NEESR-SD: Framework for Development of Hybrid Simulation in an Earthquake Impact Assessment Context

该奖项是美国国家科学基金会07-506项目征集“小乔治·E·布朗地震工程模拟网络(NEES)研究”竞赛的结果。该项目的目标是开发一个地震影响评估框架，该框架集成了自由场和结构传感器测量的混合模拟、基于系统识别的模型更新技术、概率易损性分析和现有的地震损失评估软件。地震影响评估是震后应急响应和灾后恢复规划的基础。将利用位于密苏里州吉拉多角的仪表式比尔·E·爱默生纪念桥进行地震影响评估框架的试点实施。将开发或调整算法，并制定通信协议，将传感器测量直接连接到混合系统。自由场测量将被用来描述现场的危险并定义强震记录，以及用于调整桥梁-基础-土壤模型的结构传感器。将使用模型和输入运动进行混合模拟，同时更改一个或多个(最多三个)支承桥墩的设计。桥梁的反应，随着地面运动和桥墩反应的变化，将被用来推导易损性关系，这将被用来估计地震影响。通过这种方式，将对负责开发上述组成部分的相对成熟的分学科进行综合测试，以评估和减轻地震损失。该项目将利用伊利诺伊大学厄巴纳-香槟分校NEES设备现场五分之一的比例加载和边界条件箱，并通过密苏里州交通部、联邦紧急事务管理局、联邦公路管理局和总部位于伊利诺伊大学厄巴纳-香槟的中美洲地震中心资助的其他项目利用大量资源。该项目将刺激地震学家、岩土和结构地震工程师、结构控制和影响评估专家改进现有算法，以产生更可靠的损失评估，作为地震缓解、响应和恢复规划的基础。该框架和图形用户界面的源代码将保存在NEESforge(可从http://www.nees.org)获得的NEES软件储存库)中，其中将包括吉拉多角桥的一个范例应用程序。此外，该项目的数据将通过国家经济研究中心数据库(http://www.nees.org).)公开提供

This award is an outcome of the National Science Foundation 07-506 program solicitation "George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Research" competition. The objective of this project is to develop an earthquake impact assessment framework that integrates hybrid simulation with free-field and structure sensor measurements, system identification-based model updating technology, probabilistic fragility analysis, and existing earthquake loss assessment software. Earthquake impact assessment is the basis for post-earthquake emergency response and recovery planning. A pilot implementation of the earthquake impact assessment framework will be conducted using the instrumented Bill E. Emerson Memorial Bridge located in Cape Girardeau, Missouri. Algorithms will be developed or adapted and communication protocols formulated to link sensor measurements directly into the hybrid system. Free field measurements will be used to characterize the hazard at the site and define strong motion records, and the structural sensors used to tune the bridge-foundation-soil model. Hybrid simulations will be undertaken using the model and input motion, while changing the design of one or more (up to three) of the supporting piers. The response of the bridge, with variation of the ground motion and pier response, will be used to derive fragility relationships which, with the hazard, will be used to estimate earthquake impact. In this manner, the relatively mature subdisciplines responsible for developing the above components will be tested in an integrated manner to assess and mitigate earthquake losses. This project will utilize the one-fifth scale loading and boundary condition boxes at the NEES equipment site at the University of Illinois at Urbana-Champaign, and leverage significant resources through other projects funded by the Missouri Department of Transportation, Federal Emergency Management Agency, Federal Highway Administration, and Mid-America Earthquake Center headquartered at the University of Illinois at Urbana-Champaign.This project will provide a stimulus to seismologists, geotechnical and structural earthquake engineers, and structural control and impact assessment experts to improve current algorithms to produce more reliable assessment of losses that underpin seismic mitigation, response, and recovery planning. The source code for the framework and the graphical user interface will be archived in NEESforge (the NEES software repository available at http://www.nees.org) and will include an example application to the Cape Girardeau Bridge. In addition, data from this project will be made publicly available through the NEES data repository (http://www.nees.org).