二、轴心受拉构件的受力分析 5.混凝土开裂荷载 E=8 to A Ot or E No=E4(1+-8)E0 E E Et ECA(1+aep)Ero二、轴心受拉构件的受力分析 5. 混凝土开裂荷载 Nt t=ft As s 0 0 (1 ) (1 ) c E t t s c s t cr c E A A A E E N E A     = + = + t t o t0 f t t=Ect t0  = 