Journal
STRUCTURE AND INFRASTRUCTURE ENGINEERING
Volume 13, Issue 5, Pages 537-553Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15732479.2016.1173070
Keywords
Self-centring braced frames; expected annual loss; life cycle cost; seismic performance evaluation; cost-benefit analysis; uncertainties
Categories
Funding
- National Science Foundation [CMMI 1235327]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1235327] Funding Source: National Science Foundation
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Self-centring concentrically braced frame (SC-CBF) systems have been developed to reduce post-earthquake damages in braced frames. However, due to special details required by the SC-CBF system, the construction cost of an SC-CBF is expected to be higher than that of a conventional CBF. In this study, the seismic performance and economic effectiveness of two prototype buildings utilising SC-CBFs are assessed and compared with buildings utilising conventional CBFs by evaluating the annual probabilities of exceeding various damage levels, expected annual losses, life cycle costs (under seismic hazard) and economic benefit of using SC-CBFs considering prevailing uncertainties. The results of this study show that the SC-CBF buildings have lower drift-related losses but higher acceleration-related losses. The SC-CBF is found to be beneficial for the 6-storey configuration, but not for the 10-storey configuration. For the 6-storey buildings studied here, if the construction cost of the SC-CBF is assumed to be twice that of the CBF, the pay-off time is expected to be 12 to 21years, with a probability of 68%, considering the uncertainties in the demand, capacity, loss parameters and initial construction costs. Finally, appropriate probabilistic engineering demand parameter model formulation is critical for generating accurate loss analysis results.
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