对历史悠久的文物桥或“超期服役”的老旧桥进行安全、健康诊断,是一项严谨和必需的工作,但由于它们的设计、施工资料往往遗失无考,使得必须依靠这些资料才能进行的常规变形分析方法无法实施。本文采用分期回归理论,通过拱桥变形测量分析的实践,证明该方法能够有效地解决上述难题。 The safety and health diagnosis of historic heritage bridges or old bridges of “extended service” is a rigorous and necessary task, but because of their design, construction materials are often missing and have to be relied upon, so that they must be relied on Conventional deformation analysis methods that can be carried out can not be implemented. In this paper, the theory of staged regression is used to prove that this method can effectively solve the above problems through the practice of arch bridge deformation measurement and analysis.