Abstract
AbstractThe well-known ‘ground structure’-based truss layout optimization method has recently been extended to allow accurate modelling of distributed self-weight. By incorporating equally stressed catenaries in the ground structure, non-conservative errors caused by neglecting bending effects within members carrying their own weight are eliminated. However, in cases where the self-weight of a structure has a favourable role in supporting the applied loads, solutions that include convoluted arrangements of overlapping elements may often be generated. To address this, an enhanced layout optimization formulation is proposed that explicitly allows inclusion of favourable unstressed masses, such as counterweights. Frictional supports are also modelled and the cost of abutments and anchorages taken account of in the formulation. The efficacy of the proposed methodology is demonstrated through application to benchmark examples and to the conceptual design of a simplified long-span bridge structure, considering both ground anchored and self-anchored alternatives.
Funder
Engineering and Physical Sciences Research Council
Publisher
Springer Science and Business Media LLC
Subject
Control and Optimization,Computer Graphics and Computer-Aided Design,Computer Science Applications,Control and Systems Engineering,Software
Reference37 articles.
1. Beghini A, Baker WF (2015) On the layout of a least weight multiple span structure with uniform load. Struct Multidisc Optim 52(3):447–457
2. Bendsøe MP, Sigmund O (1995) Optimization of structural topology, shape, and material. Springer, Berlin
3. Brancaleoni F, Diana G, Fiammenghi G, Jamiolkowski M, Marconi M, Vullo E (2011) Messina bridge, design, concept, from early days to present. Taller. Longer, Lighter, IABSE-IASS symposium London, Special session on the Messina bridge, pp 15–23
4. Chan HSY (1975) Symmetric plane frameworks of least weight. In: Optimization in structural design, Springer, pp 313–326
5. Croll JGA (1997) Thoughts on the structural efficiency of cable-stayed and catenary suspension bridges. Struct Eng 75(10):173–175
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