# Research on the Safety Assessment of Corbel Beams of Reservoir Radial Gates Based on Real States
## 4 Conclusions  
Concrete corbel beams are extensively employed as support structures for radial gates in large and medium-sized reservoirs. However, it has been observed that the current design code in China lacks an appropriate safety assessment method for corbel beams of radial gates. Utilizing the corbel assessment method in this context may lead to misjudgments regarding the working condition of corbel beams, consequently impacting subsequent safety assessments and danger removal and reinforcement.  
Therefore, in order to make an accurate safety assessment of the corbel beam, this paper takes the corbel beam reinforcement project of a medium-sized reservoir radial gate in Beijing as an example. Through on-site inspection and a core drilling test, the results show that the concrete strength is good, and it has been improved compared with the design value. Then, combined with _the Code for Design of Hydraulic Concrete Structures_ (SL191-2008), the theoretical mechanical safety assessment method applied to small-scale projects and the finite element simulation safety assessment method applied to large and medium-scale projects were proposed, and three calculation models were established with the safety inspection test data. Through the calculation results of the three models, the stress distribution of the corbel and the joint stress structure of the corbel beam and gate pier were compared and analyzed, and finally, combined with the field inspection test data, stress distribution analysis, and safety review results, it was judged that the working state of the corbel beam structure of this project is normal and the operation meets the design requirements. The current safety assessment method and the calculation results of the two methods proposed in this paper were then compared and analyzed, thereby proving the rationality of the corbel beam safety assessment method proposed in this paper. These methods can be used to replace the current calculation method for safety assessment and provide a theoretical basis for the removal of dangers and reinforcement of similar projects.  
Since the corbel safety assessment method proposed in this paper is based on the inadequacies of existing codes, it is used to make up for the lack of a theoretical basis for corbel beam safety review in actual engineering. Therefore, as relevant research progresses and relevant specifications improve, further analysis and research can be conducted on the stress distribution of corbel beams, taking into account water level changes and concrete aging damage models. This will enable the formulation of more comprehensive safety assessment specifications for widespread adoption and application.  
Conceptualization, R.W.; methodology, J.L., Y.Z. and Y.S.; validation, R.W., J.L., Y.Z. and Y.S.; data curation, R.W.; writing--original draft preparation, J.L.; writing--review and editing, R.W., Y.Z. and Y.S.; visualization, J.L., Y.Z. and Y.S.; supervision, R.W. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research was funded by National Key R&D Program of China (No. 2022 YFC3005503), the IWHR Basic Research Fund (No. SM0145B022021), Scientific research project of Yangtze River and Huai River (No. HNYJH/JS/FWKY-2021005).  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** Not applicable.  
**Acknowledgments:** The authors would like to thank [PERSON] and [PERSON] for providing experimental equipment and experimental data support.  
**Conflicts of Interest:** The authors declare no conflict of interest.