Performance appraisal on modern building envelopes under repeated applications of wind actions

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Performance appraisal on modern building envelopes under repeated applications of wind actions


Author: Qin, Jie-qiong
Title: Performance appraisal on modern building envelopes under repeated applications of wind actions
Degree: M.Sc.
Year: 2014
Subject: Metal roofing.
Hong Kong Polytechnic University -- Dissertations
Department: Faculty of Construction and Environment
Pages: xiii, 91 leaves : illustrations ; 30 cm
Language: English
Abstract: The performance of building envelopes is becoming increasingly important. Poor building envelope performance is generally reckoned to be one of the leading causes of damage to buildings under wind actions. The most frequently damaged parts of building envelopes are roof systems, lightweight wall covers and windows. Therefore, this research study examines the endurance of structural integrity of modern roof systems under wind actions. A comprehensive experimental investigation has been carried out to obtain technical information on the structural behavior of key connection of the metal roof systems in order to examine the uplift behavior of metal roof panels under realistic wind actions. Moreover, a case study was also conducted to study the long-term performance as well as the functionality requirements of building envelopes. A total of sixteen pull-out tests of panel-to-clip joints were conducted under two different test methods to assess their structural performance, in particular, their pull-out resistances. Comparison on the behavior of the test specimens with two different test methods was carried out to further understand the failure mechanism of the roof systems and to suggest improvements to increase the resistances of metal roof systems against wind actions. Moreover, a case study on the metal roof systems of Macau Dome was carried out to study the practical requirements for metal roof systems in Hong Kong and Macau. Comparison on data from design analyses, wind tunnel tests, FEM analyses, static wind load tests as well as dynamic wind load tests are covered. This dissertation presents detailed findings on the structural performance of metal roof systems and their long term performance against wind actions. The test results of 16 pull-out tests of the panel-to-clip joints under two different methods are presented as a reference to practical design and construction of metal roof systems in modem building envelopes.

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