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Journal of Structural Engineering / Volume 137 / Issue 12 / TECHNICAL PAPERS

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Reliability Acceptance Criteria for Deteriorating Elements of Structural Systems

J. Struct. Eng. 137, 1573 (2011); http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000425 (10 pages)

Daniel Straub1 and Armen Der Kiureghian2

1Associate Professor, Engineering Risk Analysis Group, Technical Univ. Munich, Arcisstr. 21, 80290 München, Germany (corresponding author). E-mail: straub@tum.de
2Taisei Professor of Civil Engineering, Dept. of Civil & Environmental Engineering, Univ. of California, Berkeley, CA 94720. E-mail: adk@ce.berkeley.edu

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(Submitted 27 May 2008; accepted 18 April 2011; posted ahead of print 20 April 2011)

A systematic approach to determining reliability-based acceptance criteria for deteriorating elements in structural systems is proposed as a basis for calibration of safety factors in codes and standards and for verifying acceptability of inspection and maintenance strategies for specific structures. The goal is to establish deterioration acceptance criteria for the elements of a structural system in compliance with criteria formulated for the system. Existing methods significantly overestimate the deterioration reliability of redundant structural systems because they neglect the joint effect of deterioration failures of different elements. To more realistically capture the load-sharing behavior of deteriorating redundant structural systems, it is proposed to establish deterioration acceptance criteria on the basis of easily computable, idealized structural systems, which are calibrated to the characteristics of the real structure. The approach is validated on an example structural system and is found to represent a significant improvement over current methods. The paper concludes with a study of the main factors influencing acceptance criteria of deterioration reliability.

© 2011 American Society of Civil Engineers

Acknowledgments

This work was partially supported by the Swiss National Science Foundation (SNF) through grant PA002-111428.

Article Outline

  1. Introduction
  2. Problem Setting
  3. Target Reliability Indexes for the Structural System
  4. System Model
  5. Modeling Deterioration Failure Events
    1. Modeling Statistical Dependence among Deterioration Failure Events
  6. Investigation of Earlier Models for Developing Deterioration Acceptance Criteria in Redundant Structural Systems
    1. SEI for Daniels System
    2. Numerical Investigations
  7. Acceptance Criteria for Deteriorating Structural Elements in General Redundant Systems
    1. Equivalent Structural Systems
    2. Determination of the Element Acceptance Criterion from the Equivalent System
    3. Validation
    4. Numerical Investigation of Influencing Factors
  8. Concluding Remarks

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ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000425

PUBLICATION DATA

ISSN

0733-9445 (print)  
1943-541X (online)

Publisher

American Society of Civil Engineers

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