Page 37 - Riem-Vol6_nº1

Basic HTML Version

31
IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 1
P. M. LAZZARI | A. CAMPOS FILHO | F. P. S. L. GASTAL | R. A. BARBIERI | R. C. SCHWINGEL
Figure 36 – Crack width along the
sections (mm) - Brazilian code
specification (frequent load combination)
Figure 37 – Deformation of passive reinforcement
layers - French code specification
(rare load combination)
Figure 38 – Cracking table - Brazilian code specification (frequent load combination)
result obtained with the numerical model. Figure 40 shows the graph
relative to transversal displacement along the beam span.
Analyzing the strain graphs of each passive reinforcement layer
according to the French norm, it is observed that layers 4 and 6
present tensile stresses in the 15 sections located at the beam
ends. In these sections, reinforcement layer tensile stress was
compared with limit stress. As the corresponding limit strain is
equal to 1.143‰, that is, approximately 1.45 times higher than the
obtained maximal strain (0.7866‰), beam safety is ensured rela-
tive to SLS-W.
After ULS evaluation, ultimate moment values resulting from ul-
timate loading were compared with resistant moment values.