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Blast resistance evaluation of urban utility tunnel reinforced with BFRP bars

Blast resistance evaluation of urban utility tunnel reinforced with BFRP bars

作     者:Qiang Zhou Hu-guang He San-feng Liu Xiao-shuo Chen Ze-xun Tang Yang Liu Zhen-yu Qiu Sen-sen Li He Wang Yin-zhi Zhou Jian-nan Zhou Hua-lin Fan Feng-nian Jin Qiang Zhou;Hu-guang He;San-feng Liu;Xiao-shuo Chen;Ze-xun Tang;Yang Liu;Zhen-yu Qiu;Sen-sen Li;He Wang;Yin-zhi Zhou;Jian-nan Zhou;Hua-lin Fan;Feng-nian Jin

作者机构:State Key Laboratory for Disaster Prevention&Mitigation of Explosion&ImpactArmy Engineering University of PLANanjing210007China Research Center of Lightweight Structures and Intelligent ManufacturingState Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjing210016China 

出 版 物:《Defence Technology(防务技术)》 (Defence Technology)

年 卷 期:2021年第17卷第2期

页      面:512-530页

核心收录:

学科分类:081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基  金:Supports from National Natural Science Foundation of China(51778622,11672130,and 11972184) Social Development Project of Science and Technology Department of Jiangsu Province(BE2017780) State Key Laboratory for Disaster Reduction in Civil Engineering(SLDRCE16-01) State Key Laboratory of Mechanics and Control of Mechanical Structures(MCMS-0217G03)are gratefully acknowledged 

主  题:Utility tunnel BFRP bars Explosion Dynamic response Crack Dynamic theory 

摘      要:To improve corrosion-resistance of shallow-buried concrete urban utility tunnels(UUTs),basalt fiber reinforced polymer(BFRP)bars are applied to reinforce *** the UUT must have excellent survival capability under accidental explosions,a shallow-buried BFRP bars reinforced UUT(BBRU)was designed and *** blast experiments were carried out on this *** responses,damage evolutions and failure styles of the BBRU under repetitive explosions were *** tunnel roof is the most vulnerable component and longitudinal cracks develop along the *** the scaled distance is larger than 1.10 m/kg1/3,no cracks are observed in the *** the BBRU is severely damaged,there are five cracks forming and developing along the *** roof is simplified as a clamped-supported one-way slab,proved by the observation that the maximum strain of the transverse bar is much larger than that of the longitudinal *** responses of the roof slab are predicted by dynamic Euler beam theory,which can consistently predict the roof displacement under large-scaleddistance *** with the UUT reinforced with steel bars,the BBRU has advantages in blast resistance with smaller deflections and more evenly-distributed cracks when the scaled distance is smaller than 1.260 m/kg1/3 and the steel bars enter plastic *** elastic defamation of the BFRP bars endows the UUT more excellent blast resistance under small-scaled-distance explosions.

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