Evaluation of Seismic Performance of Steel Lattice Transmission Towers

سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 20

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شناسه ملی سند علمی:

JR_CEJ-6-10_014

تاریخ نمایه سازی: 28 تیر 1404

چکیده مقاله:

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 ۱۵۴ KV transmission tower in Turkey was performed using a set of ۱۰ recorded earthquake ground movements. The four-legged square TL tower has been analyzed and designed for Turkey, Eskisehir seismic zone considering ۴۲.۹۵ 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 SAP۲۰۰۰ section designer. The results show that the load of failure increased after retrofitting. The retrofitting method was effective and easily conducted in fields. Doi: ۱۰.۲۸۹۹۱/cej-۲۰۲۰-۰۳۰۹۱۶۰۰ Full Text: PDFThe 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 ۱۵۴ KV transmission tower in Turkey was performed using a set of ۱۰ recorded earthquake ground movements. The four-legged square TL tower has been analyzed and designed for Turkey, Eskisehir seismic zone considering ۴۲.۹۵ 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 SAP۲۰۰۰ section designer. The results show that the load of failure increased after retrofitting. The retrofitting method was effective and easily conducted in fields. Doi: ۱۰.۲۸۹۹۱/cej-۲۰۲۰-۰۳۰۹۱۶۰۰ Full Text: PDF

کلیدواژه ها:

Earthquake Damage Non-linear Dynamic Analysis Retrofitting Seismic Evaluation Transmission Tower.

نویسندگان

Uğur Albayrak

Assistant Professor, Department of Civil Engineering, Eskisehir Osmangazi University, Eskisehir, Turkey

Loai A. M. Morshid

Department of Civil Engineering, Eskisehir Osmangazi University, Eskisehir,, Turkey