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Multi-Objective optimization of arch bridges

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dc.contributor.advisor Caitlin T. Mueller. en_US Msaaf, Khaoula en_US
dc.contributor.other Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. en_US 2017-09-15T15:37:46Z 2017-09-15T15:37:46Z 2017 en_US 2017 en_US
dc.description Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017. en_US
dc.description Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (pages 83-84). en_US
dc.description.abstract Trussed arch bridges are commonly used to attain big spans. They are efficient structures that offer a wide range of geometries, materials, and topologies. This thesis studies the influence of the geometry and topology of arch bridges on both their structural performance relayed by the maximum deflection and their structural weight. Various materials are also considered to calculate the embodied carbon emission and investigate the environmental impact of arch bridges. Gustave Eiffel's Garabit Viaduct is used as a design precedent for this study. 2-D and 3-D parametric models of the arch bridge are realized using Grasshopper [8]. Changing the geometric parameters in addition to the topology enables the investigation of the bridge's performance. The cross sections are automatically optimized in each case. Furthermore, a multi-objective optimization process was run on the bridge to examine the tradeoffs between the deflection and the self-weight. The weight-oriented optimization allows saving more than 60% of the weight compared to the original structure. Analyzing the different resulting designs proves that increasing the depth at the arch's crown and the depth at the base of the arch leads to better deflection results. It also demonstrates that using a denser truss structure leads to a lighter structure. en_US
dc.description.statementofresponsibility by Khaoula Msaaf. en_US
dc.format.extent 84 pages en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. en_US
dc.rights.uri en_US
dc.subject Civil and Environmental Engineering. en_US
dc.title Multi-Objective optimization of arch bridges en_US
dc.type Thesis en_US M. Eng. en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. en_US
dc.identifier.oclc 1003324294 en_US

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