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Structural Engineering and Mechanics Volume 7, Number 6, June 1999 , pages 551-559 DOI: https://doi.org/10.12989/sem.1999.7.6.551 |
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Optimisation of bridge deck positioning by the evolutionary procedure |
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Guan H, Steven GP, Querin OM, Xie YM
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| Abstract | ||
| This paper presents some simple thinking on an age-old question that given a bridge of a certain span and loading, from the point of view of the structural efficiency, where should the bridge deck be positioned? Generally, this decision is made for other reasons than structural efficiency such as aesthetics and the analyst is often presented with a fait accompli. Using the recently invented Evolutional Structural Optimisation (ESO) method, it is possible to demonstrate that having the deck at different vertical locations can lead to a very different mass and shape for each structural form resembling cable-stayed and cable-truss bridges. By monitoring a performance index which is the function of stresses and volume of discretised finite elements, the best optimised structure can be easily determined and the bridge deck positioning problem can be efficiently solved without resorting to any complex analysis procedures. | ||
| Key Words | ||
| bridge deck positioning, evolutionary optimal design, performance index, shape and topology optimization | ||
| Address | ||
| Guan H, Griffith Univ, Sch Engn, Gold Coast Campus, Nathan, Qld 9726, Australia Griffith Univ, Sch Engn, Nathan, Qld 9726, Australia Univ Sydney, Dept Aeronaut Engn, Sydney, NSW 2006, Australia | ||