Seismic Performance and Design of Reinforced Soil Structures with Reference to Lessons Learned from the 1999 Earthquakes of Taiwan and Turkey

CMS 0084449标题：“以1999年台湾与土耳其地震为例，探讨加筋土结构之抗震性能与设计”PI：H. I. LingInstitution：哥伦比亚大学摘要：加筋土结构是一种新兴的技术，可以快速和经济地建造挡土墙、边坡和护坡。 许多加筋土结构都是在困难的地形或空间有限的城市地区建造的。 加筋土结构在正常荷载条件下的性能是令人满意的。 在北岭和科比地震中，它们的性能优于传统的重力式和悬臂式挡土墙。然而，在北岭地震期间，加筋土结构离震中有一段距离，因此它们不会受到高地震荷载的影响。 在日本建造的加筋土结构具有刚性饰面，与世界其他地区的加筋土结构不同。 特别是，在美国、土耳其和台湾普遍使用的带有模块块饰面的加筋土结构在日本没有建造。因此，台湾和土耳其的地震提供了一个独特的机会，以检查在美国常见的加筋土结构的性能版本。PI访问了台湾和土耳其的地震灾区，以确定类似于美国专利系统的受损加固土壤结构。 拟议的研究涉及通过与来自台湾和土耳其的研究人员和实践工程师合作调查故障机制。 本研究拟在一年的时间框架内实现以下目标：1.评估台湾及土耳其地震时加筋土结构之表现.获得地震影响区加筋土结构的技术细节，包括墙体配置、筋材布置、土体和筋材性质、地震特性等.评估已确定的加筋土结构的简化抗震分析程序。4.组织一次关于加筋土结构抗震设计问题的国际讲习班。5.根据研究和研讨会的结果，提出改进现行设计程序的建议。最近地震中加筋土结构的失败可能表明现行设计程序是不够的。或者，这可能是设计/施工不当的结果。 因此，拟议的研究将导致显着的技术利益，研究人员和执业工程师在美国和世界各地。

CMS0084449Title: "Seismic Performance and Design of Reinforced Soil Structures with Reference to Lessons Learned from the 1999 Earthquakes of Taiwan and Turkey"PI: H. I. LingInstitution: Columbia UniversityAbstract:Reinforced soil structures are an emerging technology that allows rapid and economic construction of retaining walls, slopes and embankments. Many reinforced soil structures are constructed in difficult terrain or in urban areas where space is limited. The performance of reinforced soil structures under normal loading conditions is known to be satisfactory. During the Northridge and Kobe earthquakes their performance was better than conventional gravity and cantilever retaining walls. However, during the Northridge Earthquake, the reinforced soil structures were at a distance from the epicenter and thus they were not subjected to high seismic loading. Reinforced soil structures constructed in Japan have rigid facing and they are different from those present in other parts of the world. In particular, reinforced soil structures with modular-block facing, commonly used in the United States, Turkey and Taiwan are not constructed in Japan. Therefore, the earthquakes of Taiwan and Turkey provided a unique opportunity to examine the performance of versions of reinforced soil structures commonly found in the United States. The PIs visited the earthquake-affected areas in Taiwan and Turkey to identify damaged reinforced soil structures which are similar to the U.S. proprietary system. The proposed research involves investigating the mechanism of failure through collaboration with researchers and practicing engineers from Taiwan and Turkey. The proposed research aims to achieve the following objectives within the given one-year time framework:1. To assess the performance of reinforced soil structures during the earthquakes of Taiwan and Turkey.2. To obtain the technical details of the reinforced soil structures in the earthquake-affected areas, including wall configuration, reinforcement layout, soil and reinforcement properties, and earthquake characteristics.3. To evaluate simplified seismic analysis procedures for the identified reinforced soil structures. 4. To organize an international workshop on the issues of seismic design of reinforced soil structures. 5. To suggest improvements to current design procedures based on the results of study and workshop.The failure of reinforced soil structures during recent earthquakes may indicate that existing design procedures are inadequate. Alternatively, it might be a result of improper design/construction. Thus, the proposed research will lead to significant technological benefits to researchers and practicing engineers in the United Staes and worldwide.