(一)实腹拱桥[图1(a)]承受拱上建筑及拱圈重量的分布恒载,空腹拱桥[图1(b)]既承受分布的恒载(实腹部分及拱圈自重),又承受集中的恒载(从立柱或立墙传到拱圈上来的荷载)。在恒裁作用下,实腹或空腹无铰拱桥按实际恒载形式来推导合理拱轴线是较复杂的,以下就来讨论这个问题。 (A) Solid abdominal arch bridge [Figure 1 (a)] bear the weight distribution of arches and arches Constant load, fasting arch [Figure 1 (b)] both bear the distribution of constant load , But also to withstand the concentration of dead load (from the column or vertical wall reached the arch ring load). Under the action of constant cutting, it is more complicated to deduce the rational arch axis according to the actual dead load under real abdominal or fasting hingeless arch bridge. The following discussion will discuss this problem.