The Ground Deformations and Failures in the Van Norman Complex

9416366罗斯1971年圣费尔南多地震后23年，1994年加利福尼亚州北岭地震对洛杉矶水电部（LADWP）的货车诺曼综合体的土木结构、水管系统和电气设备造成了重大破坏;特别是下圣费尔南多大坝和上圣费尔南多大坝、尾水渠和洛杉矶水库。 在四个LADWP地球结构上测量了地面变形，在LADWP复杂的内部和周围有17个强震记录。 这个仪器齐全的网站提供了一个特殊的机会，研究永久变形和故障和地震后的稳定性，可液化土壤和地球结构受到严重（0.98 g）的地面震动。 该项目涉及三个机构：南加州大学（第一部分），达姆斯摩尔（第二部分），凯斯西储大学（第三部分）。 目的是分析1994年北岭地震后货车诺曼综合体的地面变形和破坏;从研究和工程实践的角度，基于最先进的现场和实验室测量。 三个研究小组的协调工作由南加州大学提供。 第一部分（南加州大学）和第二部分（Dames摩尔）的目的是比较1971年与1994年的地面运动观测，并调查非线性动力有限元分析的有效性，在有据可查的实地研究。 第三部分（凯斯西储大学）的目的是在货车诺曼综合体的多个现场（可进行现场观察和测量），采用单位能量法确定土壤的特性并确定其液化潜力。 结果将被组装在一个数据库，并提供给工程界，除了被用于本项目的第一和第二部分。 预计本项目将有助于执业工程师和监管机构评估土壤和土结构地震反应可用模型的能力和局限性。 这一行动是为了支持第二部分（女摩尔）的这一合作研究项目。 ***

9416366 Roth Twenty-three years after the 1971 San Fernando Earthquake, the 1994 Northridge, CA, Earthquake caused substantial damage to earth structures, water conduit systems, and electrical equipment of the Van Norman complex of the Los Angeles Department of Water and Power (LADWP); specifically the Lower and Upper San Fernando Dams, the Tailrace, and the Los Angeles Reservoir. Ground deformations were measured on four LADWP earth structures, and there were seventeen strong-motion recordings inside and around the LADWP complex. This well-instrumented site provides a special opportunity to study the permanent deformations and failure and the post-earthquake stability of liquefiable soils and earth structures subjected to severe (0.98 g) ground shaking. This project involves three institutions: the University of Southern California (Part I), Dames & Moore (Part II), and Case Western Reserve University (Part III). The objective is to analyze the ground deformations and failures in the Van Norman complex following the 1994 Northridge Earthquake; from both research and engineering-practice points of view, based on state- of-the-art field and laboratory measurements. Coordination of the three research teams is provided by the University of Southern California. The objective of Part I (University of Southern California) and Part II (Dames & Moore) is to compare the 1971 with the 1994 observations of ground motions, and to investigate the validity of nonlinear dynamic finite element analyses in well-documented field studies. The objective of Part III (Case Western Reserve University ) is to characterize the soil and to establish its liquefaction potential, using the unit energy method, at a number of sites in the Van Norman complex where field observations and measurements are available. The results will be assembled in a data base and made available to the engineering community, in addition to being used in Parts I & II of this project. It is expected th at this project will assist practicing engineers and regulatory agencies to evaluate the capabilities and limitations of available models for the seismic response of soils and earth structures. This action is to support Part II (Dames & Moore) of this collaborative research project. ***