However for some reason, a lot of double-cruved arch bridges appeared the damage of the different degree after being used some period of time and need as to be assess, maintain or reinforce.

• 但是，由于各种原因，一部分双曲拱桥在使用一段时期后，出现了不同程度的损坏，急需对其承载力进行评定，从而进行养护维修和加固改造。