Timber Beams Strengthened by Carbon–Fiber Reinforced Lamellas
| Author(s): |
P. Neubauerová
|
|---|---|
| Medium: | journal article |
| Language(s): | English |
| Published in: | Procedia Engineering, 2012, v. 40 |
| Conference: | Steel Structures and Bridges 2012 |
| Page(s): | 292-297 |
| DOI: | 10.1016/j.proeng.2012.07.097 |
| Abstract: | This paper deals with strengthening timber beams with polymer lamella reinforced by carbon fibers dispersed in the matrix. The influence of the reinforcing on strength and stiffness of the beam was investigated. For the experiments the beams of a common cross section for the structure of ceilings were used – 160x100mm, 140x100mm and 120x100mm with the distance between supports of 3,0 m (the beams acted as simple beam). The cross section of the lamella was chosen according to the possibilities of the manufacturer – 50x1, 2mm. The lamellas were bonded to the beam externally (using special glue based on epoxy resin) in the tension part in the middle of the width. This problem was solved particularly in light of numerical simulation (using some computer program based on the finite element method) and particularly in light of practical analysis. During the experiments the composite material based on connection timber – carbon was tested and the maximal limit force and maximal vertical deformation was measured and each beam was loaded to rupture. Several modes of failure were observed within the experiments – depending on the quality of the timber material, number of knots in the tension part of the cross section, moisture etc. This research is realized in the co-operation with the company of “PREFA KOMPOZITY” at Brno, which deals with the development and research of fiber composites, among others. In light of experimental analysis, results of the pilot tests are presented. |
| Keywords: |
beam reinforcement Reinforcing lamella timber
|
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