Parameter Study on Weight Minimization of Network Arch Bridges

  • Rimantas Belevicius Vilnius Gediminas Technical University
  • Algirdas Juozapaitis Vilnius Gediminas Technical University
  • Dainius Rusakevičius Vilnius Gediminas Technical University

Abstract

The article concerns optimization of network arch bridges. This is challenging optimization problem involving even for conventional scheme of network arch bridge the identification of some topological parameters as well as shape configurations and all sizing parameters of structural members, seeking the minimum weight. Optimal bridge scheme is sought tuning a large set of design parameters of diverse character: the type of hanger arrangement, the number of hangers, their inclination angles and placement distances, the arch shape and rise, etc. Mathematically, the optimization of the bridge scheme is a mixed-integer constrained global optimization problem solved employing stochastic evolutionary algorithm. Plane heavy/moderate/and light-deck bridges of 18, 30, 42 and 54 m spans were optimized using proposed optimization technique. The decisive design parameters and their promising ranges were revealed. Also, the influence of some simplifications is shown: changing the arch shape from elliptical to circular, placing the hangers at equal distances, etc.

Keywords

network arch bridge, weight minimization, topology, shape and sizing parameters
Published in Onlinefirst
12-06-2017
How to Cite
BELEVICIUS, Rimantas; JUOZAPAITIS, Algirdas; RUSAKEVIČIUS, Dainius. Parameter Study on Weight Minimization of Network Arch Bridges. Periodica Polytechnica Civil Engineering, [S.l.], v. 62, n. 1, p. 48-55, 2018. ISSN 1587-3773. Available at: <https://pp.bme.hu/ci/article/view/10036>. Date accessed: 21 nov. 2017. doi: https://doi.org/10.3311/PPci.10036.
Section
Research Article