胶合竹结构墙体的抗火试验及分析

EXPERIMENTAL RESEARCH ON FIRE-RESISTANT PERFORMANCE OF GLUBAM STRUCTURAL WALL

胶合竹结构墙体的抗火性能是竹结构房屋抗火性能的重要影响因素,但这方面的研究还处于空白。对1片胶合竹结构非承重墙体进行大尺寸的标准耐火试验,按照ISO 834标准升温曲线进行升温,获得竹胶合墙体构件火灾过程中的升温特点、破坏现象和破坏模式,得到各测点的升温曲线、分布情况及耐火极限。并采用火灾动态模拟软件FDS模拟该胶合竹结构墙体的火灾试验过程。研究结果表明:胶合竹结构墙体构件背火面的最高升温不超过90℃,且温度分布与测点位置密切相关;墙体破坏模式为E类,耐火极限超过60 min,超过了GB 50005—2003《木结构设计规范》对该类墙体耐火极限的要求;火灾动力学模拟器FDS能较好地模拟胶合竹结构墙体构件火灾下的温度变化过程,模拟结果与实测结果的温升趋势和分布情况基本吻合。由于胶合竹结构墙体的抗火性能影响因素复杂,还需要进行系统研究。

Fire-resistant performance of GluBam wall is one of most important factors for the modern bamboo structural buildings.However, the research in this field is still in the blank.In this paper, a fire-resistant test of the full-scale GluBam wall was conducted under ISO standard temperature curve.The temperature characteristics, fireresistant influence factors and failure mode were gained after the test.Temperature curves of each measuring point, temperature distribution and fire-resistant limit were also recorded.Using fire dynamics simulation software FDS to simulate the gluing bamboo wall structure under ISO 834 standard fire conditions.The research results showed that the unexposed surface highest temperature did not exceed 90℃and the temperature distribution was closely related to the measuring point location.The failure mode was E class.The duration of fire resistance was more than 60 min, which could well meet the requirements of code.The fire dynamics simulator, FDS, could be well used to simulate the temperature of GluBam structural wall under the test conditions.The temperature rising trend and distribution were basically consistent between the simulated results and measured ones.The factors which influence fire-resistant performance of GluBam wall need to be researched further.