近爆下泡沬混凝土复合结构在地下洞室的 抗爆特性数值研究.

In order to study the antiknock performance of underground caverns foam concrete composite structure under near an explosion，the explosion effect of TNT explosivejsurrounding rockanchor-lining structure-air was established based on a nonlinear finite elemontNLp-DYN A model, ALE multi-material fluid-solid coupling algorithm was used to analyze and/ompre the stress，air layer pressure and displacement of the important control points of a ordinary lining structure and a lining structure with a foam concrete interlayer. Measured '-point peak stresses and TM5-855-1 empirical formula are in good agreement. The reliability of thevnymjjrica 1 simulation is proved. The numerical results show that the foam concrete sandwich caiteffestively reduce the propagation of blast shock wave? reduce the peak pressure of air inside the ciiainbjEr? reduce the damage of overpressure to an organs and unprove the survival probability of with ordinary concrete sandwich. Linings with a foam caner dome area to reduce the relative displacement difference between the top and bottom. [ABSTRACT FROM AUTHOR]

椇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棳基于斕斢灢斈斮斘斄非线性有限元软件棳 建立了斣斘斣炸药灢围岩灢锚杆灢衬砌结构灢空气的爆炸效应全耦合模型暎应用斄斕斉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暍空气层压力和位移暎测点峰 值应力与斣斖椀灢椄椀椀灢棻的经验公式吻合良好棳证明了数值模拟的可靠性暎数值研究结果表明棳相比普通混凝土夹 层棳泡沫混凝土夹层能够有效地削弱爆炸冲击波的传播棳大幅降低洞室内部空气的压力峰值棳降低超压对人体器 官的损伤棳提高洞室内部人员的生存几率椈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 位移差暎研究结果为地下洞室抗爆设计提供了参考依据暎. [ABSTRACT FROM AUTHOR]