Fig.11-5 Line of pressure and arch moment V 4Hx(L-x) H- L x (a)竖向均布荷载 (b)垂直于拱轴的均布荷载 (a)中心集中荷载 (b)竖向偏心分布荷载Fig.11-5 Line of pressure and arch moment H H q 4 H L x y y L2 x ( L x) L y x 2 L y x F x y (a)竖向均布荷载 (b)垂直于拱轴的均布荷载 (a)中心集中荷载 (b)竖向偏心分布荷载 q