By C. Melbourne

Within the 20th century bridge engineers have obvious many alterations. Advances in expertise, fabrics and engineers figuring out of structural behaviour and strategies of study has provided possibilities for innovation and feature ended in more and more refined options to the elemental challenge of delivering a bridge over a disadvantage.

However, regardless of those cutting edge technological alterations, the masonry arch bridge has proven itself to be a sturdy, cost effective constitution, tolerant of its sleek atmosphere and out-performing a lot of its rivals

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Additional info for Arch bridges : proceedings of the First International Conference on Arch Bridges, held at Bolton, UK on 3-6 September 1995

Example text

In the same period, with British Rail's and also later the Department of Transport's support, Dr B S Choo and his colleagues at Nottingham University made wide ranging applications of 1, 2 and 3-dimensional versions of the finite element method [12] to predict the ultimate load capacity of arch bridges of various configurations and with a variety of defects. 19. To summarise, a number of sophisticated methods now exist for calculating the ultimate load capacity of arch bridges by directly carrying out failure analysis.

The coal seams were of poor quality and showed no evidence of having been worked. The report recommended a safe bearing capacity of 600 kN/m2 could be expected in both the sandstone and mudstone beds. THE STRUCTURE A number of outline general arrangement type sketches were produced for the client's consideration. It was the client's wish that bridge should not only "sit" comfortably within its surrounds but should also reflect something of the canal era of the past. An arch type of structure, which would benefit from the restraint provided by the massive mudstone beds coupled with its long span ability evolved as the principal alternative.

I hope to show that this has led to the progressive development of a cavalier attitude towards the analytical resuits which are available for arches. I will do so by first exploring the results for a particular group of tests and then by re-visiting the comparative results presented in BD21/932. THE DUNDEE ARCH BRIDGE A 4m span semi circular arch bridge was built in the laboratory at the University of Dundee3. Figure 1 shows the leading dimensions of the structure. The arch was built from pre-cast concrete voussoirs on a timber centre, the spandrels from concrete brick.

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