| Abstract [eng] |
Over many year of use, buildings wear out, causing damage, cracks and deformation, which greatly reduce the strength and stability of the supporting structures. Quite often, the purpose of buildings is changed, resulting in a significant increase in the working load on the load-bearing structures. For the reasons mentioned, buildings need to be reconstructed or rebuilt. During the reconstruction of buildings, part of the supporting structures may be replaced by new ones. Very often, the building has load-bearing structures, which would require quite a lot of demolition of the existing building, if you were about to replace them. Taking this into consideration, for economic reasons, the existing load-bearing structures in the building under reconstruction, need to be strengthened. Recently, various composite materials and articles have been used more and more frequently and applied to the appropriate, usually tensile layer of reinforcing structures. During the experiment, nine MU-14 lintels were flexed. The three beams were reinforced with carbon fiber lamellae, other three beams with steel bands, and the remaining three beams were benchmarks for comparing flexural strength and deflection. In this work the strength and deflection of the beams were tested and calculated by experimental method, theoretical calculation and computer program. The results obtained were compared and provided insight on how much the strength of the reinforced beams increased and the deflection with one and the other material decreased. Prices for reinforced beam materials are provided and a more cost effective option for reinforcement is calculated. |
