Optimum topological design of geometrically nonlinear single layer latticed domes using coupled genetic algorithm

Date

2007-11-01

Author

Saka, M. P.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

194
views

0
downloads

Single layer latticed domes are lightweight and elegant structures that provide cost-effective solutions to cover the large areas without intermediate supports. The topological design of these structures present difficulty due to the fact that the number of joints and members as well as the height of the dome keeps on changing during the design process. This makes it necessary to automate the numbering of joints and members and the computation of the coordinates of joints in the dome. On the other hand the total number of joints and members in a dome is function of the total number of rings exist in the dome. Currently no study is available that covers the topological design of dome structures that give the optimum number of rings, the optimum height of crown and the tubular cross-sectional designations for the dome members under the given general external loading. The algorithm presented in this study carries out the optimum topological design of single layer lattice domes. The serviceability and strength requirements are considered in the design problem as specified in BS5950. The algorithm takes into account the nonlinear response of the dome due to effect of axial forces on the flexural stiffness of members. The optimum solution of the design problem is obtained using coupled genetic algorithm. Having the total number of rings and the height of crown as design variables provides the possibility of having a dome with different topology for each individual in the population. It is shown in the design example considered that the optimum number of joints, members and the optimum height of a geodesic dome under a given external loading can be determined without designer's interference. (C) 2007 Published by Elsevier Ltd.

Subject Keywords

Optimum topological design, Shape optimization, Braced domes, Elastic instability, Nonlinear analysis

URI

https://hdl.handle.net/11511/63710

Journal

COMPUTERS & STRUCTURES

DOI

https://doi.org/10.1016/j.compstruc.2007.02.023

Collections

Department of Engineering Sciences, Article

Suggestions

OpenMETU
Core

Optimum topology design of various geometrically nonlinear latticed domes using improved harmony search method Carbas, Serdar; Saka, Mehmet P. (2012-03-01) Domes are elegant and economical structures used in covering large areas. They are built in various forms. According to their form, they are given special names such as lamella, network, and geodesic domes. In this paper, optimum topological design algorithm is presented that determines the optimum number of rings, the optimum height of crown and tubular section designations for the member groups of these domes. The design algorithm developed has a routine that generates the data required for the geometry o...
Optimum geometry design of geodesic domes using harmony search algorithm Saka, M. P. (2007-12-01) The optimum geometry design of geodesic domes presents difficulty due to the fact that the height of the dome keeps on changing during the design process. This in turn makes it necessary to automate the computation of the coordinates of joints in the dome when the height of crown changes. The algorithm presented in this study carries out the optimum geometry design of single layer geodesic domes. It treats the height of the crown as design variable in addition to the cross-sectional designations of members....
Optimum topological design of geometrically nonlinear single layer lamella domes using harmony search method Çarbaş, Serdar; Saka, Mehmet Polat; Department of Engineering Sciences (2008) Harmony search method based optimum topology design algorithm is presented for single layer lamella domes. The harmony search method is a numerical optimization technique developed recently that imitates the musical performance process which takes place when a musician searches for a better state of harmony. Jazz improvisation seeks to find musically pleasing harmony similar to the optimum design process which seeks to find the optimum solution. The optimum design algorithm developed imposes the behavioral ...
Optimum design of double-layer grid systems: comparison with current design practice using real-life industrial applications Aydıncılar, Yılmaz; Hasançebi, Oğuzhan; Department of Civil Engineering (2010) Double-layer grid systems are three-dimensional pin-jointed structures, which are generally used for covering roofs having large spans. In this study, evolution strategies method is used to optimize space trusses. Evolution strategies method is a type of evolutionary algorithms, which simulate biological evolution and natural selection phenomenon to find the best solution for an optimization problem. In this method, an initial population is formed by various solutions of design problem. Then this initial po...
Evaluation of punching shear strength design and modelling approaches for slab-column connections Zorlu, Merve; Binici, Barış; Department of Civil Engineering (2012) Flat plate systems are constructed with slabs directly supported on columns. Since there are no beams in the system, the behavior of connections between the slabs and columns play a crucial role. Due to the sudden and brittle nature of punching shear failures, slab-column connection design must be conducted with proper safety precautions. The first part of this study aims to evaluate the safety level of different design expressions in the codes. Fir this purpose, the ability of ACI 318-11, TS-500 and Euroco...

Citation Formats

M. P. Saka, “Optimum topological design of geometrically nonlinear single layer latticed domes using coupled genetic algorithm,” COMPUTERS & STRUCTURES, pp. 1635–1646, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63710.