A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic fragility and cost analyses of actively controlled structures
Seismic fragility represents the probability that structural response exceeds a given performance limit state due to a specified intensity of ground motion, and it has a direct relationship with the cost of rehabilitating the structural system. In this research, a cost analysis framework based on seismic fragility to quantify the expected loss of the structural system was proposed. Incremental dynamic analysis was used to generate the fragility curves, and plastic strain derived from plastic energy dissipation was used to quantify the structural damage at a local level. Two moment‐resisting steel frames and 100 nonstationary Gaussian earthquake ground motions were simulated, and correlations between local damage states and global performance limit states were performed to facilitate the cost analysis study. The results showed that good correlations exist in seismic fragilities, and therefore, the repair cost of the structural system becomes quantifiable. Active control based on the optimal linear control algorithm was included as an auxiliary study to identify the sensitivity of the correlations. It is observed that significant cost reduction can be achieved for structures with few stories when active control is used but may not be cost‐effective if it is installed in taller structures. Published 2011. This article is a US Government work and is in the public domain in the USA.
Seismic fragility and cost analyses of actively controlled structures
Seismic fragility represents the probability that structural response exceeds a given performance limit state due to a specified intensity of ground motion, and it has a direct relationship with the cost of rehabilitating the structural system. In this research, a cost analysis framework based on seismic fragility to quantify the expected loss of the structural system was proposed. Incremental dynamic analysis was used to generate the fragility curves, and plastic strain derived from plastic energy dissipation was used to quantify the structural damage at a local level. Two moment‐resisting steel frames and 100 nonstationary Gaussian earthquake ground motions were simulated, and correlations between local damage states and global performance limit states were performed to facilitate the cost analysis study. The results showed that good correlations exist in seismic fragilities, and therefore, the repair cost of the structural system becomes quantifiable. Active control based on the optimal linear control algorithm was included as an auxiliary study to identify the sensitivity of the correlations. It is observed that significant cost reduction can be achieved for structures with few stories when active control is used but may not be cost‐effective if it is installed in taller structures. Published 2011. This article is a US Government work and is in the public domain in the USA.
Seismic fragility and cost analyses of actively controlled structures
Wong, Kevin K. F. (author) / Harris, John L. (author)
The Structural Design of Tall and Special Buildings ; 22 ; 569-583
2013-05-01
15 pages
Article (Journal)
Electronic Resource
English
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