Life-cycle management of bridges under seismic and airborne chloride hazards

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360185
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Waseda University
• Principal Investigator: Akiyama Mitsuyoshi 早稲田大学, 理工学術院, 教授 (00302191)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Yoshikazu 京都大学, 工学研究科, 准教授 (10283623) ; ONO Kiyoshi 早稲田大学, 理工学術院, 教授 (60324802)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: ライフサイクル解析 / 地震ハザード / 塩害 / 鉄筋コンクリート構造 / じん性評価

Outline of Final Research Achievements

The evaluation of the displacement ductility capacity based on the buckling model of longitudinal rebars in corroded RC bridge piers is established, and a novel computational procedure to integrate the probabilistic hazard associated with airborne chlorides into life-cycle seismic reliability assessment of these piers is proposed. Whereas the seismic demand depends on the results of seismic hazard assessment, the deterioration of seismic capacity depends on the hazard associated with airborne chlorides. In an illustrative example, a RC bridge pier was modeled as single degree of freedom. The longitudinal rebars buckling of this pier was considered as the sole limit state when estimating its failure probability. The findings show that the life-cycle reliability of RC bridge piers depends on both the seismic and airborne chloride hazards, and that the cumulative-time failure probabilities of RC bridge piers located in seismic zones can be affected by the effect of airborne chlorides.

Free Research Field

構造工学