# Study on Wind Resistance Performance of Transmission Tower Using Fixture-Type Reinforcement Device
###### Abstract  
Transmission towers are an important component of the electric system, and their tall structural characteristics make them susceptible to failure under strong winds. Therefore, it is crucial to enhance the wind resistance of the transmission tower structures. This paper uses the finite element method to investigate the influence of a fixture-type reinforcement device (FRD) on the load-bearing performance of the transmission tower structure and explores the effects of different numbers of fixture pairs on the reinforcement. Based on this, the paper further analyzes the stress characteristics and failure modes of a typical tower structure under wind loads in two directions and investigates the influence of different reinforcement lengths on the wind resistance performance of the tower structure. The research results indicate that the FRD can effectively improve the deformation mode and failure characteristics of steel components under axial load. At the same time, using the FRD can effectively reduce the deformation of tower structures under strong wind, and only reinforcing three angled steel components can reduce the tower top displacement by about 55% and more. transmission tower; wind resistance performance; fixture-type reinforcement device; failure mode 20252025202520252025202520252025202520252025202025202520202520252025202025202520202520202520202520202520202520202520252020252025202025202520202520202520202520202520202520202520202520202520252020252025202025202025 wind response analysis was performed on a transmission tower. [PERSON] et al. conducted the wind tunnel test on a 1/80-scale model of a lattice tower and found that the conductors play a significant role in the wind-induced responses of the tower [5]. [PERSON] et al. also conducted the wind tunnel test on an angled steel triangular transmission tower so as to derive its drag coefficients [6]. Additionally, the experimental results are verified by the computational fluid dynamic analysis. Apart from the field tests and the wind tunnel experiments, many researchers have also conducted numerical analyses on the wind-induced responses of transmission towers. [PERSON] et al. used the finite element model to analyze the structural behavior of the transmission line towers under the action of winds and proposed an analytical framework to assess their stability in the design stage [7]. Based on the results, a simplified model with two degrees of freedom was proposed to derive the dynamic properties of the tower. [PERSON] and [PERSON] proposed to utilize the incremental dynamic analysis method to assess the collapse fragility curve of transmission towers when attacked by hurricanes, and the results can be used to quantify the uncertainty and evaluate the economic loss of the power system [8]. [PERSON] et al. proposed a modelling framework to evaluate the fragility of the transmission towers under strong winds, in which the wind loads exerted on the structure can be represented by the combination of two orthogonal loads on the tower and a load on the transmission wires [9]. Additionally, the effects of wind directionality [10], fatigue damage [11], the component-system level of fragility [12] were also considered. Furthermore, downburst wind, as a typical local highly intensive wind type, has attracted the attention of researchers, and the fragility of the transmission tower under such winds has been studied [13; 14]. [PERSON] et al. also investigated the fragility problems of similar steel structures, in which the different failure modes are considered [15]. To enhance the wind resistance performance of transmission towers, some reinforcing schemes have been proposed and validated by researchers. These reinforcing schemes include the bolted splices [16; 17], steel casings [18], and clamps [19; 20]. [PERSON] et al.