变点分析理论旨在用统计学的方法解决非线性数据处理的有关问题。将模型变点理论用于桥塔变形分析 ,论述了理论原理、分析方法。对观测序列作滑动检验 ,以最优分割点为阀分段建模 ,用 F检验法推断模型变点的存在。结果表明 ,该方法能准确地定位一维或多维模型变点的存在、位置和跃度 ,从而提高变形数据分析的准确度 ,为桥梁工程质量评价及建筑安全性态评估提供可靠决策信息 The theory of variable point analysis aims to solve the problems related to nonlinear data processing in a statistical way. The theory of changing point of the model is applied to the deformation analysis of the bridge tower, and the theoretical principle and analysis method are discussed. The sliding test was made on the observed sequence, the optimal segmentation point was used to model the valve segment, and the existence of the change point of the model was inferred by the F test. The results show that this method can accurately locate the existence, position and jerk of the change point in one or more models so as to improve the accuracy of the deformation data analysis and provide reliable decision information for the evaluation of bridge engineering quality and the assessment of building safety