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The Structural Engineer
Citation

The Structural Engineer, Volume 83, Issue 5, 2005

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The Structural Engineer, Volume 83, Issue 5, 2005

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Members/Subscribers: Free

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The Institution of Structural Engineers

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Issue 5

Related Resources & Events

The Structural Engineer
<h4>The use of reliability analysis to aid bridge management</h4>

The use of reliability analysis to aid bridge management

This paper reviews the use of reliability techniques for assessing the structural adequacy of bridges and highlights how the output of such an analysis can both inform and guide the user in their investigation of a structure. Three different ways of interpreting the value of reliability indices are identified and the feasibility of using each of these to prioritise repair and strengthening works is examined. An average acceptable value (AAV) of reliability index for different bridge types and failure modes is proposed and it is shown that in some cases priorities can be identified directly by comparing reliability indices, sometimes a measure of the significance of the reliability index is needed, while in other cases priorities are still not obvious and further investigation is required. To achieve this, the principles of risk management are explored and it is shown that where two or more structures have similar reliabilities, consideration of risk does represent a feasible approach. Robert J. Lark, BSc(Eng), PhD, CEng, MICE Cardiff School of Engineering, Cardiff University, UK Dipl.-Ing Katja D. Flaig, PhD Allianz, Munich, Germany

Author – Lark, Robert J;Flaig, Katja D
Price – £10
The Structural Engineer
<h4>Offshore structures</h4>

Offshore structures

The offshore oil industry is still a comparatively young sector of structural engineering. The first oilfield offshore structures were installed just over 50 years ago in 4m water depth in the Gulf of Mexico. In the last 50 years some 9000 shallow water platforms have been built and the industry is now developing in very deep water. This paper provides an overview of offshore structural engineering through reference to the principle forms of offshore structure and their key design and operational requirements and the floating and sub sea structures that are making it possible to develop oilfields in 2km water depths. Richard Snell, FREng, FICE BP Exploration

Author – Snell, Richard
Price – £10