摘要
设计了一种应用于装配式矩形隧道的卯榫接头,探究了卯榫接头装配式隧道静力行为和内爆作用下的抗爆性能,建立了反映接头非线性力学特征的三维精细化数值模型,利用流固耦合分析实现了TNT爆炸模拟,对比评价了卯榫接头与现浇接头在不同围压荷载作用下的抗压弯承载能力、抗爆性及混凝土损伤特性.结果表明:新型接头抗压弯承载能力略高于现浇接头矩形隧道;在相同当量TNT炸药下,新型接头装配式矩形隧道抗爆能力整体上优于现浇接头矩形隧道;新型接头装配式矩形隧道损伤破坏主要发生在钢柱和顶板-墙结点区域.研究结果为装配式矩形隧道结构设计及防灾减灾提供理论支撑.
A mortise and tenon joint applied to prefabricated rectangular tunnel is designed,and the static behavior and explosion resistance of prefabricated tunnel with this mortise and tenon joint are studied.A three-dimensional refined numerical model reflecting the nonlinear mechanical characteristics of the joint is established,and the TNT explosion simulation is realized by fluid-solid coupling analysis.The compressive bending capacity,explosion resistance and concrete damage characteristics of mortise joint and cast-in-situ joint under different confining pressures are compared and evaluated.The results show that the bending capacity of the new joint is slightly higher than that of the cast-in-situ joint rectangular tunnel.Under the same equivalent TNT explosive,the anti-explosion capacity of the new joint assembled rectangular tunnel is better than that of the cast-in-situ joint rectangular tunnel as a whole.The damage and failure of the new joint assembled rectangular tunnel mainly occurs in the steel column and roof wall joint area.The research results provide theoretical support for the structural design of prefabricated rectangular tunnel and disaster prevention and mitigation.
作者
黄震
张陈龙
白海文
马少坤
HUANG Zhen;ZHANG Chen-long;BAI Hai-wen;MA Shao-kun(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Engineering Disaster Prevention and Structural Safety of the Ministry of Education,Guangxi University,Nanning 530004,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第7期1043-1055,共13页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51678166)
广西研究生教育创新计划项目(JGY2021014).
关键词
装配式隧道
接头
静力行为
抗爆性
损伤特性
assembled tunnel
joint
static behavior
blast resistance
damage characteristics
