Structural Strength and Behaviour of Cylindrical Steel Sheet Roofing

Islam, S. M. Zahurul (2005) Structural Strength and Behaviour of Cylindrical Steel Sheet Roofing. Masters thesis, Universiti Putra Malaysia.

[img] PDF
1326Kb

Abstract

The roof does not only protect the building and its occupants from the effects of weather, but it is also an architectural feature that gives the building a desired appearance. Profiled steel sheet zincalume is normally used in roof as covering materials, without any attention paid to its struchiral capability as a self-supporting medium. A self-supporting roofing element is a new; where profiled sheeting roof could run continuous lengths of roof spans without internal support. This roofing system saves material and construction cost by avoiding internal support. The aim of this research work is to study the possibility of using profiled steel sheet as self-supporting roofing elements for affordable housing. An analytical investigation using the finite element method was carried out on the structural strength and behavior of different types of self-supporting roofing elements. Five laboratory tests using 3 m spans, 0.42 mm thickness and different crown heights of 1.5, 1.0, 0.50, 0.25 and 0.125 m specimens were conducted for assessing the structural strength and behavior of roofing elements. Analytical study was camed out on the effect of shape, size, materials and support condition on the structural behaviour of the selected roofing element. The analytical investigation was extended for longer spans to explore the feasibility of using of profiled steel sheet as a self supporting roofing system in housing construction. In the analytical work, finite element models were generated and analyzed by using LUSAS software. The analytical study for the roofing elements showed that parabolic profiled roofing element with crown height 116 of span length was more efficient than others as a self-supporting element. The proposed self-supporting roofing element satisfied geometrical, buckling and material stability. Deflection was found to be the limiting criteria in design for self-supporting roofing element using profiled steel sheet. The presence of corrugation in the steel roofing element resulted in a significant improvement on the roofs structural performance compared to flat sheet element. Good agreement was found between the results from finite element analysis and those obtained experimentally. The FEM models predicted with a reasonable degree of accuracy the structural behavior of different types of roofing elements. It was observed that a parabolic shape roofing element with an optimum crown height could be used as a self- supporting roofing element for about 4 m and 8 m span lengths using 0.42 mm and 1.25 mm thick profiled steel sheet. On the basis of this investigation, parabolic self-supporting roofing elements using profiled steel sheet with optimum crown height could be used in housing construction.

Item Type:Thesis (Masters)
Subject:Roofing, Iron and steel - Case studies
Chairman Supervisor:Professor Abang Abdullah Abang Ali
Call Number:FK 2005 5
Faculty or Institute:Faculty of Engineering
ID Code:5979
Deposited By: Nur Izyan Mohd Zaki
Deposited On:06 May 2010 08:11
Last Modified:27 May 2013 07:26

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 06 May 2010 08:11.

View statistics for "Structural Strength and Behaviour of Cylindrical Steel Sheet Roofing "


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.