复合防护结构的动力响应及破坏规律研究

采用中间含吸能层的复合防护结构，其抗爆防护能力可大幅度提高，但目前对该种复合结构在爆炸作用下动力响应及破坏规律的研究较少。利用ANSYS／LS—DYNA对复合防护结构在爆炸载荷作用下的动力响应和破坏规律进行了数值计算．结果表明：外拱结构的破坏基本上属于冲切破坏，而内拱结构基本上属于拱的压弯破坏；复合结构的破坏是以牺牲外拱和泡沫混凝土为代价来保护整体防护结构；与常规防护结构相比，复合防护结构的抗爆能力明显加强．

Research on Dynamic Response and Failure Law of Composite Protective Structure

The anti-blasting ability of the protective structure can be greatly enhanced by adopting composite structure with endergonic stratum in it, but the dynamic response and failure law of this composite structure was rarely researched. The anti-blasting dynamic response and failure law of the composite protective structure under blasting was researched by numerical simulation with ANSYS/LS-DYNA. The results show that the failure of exterior ach structure represents a punching failure, and the inner arch structure represents a press-bend failure. The composite protective structure is worked by sacrificing the exterior ach and foam concrete to protect the whole structure. The anti-blasting ability of the composite protective structure is greatly enhanced compared with normal protective structure.