Risk sensitivity applied to arch bridge assessments: an introduction.

Ng, Kwooi-Hock, Fairfield, Charles A and Sibbald, A (2001) Risk sensitivity applied to arch bridge assessments: an introduction. The Structural Engineer, 79 (18). pp. 31-37. ISSN 1466 5123

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There are approximately 75,000 masonry arch bridges in the UK, most of which were built between 1700 and 1900 and are now carrying traffic loads far beyond those envisaged by the original designers and builders. A question has to be asked as to whether nominally identical arches will yield identical collapse loads. Large scale tests have been carried out by various researchers, but repeatability tests at this scale have not been carried out because of cost. It was therefore deemed necessary to conduct a series of repeatability tests on large scale arches to give engineers an idea of the reliability of assessed capacities. 3 nominally identical laboratory brickwork arch bridges were built and tested to collapse. The arches collapsed at 21kNm(super-1), 16kNm(super-1) and 25kNm(super-1). 6 arch bridge assessment methods, including 2 novel risk assessment programs coded by the authors, were used to analyse the arches. It was concluded that nominally identical arches may show significantly different behaviour. Statistical analyses should be performed so that the risk involved in assessing an arch, either due to imperfect modelling or variability of the input parameters, can be quantified, thereby making the assessment more reliable.

Item Type: Article
Print ISSN: 1466 5123
Uncontrolled Keywords: Arch bridges; Compression testing; Structural loads; Traffic flow; Statistical analysis; Construction costs; Sensitivity; Reliability; Masonry; Mathematical models; Risk assessment
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 500 Science > 510 Mathematics > 510 Mathematics
600 Technology > 620 Engineering > 624 Civil engineering
Library of Congress Subjects: T Technology > TG Bridge engineering
Q Science > QA Mathematics
Item ID: 1938
Depositing User: RAE Import
Date Deposited: 19 Feb 2008 15:34
Last Modified: 27 Jan 2015 08:52

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