Communications - Scientific Letters of the University of Zilina 2011, 13(3):9-13 | DOI: 10.26552/com.C.2011.3.9-13

Investigation on Cracks Creation and Propagation in Concrete Slab of Composite Beams

Jan Bujnak1, Kazimierz Furtak2
1 Faculty of Civil Engineering, University of Zilina
2 Cracow University of Technology, Krakow, Poland

Analytical and experimental research have illustrated initiation of cracks in concrete deck immediately after its casting and placing on the upper flange of steel beams, especially prior to application of additional permanent load on composite element. Not only value of concrete shrinkage strain may influence creation and propagation of cracks in concrete. However ratio of deck reinforcement, cross-sectional area of reinforcement steel and strength of concrete can modify the process. Moreover, the ratio of steel beam flexural stiffness and flexural stiffness of concrete deck can be significant. Important shrinkage strains can occur at the lower concrete surface in the steel and concrete interface. Parametrical studies have provided the relationships illustrating impact of above parameters on crack aspect. The aim of the paper is to provide further details.

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Published: September 30, 2011  Show citation

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Bujnak, J., & Furtak, K. (2011). Investigation on Cracks Creation and Propagation in Concrete Slab of Composite Beams. Communications - Scientific Letters of the University of Zilina, 13(3), 9-13. doi: 10.26552/com.C.2011.3.9-13
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    References

    1. Eurocode 4: Design of Composite Steel and Concrete Structures: Part 1-1. General Rules and Rules for Buildings; Part 2. Bridges.
    2. DUCRET, J.M., LENET, J., P.: Effects of Concrete Hydration on Composite Bridges. Conference Report: Composite Construction o Conventional and Innovative. Innsbruck. September, 1997.
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    5. JAREK, B.: Cracking of Reinforce Concrete Slab in Beams of Composite Steel and Concrete Type (in Poland), Doktorand thesis, Politechnika Krakowska.

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