考虑初始几何缺陷对拱桥变形分布识别的影响

为了更精准地识别拱桥的变形分布，本文提出了考虑初始几何缺陷的拱桥变形分布识别方法。基于应变与拱肋曲率变化间的推导关系，本文利用采集的应变响应去有效识别拱肋的变形分布。进而，确定不同类型的初始几何缺陷的呈现形式，并将它们分别融入到公式中去分析变形曲线间的不同。为了验证本文提出方法的可行性和有效性，对一座系杆拱桥的变形分布进行估计，结果表明初始几何缺陷对拱桥变形分布具有较大的影响，本文所提出的方法能够有效识别含有初始缺陷结构的变形分布。

The effects on the identification of deformation distribution of Arch Bridges considering initial geometric defects

In order to identify the deformation distribution of the arch bridge more accurately, this paper presents an identification method of the arch bridge considering the initial geometric defects. Based on the mathematical correlations between strain and curvature of the arch rib, this paper uses the strain response to effectively identify the deformation distribution of the arch rib. Furthermore, the presentation forms of different types of initial geometric defects are determined, and they are incorporated into the formulas to analyze the differences between deformation curves. For the proposed of verifying the feasibility and effectiveness of the method proposed in this paper, the deformation distribution of a tied-arch bridge is estimated. The results show that the initial geometric defects have a great impact on the deformation distribution of structural. And the method proposed can effectively identify the deformation distribution of the structure with initial defects.