Structural Performance of Bolted Connectors in Retrofitted Transmission Tower Leg Members

Lu, Chenghao; Ma, Xiaoxuan; Mills, Julie E.

doi:10.1061/9780784479414.039

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Therefore, the authors have investigated the load transfer behavior of cross-connections and joints using experimental tests and compared the results with models that were developed in software called ABAQUS. They then carried out a parametric study, taking into account friction coefficients, screw numbers, and torque values using the confirmed numerical models [23]. Lu et al (2014) presented in their study the load shifting behavior of the cross and joint connections to the legs of retrofitted gear towers.…”

Section: Figure 18 Methods Of Retrofittingmentioning

confidence: 99%

Evaluation of Seismic Performance of Steel Lattice Transmission Towers

Albayrak

Morshid

2020

Civ Eng J

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The electricity transmission systems are an important lifeline for modern societies. They are used for overhead power lines as supporting structures. Transmission towers are designed to meet electrical and structural requirements. They are designed according to the weight of conductors and environmental effects such as wind and ice loads. They also considered other extraordinary stresses such as cable breakage and ice-breaking effects. Because of a common perception that transmission line (TL) towers show low sensitivity to earthquakes, the effects of the earthquake in TL tower construction are not considered. For this reason, TL towers are investigated with regard to the seismic performance in this study. The principal objectives of this research are: i) to assess the sensitivity of typical TL towers to earthquake loads, ii) to retrofit an existing steel lattice tower using a new section Centre To Center (CTC). In this study, a finite element model of a representative 154 KV transmission tower in Turkey was performed using a set of 10 recorded earthquake ground movements. The four-legged square TL tower has been analyzed and designed for Turkey, Eskisehir seismic zone considering 42.95 m height using finite element (FE) software. Therefore, a new section Centre To Center (CTC) type has been designed and the failed sections have been replaced with a designed section using the SAP2000 section designer. The results show that the load of failure increased after retrofitting. The retrofitting method was effective and easily conducted in fields. Doi: 10.28991/cej-2020-03091600 Full Text: PDF

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Section: Figure 18 Methods Of Retrofittingmentioning

confidence: 99%

Evaluation of Seismic Performance of Steel Lattice Transmission Towers

Albayrak

Morshid

2020

Civ Eng J

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“…In practice, it is expected that varying bolt numbers, bolt pretension value and frictional situations between original and reinforcing members change the stiffness and slip-resistance of connectors [18], thus modify the load transfer path. To study the structural effect of connector properties, an assumed range from −75% to +75% of the original spring stiffness and spring slip-load was adopted ( Table 8).…”

Section: Parametric Studymentioning

confidence: 99%