def initControlVars(self,elements):
''' Initialize control variables over elements.
:param elements: elements to define control variables in
'''
for e in elements:
e.setProp(self.limitStateLabel,cv.RCCrackStraightControlVars())
def check(self,elements,nmbComb):
''' For each element in the set 'elememts' passed as first parameter and
the resulting internal forces for the load combination 'nmbComb'
passed as second parameter, this method calculates all the variables
involved in the crack-SLS checking and obtains the crack width.
In the case that the calculated crack width is greater than the
biggest obtained for the element in previous load combinations, this value
is saved in the element results record.
Elements processed are those belonging to the phantom model, that is to
say, of type xc.ZeroLengthSection. As we have defined the variable
fakeSection as False, a reinfoced concrete fiber section is generated
for each of these elements.
'''
if(self.verbose):
lmsg.log("Postprocessing combination: "+nmbComb)
for e in elements:
Aceff=0 #init. value
R=e.getResistingForce()
sct=e.getSection()
sctCrkProp=lscb.fibSectLSProperties(sct)
sctCrkProp.setupStrghCrackDist()
hceff=self.EC2_hceff(sctCrkProp.h,sctCrkProp.d,sctCrkProp.x)
Acgross=sct.getGrossEffectiveConcreteArea(hceff)
Aceff=sct.getNetEffectiveConcreteArea(hceff,"tensSetFb",15.0)
concrete=EC2_materials.concrOfName[sctCrkProp.concrName]
rfSteel=EC2_materials.steelOfName[sctCrkProp.rsteelName]
k2=self.EC2_k2(sctCrkProp.eps1,sctCrkProp.eps2)
# print 'elem= ',e.tag, ' Aceff= ',Aceff
if Aceff<=0:
s_rmax=0
else:
ro_s_eff=sctCrkProp.As/Aceff #effective ratio of reinforcement
s_rmax=self.k3*sctCrkProp.cover+self.k1*k2*self.k4*sctCrkProp.fiEqu/ro_s_eff
#Parameters for tension stiffening of concrete
paramTS= concrete_base.paramTensStiffness(concrMat=concrete,reinfMat=rfSteel,reinfRatio=ro_s_eff,diagType='K')
concrete.tensionStiffparam=paramTS #parameters for tension
#stiffening are assigned to concrete
ftdiag=concrete.tensionStiffparam.pointOnsetCracking()['ft'] #stress at the adopted point for concrete onset cracking
Etsdiag=abs(concrete.tensionStiffparam.regresLine()['slope'])
fiber_sets.redefTensStiffConcr(setOfTenStffConcrFibSect=sctCrkProp.setsRC.concrFibers,ft=ftdiag,Ets=Etsdiag)
e.setProp('ResF',R) #vector resisting force
e.setProp('s_rmax',s_rmax) #maximum crack distance
self.preprocessor.getDomain.revertToStart()
predefined_solutions.resuelveComb(self.preprocessor,nmbComb,self.analysis,1)
for e in elements:
sct=e.getSection()
rfset=sct.getFiberSets()["reinfSetFb"]
eps_sm=rfset.getStrainMax()
srmax=e.getProp("s_rmax")
# eps_cm=concrete.fctm()/2.0/concrete.E0()
# wk=srmax*(eps_sm-eps_cm)
wk=srmax*eps_sm
# print ' eps_sm= ',eps_sm, ' srmax= ', srmax, ' wk= ',wk
# print 'e.getProp(self.limitStateLabel).wk', e.getProp(self.limitStateLabel).wk
if (wk>e.getProp(self.limitStateLabel).wk):
R=e.getProp('ResF')
e.setProp(self.limitStateLabel,cv.RCCrackStraightControlVars(idSection=e.getProp("idSection"),combName=nmbComb,N=-R[0],My=-R[4],Mz=-R[5],s_rmax=srmax,eps_sm=eps_sm,wk=wk))
