Influence of Contact of Damaged Reinforced Concrete Beam and Strengthening Slab for Deformation and Resistance of Reinforced Element in the Long-Term Loading

Abstract:

Experimental and theoretical research oriented on the influence of the time factor to limit states of damaged and then reinforced beams by the strengthening slab. In experiments there were performed two types of contact - reinforced contact (beams ST) "damaged beam / strengthening slab", respectively unreinforced contact with geometric indented modification (beams Z). Both types are based on rules EC2 for short-term load. The results are compared with short-term tests of both types of contact. In long-term studies, we have used as comparative values results for unreinforced beams (beams LTL-n). In both cases the creep coefficients are set for the following variables - total deflection a (tot), and the deflections a (sh) of shear, and the a (fl) the bending moment, the shear deformation γ, curvature ρ. All tests were carried out at the level of loading γ = 0.50. The determining of the creep coefficients was based on the experimental deformation of the fictitious truss system, which have been processed by Williot-Mohr translocation patterns. The results form the input values for the experimental elements in repetitive loading at the same level load.

• Periodical: Key Engineering Materials (Volume 738)
• Pages: 164-174
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.738.164
• Online since: June 2017
• Authors: Martin Krizma*, Lubomir Bolha, Martin Moravcik, Matus Holubek
• Keywords: Influence of Time Factor on Deformation Quantities, Influence of Time Factor on Resistance of Beams, Linear Concrete Elements, Long-Term Loading, Non-Strengthened Beams, Short-Term Loading, Strengthened Beams, Strengthening by Composite Slab, Type of Contact

References

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DOI: 10.4028/www.scientific.net/kem.691.51

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DOI: 10.4028/www.scientific.net/kem.691.51