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Improving the seismic performance of buildings by increasing structural damping

Lookup NU author(s): Professor Sean Wilkinson


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© Civil-Comp Press,2015. In previous earthquakes, seismic resistant buildings were successful in ensuring the safety of occupants; however, the required repair budget was high due to the massive structural and non-structural damage. The aim of the study, presented in this paper, is to examine whether increasing structural damping can limit inter-storey drifts, induced by ultimate seismic loads, to the serviceability limit state specified by the Eurocode. This project has examined the feasibility of that, by testing a threestorey structural model on the Newcastle University shaking table, with and without improved fluid viscous dampers. This study includes two static tests (for finding stiffness), three free vibration tests (for quantifying natural period and damping) and twenty-eight dynamic tests (for evaluating inter-storey drifts). Software analyses, using space gass, were also used to check the physical properties of the model, such as stiffness and natural period. The model was tested without dampers and with the proposed viscous damper. The new introduced pipe connected dampers (PCD) can be considered as a novel idea presented in the study. Attachment of the PCD significantly increased the damping from 1.88% to 15.65%. PCDs were not able to limit ultimate drifts to serviceability drifts; however, it allowed the authors to find an exponential curve that can relate damping ratio to inter-storey drift. This curve was used to calculate damping required to meet Eurocode damage limit which was quantified as 21.6 percent. Experts in this field believe that the construction of costeffective energy dissipation systems that provide around 20 percent damping might be possible.

Publication metadata

Author(s): Al-Rifaie H, Wilkinson S

Editor(s): J. Kruis, Y. Tsompanakis and B.H.V. Topping

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing

Year of Conference: 2015

Pages: 172

Online publication date: 01/09/2015

Acceptance date: 01/01/1900

ISSN: 1759-3433

Publisher: Civil-Comp Press


DOI: 10.4203/ccp.108.172

Series Title: Civil-Comp Proceedings