation Plate-shell Integrated Concrete Liquid-Storage Structure (PSICLSS), based on a PSICLSS in a water treatment plant, built a scale experimental model, and a shaking table test was conducted. Discussed the seismic responses of rubber isolation, SMA-rubber isolation PSICLSS. Combined with numerical model analysis, the vibration characteristics of rubber isolation PSICLSS are studied. The results showed that the acceleration, liquid sloshing height, hydrodynamic pressure of rubber and SMA-rubber isolation PSICLSS are amplified when the frequency of seismic excitation is close to the main frequency of the isolation PSICLSS. The earthquake causes a significant leakage of liquid, at the same time, the external liquid sloshing height is significantly higher than internal liquid sloshing height. Numerical analysis showed that the low-frequency acceleration excitation causes a more significant dynamic response of PSICLSS. The sinusoidal excitation with first-order sloshing frequency of internal liquid causes a more significant sloshing height of the internal liquid, but has little effect on the structural principal stresses. The sinusoidal excitation with first-order sloshing frequency of external liquid causes the most enormous structural principal stress, and a more significant external liquid sloshing height. In particular, the principal stress of PSICLSSS with long isolation period will be significantly enlarged. Therefore, the stiffness of the isolation layer should be properly adjusted in the design of rubber and SMA-rubber isolation PSICLSS. | ||
| Key Words | ||
| concrete; liquid storage structure; rubber isolation; shaking table test; shape memory alloy; vibration characteristic | ||
| Address | ||
| Xuansheng Cheng, Lei Qi, Shanglong Zhang: Western Engineering Research Center of Disaster Mitigation in Civil Engineering of the Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China Yiting Mu, Lingyu Xia: Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China | ||