考虑裂缝影响的CFRP筋组合梁耐火性能研究
Research on Fire Performance of CFRP Reinforced Concrete Beams with Effect of Cracks

作者: 朱庸 :和记黄埔地产深圳分公司,广东 深圳; 查晓雄 :哈尔滨工业大学深圳研究生院,广东 深圳;

关键词: CFRP筋裂缝高温承载力CFRP Bars Crack High Temperature Bearing Capacity

摘要:
碳纤维增强塑料筋(CFRP筋)因其耐腐蚀等优点被应用于组合梁。现在研究其耐火性能的计算一般认为混凝土没有开裂,与实际情况存在差别,并带来安全问题。本文基于ISO834标准升温曲线模拟CFRP组合梁在室内火灾下的情况,考虑CFRP筋组合梁在弯曲荷载和温度荷载共同作用下的耐火极限和受力分析。通过建立火灾下考虑裂缝影响的CFRP筋组合梁热力耦合模型,得到裂缝对不同保护层厚度、配筋率和作用荷载比的CFRP筋混凝土梁耐火极限的影响规律,总结出CFRP筋组合梁的防火相关设计建议。

Abstract: Carbon fiber reinforced polyester (CFRP) bars are used in the concrete members for its good corrosion resistance. Normal fire resistance analysis doesn’t consider the cracks, which doesn’t conform to reality and results security problem. This paper simulates the room fire with ISO834 standard temperature curve. The fire resistance and load capacity of CFRP reinforced concrete beams under the bending load and temperature load are analyzed. Comparing the effect of cracks on the CFRP reinforced concrete beams with different cover thicknesses, reinforcement ratios and load values under fire, suggestions for fire designing work are given in the end.

文章引用: 朱庸 , 查晓雄 (2017) 考虑裂缝影响的CFRP筋组合梁耐火性能研究。 土木工程, 6, 215-220. doi: 10.12677/HJCE.2017.62023

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