论文部分内容阅读
冲击波作用于地下结构时,结构构件产生变形,与此同时,结构发生整体沉陷。结构位移和变形与波的相互作用决定了结构顶板上的荷载。计算与试验表明,整体沉陷对顶板上的荷载的影响大于构件变形对它的影响。因此,在研究土壤——结构相互作用时,必须考虑结构的整体沉陷这一因素. 本文中将土壤视为线弹性介质。结构顶板则考虑其弹性与塑性两种工作状态. 在上述条件下,导出了有整体沉陷的浅埋结构顶板在弹性与塑性工作状态时的动力响应的计算公式。并给出了防护工程中常用范围内的计算曲线。
When a shock wave acts on a subterranean structure, the structural member deforms, and at the same time, the structure subsides as a whole. The structural displacement and the interaction of the deformation with the wave determine the load on the structural roof. Calculations and experiments show that the overall subsidence has a greater effect on the load on the roof than the deformation of the member. Therefore, in the study of soil-structure interaction, we must consider the factors of the overall structure of the subsidence. In this paper, the soil is considered as a linear elastic medium. The structural roof is considered in both its elastic and plastic working conditions. Under the above conditions, the dynamic response formula of the shallow-structured roof with the overall subsidence in the elastic and plastic working state is derived. The calculation curve in the commonly used range in the protection engineering is given.