# Study on Wind Resistance Performance of Transmission Tower Using Fixture-Type Reinforcement Device
## 5 Conclusions  
To investigate the wind resistance performance of a transmission tower, the fixture-type reinforcement device was used. The configuration of the device was first introduced, and then the finite element analysis of the main angled steel component was conducted. Then, the complete model of the transmission tower was established, and a wind load was applied in two directions. Lastly, the reinforcing effect of the FRD was verified through the simulation of the tower model under different cases. The main conclusions can be drawn as follows:  
1. The FRD can effectively improve the deformation characteristics and failure modes of angled steel components under axial loads. The FRD with three fixture pairs shows great influence since it can increase the peak load of the angled steel component by 37%.
2. The tower structure is prone to integral structural collapse due to local component failure under wind loads and the failure occurring at the connection between two different steel materials. The ultimate state of the tower is derived when the wind  
Figure 12: The top displacement of the tower under the same wind speed: (**a**) Along the cable direction; (**b**) Perpendicular to the cable direction.  
speeds are, respectively, 44.7 m/s in the direction of the cable and 38.1 m/s in the direction perpendicular to the cable.
3. The use of the FRD can effectively reduce the deformation of the tower structure under strong winds. Only reinforcing three angled steel components (4.5 m) above the vulnerable component can achieve good results. The top displacements of the tower can be reduced by 55% and 67% in, and perpendicular to, the direction of the cable, respectively.
4. FRD is easy to install in an existing transmission tower; therefore, it is a low-cost option to improve its wind resistance performance and keep its deformation within a safe operational zone under strong wind conditions.  
The FRD is utilized in this study to enhance the wind resistance performance of the transmission tower when subjected to wind load. However, the selection of the strengthening zones is another important factor that could influence the effectiveness of the strengthening scheme, which will be investigated in the next step. Additionally, the authors will conduct an optimization study of different strengthening devices to find optimal strengthening schemes for various types of transmission towers.  
Conceptualization, X.T. and Y.L.; methodology, X.T.; software, Y.L. and B.S.; validation, X.T., Y.L. and B.S.; formal analysis, X.T.; investigation, J.C.; resources, X.T. and H.W.; data curation, X.T.; writing--original draft preparation, X.T.; writing--review and editing, Y.L., B.S. and J.M.; visualization, N.Z.; supervision, J.M. and H.W.; project administration, X.T. and Y.L.; funding acquisition, X.T. and Y.L. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the Science and Technology Program of State Grid Jiangsu Electric Power Co., Ltd., under Grant J2023056.  
Not applicable.  
Data Availability Statement: Data will be made available on request.  
Authors [PERSON], [PERSON], [PERSON] were employed by the company State Grid Jiangsu Electric Power Co., Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.