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2. Framework for estimating the risk and resilience of road networks with bridges and embankments under both seismic and tsunami hazards

Author

Hiroki Ishibashi, Mitsuyoshi Akiyama, Shunichi Koshimura, Takayuki Kojima, Kengo Nanami, and Dan M. Frangopol

Subjects
021110 strategic, defence & security studies, business.industry, Mechanical Engineering, Disaster mitigation, Environmental resource management, 0211 other engineering and technologies, 020101 civil engineering, Ocean Engineering, 02 engineering and technology, Building and Construction, Geotechnical Engineering and Engineering Geology, 0201 civil engineering, Seismic hazard, Tsunami hazard, Risk and resilience, Road networks, Environmental science, Safety, Risk, Reliability and Quality, Resilience (network), business, Civil and Structural Engineering
Abstract

To develop disaster mitigation measures in coastal regions affected by earthquakes, it is important to consider the effects of both seismic and tsunami hazards on road structures and assess the soc...

Published
2020
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3. Risk Estimation of Bridges and Bridge Networks Under Seismic and Subsequent Tsunami Hazards

Author

Kengo Nanami, Hiroki Ishibashi, Takayuki Kojima, Mitsuyoshi Akiyama, and Dan M. Frangopol

Subjects
Prioritization, Strong ground motion, Estimation, Seismic hazard, business.industry, Road networks, Forensic engineering, Retrofitting, business, Geology, Bridge (nautical), Risk management
Abstract

A procedure for estimating risk of road structures subjected to seismic ground motion and subsequent tsunami is proposed. In the 2011 Great East Japan earthquake, many bridges and embankments were severely damaged due to the strong ground motion and/or subsequent tsunami. The damage to these structures caused significant economic losses associated with the reconstruction and disruption of the road network. Given a limited budget, it is important to estimate the economic loss due to the damage to structures in road networks and determine the retrofitting prioritization for effective risk mitigation. In an illustrative example, the risk of road networks under both seismic and tsunami hazards caused by the anticipated Nankai Trough earthquake is estimated. The numerical results show that the retrofitting prioritization can be determined by comparing the risk of road networks.

Published
2020
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