Analiza daljnovodnih stebrov po EN 50341-1:2012 : magistrsko delo

Mugerli, Matija (author), Može, Primož (mentor), Grad, Laura (co-mentor)

SIST EN 50341-1:2002 je slovenski prevod EN 50341-1:2001 in se je uporabljal za nadzemne vode z nazivno napetostjo nad 45 kV in nazivno frekvenco pod 100 Hz. Je prvi od treh delov EN 50341 in je skupen vsem državam. Uvaja dva pristopa za določitev vplivov na daljnovodni steber, splošnega in empiričnega. Uporabo prvega dela vsaka država razširi z zahtevami, vključenimi v nacionalnem normativnem dokumentu, ki predstavlja 3. del standarda. Drugi in tretji del sta seznam nacionalnih normativnih dokumentov vseh držav. Država v nacionalnih normativnih dokumentih poda podnebne pogoje, ki omogočajo uporabo splošnega ali empiričnega pristopa. Za Slovenijo je to SIST EN 50341-3-21:2009, ki pri določanju vplivov na nadzemni vod uporablja empirični pristop. EN 50341-1:2012 je naslednik EN 50341-1:2002. Uporablja se za nadzemne vode z nazivno napetostjo nad 1 kV in nazivno frekvenco pod 100 Hz. Nacionalni normativni dokument za Slovenijo še ni izdan. Za razliko od predhodnika, EN 50341-1:2012 ne podaja navodil za določitev vplivov preko empiričnega pristopa, ampak uporablja samo splošni pristop. SIST EN 50341-3-21:2009 zaradi uporabe empiričnega pristopa tako ni kompatibilen z EN 50341-1:2012. V magistrski nalogi so zato analizirani in dimenzionirani karakteristični elementi nosilne konstrukcije 400 kV daljnovodnega stebra na dva načina. V prvem delu so vplivi na DV steber določeni z uporabo empiričnega pristopa (SIST EN 50341-1:2002 skupaj s SIST EN 50341-3-21:2009), v drugem delu pa še z uporabo splošnega pristopa (EN 50341-1:2012). Primerjane so razlike med obtežbami in obtežnimi kombinacijami ter kako se to odraža pri velikosti osnih sil, pomikih in reakcijah. Analiza daljnovodnega stebra je izvedena s pomočjo idealiziranega računskega modela v programu za račun po metodi končnih elementov RFEM. Skladno z daljnovodno prakso je na trasah daljnovodov število nosilnih stebrov veliko večje od števila napenjalnih stebrov, zato v delu obravnavamo primer nosilnega stebra.

• Language: Slovenian
• Keywords: daljnovodni steber, vodniki, RFEM, kotniki, žled
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: [M. Mugerli]
• Year: 2020
• PID: 20.500.12556/RUL-124034
• UDC: 006.35:621.315.17(497.4)(043.3)
• COBISS.SI-ID: 46962947
• Publication date in RUL: 21.12.2020

Secondary language

• Language: English
• Title: Analysis of transmission towers according to EN 50341-1:2012 : master thesis

Abstract

SIST EN 50341-1:2002 is the Slovenian version of EN 50341-1:2001 that covered overhead electric lines with nominal system voltages exceeding AC 45 kV and with rated frequencies below 100 Hz. It is the first of three parts of EN 50341 and it is common to all countries. Two approaches are used for determination of actions on lines, general and empirical approach. Each country extends the application of first part with the requirements included in the national normative aspect that constitute parts 2 and 3 of the standard. In national normative aspect, country specifies the climatic conditions that allow the application of a general or empirical approach. For Slovenia, this is SIST EN 50341-3-21:2009, which uses an empirical approach for determining actions on transmission tower. EN 50341-1:2012 supersedes EN 50341-1:2002. It is used for overhead electric lines with nominal system voltages exceeding 1 kV and with rated frequencies below 100 Hz. It consists of two parts. The second part (national normative aspect) was not released yet for Slovenia. Unlike its predecessor, EN 50341-1:2012 does not provide guidance for determining actions using empirical approach, but only uses general approach. Therefore, SIST EN 50341-3-21:2009 is not compatible with EN 50341-1:2012. In the master˝s thesis, therefore, characteristic elements of 400 kV transmission tower are analyzed and designed in two ways. In the first part, actions on transmission tower are determined using an empirical approach (SIST EN 50341-1:2002 together with SIST EN 50341-3-21:2009), and in the second part using a general approach (EN 50341-1:2012). The differences between actions and load cases are compared and how this reflects in the axial forces, displacements and reactions. The analysis of the transmission tower is carried out with idealised computing model made in RFEM programme, which uses finite element method for calculation. Since the load - bearing transmission towers are more commonly used in a line than section towers , we consider the case of load – bearing transmission tower.

• Keywords: transmission tower, conductors, RFEM, angles, glaze ice