Post-fire response of S235 steel plates considering different bolt hole-making processes

IF 0.9 Q4 CONSTRUCTION & BUILDING TECHNOLOGY
Fadwa M. Al Chamaa, Ahmad H. El Ghor, Elie Hantouche
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Abstract

PurposeThis study aims at investigating the effect of bolt hole-making processes on the post-fire behavior of S235 steel plates.Design/methodology/approachA total of nine steel plates with a single bolt hole are tested. The single bolt holes are fabricated using three different hole-making processes: drilling, waterjet and plasma. Among the nine steel plates, three fabricated specimens are control specimens and are tested at ambient temperature. The six remaining steel plates with a single bolt hole are subjected to a complete heating-cooling cycle and then monotonically loaded until failure. The six fabricated specimens are first heated up to two different temperatures 800 and 925 °C, and then cooled back to the ambient prior to loading.FindingsThe results show that after being exposed to post-fire temperatures (800 and 925 °C), the maximum decrease in strength of the S235 steel plate was 6% (at 925 °C), 14% (at 925 °C) and 22% (at 800 °C) when compared to the results of ambient specimens for waterjet, drilled and plasma bolt holes, respectively. For post-fire temperature tests, drilled and waterjet bolt hole-making processes result in having approximately the same load-displacement response, and both have larger strength and ductility than those obtained using plasma cutting.Originality/valueThis study provides preliminary data to guide the steel designers and fabricators in choosing the most suitable hole-making process for fire applications and to quantify the post-fire reduction in capacity of S235 plates.
考虑不同螺栓孔制作工艺的 S235 钢板的火灾后响应
目的 本研究旨在探讨螺栓孔制作工艺对 S235 钢板着火后行为的影响。单个螺栓孔采用三种不同的制孔工艺制作:钻孔、水刀和等离子。在这九块钢板中,三块制作的试样为对照试样,在常温下进行测试。其余六块带单个螺栓孔的钢板经过一个完整的加热-冷却循环,然后单调加载直至失效。结果表明,与水刀、钻孔和等离子螺栓孔的环境试样结果相比,S235 钢板暴露于火灾后温度(800 和 925 °C)后,其强度的最大降幅分别为 6%(925 °C)、14%(925 °C)和 22%(800 °C)。在火灾后的温度测试中,钻孔和水刀螺栓孔制作工艺的载荷-位移响应大致相同,强度和延展性均高于等离子切割工艺。
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来源期刊
Journal of Structural Fire Engineering
Journal of Structural Fire Engineering CONSTRUCTION & BUILDING TECHNOLOGY-
CiteScore
2.20
自引率
10.00%
发文量
28
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