二、骨架曲线的弯矩-曲率关系 2.短期荷载下的弯矩-曲率关糸 截面的相容关系 z 截面中心线 SA En=。/h 8-Zo E=E+(-a、)二、骨架曲线的弯矩-曲率关系 2. 短期荷载下的弯矩-曲率关系 截面的相容关系 as h/2- as h h/2- as Zi as As sAs s As 1 i n c1 s ci M s As ci 截面中心线 b N ci = − Zi = + − = − − ) 2 ( ') 2 ' ( s s s s a h a h