Damage Assessment of Transportation System for the Northridge, CA Earthquake

9416420 1994年1月17日北岭地震为研究交通系统的破坏和震后性能提供了一个宝贵的机会。这个项目的目标是：(A)通过将地震前规划的最佳路线与地震后的交通模式进行比较，评估震前规划的最佳路线的有效性；(B)评估使用基于地理信息系统的方法估计交通系统损坏和损失的有效性；(C)根据交通网络组成部分损坏造成的时间延误估计用户的预期旅行费用；(D)评估基于地理信息系统的资源分配的有效性，从而评估交通网络和用于应急的关键设施的相互作用；(E)确定过去二十年减缓活动的总体有效性。项目组已经获得了该地区系统的完整清单和部分损坏数据。数据收集完成后，将进行一系列网络分析和模拟，充分利用地理信息系统和关系数据库技术，以得出关于紧急情况下路线的可用性、未来可能发生地震事件时交通拥堵造成的时间延误和旅行成本的结论。将研究调动现有资源的最佳战略和确定需要在紧急情况下进行资源分配的关键结构的方法。预计研究结果将有助于在灾后规划和应急管理领域减轻地震灾害。对现有工具和方法的有效性的评估将对未来缓解政策的制定、确定交通管理的关键结构、翻新的决策过程以及更好的防震管理的发展产生重大影响。对1971年和1994年地震的结构破坏和灾后性能数据的仔细收集、组织以及空间和表格存储将为当前和未来研究地震对交通系统的影响提供宝贵的信息来源。这是一个北岭地震项目。***

9416420 Kiremudjian January 17, 1994 Northridge earthquake provides an invaluable opportunity to study the damage and post- earthquake performance of transportation systems. The objectives of this project are to: (a) evaluate the effectiveness of pre-event planned optimal routes by comparing them to traffic patterns after an earthquake; (b) evaluate the effectiveness of a GIS-based methodologies for the estimation of damage and loss to transportation systems; (c) estimate the expected travel costs to the users based on time delays due to damage of transportation network components; (d) evaluate the effectiveness of GIS-based resource allocation, hence the interaction of the transportation network and the critical facilities for emergency responses; (e) determine the general effectiveness of mitigation activities over the past two decades. A complete inventory of the system in the region and partial damage data are already available to the project team. Upon completion of data collection, a series of network analyses and simulations, taking full advantage of geographic information system and relational database technologies, will be conducted to draw conclusions on the availability of routes in emergency situations, time delays and travel costs due to traffic congestion in a possible future earthquake event. Optimal strategies for the movement of available resources and methodologies for identifying critical structures that need to operate in an emergency situation for resource allocation will be studied. It is anticipated that the results of the research will contribute to seismic hazard mitigation in the areas of post disaster planning and emergency management. the assessment of the effectiveness of the available tools and methodologies will have a significant impact towards the development of future mitigation policies, in the identification of critical structures for traffic management, in the decision making process for retrofitting, and in the development of better earthquake preparedness management. The careful collection, organization, and spatial and tabular storage of structural damage and post disaster performance data from the 1971 and 1994 earthquakes will provide an invaluable source of information for current and future studies of the effects of earthquakes on transportation systems. This is a Northridge earthquake project. ***