Dimopoulos, Athanasios I., Tzimas, Angelos S., Karavasilis, Theodore L. and Vamvatsikos, Dimitrios (2016) Probabilistic economic seismic loss estimation in steel buildings using post-tensioned moment-resisting frames and viscous dampers. Earthquake Engineering and Structural Dynamics, 45 (11). pp. 1725-1741. doi:10.1002/eqe.2722 ISSN 0098-8847.

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Abstract

The potential of post-tensioned self-centering moment-resisting frames (SC-MRFs) and viscous dampers to reduce the economic seismic losses in steel buildings is evaluated. The evaluation is based on a prototype steel building designed using four different seismicresistant frames: (a) conventional moment resisting frames (MRFs); (b) MRFs with viscous dampers; (c) SC-MRFs; or (d) SC-MRFs with viscous dampers. All frames are designed according to Eurocode 8, and have the same column/beam cross-sections and similar periods of vibration. Viscous dampers are designed to reduce the peak story drift under the design basis earthquake (DBE) from 1.8% to 1.2%. Losses are estimated by developing vulnerability functions according to the FEMA P-58 methodology, which considers uncertainties in earthquake ground motion, structural response, and repair costs. Both the probability of collapse and the probability of demolition due to excessive residual story drifts are taken into account. Incremental dynamic analyses are conducted using models capable to simulate all limit states up to collapse. A parametric study on the effect of the residual story drift threshold beyond which is less expensive to rebuild a structure than to repair is also conducted. It is shown that viscous dampers are more effective than post-tensioning for seismic intensities equal or lower than the maximum considered earthquake (MCE). Posttensioning is effective in reducing repair costs only for seismic intensities higher than the DBE. The paper also highlights the effectiveness of combining post-tensioning and supplemental viscous damping by showing that the SC-MRF with viscous dampers achieves significant repair cost reductions compared to the conventional MRF.

Item Type:	Journal Article
Alternative Title:
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Journal or Publication Title:	Earthquake Engineering and Structural Dynamics
Publisher:	John Wiley & Sons Ltd.
ISSN:	0098-8847
Official Date:	September 2016
Dates:	Date Event September 2016 Published 1 March 2016 Available 28 January 2016 Accepted 28 July 2015 Submitted
Volume:	45
Number:	11
Page Range:	pp. 1725-1741
DOI:	10.1002/eqe.2722
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	1 February 2016
Date of first compliant Open Access:	1 March 2017

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