caa a22 4500 465740898 CHVBK 20180323111808.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF00036274 doi (NATIONALLICENCE)springer-10.1007/BF00036274 Photoelastic and theoretical analyses of cracked frames [Elektronische Daten] [S. Abdel-Salam, M. El-Haddad] Photoelastic and theoretical analyses have been carried out to investigate the effect of cracks on the behaviour of two hinged portal frames subjected to two symmetrical vertical concentrated loads. The distribution of internal shear and normal stresses are obtained at different sections at various crack depth ratio. Also, values of stress intensity factor are obtained based on the measured local stress values. Based on the present result, an increase in normal stresses occurred at sections far from the crack location and a decrease in stresses occurred at sections close to the crack location. This is due to the fact that a redistribution in internal forces occurred due to crack presence. It is also noticed that a localized shear stress is created in a pure bending zone due to crack presence, the size of this zone is increased as crack size increased. Good agreement is obtained between experimental and theoretical results. Kluwer Academic Publishers, 1990 Abdel-Salam S. Department of Structural Engineering, Zagazig University, Egypt aut El-Haddad M. Department of Structural Engineering, Cairo University, Egypt aut International Journal of Fracture Kluwer Academic Publishers 45/4(1990-10-01), 311-321 0376-9429 45:4<311 1990 45 10704 https://doi.org/10.1007/BF00036274 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00036274 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdel-Salam S. Department of Structural Engineering, Zagazig University, Egypt aut NATIONALLICENCE 700 1- El-Haddad M. Department of Structural Engineering, Cairo University, Egypt aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 45/4(1990-10-01), 311-321 0376-9429 45:4<311 1990 45 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer