# kCff_11
# kCff_11_num=3
c += 1
kCffr[c] = row+0
kCffc[c] = col+0
kCffv[c] += 0.5*a*kt*rAu*rBu*sAu*sBu
c += 1
kCffr[c] = row+1
kCffc[c] = col+1
kCffv[c] += 0.5*a*kt*rAv*rBv*sAv*sBv
c += 1
kCffr[c] = row+2
kCffc[c] = col+2
kCffv[c] += 0.5*a*kt*(rAw*rBw*sAw*sBw + 4*kr*rAw*rBw*sAweta*sBweta/((bf*bf)*kt))