内夹单层镀锌板复合望板系统耐火性能研究  

Research on Fire Resistance of the Composite Roof Boarding System with Single Galvanized Sheet Inside

作　　者：郭世庆 刘永军[1] Guo Shiqing;Liu Yongjun

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《重庆建筑》2024年第2期60-63,共4页Chongqing Architecture

基　　金：“十三五”国家重点研发计划项目“村镇建筑火灾灾变机理与适应性防火理论体系”(2018YFD1100403)。

摘　　要：为了研究新型木-钢结构望板系统相对于传统木结构望板系统及冷摊瓦屋顶系统耐火极限性能,该文采用Abaqus模拟软件建立了有限元分析模型。在标准升温曲线下,对三种屋顶系统进行温度场模拟分析。结果得出,随着时间及温度的增加,传统木结构望板系统及冷摊瓦屋顶系统中,木板先于木梁炭化完全;新型木-钢结构望板系统中,木板后于木梁炭化完全且上下两板炭化速度有明显改变。之后对三种屋顶系统在同等荷载作用下,进行结构场分析,结果表明:新型木-钢结构望板系统耐火极限相对于传统木结构望板系统提高73%,相对于冷摊瓦系统提高52%。得出新型木-钢结构望板系统具有更好的耐火性能,可为村镇木结构建筑和改造提供参考。In order to study the fire resistance limit of the new composite wood-steel structured roof boarding system compared with that of the traditional roof boarding system and the cold tile roof system,the finite element analysis model was established by using Abaqus simulation software.Under the standard temperature rise curve,the temperature field simulation analysis of three kinds of roof systems was carried out.The results showed that with the increase of time and temperature,in the traditional roof boarding system and the cold tile roof system,the wood plate is carbonized earlier than the wood beam;In the new wood-steel structured roof boarding system,the wood plate is carbonized later than the wood beam and the carbonization speed of the upper and lower plates obviously changes.Then,the structural field analysis of the three roof systems under the same load was carried out.The results showed that the fire resistance limit of the new composite roof boarding system is 73%higher than that of the traditional roof boarding system,and 52%higher than that of the cold tile system.It is concluded that the new wood-steel structure system has better fire resistance,which can provide reference for the wood structure construction and renovation in villages and towns.

关 键 词：火灾模拟 新型复合望板 温度场 耐火极限 

分 类 号：TU352.5[建筑科学—结构工程]