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[39240] Artykuł:

Influence of Creep on the Results of Crack Width for Loaded Reinforced Concrete Beams

Czasopismo: Transcom Proceedings 2015 11-th European Conference of Young Researchers and Scientists   Tom: 7, Strony: 304-309
ISSN:  1339-9799
Opublikowano: Czerwiec 2015
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Justyna Tworzewska orcid logoWBiAKatedra Wytrzymałości Materiałów, Konstrukcji Betonowych i Mostowych *****100.00  

Grupa MNiSW:  Recenzowany referat w materiałach konferencyjnych w języku angielskim
Punkty MNiSW: 0



Keywords:

reinforced concrete  crack  creep  beam  system ARAMIS 



Abstract:

The paper presents the influence of creep on the measurement results of the crack width and deflection. Creep occurs in concrete even at very low stress. When measuring the width of cracks with traditional method - Brinell microscope, increase of force must be stopped. It was shown that 7-10 minutes influence of constant load is enough to reveal the effect of creep. An example of analysis was performed on two reinforced concrete beams with symbols R2M-1 and R2M-2. The analysis was possible due to use of modern testing equipment – the 3D optical scanner. The device allowed to measuring the crack width and deflection at the beginning and end of each load increment downtime. It has been shown that in those studies creep resulted in an increase of 8.2% in the average perpendicular crack width, whereas the average deflection increase was 4.4%.