Dimensionamento Térmico e Mecânico de Vidros

• Author(s): Maria Francisca Lima Carneiro Cavaleiro
• Date: 2011
• Persistent ID: https://hdl.handle.net/10216/102209
• Origin: Repositório Aberto da Universidade do Porto
• Subject(s): Engenharia civil; Civil engineering
• Document Type: Master thesis
• Language: Portuguese

Description

The idea of a study for the calculation of glass properties arises from the growing utilization of this material in construction. Architectonic trends have dictated ever increasing window pane spans as well as an increase of user' notions and demands of comfort. Situations of breakage by thermal shock and mechanical actions are also associated with the increment in the use of this material. Increased expression of glass in construction brings greater responsibilities in its application and justifies the development of methodologies for the calculation of its properties. Due to the fact that in Portugal there is no clear methodology for the calculation of the thermal and mechanical properties of glass, it is our intention to adapt French standards to the Portuguese situation, including the compilation of information from some Portuguese documents. The proposed methodologies are transposed to "easy to use" spreadsheets supported by a "user's guide". These spreadsheets, named "Thermal Shock" and "Mechanical Property Calculation", are a useful tool to support thermal and mechanic calculation of glass properties and are the basis of this study. Making use of these spreadsheets, sensibility studies of some parameters are made, some types of glass in the market are evaluated, some assumptions are clarified and graphs that will aid glass pre-sizing are drawn. In the end, a small example with the application of this methodology to two distinct Oporto buildings is presented. This study aims to demonstrate the usefulness of a quantitative methodology to prevent breakage by thermal shock and mechanical disruption. Keywords: Glass, Thermal properties calculation, Mechanical properties calculation, Spreadsheet.