| dc.description.abstract | This thesis aims to complement the study by Rathiens[25] on two-sided reinforcement in CLT through experimental testing. Additionally, it seeks to investigate the push-in capacity of fully threaded screws, also via experimental testing, with a particular focus on the effects of the screw’s tip and head.
One part of the experimental work involved plate tests where a reinforced CLT member was subjected to a compressive force through a steel plate. The screw spacing varied and corresponded with different sizes of the steel plates. Another aspect of the laboratory work involved testing of a single screw in various configurations to isolate the effects of the tip and head. Tests were conducted on screws that were 8 and 10 mm in diameter and 120 mm in length.
The results from the plate tests were compared with those of Rathiens[25] and the proposed prEN 1995-1-1 model[24]. These results highlighted a significant effect of the enlarged CLT specimens utilized in this thesis, even though the load application area remained the same.
Additionally, the results indicated that the prEN 1995-1-1 model[24] underestimates the contribution of the unloaded area to resist compressive forces.
From the tests examining the effects of the tip and head, both effects were found to be significant, in contrast to the prEN 1995-1-1 model[24], which assumes identical capacities for withdrawal and push-in for screws. The findings also demonstrated significantly higher results
than those predicted by the model, suggesting that it underestimates the push-in capacity of screws. | |
