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ABSTRACT: With consideration of the differences between concrete and steel, three solutions using genetic evolutionary structural optimization
algorithm were presented to automatically develop optimal strut-and-tie model for deep beams. In the finite element analysis
of the first method, the concrete and steel rebar are modeled by a plane element and a bar element, respectively. In the second
method, the concrete and steel are assigned to two different plane elements, whereas in the third method only one kind of
plane element is used with no consideration of the differences of the two materials. A simply supported beam under two point
loads was presented as an example to verify the validity of the three proposed methods. The results indicate that all the
three methods can generate optimal strut-and-tie models and the third algorithm has powerful capability in searching more
optimal results with less computational effort. The effectiveness of the proposed algorithm III has also been demonstrated
by other two examples.
Key wordsreinforced concrete deep beam–topology optimization–strut-and-tie model–genetic evolutionary structural optimization
Journal of Central South University of Technology 04/2012; 18(5):1685-1692. · 0.36 Impact Factor
