Seismic analysis of transmission tower under low to moderate earthquake loading

In Malaysia, even though the country can be considered as a low seismic area, the structural safety under seismic load has not been studied. Therefore, seismic vulnerability assessment is needed to be performed, especially for the towers. The objectives of this study are to investigate the capacity...

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Main Author:	Ullah, Rafiq
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/81439/1/RafiqUllahMSKA2018.pdf
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id	my-utm-ep.81439
record_format	uketd_dc
spelling	my-utm-ep.814392019-08-23T05:18:40Z Seismic analysis of transmission tower under low to moderate earthquake loading 2018 Ullah, Rafiq TA Engineering (General). Civil engineering (General) In Malaysia, even though the country can be considered as a low seismic area, the structural safety under seismic load has not been studied. Therefore, seismic vulnerability assessment is needed to be performed, especially for the towers. The objectives of this study are to investigate the capacity of tower members, failure mode, determine seismic capacity, and to derive seismic fragility curve for towers in Malaysia when subjected to far-field earthquake. The numerical models of three different heights towers were established in non-linear FE software, namely SAP2000. Equivalent static and response spectrum analysis, Pushover analysis and time history analysis were performed to determine the capacity of the towers members, capacity and fragility of towers, respectively. Totally, 6 far-field earthquake records, which were scaled from 0.05g up to 0.6g, were used in an incremental dynamic analysis in order to obtain fragility curves. Result from this study revealed that plastic hinge formation occurred near the tower base. Capacity curve was proved that the capacity of the studied tower decreases when the height of tower increases, as the length of tower member increases. The result of fragility curves showed that the most vulnerable tower due to far-field earthquake was tower with tallest (63.33m) height, and the probability of damage has significantly increased for the peak ground acceleration (PGA) larger than 0.2g. 2018 Thesis http://eprints.utm.my/id/eprint/81439/ http://eprints.utm.my/id/eprint/81439/1/RafiqUllahMSKA2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:125054 masters Universiti Teknologi Malaysia Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ullah, Rafiq Seismic analysis of transmission tower under low to moderate earthquake loading
description	In Malaysia, even though the country can be considered as a low seismic area, the structural safety under seismic load has not been studied. Therefore, seismic vulnerability assessment is needed to be performed, especially for the towers. The objectives of this study are to investigate the capacity of tower members, failure mode, determine seismic capacity, and to derive seismic fragility curve for towers in Malaysia when subjected to far-field earthquake. The numerical models of three different heights towers were established in non-linear FE software, namely SAP2000. Equivalent static and response spectrum analysis, Pushover analysis and time history analysis were performed to determine the capacity of the towers members, capacity and fragility of towers, respectively. Totally, 6 far-field earthquake records, which were scaled from 0.05g up to 0.6g, were used in an incremental dynamic analysis in order to obtain fragility curves. Result from this study revealed that plastic hinge formation occurred near the tower base. Capacity curve was proved that the capacity of the studied tower decreases when the height of tower increases, as the length of tower member increases. The result of fragility curves showed that the most vulnerable tower due to far-field earthquake was tower with tallest (63.33m) height, and the probability of damage has significantly increased for the peak ground acceleration (PGA) larger than 0.2g.
format	Thesis
qualification_level	Master's degree
author	Ullah, Rafiq
author_facet	Ullah, Rafiq
author_sort	Ullah, Rafiq
title	Seismic analysis of transmission tower under low to moderate earthquake loading
title_short	Seismic analysis of transmission tower under low to moderate earthquake loading
title_full	Seismic analysis of transmission tower under low to moderate earthquake loading
title_fullStr	Seismic analysis of transmission tower under low to moderate earthquake loading
title_full_unstemmed	Seismic analysis of transmission tower under low to moderate earthquake loading
title_sort	seismic analysis of transmission tower under low to moderate earthquake loading
granting_institution	Universiti Teknologi Malaysia
granting_department	Civil Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/81439/1/RafiqUllahMSKA2018.pdf
_version_	1747818332061433856

Seismic analysis of transmission tower under low to moderate earthquake loading

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