SFRC exposed to high temperature: Hot vs. residual characterization for thin walled elements
SFRC exposed to high temperature: Hot vs. residual characterization for thin walled elements
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DOI：
10.1016/j.cemconcomp.2015.01.002
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发表时间：
2015-04
影响因子：
10.5
通讯作者：
M. Colombo;M. Prisco;R. Felicetti
中科院分区：
文献类型：
--
作者：
M. Colombo;M. Prisco;R. Felicetti
本文提出了一种基于无缺口四点弯曲试验的实验研究方法。目的是对钢纤维混凝土薄板的耐高温性能进行校核。防火建议应用于SFRC结构需要了解高温暴露导致的抗拉强度下降。文献中可用的数据很少，但在“残余”条件下可以获得有用的信息，即在适当的热循环后在室温下测试样品。本文讨论了试验条件（热、残余）对材料拉伸力学性能的影响，采用试验程序对试样产生的自应力进行了评估，并根据2010年《模型规范》提出的设计方法，对SLS和ULS开裂后拉伸性能的变化进行了分析。
An experimental investigation based on unnotched four point bending tests is here presented. It aims to check the high temperature resistance of thin slabs made of steel fiber reinforced concrete (SFRC). The application of fire recommendations to SFRC structures requires knowledge of the tensile strength decrease due to high temperature exposure. Very few data are available in the literature, but useful information could be obtained in “residual” conditions, i.e. by testing the specimen at room temperature after a suitable thermal cycle. The paper discusses the influence of the testing conditions (hot vs. residual) on the tensile mechanical behavior of the material, the evaluation of self-stresses induced in the samples by the test procedure adopted and the variation of post-cracking tensile properties at SLS and ULS according to the design approach proposed by Model Code 2010.