Seismic Performance of Solid Waste Landfill

1993年10月9日，新的联邦城市固体废物填埋设施最低设计标准（MSWLF）发布，影响了垃圾填埋场的抗震设计。 然而，这些新标准结合了很少的信息，几乎没有建立垃圾填埋场的抗震性能的指导方针。 1994年1月17日，北岭地震在OII垃圾填埋场提供了第一组记录的强加速度，这是美国唯一一个装有强震记录仪的垃圾填埋场，因此提供了一个难得的机会来分析有据可查的案例历史，并制定垃圾填埋场抗震性能的指导方针。 拟议的研究的目的是分析1994年北岭地震后，在OII垃圾填埋场的强烈运动记录和调查位移。 将使用几种类型的动态分析来计算地面加速度和永久地面位移。 具体目标是确定波速和阻尼特性的垃圾填埋场材料，模拟填埋场的反应。 将这些拟合数据与从地球物理和表面波测量技术测量的波速进行比较，以评估波速测量在极不均匀介质中的适用性。 分析方法将包括传统的工程方法（例如QUAD 4等等效线性方法）和更先进的塑性模型和LINOS等有限元模型。 将开发综合模型，包括填埋材料的非线性行为，二维几何形状，以及波的传播和反射。 将提出建议，以最佳的方式来监测垃圾填埋场的地震性能。 本研究期间收集和生成的数据将以数字格式存入南加州大学南加州地震中心的数据库。 ***

9416240 Hushmand On October 9, 1993, new Federal minimum design standards for Municipal Solid waste landfill Facilities (MSWLF) were released which impacted the seismic design of landfills. However, these new standards combined little information and almost no guidelines for establishing the seismic performance of landfills. On January 17, 1994, the Northridge earthquake provided the first recorded set of strong accelerations in the OII landfill, the only landfill in the United States which is instrumented with strong-motion recorders, thus providing a rare opportunity to analyze a well-documented case history, and to develop guidelines for the seismic performance of landfills. The objective of the proposed research is to analyze the strong motion recordings and the surveyed displacements at the OII landfill after the 1994 Northridge earthquake. Several types of dynamic analyses will be used to calculate the ground accelerations, and the permanent ground displacements. The specific objectives are to determine the wave velocity and the damping properties of landfill materials that simulate the landfill response. These backfitted data will be compared to the wave velocities that are measured from geophysical and surface wave measurement techniques, in an effort to assess the applicability of the wave velocity measurements in extremely heterogeneous media. The method of analysis will include conventional engineering methods (e.g. equivalent linear methods such as QUAD4) and more advanced plasticity models and finite element models such as LINOS. Comprehensive models will be developed that include nonlinear behavior of landfill materials, two dimensional geometries, and wave propagation and reflection. Recommendations will be made for the optimal way to monitor the seismic performance of landfills. The data collected and generated during this research will be in digital format to the database of the Southern California Earthquake Center at the University o f Southern California. ***