使用耐火材料的CFRP增强型飞行员式柱子在标准火灾暴露期间的防火性能
Jinwon Shin1, Hansol Lee1, In-Rak Choi2
1Department of Architectural Engineering, Catholic Kwandong University, Gangneung, Korea.
Scientific reports
|October 9, 2024
概括
这项研究从数值上研究了碳纤维增强聚合物 (CFRP) 增强混凝土柱的耐火性. 防火系统在标准火灾暴露下有效地保持了4小时的结构完整性.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 消防安全工程 消防安全工程
背景情况:
- 试验式建筑中的钢筋混凝土 (RC) 柱子容易受到火灾的影响.
- 碳纤维增强聚合物 (CFRP) 加强增强结构能力,但需要防火保护.
- 评估受保护的CFRP增强柱的耐火性对于建筑安全至关重要.
研究的目的:
- 用耐火材料对用CFRP增强的RC柱的耐火性进行数值研究.
- 为了评估标准火灾暴露下的热性能和结构性能.
- 验证不同防火系统的有效性.
主要方法:
- 进行了完全合的热应力数值分析.
- 该模型根据实验数据和ACI 440.2R-17指南进行了验证.
- 在模拟中,强化的柱子被ASTM E119标准的时间-温度曲线4小时.
主要成果:
- 该研究分析了基于玻璃过渡温度,聚合物点火,钢筋关键温度和负载能力的热和结构行为.
- 对于喷涂防火材料 (SFRM) 和Sikacrete®-213 F在各种绝缘厚度 (10-30毫米) 中进行了比较评估.
- 防火系统在4小时的火灾暴露期间证明了在保持柱子完整性方面的有效性.
结论:
- 数值模型提供了一种可靠的方法来评估受保护的CFRP增强柱的耐火性.
- 有效的防火保护对于保持CFRP增强元件在试验型建筑中的结构性能至关重要.
- 耐火材料的选择和厚度显著影响了加强的柱子的耐火性.
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