Conception of Post-Tensioning in Concrete Bridge Engineering using Optimization Methods – Basic and Examples
Author(s): |
Siegfried Seipelt
Roland Friedl |
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Medium: | conference paper |
Language(s): | English |
Conference: | 35th Annual Symposium of IABSE / 52nd Annual Symposium of IASS / 6th International Conference on Space Structures: Taller, Longer, Lighter - Meeting growing demand with limited resources, London, United Kingdom, September 2011 |
Published in: | IABSE-IASS 2011 London Symposium Report |
Year: | 2011 |
Abstract: |
The process of finding the optimal run and force of prestressing strands within the entire length of prestressed concrete bridges is by now largely controlled by the experience of the planning engineer. Due to the strong influence of the particular parameters of prestressing on the longitudinal stresses of the whole structure, there is a demand for an elaborate, iterative search for an optimal prestressing, especially within statically indeterminate load-bearing systems of sectionally- constructed bridges. This paper shows how the conception of prestressing can be performed and at the same time, optimized through the use of non-linear numerical methods. With reference to planned bridges, the considerable potential of this numerical drafting method is demonstrated. |
Keywords: |
post-tensioning non-linear optimization conception of prestressing
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