Reliability-based design and limit state design in geotechnical engineering

The reliability-based design of shallow foundations is generally implemented via a load and resistance factor design methodology embedded in a limit state design framework. For any particular limit state, the design proceeds by ensuring that the factored resistance equals or exceeds the factored load effects. Load and resistance factors are determined to ensure that the resulting design is sufficiently safe. Load factors are typically prescribed in structural codes and take into account load uncertainty. Factors applied to resistance depend on both uncertainty in the resistance (accounted for by a resistance factor) and desired target reliability (accounted for by a newly introduced consequence factor). This paper concentrates on how the consequence factor can be defined and specified to adjust the target reliability of a shallow foundation designed to resist bearing capacity failure.

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Limit state design in geotechnical engineering

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(82)91162-7 ◽

1982 ◽

Vol 19 (3) ◽

pp. 49

Keyword(s):

Geotechnical Engineering ◽

Limit State ◽

Limit State Design

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Reliability-Based Tubing and Casing Design: Principles and Approach

Journal of Offshore Mechanics and Arctic Engineering ◽

10.1115/1.2829105 ◽

1997 ◽

Vol 119 (4) ◽

pp. 257-262 ◽

Cited By ~ 1

Author(s):

M. A. Maes ◽

K. C. Gulati ◽

P. R. Brand ◽

D. B. Lewis ◽

D. L. McKenna ◽

...

Keyword(s):

Stochastic Modeling ◽

Oil And Gas ◽

Limit State ◽

Design Principles ◽

Gas Wells ◽

Limit States ◽

Risk Levels ◽

Limit State Design ◽

Reliability Based Design ◽

Oil And Gas Wells

This paper describes the development of an LRFD format reliability-based design of tubulars used in oil and gas wells. The approach is based on the principles of limit state design. The paper identifies the applicable limit states of pipe performance, discusses stochastic modeling of the load and resistance variables, and describes calibration of the design check equations. The calibration considers various combinations of hardware configurations, loadings, and tubular application zones with their respective risk levels. Application of the design principles is illustrated with an example problem.

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Reliability-Based Casing Design

Journal of Energy Resources Technology ◽

10.1115/1.2835336 ◽

1995 ◽

Vol 117 (2) ◽

pp. 93-100 ◽

Cited By ~ 3

Author(s):

M. A. Maes ◽

K. C. Gulati ◽

D. L. McKenna ◽

P. R. Brand ◽

D. B. Lewis ◽

...

Keyword(s):

Risk Analysis ◽

Stochastic Modeling ◽

Limit State ◽

Design Criteria ◽

Limit States ◽

Gas Well ◽

Quantitative Risk Analysis ◽

Limit State Design ◽

Reliability Based Design ◽

Calibration Techniques

The present paper describes the development of reliability-based design criteria for oil and/or gas well casing/tubing. The approach is based on the fundamental principles of limit state design. Limit states for tubulars are discussed and specific techniques for the stochastic modeling of loading and resistance variables are described. Zonation methods and calibration techniques are developed which are geared specifically to the characteristic tubular design for both hydrocarbon drilling and production applications. The application of quantitative risk analysis to the development of risk-consistent design criteria is shown to be a major and necessary step forward in achieving more economic tubular design.

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