| dc.description.abstract | The master's thesis is written in collaboration with the project FiberCon. The purpose of the project is to develop solution methods that are sustainable and economical for concrete structures. The master's thesis is about fiber reinforcement in combination with conventional bar reinforcement in load-bearing structural parts.
Fiber reinforcement has given good results in concrete structures such as higher capacity in use and fracture limit condition, compact concrete, high durability, slimmer construction cross-sections and being less exposed to rust. These are the reasons why fiber reinforcement is desired in more areas of use than it is used for today.
The researcher question was to find the residual and ductility classes that are most favourable in terms of the properties of the fiber concrete in both (SLS)and ultimate limit state service limit state (ULS). To research this, calculations have been performed in accordance with NB Publication no. 38 together with Eurocode 2 and the computer program Isy Design.
The results in this thesis show that high concrete strength classes together with low residue and ductility classes satisfy the absolute minimum requirements for load-bearing structural parts better than in relation to high concrete strength classes and high residue and ductility classes. They will be the most optimal for saving on material use.
The residual strength classes depend on the amount of fiber, and with a higher residual strength class you get higher capacity in the ultimate limit state (ULS) and significantly less crack width in the service limit state (SLS). Results show that increasing residual strength classes are more effective against crack widths. | |