Study of Crack Generation and Expansion Behavior of Frame-Supported Float Glass after Heat Exposure

IF 3 3区 农林科学 Q2 ECOLOGY
Yan-ni Zhang, Luoxin Huang, Jun Deng, Zhichao Feng, Dan Yang, Xuemeng Liu, Shuai Zhang
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引用次数: 0

Abstract

Float glass installed with frame supports is broadly exploited in building construction. In a fire environment, the breakage of float glass significantly influences the dynamic development of the fire within the building space. The thermal rupture behavior of the frame-supported float glass subjected to thermal loading is carefully examined using a self-built experimental system. The designed system is aimed at capturing crucial behavioral parameters. The experimental study reveals that the main reason for the breakage of the frame-supported float glass is the temperature difference on the glass surface, with a critical temperature difference of approximately 65 °C. The crack starts at the edge of the glass surface where the temperature difference is maximum and then rapidly expands. By intersecting the cracks, a crack island is configured, which is not dislodged under the stress of the supporting frame and the surrounding glass. A thermomechanical and micro-geometric model of the frame-supported float glass is developed based on the PFC2D program to show further the micro-crack expansion pattern of the frame-supported float glass under thermal loading. This scrutiny provides theoretical guidance for installing and using frame-supported float glass in construction projects and identifying fire evidence.
框架支撑浮法玻璃热暴露后裂纹产生及膨胀行为研究
框架支承浮法玻璃在建筑施工中得到了广泛的应用。在火灾环境下,浮法玻璃的破碎对建筑空间内火灾的动态发展有着重要的影响。采用自建实验系统,研究了框架支撑浮法玻璃在热载荷作用下的热破裂行为。所设计的系统旨在捕获关键的行为参数。实验研究表明,框支浮法玻璃破碎的主要原因是玻璃表面的温差,其临界温差约为65℃。裂纹从玻璃表面温差最大的边缘开始,然后迅速扩大。通过将裂缝相交,形成一个裂缝岛,在支撑框架和周围玻璃的压力下不会位移。基于PFC2D程序建立了框架式浮法玻璃的热力学和微几何模型,进一步揭示了框架式浮法玻璃在热载荷作用下的微裂纹扩展规律。这种审查为在建筑项目中安装和使用框架支撑浮法玻璃和识别火灾证据提供了理论指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Fire-Switzerland
Fire-Switzerland Multiple-
CiteScore
3.10
自引率
15.60%
发文量
182
审稿时长
11 weeks
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