Experimental and numerical Investigation of Bond between FRP rods and timber

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The results of this research are published in "kassel university press" under the title Untersuchungen zum Verbund zwischen eingeklebten stiftförmigen faserverstärkten Kunststoffen und Holz"

Experimental and numerical Investigation of Bond between FRP rods and timber

Extensive studies on glued-in rods with short bonding lengths were carried out. The studies are part of a bigger research project on post–strengthening of timber connections. This is an important question connected with preservation of cultural heritage. Smaller diameters, better handling concerning preparation and installation, low thermal conduction are the main advantages of FRP–rods compared to threaded steel rods if they are used as glued–in connectors. Retroactive tension-toughened timber joints by glued-in FRP–rods are – because of the precise joint intervention and the reversibility of the intervention – compatible with the basic philosophies in connection with the preservation of historic buildings and structures.

The results of experimental and theoretical investigations proof the potential of post-strengthening of timber nodes by use of fiber-reinforced polymers. Basic rules for practice regarding techologie and dimensioning could be derieved. for numerical calculations. A mathematical algorithm to considerate an incline of the laminate at the calculation of the maximum stress difference at a section between two cracks could be developed.


Funding by "Timber Structures and Building Rehabilitation", University of Kassel