中文摘要：

为研究单层索网点支玻璃幕墙中所常用的单层和中空钢化玻璃在火灾下的受力性能以及破坏机理,对5组钢化玻璃进行了相同火灾条件下的负载试验研究。试验重点考察了玻璃的破坏模式、玻璃破坏时的变形挠度、玻璃破坏时间、破坏时的临界温度以及试验过程中玻璃的位移发展情况等,并在试验基础之上进行了玻璃面板在火灾高温下的破坏机理分析。研究结果表明：火灾高温条件下玻璃由于受热膨胀不均匀在表面产生的拉应力是其破坏的主要原因;单层钢化玻璃的破坏临界温度为520℃左右,而中空玻璃面板为450-550℃;玻璃面板承受的均布荷载将在玻璃内部产生荷载应力,并导致其面外变形增大。

英文摘要：

In order to research the mechanical properties and failure mechanism of single-layer and mid-hollow tempered glass of single-layer cable net point-supported glass wall under fire condition, loading tests were conducted on five groups tempered glass under the same fire condition. The tests mainly investigated the failure modes, failure deflection, failure time, critical temperature and the development of displacement during the experiment of glass. Based on the experiment, the failure mechanism of glass under fire condition was analyzed. The research results indicated that the tensile stress caused by uneven heating expansion on the surface was the main reason for failure of glass. The failure critical temperature of single-layer tempered glass was about 520℃ and 450 -550 ℃ for midhollow tempered glass. The uniform load sustained by glass panel would produce load stress inside the glass, which would result in the increase of out-plane deformation of glass.