20. Pipebridge refurbishment: cost effective seismic qualification by dynamic isolation
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Published:1991
M. Mandzij, BSc, D. S. Knowland, BSc, 1991. "20. Pipebridge refurbishment: cost effective seismic qualification by dynamic isolation", Civil engineering in the nuclear industry: Proceedings of the conference organized by the Institution of Civil Engineers and held in Windermere on 20–22 March 1991, R Dexter-Smith
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The aim of this paper is to present an appreciation of the way a refurbishment problem was tackled in the firstinstance, subsequently the technical merits of the seismic qualification and finally the system employed to achieve the cost benefits and set targets. The set aim was to provide a cost effective solution to the problem of qualifying an existing pipebridge to an acceptable level of seismic loading. The technical solution to the problem involved the use of a dynamic isolation system, in particular the use of elastomeric bearings to limit the likely levels of dynamic interaction of a multi component system. The practical solution to the problem of refurbishment - the cleaning, strengthening and addition of the isolation system was achieved without the neccesity of providing substantial temporary works to expedite the required solution. A quality system was in use throughout to reinforce the effectiveness of the end result.
SYNOPSIS
1.0 INTRODUCTION
2.0 BACKGROUND TO CASE STUDY
3.0 INITIAL TECHNICAL ASSESSMENT
4.0 ANALYSIS IN DETAIL
5.0 VALIDATION AND TEST
6.0 SUMMARY OF PROJECT DESIGN & ANALYSIS METHODOLOGY
7.0 CONCLUSION
