a[mm]/l - Memorial University of Newfoundland DAI

code predrmwmr. the abavs llmll of 40 MPU of the cube strength of Equation (5.5) was
neglccred when calsulat~ng he shear strength.
Norntnd shear strew. vc. according to CEB-FIP (1990) Is'
vc =018 [,+El= (5.6)
Thc hlghcsl conciclc strength conrldcred I" CEB-FlP (1993) 1% SO &%Pa. The control
penmeter Ir !he mnnimum length taken fmm 2d fmm the concentrated load penphery
Equauon (54) can also be used for srlculauon the punch~ng rhear espclty, where. the
penmctcr ho for arcular loaded area IE = x IC + W.
The Nowcgnan code NS-3473 (1992) rpeclfier the punehzng rhcrrcapaclly as
Vd = 0.33(f,d +kAply,)udk,. < 0.66f,udk, 15.7)
where. frd = derngn tenrlle nlrengh of concrete
y, = malenal coefric!enr for reonforced concrete = 1.0
tA = IW Nlmm:
1.0 < k,,l=1.5dldl) < 14. dl = 1.0rn
d = mean platsdspth in the twore~nfommcnt d~rectnons
I = the length of penmeter of the governing reclnon at a dnaancc I 0 dfrom
loaded area
p = lcnrlon re~nforccmcnt ratto.
Compress~ve amngth Is usually given ar. the reference value for a concrete pade.
According to the CEB-FIP (1990) recommendation for mean values. the tcnsllc nmngth
of concrete can be enimavd fmm compresswe strength by: