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Open AccessArticle

Seismic Response Mitigation of Base-Isolated Buildings

1
Department of Civil and Environmental Engineering, Old Dominion University, Norfolk, VA 23529, USA
2
Earthquake Engineering Research Centre, Faculty of Civil and Environmental Engineering, School of Engineering and Natural Sciences, University of Iceland, Austurvegur 2a, 800 Selfoss, Iceland
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(4), 1230; https://doi.org/10.3390/app10041230
Received: 30 December 2019 / Revised: 31 January 2020 / Accepted: 6 February 2020 / Published: 12 February 2020
Earthquake response mitigation of a base-isolated (BI) building equipped with (i) a single tuned mass damper at the top of the building, (ii) multiple tuned mass dampers (MTMDs) at the top of the building, and (iii) MTMDs distributed on different floors of the building (d-MTMDs) is studied. The shear-type buildings are modeled by considering only one lateral degree of freedom (DOF) at the floor level. Numerical approach of Newmark’s integration is adopted for solving the coupled, governing differential equations of motion of 5- and 10-story BI buildings with and without TMD schemes. A set of 40 earthquake ground motions, scaled 80 times to get 3200 ground motions, is used to develop simplified fragility curves in terms of the isolator maximum displacement. Incremental dynamic analysis (IDA) is used to develop simplified fragility curves for the maximum target isolator displacement. It is found that TMDs are efficient in reducing the bearing displacement, top floor acceleration, and base shear of the BI buildings. In addition, it was noticed that TMDs are efficient in reducing the probability of failure of BI building. Further, it is found that the MTMDs placed at the top floor and d-MTMDs on different floors of BI buildings are more efficient in decreasing the probability of failure of the BI building when compared with STMD. View Full-Text
Keywords: Base-Isolated Buildings; bearing displacement; STMD; MTMDs; d-MTMDs; incremental dynamic analysis; earthquake Base-Isolated Buildings; bearing displacement; STMD; MTMDs; d-MTMDs; incremental dynamic analysis; earthquake
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Stanikzai, M.H.; Elias, S.; Rupakhety, R. Seismic Response Mitigation of Base-Isolated Buildings. Appl. Sci. 2020, 10, 1230.

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