Continuation of Parkfield, CA Pipeline Project

加利福尼亚州帕克菲尔德管道项目的延续

• 批准号: 9810066
• 负责人: Jeremy Isenberg
• 金额: $ 11.12万
• 依托单位: Weidlinger Associates Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9810066&HistoricalAwards=false
• 关键词: Continuation; Parkfield; CA; Pipeline; Project

The performance of buried pipelines when subjected to earthquake effects -including traveling waves, fault offsets and lateral spreading associated with soil liquefaction and slope failures - has received considerableattention. Field and laboratory observations have led to the formulation of mathematical models of underground pipeline performance that can be used as a basis for design and retrofit of individual pipeline segments, and in damage modules for network simulations. Collection of physical data on pipeline performance from recent earthquakes has illuminated the roles of soil stability, surface rupture and pipeline material and condition. Modeling efforts have similarly advanced. However, there is lacking specific data on how ground movement is translated into pipeline deformation. Laboratory scale testing has not been productive due to thedifficulties of simulating boundary conditions, realistic soil deformation and realistic pipeline surface conditions. The purpose of the Parkfield pipeline experiment is to obtain data at field scale under actualearthquake conditions.The reason for siting the experiment at Parkfield was to capitalize on the predicted recurrence of a M6 or larger earthquake. The USGS has extensively studied and instrumented the region, thereby enriching the data that will be collected.The validity of the pipeline experiment was demonstrated in the 1989 Loma Prieta Earthquake. In the ensuing years, it became necessary to stabilize the instrumentation and data acquisition systems with equipment upgrades or replacements. Accordingly, this action is for upgrades to the instrumentation and data acquisition and recording equipment, including replacing the strain gages on the steel pipes, upgrading the seismographsand performing other tasks needed to maintain the experiment in a state of readiness.This project will provide critical data for calibrating design and analysis methods that will eliminate unnecessary conservatism or risk of failure for individual pipelines, and will also validate modules needed insystem-level and regional risk assessment and loss mitigation studies for pipeline networks.

埋地管道在地震作用下的性能--包括行波、断层偏移和与土壤液化和边坡破坏有关的横向扩展--已经引起了广泛的关注。现场和实验室的观察，导致地下管道性能的数学模型的制定，可用作基础的设计和改造的个别管道段，并在网络模拟损坏模块。从最近地震中收集的有关管道性能的物理数据阐明了土壤稳定性、表面破裂以及管道材料和条件的作用。 建模工作也取得了类似的进展。然而，缺乏关于地面运动如何转化为管道变形的具体数据。由于难以模拟边界条件、真实的土壤变形和真实的管道表面条件，实验室规模的试验一直没有成效。帕克菲尔德管道实验的目的是在实际地震条件下获得现场规模的数据。将实验地点设在帕克菲尔德的原因是为了利用预测的6级或更大地震的复发。美国地质勘探局对该地区进行了广泛的研究和测量，从而丰富了将要收集的数据。1989年洛马普列塔地震证明了管道实验的有效性。在随后的几年里，有必要通过设备升级或更换来稳定仪器和数据采集系统。因此，这一行动是为了升级仪器和数据采集及记录设备，包括更换钢管上的应变计，升级地震仪，并执行保持试验处于准备状态所需的其他任务，这一项目将提供校准设计和分析方法的关键数据，以消除不必要的保守或个别管道的故障风险，还将验证系统一级和区域风险评估以及管道网络损失减轻研究所需的模块。