Full-scale car fire tests on FRP reinforced RC columns in piloti structures

IF 3.4 3区工程技术 Q2 ENGINEERING, CIVIL

Fire Safety Journal Pub Date : 2024-08-23 DOI:10.1016/j.firesaf.2024.104248

In-Rak Choi , Ji-Hye Park , Jeong-Ki Min , Jinwon Shin , Sungmo Choi

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Abstract

Car fire tests were conducted on fiber reinforced polymer (FRP) reinforced columns to evaluate the fire effects on piloti structures. The study involved a mid-size car (1,998 cc) with fuel and tire air pressure removed to reduce the risk of explosion. The objectives were to measure the heat release rate (HRR) and temperature distributions during the fire and to evaluate the fire behavior of the columns in the piloti structure. Results from the car combustion test showed a total heat release of 5,210 MJ, with a maximum temperature of 455.0 °C at 2.5m height above the car ceiling and an internal temperature of 1025.7 °C near the ignition point at the car seat. In the piloti structure fire test, consisting of four reinforced concrete (RC) columns with and without FRP reinforcement and a roof slab, the maximum temperature reached 728.5 °C under the slab. Thicker FRP reinforcement resulted in lower temperatures on the column surface. Fire Dynamics Simulator (FDS) software was used to validate the test results and showed accurate predicted temperatures at 3m (within 10 % error). However, discrepancies were observed at 2.5m (24 % error) and below, although the simulated fire behavior agreed well with the test results for heights of 2.0m and above.

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试点结构中 FRP 加固 RC 柱的全尺寸汽车火灾试验

对纤维增强聚合物（FRP）加固柱进行了汽车火灾试验，以评估火灾对先导结构的影响。研究涉及一辆中型汽车（1,998 cc），为降低爆炸风险，已去除燃料和轮胎气压。目标是测量火灾期间的热释放率（HRR）和温度分布，并评估 piloti 结构中支柱的火灾行为。汽车燃烧试验的结果显示，总热量释放量为 5210 兆焦耳，汽车顶棚上方 2.5 米处的最高温度为 455.0 °C，汽车座椅着火点附近的内部温度为 1025.7 °C。在 piloti 结构火灾试验中，由四根带或不带玻璃钢加固的钢筋混凝土 (RC) 柱和一块顶板组成，顶板下的最高温度达到 728.5 °C。较厚的玻璃钢加固材料使得柱子表面温度较低。使用火灾动力学模拟器 (FDS) 软件验证了测试结果，结果显示 3 米处的预测温度准确（误差在 10% 以内）。不过，在 2.5 米（误差 24%）及以下的高度，模拟的火灾行为与 2.0 米及以上高度的测试结果吻合得很好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fire Safety Journal 工程技术-材料科学：综合

CiteScore

5.70

自引率

9.70%

发文量

153

审稿时长

60 days

期刊介绍： Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.