【作者】 吴勇；

【导师】 吴文经；

【作者基本信息】 北京工业大学 ， 结构工程， 2003， 硕士

【摘要】 随着国民经济的发展，许多大型基础性设施建设，如水电、路桥、建筑等能源、交通方面的建设工程，其中很多拟建和在建工程的规模和难度都是空前的，这些大型工程的建设往往由于软弱层带的存在而产生严重的工程问题，甚至直接关系到这些大型工程的成败。因此，研究软弱层带的动力特性及其在工程中的应用不仅具有理论价值，而且具有重要的工程意义。首先，本文主要研究了软弱层带对正弦剪切波传播的影响,对于厚度较小的夹层以交界面模拟软弱层带，主要讨论粘聚力和内摩擦角两个参数对波传播的影响；对于厚度较大的夹层，主要研究夹层厚度、粘聚力、摩擦角、弹性模量和泊松比五个参数对波传播的影响，并对所有的组合情况进行了数值模拟和分析，得到了一些有用的结论。其次，本文以某个具有破碎带软弱层的岩质边坡实际工程为例进行了数值模拟，详细分析了边坡在自重应力下静力稳定性和地震波作用下的动力稳定性，认为在地震动力作用下的位移远远大于自重应力下的静力位移，自重应力下稳定的边坡变得不稳定了，地震对边坡的稳定性有显著影响。最后，本论文对研究成果进行了总结，并对下一步的研究进行了展望更多还原

【Abstract】 With the development of the national economy, a great number of being constructed and planned projects such as hydroelectric power stations, highways and buildings, which involve energy, transportation and other industries, are quiet large and complex in the world. These projects often encounter huge difficulty and are even caused to fail due to the existence of weak interlayer. So the study of the dynamic property of weak interlayer and its application in rock slope engineering not only has theoretical value, but also possesses real significance.Firstly, the effects of weak interlayer on the propagation of an incident sine shear wave are studied in this thesis. To the weak interlayer whose thickness is smaller, it is simulated by an interface and the problem mainly concerns the effects of two factors (cohesion and friction angle); To the weak interlayer whose thickness is greater, it is simulated by the real thickness of the weak interlayer and two interfaces on each side of it, and the study focuses on five factors of the weak interlayer: the thickness, cohesion, friction angle, elastic modulus and Poisson’s ratio of weak interlayer. Then, all combinations are numerically simulated and analyzed, and some valuable conclusions are drawn. Secondly, a rock slope project with weak interlayer is taken as an example and numerically simulated. Its stability under gravity and especially seismic wave is studied and analyzed. It is found that the displacement of the slope under the earthquake is far greater than that under gravity and that the earthquake has remarkable effects on the slope project. Finally, the achievements of this paper are summarized and some aspects for further research are recommended更多还原