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Practical Method of Reliability-based Assessment and Design of a Structure with Long Service Life

Research Project

Project/Area Number 15560491
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionNagoya University

Principal Investigator

MORI Yasuhiro  Nagoya University, School of Environmental Studies, Assoc.Professor, 環境学研究科, 助教授 (30262877)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsStructural Reliability / Limit State Design / Long Service Live / Load and Resistance Factors / Load Combination / Stochastic Process / Structural Degradation / Inspection and Maintenance / 基準期間
Research Abstract

Because of their enormous numbers, extending the service life of building structures designed by an ordinary structural engineer is one of the most important factors for achieving sustainable society. However, the length of service life of a structure is not considered explicitly in current design provisions. In reliability-based limit state design, the performance level of a structure can be controlled by differentiating load and resistance factors considering the length of service and the variability in load intensity and structural capacity. A practical method for evaluating load and resistance factors is proposed in "Recommendation for Limit State Design of Buildings" by AIJ. However, because of the simple approximation of non-lognormal random variables to lognormal, the reference period is fixed as 50 years, and accordingly, the recommendation cannot be properly used for designing a structure with longer service life.
Also a structure could deteriorate due to environmental stressors and repeated loading. Such deterioration may not be a problem for a structure with short service live, but should be considered for a structure with long service life. However, again no existing design code considers the deterioration of a structural performance during its service life.
For the degradation of structural performance, the investigator has introduced the concept of a resistance factor with which a time-dependent reliability problem can be approximated as a time-independent one. In this research, a practical formula for a resistance reduction factor is proposed classifying the cumulative distribution functions according to the classification of parent distributions of extreme value distributions. Also, an improved simple approximation method, which can consider the service life of a structure, for load and resistance factors is proposed using AFOSM directly. The accuracy and its applicability are investigated using numerical examples.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (16 results)

All 2005 2004 2003 2000 Other

All Journal Article (10 results) Publications (6 results)

  • [Journal Article] 荷重・耐力係数の略算方と分離係数の評価精度2005

    • Author(s)
      森 保宏, 丸山 裕
    • Journal Title

      日本建築学会構造系論文集 第589号

      Pages: 15-22

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 限界状態設計法における荷重・耐力係数の略算法に関する研究2004

    • Author(s)
      丸山 裕, 森 保宏
    • Journal Title

      日本建築学会大会学術講演梗概集 B-1

      Pages: 179-180

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] A Study on Practical Method for Load and Resistance Factors for Use in Limit State Design2004

    • Author(s)
      Maruyama, Y., Mori, Y.
    • Journal Title

      Summary of Technical Papers of Annual Meeting, AIJ B-I

      Pages: 179-180

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 劣化影響係数を用いた既存構造物における点検・補修計画の最適化2003

    • Author(s)
      加藤隆広, 森 保宏
    • Journal Title

      日本建築学会大会学術講演梗概集 B-1

      Pages: 29-30

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Practical Method of Reliability-based Condition Assessment of Existing Structures2003

    • Author(s)
      Mori, Y., Kato, T.
    • Journal Title

      Application of Probability and Statistics in Civil Engineering 第5号

      Pages: 613-620

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 劣化影響係数を用いた構造物の実用的な信頼性評価手法,構造物の安全性および信頼性2003

    • Author(s)
      森 保宏, 加藤隆広
    • Journal Title

      構造物の安全性および信頼性 第5号

      Pages: 497-502

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Inspection/repair Strategy for an Existing Structure Optimization using Degradation Factor2003

    • Author(s)
      Kato, T., Mori, Y.
    • Journal Title

      Summary of Technical Papers of Annual Meeting, AIJ B-I

      Pages: 29-30

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Practical Method of Reliability-based Condition Assessment of Existing Structures2003

    • Author(s)
      Mori, Y., Kato, T.
    • Journal Title

      Application of Probability and Statistics in Civil Engineering Vol.5

      Pages: 613-620

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Practical Method of Reliability-based Condition Assessment of Structures Using Degradation Factor2003

    • Author(s)
      Kato, T., Mori, Y.
    • Journal Title

      Proc.5th Japan Conf.on Structural Safety and Reliability Vol.5

      Pages: 497-502

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Simplified Method for Load and Resistance Factors and Accuracy of Sensitivity Factors2000

    • Author(s)
      Mori, Y., Maruyama, Y.
    • Journal Title

      Summary of Technical Papers of Annual Meeting, AIJ B-I

      Pages: 19-20

    • NAID

      110004839649

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Bhargava, K., Ghosh, A.K., Mori, Y., Ramanujam, M.: "Analytical Model of Corrosion-Induced Cracking of Concrete Considering the Stiffness of Reinforcement"Structural Engineering and Mechanics. 16-6. 749-769 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 加藤隆広, 森 保宏: "劣化影響係数を用いた既存構造物における点検・補修計画の最適化"日本建築学会大会学術講演梗概集. B-1. 29-30 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mori, Y, Kato, K.: "Practical Method of Reliability-based Condition Assessment of Existing Structures"Application of Probability and Statistics in Civil Engineering. 第5号. 613-620 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 花井 勉, 福和伸夫, 森 保宏, 皆川隆之: "免震層変位を制限した戸建て免震住宅の耐震等級対応法とライフサイクルコスト評価"日本建築学会構造系論文集. 第572号. 89-96 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 森 保宏, 加藤隆広: "劣化影響係数を用いた構造物の実用的な信頼性評価手法,構造物の安全性および信頼性"構造物の安全性および信頼性. 第5号. 497-502 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 加藤隆広, 森 保宏: "既存構造物の信頼性評価に用いる劣化影響係数の実用的評価手法"日本建築学会東海支部研究報告集. 第41号. 161-164 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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