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Shape and Sizing Optimization of Steel Trusses Under Dynamic Excitations

BROWSE_DETAIL_CREATION_DATE: 19-06-2018

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BROWSE_DETAIL_TYPE: Thesis

BROWSE_DETAIL_SUB_TYPE: Masters

BROWSE_DETAIL_PUBLISH_STATE: Published

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: TECHNOLOGY, Materials of engineering and construction. Mechanics of materials, Structural engineering (General),

BROWSE_DETAIL_CREATORS: Jawad, Farqad Kamil Jawad (Author),

BROWSE_DETAIL_CONTRIBUTERS: Kazamzadeh Azad, Saeid (Thesis Advisor),

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Design optimization, steel trusses, shape optimization, discrete sizing, evolutionary algorithm, dynamic excitations.


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During the past decades, the main focus of the research in steel truss optimization has been tailored towards optimal design under static loading conditions and limited work has been devoted to investigating the optimum structural design considering dynamic excitations. This thesis addresses the simultaneous shape and sizing optimization problem of steel truss structures subjected to dynamic excitations. Using a contemporary evolutionary algorithm, the minimum-weight design of steel trusses is conducted under both periodic and non-periodic excitations. In the case of periodic excitations, in order to examine the effect of the exciting period of the dynamic load on the final results, the design instances are optimized under different exciting periods and the obtained results are compared. It is observed that by increasing the excitation period of the considered sinusoidal loading as well as the finite rise time of the non-periodic step force, the optimization results approach the minimum design weight obtained under the static loading counterpart. However, in the case of the studied rectangular periodic excitation, the results obtained do not approach the optimum design associated with the static loading case even for higher values of the exciting period.


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