Seismic Design of Geosynthetic-Reinforced Soil Slopes

9320087霍尔茨本项目是对土工合成材料加筋土坡的地震稳定性进行的分析和试验研究。其目的是：(1)增加对土工合成加筋土坡的基本抗震性能的了解，以及(2)为这类结构的抗震设计发展现实的分析模型。采用非线性动力有限元分析方法，分析了材料特性、几何特性、荷载特性以及地面运动参数对陡坡(大于2：1)土工合成加筋边坡性能的影响。利用动态土工离心机和大型振动台建立加筋土坡模型，并在模拟地震荷载条件下进行试验，以了解地震作用下加筋土坡的破坏机制和临界工程性质。对现有的静力稳定分析和设计方法进行适当修改，合理处理地震荷载，使加筋土工合成材料边坡的设计更具信心和经济性。这项研究对地震活动地区住宅和商业用地的开发具有重要意义。***

9320087 Holtz This project is an analytical and experimental investigation of the seismic stability of geosynthetically-reinforced earth slopes. The objectives are to: (1) increase the understanding of the fundamental seismic behavior of geosynthetically-reinforced earth slopes, and (2) develop realistic analytical models for the seismic design of such structures. Nonlinear dynamic finite element analyses are used to evaluate the influence of material, geometric, and loading characteristics, as well as ground motion parameters, on the performance of steep (defined as greater that 2:1) geosynthetically-reinforced slopes. Models of reinforced slopes will be built and tested under simulated seismic loading conditions using a dynamic geotechnical centrifuge and a large shaking table, in order to understand governing failure mechanisms and critical engineering properties operative during earthquake ground shaking. Existing analysis and design methods for static stability will be appropriately modified to treat seismic loading in a rational way, so that geosynthetic-reinforced slopes can be designed with increased confidence and economy. This research has important implications for residential and commercial land development in seismically-active regions. ***