def MinReinfAreaUnderTension(concrete,crackCRequirement,spacing,t):
'''Return the minimun amount of bonded reinforcement to control cracking
for reinforced concrete sections under tension.
:param concrete: concrete material.
:param crackCRequirement: crack control requirement.
:param spacing: rebar spacing.
:param t: smallest dimension of the tensioned member.
'''
fctm= concrete.fctm()
kt= SIA262_materials.reductionFactorKT(t) # 4.4.1.3 SIA 262:2014
sgAdm= SIA262_materials.stressLimits(crackCRequirement,spacing)
return kt*fctm*t/sgAdm
def MinReinfAreaUnderFlexion(concrete,concreteCover,crackCRequirement,spacing,t):
'''Return the minimun amount of bonded reinforcement to control cracking
for reinforced concrete sections under flexion.
:param concrete: concrete material.
:param concreteCover: concrete cover of the tensioned bars.
:param crackCRequirement: crack control requirement.
:param spacing: rebar spacing.
:param t: smallest dimension of the tensioned member.
'''
fctd= concrete.fctm()*SIA262_materials.reductionFactorKT(t/3)
z= 0.9*(t-concreteCover)
w= 1/6.0*t**2
sgAdm= SIA262_materials.stressLimits(crackCRequirement,spacing)
return fctd*w/sgAdm/z
