Service and Ultimate Performance of Simply-Support Precast Composite Beams
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Abstract
This paper aims to carry out an experimental and numerical investigation of the performance of simply supported precast composite beams made of a hot-rolled steel section fixed in concrete. The composite action between steel and concrete was achieved by different web-cutting configurations. Three different web shapes consisting of shark fin- cut, tenon cut and modified clothoidal- cut of web dowel were used to construct the precast concrete beams. Based on the test result, the precast beam with modified clothoidal-cut of web dowel yields the highest characteristics of both stiffness and ultimate capacity as compared with the tenon, and shark-fin cuts, respectively. Predicted loads from non-linear FEA using a concrete damage plasticity model showed a good agreement with the experimental results at peak loads. After the post- peak, the numerical predictions was found to underestimate the load by up to 5%.
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