爆炸冲击下隧道衬砌及周围各向异性砂土动力响应  

Dynamic response of tunnel lining and surrounding orthotropic sand under explosive shock

作　　者：王滢 孔凡玲 高盟 吴迪[3] WANG Ying;KONG Fanling;GAO Meng;WU Di(College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Shandong Province Key Laboratory of Civil Engineering&Disaster Prevention and Mitigation(Shandong University of Science and Technology),Qingdao,Shandong 266590,China;School of Civil Engineering,Suzhou Univercity of Science and Technology,Suzhou,Jiangsu 215129,China)

机构地区：[1]山东科技大学土木工程与建筑学院,山东青岛266590 [2]山东省土木工程防灾减灾重点实验室(山东科技大学),山东青岛266590 [3]苏州科技大学工木工程学院,江苏苏州215129

出　　处：《中国科技论文》2023年第8期842-851,共10页China Sciencepaper

基　　金：国家自然科学基金资助项目(51808324)。

摘　　要：为研究隧道衬砌及周围正交各向异性砂土的爆炸反应特性,基于流固耦合算法,建立炸药-空气-混凝土衬砌-正交各向异性砂土三维有限元模型,分析爆炸冲击作用下隧道衬砌及周围正交各向异性砂土的位移、速度及应力时程曲线变化规律。结果表明:隧道衬砌和正交各向异性砂土的位移变化趋势基本一致,拱顶水平位移趋近于0,衬砌结构整体沿竖直方向向上移动;拱底周围与其他位置相比受损最为严重,在进行隧道抗爆设计时应尤其注意拱底的安全防护;衬砌应力分布与砂土相比存在显著差异,衬砌应力变化更为剧烈,最大应力至少为砂土的20倍。In order to study the explosion response characteristics of tunnel lining and surrounding orthotropic sand,a three-dimensional finite element model of the explosive-air-concrete lining-orthotropic sand was established based on the fluid structure coupling algorithm,and the variation laws of displacement,velocity and stress-time history curves of tunnel lining and surrounding orthotropic sand under explosive impact were analyzed.The results show that the displacement trends of tunnel lining and anisotropic sand are basically the same,the horizontal displacement of arch crown approaches zero,and the whole lining structure moves upward along the vertical direction.Compared with other positions,the damage around the arch bottom is the most serious,so special attention should be paid to the safety protection of the arch bottom in the explosion-proof design of the tunnel.Compared with the sandy soil,the lining stress distribution is significantly different,and the lining stress changes more drastically,and the maximum stress is at least 20 times that of the sandy soil.

关 键 词：正交各向异性砂土 隧道衬砌 爆炸冲击 动力响应 

分 类 号：TU435[建筑科学—岩土工程]