摘要
本文对土的动力特性本构模型以及土-结构的接触面模型进行了较详细的探讨,最后分别选用非线性等价粘弹性模型和Ramberg-Osgood模型。分析表明,在进行模型试验设计时,不仅材料要满足相似性原理,而且在设计边界条件和地震波输入时也应以上述模型为参照。通过对一圆形隧道的地震反应分析,表明拱顶处的最大动应力是圆形隧道出现裂痕的主要原因,进而分析了孔隙率对结构横向变形的影响,分析结果与实际工程情况较为吻合。本文的研究成果可为地铁隧道的抗震设计提供一定的参考意见。
Dynamic constitutive model of soils and contact linear equivalent viscoelastic model and Ramber - Osgood model of soil ＆ structure are analyzed in detail, non - model are employed to study the dynamic interaction of soils and subway tunnel. The analysis results also indicate that the materials used in the models should not only satisfy the similarity theory in the model test, but also refer to the above selected models in the design of boundary conditions and earthquake input. The dynamic response of circle tunnel induced by earthquake wave is analyzed, and the results show that the maximum of the dynamic - load stress is located on the keystone, which results in cracks at the top of tunnel. And the influence of porosity on the lateral deformation of structure is also analyzed. The theory analysis of this case study is validated by the fact of this engineering. Thus, the results presented in this paper referes for the earthquake - resistance designing of this subway tunnel.
出处
《工程地质学报》
CSCD
2007年第4期534-538,共5页
Journal of Engineering Geology
基金
国家自然科学基金项目(40272116)
陕西省自然科学基金项目(2005D04).
关键词
动力相互作用
模型试验
土体动力本构模型
地下结构
Dynamic Interaction, Model tests, Dynamic constitutive model of soils, Subway tunnel, Underground structure
