Abstract
The vital components of the transmission line are the electrical transmission towers. They are commonly used to support the phase conductors and shield wires of a transmission line. Also the accurate prediction of tower failure is very important for the reliability and safety of the transmission system. The current research describes nonlinear FE models of predicting the transmission tower failure. In the current FE simulations, the eccentricity and the joint effect of the tower were considered. The current models have been calibrated with results from previous full-scale tower tests and numerical models with good accuracy in terms of both the failure load and the failure mode.
Highlights
The common transmission towers systems are the pole system and the lattice system
Comparing the results of their new technique and the results of their experimental model showed that the technique has been shown to predict accurately both the failure load and the failure mode. More studies such as Kitipornchai et al [13], Knight and Santhakumar [14], Ahmed et al [15], and Albermani et al [16] indicated that the bolted joint effects has a significant influence on tower behavior by either reducing its load-carrying capacity or increasing deflections under working loads and this effect is not considered in the linear ideal truss analysis
The current paper presented theoretical study depending on the finite element method (FEM) using ANSYS software package [17] to predict the actual strength and failure mechanism of the transmission tower
Summary
The common transmission towers systems are the pole system and the lattice system. The pole system can be economically used for relatively shorter span and lower voltage (345-kV or less). Albermani and Kitipornchai [12] developed a new analytical technique This model represents geometric and material nonlinearities for simulating ultimate structure of the lattice transmission tower. Comparing the results of their new technique and the results of their experimental model showed that the technique has been shown to predict accurately both the failure load and the failure mode More studies such as Kitipornchai et al [13], Knight and Santhakumar [14], Ahmed et al [15], and Albermani et al [16] indicated that the bolted joint effects (joint slippage) has a significant influence on tower behavior by either reducing its load-carrying capacity or increasing deflections under working loads and this effect is not considered in the linear ideal truss analysis. Eccentricities of connections for the tower members that they connected only on one leg and joint slippage were modeled
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