学习资料36500 2011090118 01 123245why6 731 10276032 cadcadcadcad2121a36122121a33 34 35 10mfcufcu,k 0.7o fcu,minfcu,k-0.7oc20fcu,min0.85fcu,k>c20fcu,min0.90fcu,kmfcun/mm2fcukn/mm2ofcumino0.59/mfcu,ifcu,iimmfcu-1 ,fcu0.9fcu,kfcu?min2fcu,kfcun/mm2sfcu<0.06fcu,ksfcu=0.06fcu,k12 1014 1524 251 1.70 1.65 1.602 0.9 0.85 0.85sfcu=( fcu?i2-n?mfcu2)/(n-1)1/2 10mfcu1.15fcu?kfcu?min0.95fcu?kmfm.kfm.k()fm.kmin() 0.75fm.k36 8i 37 () 38 39 310 311 312 , 100mm1m24mm12mm313