Evaluation and Simulation of Seismic Event Risk for Reinforced Concrete Railway Viaducts

• Published in: Concrete Research and Technology Vol. 22; no. 1; pp. 1_33 - 1_42
• Main Authors: Yoshikawa, Hiromichi, Wakabayashi, Yuko, Tsubota, Masaki, Ohtaki, Takeshi
• Format: Journal Article
• Language: Japanese; English
• Published: Japan Concrete Institute 2011
• Subjects: business continuity plan; capacity spectrum method; event-flag matrix method; normal expected loss; provable maximum loss; reinforced concrete railway viaduct; scenario earthquake; seismic event risk curve; seismic hazard analysis
• ISSN: 1340-4733; 2186-2745
• DOI: 10.3151/crt.22.1_33

The present paper proposed the evaluation procedure of seismic risks, which consists of PhaseI:seismic hazard analysis, PhaseII: ground motion at site, PhaseIII:capacity spectrum method, PhaseIV:seismic vulnerability and fragility analysis and PhaseV:seismic event risk analysis. Among these phases, capacity spectrum method and event-flag matrix method are featured in our proposed procedure. Simulations of event risk assessment for two types of reinforced concrete railway viaducts designed by old and present specifications were conducted. Then, major risk indices such as NEL, PML, AEL, and event risk curves are figured out and carefully discussed. It is concluded that these calculated results reflect the directions of railway viaducts as well as differences of seismic performance due to differences of design specifications.