Ahmet Can Altunişik, Yunus Emrahan Akbulut, Süleyman Adanur, Murat Günaydin, Sara Mostofi, Ayman Mosallam
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This study set out to experimentally investigate the effectiveness of two insulation systems, “FIRECOAT” and “REALROCK” on fire performance of CFRP and GFRP strengthened concrete specimens. Various configurations and exposure durations were considered to evaluate the effectiveness of insulating materials. To perform the experiments, cylindrical concrete specimens were fabricated and strengthened using CFRP or GFRP. After insulating the specimens, they were exposed to a standard fire curve for two different durations of 30 and 60 min. The results indicate that less than 30 min of fire, both insulation systems can provide the required protection. During long exposure duration of 60 min, only REALROCK can provide the required thermal resistance for FRP-strengthened concrete. Within the tested materials, Fire Set 60 outperformed other insulating materials. 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引用次数: 0
摘要
摘要过去二十年来,纤维增强聚合物(FRP)复合材料在不同工程领域的应用取得了快速发展。frp具有高强度重量比、耐腐蚀性和定制性等优点,因此人们对其在广谱修复和结构加固中的应用产生了极大的兴趣。尽管frp具有许多优点,但它对高温非常敏感,这对建筑物等潜在火灾结构构成了主要问题。采用适当的保温材料可以提高FRP的防火性能,减少FRP加固构件可能受到的火灾损害。本研究旨在实验研究两种保温系统“FIRECOAT”和“REALROCK”对CFRP和GFRP增强混凝土试件防火性能的影响。考虑了不同的结构和暴露时间来评估绝缘材料的有效性。为了进行试验,圆柱形混凝土试件采用CFRP或GFRP加固。绝缘后,试样暴露在标准火灾曲线中30和60分钟。结果表明,在30分钟的火灾中,两种绝缘系统都能提供所需的保护。在长达60分钟的暴露时间内,只有REALROCK才能提供frp增强混凝土所需的热阻。在测试材料中,Fire Set 60的性能优于其他绝缘材料。结果表明,在保温层最内层实施Fire Set 60对于防止火灾导致frp增强混凝土构件强度降低至关重要。
Experimental Study of the Effect of Different Insulation Schemes on Fire Performance of FRP Strengthened Concrete: FIRECOAT and REALROCK
Abstract The past two decades have witnessed rapid advances in the use of fiber-reinforced polymer (FRP) composites in different engineering fields. Advantages such as high strength-to-weight ratio, corrosion resistance, and tailority have led to immense interest in the use of FRPs in wide spectrum repair and strengthening of structures. Despite their many advantages, FRPs are highly sensitive to high temperatures, which pose a major concern for fire potential structures such as buildings. Applying proper thermal insulation can enhance the fire performance of FRP and reduce the possible fire damage to the FRP strengthened element. This study set out to experimentally investigate the effectiveness of two insulation systems, “FIRECOAT” and “REALROCK” on fire performance of CFRP and GFRP strengthened concrete specimens. Various configurations and exposure durations were considered to evaluate the effectiveness of insulating materials. To perform the experiments, cylindrical concrete specimens were fabricated and strengthened using CFRP or GFRP. After insulating the specimens, they were exposed to a standard fire curve for two different durations of 30 and 60 min. The results indicate that less than 30 min of fire, both insulation systems can provide the required protection. During long exposure duration of 60 min, only REALROCK can provide the required thermal resistance for FRP-strengthened concrete. Within the tested materials, Fire Set 60 outperformed other insulating materials. It was observed that implementing Fire Set 60 in the innermost layer of thermal insulations has crucial importance in preventing the fire induced reductions in strength of FRP-strengthened concrete elements.
期刊介绍:
The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on
Properties and performance of concrete and concrete structures
Advanced and improved experimental techniques
Latest modelling methods
Possible improvement and enhancement of concrete properties
Structural and microstructural characterization
Concrete applications
Fiber reinforced concrete technology
Concrete waste management.