| Author: | Li, Jianjun |
| Title: | Wind resistance tests of metal roofing systems under dynamic actions |
| Advisors: | Chung, K. F. (CEE) |
| Degree: | M.Sc. |
| Year: | 2019 |
| Subject: | Metal roofing Roofs -- Design and construction Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Civil and Environmental Engineering |
| Pages: | xx, 114 pages : color illustrations |
| Language: | English |
| Abstract: | In recent years, the performance of building envelopes has become increasingly significant, and a number of experimental investigations into structural behavior of building envelopes have been conducted around the world. As metal roofing systems are increasingly applied in various large structures due to their high strengths and small self-weights, it is essential to evaluate the long-term performance of the metal roofing systems under extreme wind actions such as typhoons. Therefore, this project aims to examine wind resistances of the metal roof systems under repeated dynamic actions. A comprehensive experimental investigation was executed to assess the structural performance of metal roof panels of two different configurations under 5000 cycles of dynamic wind suctions. Prior to the experimental investigation, it is important to make a comparison among various test protocols in order to choose the most suitable one for the wind suction test in this project. The following test protocols were studied and compared: ASTM E1592, UL580, UL1897, FM4471, CSA A123.21-04(Canada), MCIS-PP/T-01:2014(Macau), DBJ/T 15-148-2018(GD Standard). Finally, CSA A123.21-14(Canada) was adopted for this project because it provides a realistic test protocol for evaluation of wind uplift resistances of common metal roof systems in Hong Kong. In order to evaluate the structural performance of metal roofing systems, two types of metal roof panels were adopted in this project, and configurations and dimensions of these panels and their attachments were introduced. Two series tests were carried out to investigate the performance of each type of the panels under dynamic wind suctions. Detailed findings on the structural behavior of these metal roofing systems under dynamic wind suctions are presented in this thesis. The test results of two test series and the failure modes of the specimens are also reported, recommendations are given based on the analysis for improvement on these metal roofing systems. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 5277.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 6.04 MB | Adobe PDF | View/Open |
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