Two near-optimal layouts for trusslike bridge structures bearing uniform weight between supports

Cervera Bravo, Jaime and Vázquez Espí, Carlos and Vázquez Espí, Mariano (2014). Two near-optimal layouts for trusslike bridge structures bearing uniform weight between supports. "Journal of Structural Engineering", v. 140 (n. 4); pp. 1-8. ISSN 0733-9445. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000905.

Description

Title: Two near-optimal layouts for trusslike bridge structures bearing uniform weight between supports
Author/s:
  • Cervera Bravo, Jaime
  • Vázquez Espí, Carlos
  • Vázquez Espí, Mariano
Item Type: Article
Título de Revista/Publicación: Journal of Structural Engineering
Date: April 2014
ISSN: 0733-9445
Volume: 140
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Matemática Aplicada a la Ingeniería Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Although the primary objective on designing a structure is to support the external loads, the achievement of an optimal layout that reduces all costs associated with the structure is an aspect of increasing interest. The problem of finding the optimal layout for bridgelike structures subjected to a uniform load is considered. The problem is formulated following a theory on economy of frame structures, using the stress volume as the objective function and including the selection of appropriate values for statically indeterminate reactions. It is solved in a function space of finite dimension instead of using a general variational approach, obtaining near-optimal solutions. The results obtained with this profitable strategy are very close to the best layouts known to date, with differences of less than 2% for the stress volume, but with a simpler layout that can be recognized in some real bridges. This strategy could be a guide to preliminary design of bridges subject to a wide class of costs.

More information

Item ID: 40241
DC Identifier: http://oa.upm.es/40241/
OAI Identifier: oai:oa.upm.es:40241
DOI: 10.1061/(ASCE)ST.1943-541X.0000905
Official URL: http://ascelibrary.org/doi/10.1061/%28ASCE%29ST.1943-541X.0000905
Deposited by: Memoria Investigacion
Deposited on: 04 Oct 2016 07:49
Last Modified: 04 Oct 2016 07:49
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