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

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  • キャパシティスペクトル法とEFM法を援用したRCラーメン高架橋の地震イベントリスク評価
  • キャパシティスペクトルホウ ト EFMホウ オ エンヨウ シタ RC ラーメン コウカキョウ ノ ジシン イベントリスク ヒョウカ

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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.

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