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近爆下泡沫混凝土复合结构在地下洞室的抗爆特性数值研究
Numerical research on anti-explosion capacity of foam concrete composite structure in underground openings under close-in explosion
投稿时间:2017-12-18  修订日期:2018-01-25
DOI:
中文关键词:  地下洞室  泡沫混凝土  抗爆设计  数值模拟  
英文关键词:underground caverns  foam concrete  anti-blast design  numerical simulation  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
陈锐林 湖南省湘潭大学 chenruilin8@hotmail.com 
禹兵兵 湖南省湘潭大学 1345361451@qq.com 
董琪 湖南省湘潭大学  
李康 湖南省湘潭大学  
张文宽 湖南省湘潭大学  
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中文摘要:
      为研究近爆作用下带泡沫混凝土复合结构的地下洞室的抗爆性能,基于LS-DYNA非线性有限元软件,建立了TNT炸药—围岩—锚杆—衬砌结构—空气的爆炸效应全耦合模型。应用ALE多物质流固耦合算法对比分析了普通衬砌结构洞室和带泡沫混凝土夹层的衬砌结构洞室的重要控制测点的应力、空气层压力、位移。测点峰值应力与TM5-855-1中经验公式吻合良好,证明了数值模拟的可靠性。数值研究结果表明:相比普通混凝土夹层,泡沫混凝土夹层能够有效地削弱爆炸冲击波的传播,大幅降低洞室内部空气的压力峰值,降低超压对人体器官的损伤,提高洞室内部人员的生存几率;采用泡沫混凝土夹层的衬砌需加强拱顶区域的刚度以降低顶底板相对位移差。研究结果可以为地下洞室抗爆设计提供参考依据。
英文摘要:
      n order to study the antiknock performance of underground caverns with foam concrete composite structure under near explosion, the explosion effect of TNT explosives-surrounding rock-anchor-lining structure-air was established based on LS-DYNA nonlinear finite element software model. ALE multi-material fluid-solid coupling algorithm was used to analyze and compare the stress, air layer pressure and displacement of the important control points of tunnel with ordinary lining structure and lining structure with foam concrete interlayer. Measured point peak stress and TM5-855-1 empirical formula in good agreement, The reliability of numerical simulation is proved. The numerical results show that the foam concrete sandwich can effectively reduce the propagation of blast shock wave, reduce the peak pressure of air inside the chamber, reduce the damage of overpressure to human organs and improve the survival probability of internal personnel in the chamber, compared with ordinary concrete sandwich. Lining with foam concrete interlayer needs to reinforce the stiffness of the dome area to reduce the relative displacement difference between the top and bottom panels. The research results can provide a reference for anti-explosion design of underground caverns.
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