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Failures of roof structures caused by wind uplift forces

The weakness of the tying down systems between the structural elements has been identified as the main cause of the failure of light roof structures due to uplifting pressure from the wind. These weaknesses have caused part of the roof structure being blown off during thunderstorms. This project rep...

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Main Author: Zainul Amri, Haidar Akma
Format: Thesis
Language:English
Published: 2010
Subjects:
TA Engineering (General). Civil engineering (General)
TH Building construction
Online Access:http://eprints.utm.my/id/eprint/16417/5/HaidarAkmaZainulAmriMFKA2010.pdf
http://eprints.utm.my/id/eprint/16417/
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spelling my.utm.164172017-09-20T03:28:49Z http://eprints.utm.my/id/eprint/16417/ Failures of roof structures caused by wind uplift forces Zainul Amri, Haidar Akma TA Engineering (General). Civil engineering (General) TH Building construction The weakness of the tying down systems between the structural elements has been identified as the main cause of the failure of light roof structures due to uplifting pressure from the wind. These weaknesses have caused part of the roof structure being blown off during thunderstorms. This project report presents the results of a study carried out to evaluate the load carrying capacities of joints for zinc/asbestos sheeting to purlin, purlin to rafter and rafter to roof beam in the frame structure for light roof construction. The capacities of these joints were determined from laboratory tests on respective samples and also from previous related tests. Comparisons were made with the calculated pressures from the wind and hence the pulling out forces exerted on each type of joint on modeled buildings representing the low and high rise houses located areas similar to those which experienced failure. Details of the structural configuration and types of joints adopted were within the range found in actual construction. The result show that the number of tying down points between members within a specified area of roof and the depth of penetration of the nails at three points currently adopted are inadequate. They are only sufficient to sustain forces exerted by the wind speeds of up to wind speeds of up to 10m/s and 50m/s in low and high rises building respectively. It was also proposed that the pitches between purlin and also between rafters in the present construction be reduced in order to achieve more connection points. 2010-12 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/16417/5/HaidarAkmaZainulAmriMFKA2010.pdf Zainul Amri, Haidar Akma (2010) Failures of roof structures caused by wind uplift forces. Masters thesis, Universiti Teknologi Malaysia, Faculty of Civil Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TA Engineering (General). Civil engineering (General)
TH Building construction
spellingShingle TA Engineering (General). Civil engineering (General)
TH Building construction
Zainul Amri, Haidar Akma
Failures of roof structures caused by wind uplift forces
description The weakness of the tying down systems between the structural elements has been identified as the main cause of the failure of light roof structures due to uplifting pressure from the wind. These weaknesses have caused part of the roof structure being blown off during thunderstorms. This project report presents the results of a study carried out to evaluate the load carrying capacities of joints for zinc/asbestos sheeting to purlin, purlin to rafter and rafter to roof beam in the frame structure for light roof construction. The capacities of these joints were determined from laboratory tests on respective samples and also from previous related tests. Comparisons were made with the calculated pressures from the wind and hence the pulling out forces exerted on each type of joint on modeled buildings representing the low and high rise houses located areas similar to those which experienced failure. Details of the structural configuration and types of joints adopted were within the range found in actual construction. The result show that the number of tying down points between members within a specified area of roof and the depth of penetration of the nails at three points currently adopted are inadequate. They are only sufficient to sustain forces exerted by the wind speeds of up to wind speeds of up to 10m/s and 50m/s in low and high rises building respectively. It was also proposed that the pitches between purlin and also between rafters in the present construction be reduced in order to achieve more connection points.
format Thesis
author Zainul Amri, Haidar Akma
author_facet Zainul Amri, Haidar Akma
author_sort Zainul Amri, Haidar Akma
title Failures of roof structures caused by wind uplift forces
title_short Failures of roof structures caused by wind uplift forces
title_full Failures of roof structures caused by wind uplift forces
title_fullStr Failures of roof structures caused by wind uplift forces
title_full_unstemmed Failures of roof structures caused by wind uplift forces
title_sort failures of roof structures caused by wind uplift forces
publishDate 2010
url http://eprints.utm.my/id/eprint/16417/5/HaidarAkmaZainulAmriMFKA2010.pdf
http://eprints.utm.my/id/eprint/16417/
_version_ 1643646555123613696
score 13.211869

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