【摘 要】
：
In order to define the loading on protective doors of an underground tunnel,the exact knowledge of the blast propagation through tunnels is needed.Thirty-three
【机 构】
：
Department and Architecture and Civil Engineering
论文部分内容阅读
In order to define the loading on protective doors of an underground tunnel,the exact knowledge of the blast propagation through tunnels is needed.Thirty-three scale high-explosive tests are conducted to obtain in-tunnel blast pressure for detonations external,internal and at the tunnel entrance.The cross section of the concrete model tunnel is 0.67 m2.Explosive charges of TNT,ranging in mass from 400 g to 4 600 g,are detonated at various positions along the central axis of the model tunnel.Blast gages are flush-installed in the interior surface of the tunnel to record side-on blast pressure as it propagates down the tunnel.The engineering empirical formulas for predicting blast peak pressure are evaluated,and are found to be reasonably accurate for in-tunnel pressure prediction.
其他文献
经济的快速发展和进步促进了电力行业的发展。电缆是城市电力输送的主要渠道，为城市供电提供保障，是重要的基础设施。当前，城市电缆隧道存在主要的问题就是渗水，加强防水措施有效
沥青混凝土路面的碾压施工技术是保证路面质量的关键环节,如果碾压施工过程没有控制好，将会出现质量缺陷，必将对路面性能造成影响，将会导致泛油、坑槽、疲劳、推拥、松散等病害
介绍了城市道路平面交叉口竖向设计的形式、原则、方法，并通过具体实例对竖向设计进行进一步的解释说明，希望能够为竖向设计的具体工作提供指导与参考。
通过对影响旧路改造因素分析，介绍了旧路改造设计原则及旧沥青路面病害处理,并提出了几点设计要点。
我国经济在飞速发展，城市化进程加快，在城市中的地铁建设与城市建筑的整体规划及设计关系越来越密切，建筑师们也对地铁车站及其附近周围的建筑的设计问题越来越关注，特别是地铁出
The deformation process of H-beams was simulated by explicit dynamic FEM, and the influence of deformation parameters on the spread of rolling piece was obtaine
A number of finite element simulations were performed to analyze the in-plane crushing behaviour of aluminium honeycombs and the results are presented and discu
After a brief review of studies on artificial boundaries in dynamic soil-structure interaction, a three-dimensional viscous-spring artificial boundary (VSAB) in
To model the damage process of masonry walls under blast loading,a dynamic continuum damage material model is constructed for brick and mortar separately.The de