Reliability-based risk factors

  • David G. Elms University of Canterbury, Christchurch, New Zealand

Abstract

Risk factors are used in some codes to allow for the
 higher than normal consequences of the failure of essential
or important structures. A classification of high-risk structures is given, based on different reasons for high importance. Risk factors are then related to reliability factors, defined as the increases in reliability required compared with that for a normal building. By assuming reasonable values for reliability factors, a set of risk
 factors is derived. Some of these correspond closely to those specified in the New Zealand code, while others differ markedly.

References

Code of Practice for General Structural Design and Design Loadings for Buildings, NZS4203:1976, Standards Association of New Zealand, Wellington, 1976.

Cornell, C.A. - "Structural Safety Specifications Based on Second Moment Reliability Analysis", Symposium on Concepts of Structural Safety and Methods of Design, International Association for Bridge and Structural Engineering, London, England, Sept. 1969, pp. 235-246.

Corotis, R.B. and Doshi, V.A. - "Probability Models for Live-Load Survey Results", Proc. ASCE, v 103, n.ST6, June 1977, pp. 1257-1274.

Ditlevsen, O., Generalised Second Moment Reliability Index, Report No. 144, Danish Center for Applied Mathematics and Mechanics, Tech. Univ. of Denmark, Lyngby, Denmark, 1978.

Elms, D.G., "Rational Derivation of Risk Factors", Proc. 7th Australian Conf. on the Mechanics of Structures and Materials, Perth Australia, 1980.

Haas, J.E., Kates, R.W. and Bowden, M.J. - Reconstruction Following Disaster, MIT Press, Cambridge, Mass 1977.

Ingles, O.G., and Saunders, J.R., - "The Concept of Engineering", Proc. 2nd Int. Conf. Applications of Statistics and Probability in Soil and Structural Engineering, v II, Aachen, DGEG, 1975, pp.119-129.

Ingles, O.G., - "Human Factors and Error in Civil Engineering", Proc 3rd. Int. Conf. Applications of Statistics and Probability in Soil and Structural Engineering, Sydney, Australia, 1979, pp.402-417.

Lind, N.C. - "Deterministic Formats for the Probabilistic Design of Structures", An Introduction to Structural Optimisation, Solid Mechanics Study No. 1, Univ. of Waterloo, Canada, 1968.

Lind, N.C. - "Theory of Codified Structural Design", Special Publication, Solid Mechanics Div., Univ. of Waterloo, Canada, 1972.

Lind, N.C. - "Formulation of Probabilistic Design", Proc. ASCE, v.103, n.EM2, April 1977, pp.273-284.

Paulay, T. - "Columns - Evaluation of Actions", Bull. N.Z. Nat. Soc. for Earthquake Engineering, v.10, n.2, June 1977, pp.85-94.

Ravindra, M.K., Lind, N.C. and Siu, W. - "Illustrations of Reliability- Based Design", Proc. ASCE, v.100, n.ST9, Sept. 1974, pp.1789-1811.

Recommended Lateral Force Requirements and Commentary, Structural Engineers Association of California, San Francisco, 1973.

Rosenblueth, E. - "Seismic Design Requirements in a Mexican 1976 Code", Earthquake Engineering and Structural Dynamics, v.7, n.1, 1979, pp.49-61.

Starr, C. - "Social Benefit vs Technical Risk", Science, Am.Ass. Advancement Science, v.165, Sept. 1969, pp.1232-8.

Tentative Provisions for the Development of Seismic Regulations for Buildings: ATC 3-06, Applied Technology Council, Palo Alto, Calif. 1978.

Published
1980-03-31
How to Cite
Elms, D. G. (1980). Reliability-based risk factors. Bulletin of the New Zealand Society for Earthquake Engineering, 13(1), 3-13. https://doi.org/10.5459/bnzsee.13.1.3-13
Section
Articles