Blast resistance evaluation of urban utility tunnel reinforced with BFRP bars
Blast resistance evaluation of urban utility tunnel reinforced with BFRP bars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.