以往工程设计中均没有考虑拱管在水平荷载作用下产生水平位移后在半跨垂直荷载作用下对支座产生的附加弯矩及附加扭矩。这个附加弯矩和附加扭矩到底有多大,工程设计中能否忽略不计?本文从理论上加以推导并给出工程中三种常用矢跨比的实用计算公式。 In the past engineering design, the additional bending moment and additional torque generated by the arch under the action of half-span vertical load after horizontal displacement under horizontal load were not taken into account. How large is this additional bending moment and additional torque in the end, and whether it can be neglected in engineering design? This paper deduces theoretically and gives a practical calculation formula for three common span-to-span ratios in engineering.