本计算方法的适用范围:1.刚性拉杆或刚拱;2.拱轴线:为左右对称的二次抛物线形;3.节间间隔相等。这个适用范围与阿斯特瓦差洛夫所著的“桥拱的计算”一书中所列者相同。旧的计算方法的简略介绍该式桥梁的超静定次数为悬杆数加3,其中3次一般均假定为弹性中心的推力,弯短及剪力的三个内力。但此三个内力是假定,在无悬杆而只有拱肋及拉杆的情 The calculation method of the scope of application: 1. Rigid tie rod or just arch; 2. Arch axis: for the symmetrical secondary parabolic shape; 3. Internodal interval equal. The same applies to those listed in Astevalov’s book “Calculating Arch Arches”. The old calculation method of a brief introduction of the type of bridge statically indeterminate number of suspended poles plus 3, of which 3 are generally assumed to be the elastic center of the thrust, bending and shear of the three internal forces. However, these three internal forces are assumed that there is no hanging bar and only the arch ribs and tie bar