【作者】 赵静；

【导师】 吕和林；

【作者基本信息】 西南交通大学 ， 岩土工程， 2006， 硕士

【摘要】 为了适应现代战争的需求,我军某研究部门研制开发了一种先进的装配式防护结构,该防护结构的基本构件采用了一种新型的复合材料——钢板—钢筋骨架—聚氨酯泡沫复合夹层板,使这种防护结构具有了轻质高强、施工快捷、且抗冻保温等优点。但这种防护结构在爆炸冲击作用下的动荷载分布特点和变形规律以及覆土浅埋后如何加强其抵抗爆炸荷载的性能等方面的问题,目前仍在不断的研究和探索中。 本文以装配式防护结构现场化爆试验研究为基础,分析了爆炸荷载经过覆盖层缓冲后作用在防护构件上表面的动荷载分布特点及相应的构件变形规律;并通过在构件上方埋设消能层的方式,分析消能层在覆土中所起的消能作用,提出进一步提高结构抗爆能力的可能途径及相关研究发展方向。 为正确评估装配完成并浅埋的防护结构的抗爆性能以及消能层对改善防护结构抗爆性能所起到的作用,本文通过有限元方法对覆土中防护结构整体进行了数值模拟,尤其对覆土中有无消能层以及消能层的埋置深度进行了分析,说明消能层的存在确实能够起到加强防护结构抗爆性能的效果;如果把消能层埋置在覆土中偏上的位置,将更有利于发挥消能层的消能作用,增强防护结构的抗爆性能。 对消能层尺寸大小影响的分析表明,采用较大尺寸消能层防护结构的抗爆性能比采用较小尺寸消能层的防护结构的抗爆性能要好。更多还原

【Abstract】 In order to adapt to the requirement of the present war, some military research department has developed a sort of advanced fabricated protective structure, which adopts a new type of composite material that steel plate-steel skeleton-polyurethane foam sandwich plates as its base components, and so the protective structure has some merits such as light weight, high intensity, quickly construction, freeze resistance and heat preservation. But, some problems, such as the characteristic of dynamic load distributing on the protective structures, the deformation rule of the structures in the impact of the blasting load, how to strengthen their performance of resist blasting after the structures are shallow buried, are still in study and exploratory at the present time.Based on the chemical blast site test of fabricated protective structures, the behavior of dynamic load distributing on the upper surface of the protective components and the their corresponding deformation law after blasting load pass through the earth cover are analyzed. Adopting the method that steel plate-steel skeleton-polyurethane foam sandwich plates used as energy-dissipating layers above the underground structures, the thesis analyses the function of the energy-dissipating layers in the earth cover and brings forward the possible approach to how to strengthen their performance of resisting blasting load or the interrelated development direction.To assess correctly the resist blasting performance of the fabricated protective structures and the acting of energy-dissipating layers, the finite element method analyses are used. Especially, setting or not setting of energy-dissipating layers and the cover depth of layers are studied. The research states that the energy-dissipating layer can Teally improve the resist blasting performance of the protective structures.If the energy-dissipating layer is buried in the upper soil cover, the resist blasting performance of the protective structures can be strengthened.The dimension of energy-dissipating layer can affect the resist blasting performance of the fabricated protective structures, and the analysis states that larger dimension of sandwich plates is beneficial to improve the resist blasting performance of the protective structure.更多还原