دانلود رایگان مقاله لاتین شیشه دو جداره از سایت الزویر
عنوان فارسی مقاله:
تعیین شرایط شکستگی بحرانی برای شیشه های دو جداره در آتش
عنوان انگلیسی مقاله:
Determination of critical breakage conditions for double glazing in fire
سال انتشار : 2017
برای دانلود رایگان مقاله شیشه دو جداره اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Glass is extensively employed in building façades, but different from concrete and steel, it is very prone breaking and falling out when subjected to a fire and thus considered as the weakest part in envelope materials [1,2]. During the fast development of a compartment fire (normally ventilation controlled fire), the fracture and fallout of glass will create a new vent that allows fresh air entrance and fire spread outside. Flashover or backdraft will occur at this time, finally resulting in serious disasters. Therefore, glass breaking in fires is an important structural issue and its accurate prediction is critical to fire modeling. After Emmons’ pioneering work [3], a large amount of experimental [4–9] and numerical [10–13] work has been performed to investigate the glass behavior under fire conditions. Some factors, including glass types [5], frame protection [6], edge condition [11] and fire location [13], which may affect glass breakage, were analyzed. A consensus has been reached that the thermal gradients between the shaded and exposed regions of the glass is the primary cause for glass crack initiation. To date, almost all the previous work studied fire response of single glazing, however, very limited research has focused on double glazing unit [14]. Double glazing involves two layers of glass with a small air gap between them. Compared with single glazing, double glazing unit is a very poor conductor which reduces the rate of heat loss through the window (or façade) and unwanted noise [15]. Thus, in advanced glazing systems, double glazing instead of single glazing is increasingly used to provide more environmentally friendly and energy conservation building surfaces. Nevertheless, the extensive use of double glazing brings new fire potential risk and makes the façade easily fail to comply with national fire safety codes. The current information concerning heat transfer and fracture mechanism in double glazing is insufficient to provide reference for fire safety design.
برای دانلود رایگان مقاله شیشه دو جداره اینجا کلیک نمایید.
کلمات کلیدی:
Determination of critical breakage conditions for double glazing in fire en.ahau.findplus.cn/?h=articles&db=edselp&an... Translate this page In this work, nine double glazing units were heated by a 500×500mm2 pool fire. The incident heat flux, temperature on four surfaces, breakage time and cracking ... Glass Breaking In Fires - CiteSeerX citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1030.3744&rep=rep1...pdf by PJ PAGNI - Cited by 72 - Related articles for the glass temperature increase, tiT, required to break windows in fires, .... conditions in the compartment to change dramatically, as indicated by the hot layer ... Construction Materials: Types, Uses and Applications https://books.google.com/books?isbn=0471851450 Caleb Hornbostel - 1991 - Technology & Engineering Insulating glass made with double-strength window (sheet) glass should be ... Various codes (local, state, and also those of the Fire Underwriters, ... of the various glass types and for testing under the climatic conditions of the proposed building. ... of insulating glass selected, as many of these glasses are prone to breakage ... Searches related to breakage conditions for double glazing in fire at what temperature does glass break what cold temperature does glass break what temperature does glass break in the oven can glass shatter from heat how hot can glass get before it breaks glass breakage in fires why does glass break when frozen why do windows break in a fire
