管片衬砌结构在接触爆炸荷载作用下的毁伤特性分析  

Damage characteristics analysis for segment lining structures under contact detonation

作　　者：赵跃堂 寇伟晓 储程 胡康 ZHAO Yuetang;KOU Weixiao;CHU Cheng;HU Kang(State Key Lab of Disaster Prevention ＆ Mitigation of Explosion ＆ Impact,Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]陆军工程大学爆炸冲击防灾减灾国家重点实验室,南京210007

出　　处：《振动与冲击》2018年第11期95-100,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51478469);国家自然科学基金创新研究群体基金(51021001)

摘　　要：根据相对于结构的装药起爆位置,可将爆炸分为空爆和接触爆炸,针对管片衬砌结构的抗内部接触爆炸能力进行研究。由于管片衬砌的拼装特点,分析认为接头区和单段完整管片接触爆炸的响应可能显著不同;对此,首先对埋置于土中的全比例钢筋混凝土管片衬砌进行了不同装药位置的接触爆炸试验。试验结果表明,装药在管片接头区时管片的破坏范围和程度明显大于装药在管片中心区域;为进一步分析试验结果,利用LS-DYNA软件进行了有限元模拟分析计算,数值模拟结果验证了试验现象,并通过参数分析研究了管片接头特征对衬砌结构破坏效应影响的规律性。According to explosive detonation location with respect to a structure,explosions can be divided into airblast and contact detonation. Here,the resistance capacity of segmental lining structures to inside contact detonations was studied. Due to the discreteness of segmental lining,analysis showed that the response of its joint area and that of a single complete segment to contact detonation may be significantly different. Firstly,contact detonation tests with different charge locations were conducted on a full proportional reinforced concrete segment lining buried in soil. Test results showed that the scope and extent of damage caused by charge located at joint areas are obviously larger than those caused by charge located at segment central areas. Finite element simulation analysis and calculation were done with the software LSDYNA,the numerical simulation results verified the observed phenomena in tests. Using parametric analysis,the effect laws of segment joint features on damage of segment lining structures were studied.

关 键 词：管片衬砌 接触爆炸 接缝 

分 类 号：U45[建筑科学—桥梁与隧道工程]