爆炸作用下浅埋直墙拱结构的毁伤评估方法与毁伤判据选择  

Damage Evaluation Method and Damage Criterion Selection of Shallow Straight-Wall Arch Structure Under Explosion

作　　者：柏准 胡玉涛[1] 钱秉文[1] 李献 陈昊 张宁[3] BAI Zhun;HU Yutao;QIAN Bingwen;LI Xian;CHEN Hao;ZHANG Ning(Northwest Institute of Nuclear Technology,Xi’an 710024,China;State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA,Nanjing 210007,China;School of Science,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]西北核技术研究所,西安710024 [2]陆军工程大学爆炸冲击防灾减灾国家重点实验室,南京210007 [3]南京理工大学理学院,南京210094

出　　处：《现代应用物理》2024年第3期139-147,共9页Modern Applied Physics

基　　金：国家自然科学基金资助项目(11802248)。

摘　　要：为提出1种针对爆炸作用下浅埋拱结构毁伤的可靠评估方法,对结构毁伤评估的方法和毁伤判据的选择展开了讨论。通过分析钢筋混凝土直墙拱的土中浅埋爆炸试验以及有限元计算结果,将直墙拱结构爆炸作用下的破坏模式总结为弯曲破坏、弯曲-剪切破坏、局部震塌破坏、局部冲切破坏四种破坏模式。总结了结构目标物理毁伤评估的一般思路,讨论了不同破坏模式下毁伤判据的选择,为结构的毁伤等级评估工作的开展奠定了基础。归纳了毁伤判据与毁伤形态、毁伤等级的映射关系,结合毁伤形态对数值模拟结果划分毁伤等级,并比较了不同毁伤判据对等级评估结果准确性的影响,可为毁伤评估判据的选取提供了参考。To put forward a reliable evaluation method for the damage of shallow buried arch structure under explosion,the structural damage evaluation method and damage criterion selection are discussed.By analyzing the test results of shallow buried explosion in soil and the finite element calculation results of reinforced concrete straight-wall arch,the failure of straight-wall arch structure under explosion is summarized into four main failure modes:bending failure,bending-shear failure,local collapse failure and local punching failure.The general idea of physical damage assessment of structural targets is summarized,and how to choose the damage criterion under different failure modes is discussed,which lays a foundation for the damage level assessment of structures.The mapping relationship between damage criterion and damage form and damage grade is summarized.The damage grade is divided according to the numerical simulation results of damage form,and the influence of different damage criteria on the accuracy of grade evaluation results is compared,which provides a reference for the selection of damage evaluation criteria.

关 键 词：浅埋爆炸 直墙拱 物理毁伤评估 毁伤判据 

分 类 号：O383[理学—流体力学] TU93[理学—力学]