*4.3. Experimental Error Analysis*

The experimental errors mainly come from the following aspects:


#### **5. Conclusions and Prospects**

In this study, a spatial box bridge was taken as the research object. Based on the macrostatic and dynamic strain data, and the wavelet transform de-noising and reconstruction technology, a damage identification method for medium- and small-span bridges under the action of vehicle–bridge coupling was studied. The following conclusions can be drawn from the results:


**Author Contributions:** Conceptualization, H.Z. and Z.Z. (Zhixin Zhong); methodology, H.Z. and Z.Z. (Zhixin Zhong); formal analysis, Z.Z. (Zhixin Zhong); software, Z.Z. (Zhixin Zhong) and Z.Z. (Zhichao Zheng); validation, Z.Z. (Zhixin Zhong) and H.Z.; data curation, Z.Z. (Zhichao Zheng) and G.L.; Writing and original draft preparation, Z.Z. (Zhixin Zhong); Visualization; H.Z. and J.D.; Investigation, H.Z. and J.D.; language polishing, Z.Z. (Zhixin Zhong) and J.Y.; writing and reviewing, H.Z. and J.D.; writing and translating, J.Y.; editing, Z.Z. (Zhixin Zhong) and J.Y.; drawing, Z.Z. (Zhixin Zhong) and J.Y.; reviewing, Z.Z. (Zhichao Zheng) and G.L. All authors have read and agreed to the published version of the manuscript.

**Funding:** This study is supported by the following four projects: 1. The Natural Science Foundation of Hebei Province (E2020210022); 2. Hebei Province key research and development plan project under grant no.19210804D; 3. Natural Science Foundation of Hebei Province (E2021210099); 4. Natural Science Foundation for Youths of Hebei Province of China (E2021210055).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.

**Acknowledgments:** This study was supported by the State Key Laboratory of Structural Mechanics Behavior and System Safety in Traffic Engineering and Structural Health Monitor and Control Institute.

**Conflicts of Interest:** The authors declare no conflict of interest.
