ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2014, Vol. 34 ›› Issue (增刊): 1-5.DOI: 10.3973/j.issn.1672-741X.2014.S.001
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CHEN Yaochung1, LIU Hungwei1, CHEN Lihsien2, CHANG Yucheng1
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Abstract:
Tunnel lining could be damaged by tunnel fire, which may directly or indirectly induces the collapsing of tunnel. If engineers could better understand the distribution of thermoinduced damage, they can either improve the design by considering the protective measures beforehand, or they can provide better repairing plans by predicting the damage zones more accurate after tunnel fire. Previous researches used discrete heat treatment method to prepare the specimens; predictions between data points cannot be accurate. In this research, continued heat treatment method was used to prepare the specimens; the tensile strength and fracture toughness of the heattreated specimens were investigated. Based on test results, a more rational and accurate prediction equation is proposed and the critical damaging temperature is found to be about 540~550 ℃. The test results can be used as reference in engineering design for better protection of tunnel lining against fire.
Key words: continued heat treatment method, tunnel fire, LogLog method, tensile strength, fracture toughness
CLC Number:
U 45
CHEN Yaochung, LIU Hungwei, CHEN Lihsien, CHANG Yucheng. Study on Influence of Heat on Tensile Strength and Fracture Toughness of Cementbased Lining by Continued Heat Treatment Method[J]. Tunnel Construction, 2014, 34(增刊): 1-5.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.1672-741X.2014.S.001
http://www.suidaojs.com/EN/Y2014/V34/I增刊/1
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