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Erschienen in:
2015 | OriginalPaper | Buchkapitel
3. Analysis by Computer
verfasst von : Baidar Bakht, Aftab Mufti
Erschienen in: Bridges
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Abstract
As discussed in the introduction to Chap. 2, the term is being used in this book for the determination of load effects in the various components of a bridge superstructure subjected to vehicle loads. The methods employed for bridge analysis range in complexity from the overly simplified D-type method of AASHTO (1989) to highly complex finite element methods. The earlier AASHTO simplified method of analysis, because of being too simple, is often excessively conservative. The finite element methods, which require fairly complex computer programs, on the other hand are prone to common errors of idealization and interpretation of results; the former difficulty is discussed with the help of specific examples by Mufti et al. (1994). The large quantity of numerical output associated with finite element analyses also tends to deprive the designer of the physical feel of the behaviour of the structure.