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Structural Engineering and Mechanics Volume 53, Number 6, March25 2015 , pages 1127-1141 DOI: https://doi.org/10.12989/sem.2015.53.6.1127 |
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Robust design of liquid column vibration absorber in seismic vibration mitigation considering random system parameter |
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Rama Debbarma and Subrata Chakraborty
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| Abstract | ||
| The optimum design of liquid column dampers in seismic vibration control considering system parameter uncertainty is usually performed by minimizing the unconditional response of a structure without any consideration to the variation of damper performance due to uncertainty. However, the system so designed may be sensitive to the variations of input system parameters due to uncertainty. The present study is concerned with robust design optimization (RDO) of liquid column vibration absorber (LCVA) considering random system parameters characterizing the primary structure and ground motion model. The RDO is obtained by minimizing the weighted sum of the mean value of the root mean square displacement of the primary structure as well as its standard deviation. A numerical study elucidates the importance of the RDO procedure for design of LCVA system by comparing the RDO results with the results obtained by the conventional stochastic structural optimization procedure and the unconditional response based optimization. | ||
| Key Words | ||
| seismic vibration control; liquid column vibration absorber; random system parameters; robust optimization | ||
| Address | ||
| Rama Debbarma: Department of Civil Engineering, National Institute of Technology, Agartala, India Subrata Chakraborty: Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India | ||