Cellular beams became increasingly popular as an efficient structural form in
steel construction since their introduction. Their sophisticated design and
profiling process provides greater flexibility in beam proportioning for
strength, depth, size and location of circular holes. The purpose of
manufacturing these beams is to increase overall beam depth, the moment of
inertia and section modulus, which results in greater strength and rigidity.
Cellular beams are used as primary or secondary floor beams in order to
achieve long spans and service integration. They are also used as roof beams
beyond the range of portal-frame construction, and are the perfect solution for
curved roof applications, combining weight savings with a low-cost
manufacturing process.
The purpose of the current research is to study optimum design, ultimate load
capacity under applied load and finite element analysis of non-composite
cellular beams. The first part of the research program focuses on the optimum
design of steel cellular beams using one of the stochastic search methods called
&ldquo / harmony search algorithm&rdquo / . The minimum weight is taken as the design
objective while the design constraints are implemented from the Steel
Construction Institute. Design constraints include the displacement limitations,
overall beam flexural capacity, beam shear capacity, overall beam buckling
strength, web post flexure and buckling, vierendeel bending of upper and lower
tees and local buckling of compression flange. The design methods adopted in
this publication are consistent with BS5950. In the second part of the research,
which is the experimental work, twelve non-composite cellular beams are
tested to determine the ultimate load carrying capacities of these beams under
using a hydraulic plug to apply point load. The tested cellular beam specimens
have been designed by using harmony search algorithm. Finally, finite element
analysis program is used to perform elastic buckling analysis and predict
critical loads of all steel cellular beams. Finite element analysis results are then
compared with experimental test results for each tested cellular beam.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613007/index.pdf |
| Date | 01 February 2011 |
| Creators | Erdal, Ferhat |
| Contributors | Tokdemir, Turgut |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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