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

该奖项是国家科学基金会07-506计划征求“乔治E。小布朗地震工程模拟研究网络（NEES）竞赛。 该项目的目标是开发一个地震影响评估框架，该框架将混合模拟与自由场和结构传感器测量、基于系统识别的模型更新技术、概率脆弱性分析和现有地震损失评估软件相结合。 地震影响评估是地震灾后应急响应和恢复规划的基础。 地震影响评估框架的试点实施将使用仪表化的Bill E。爱默生纪念桥位于密苏里州的吉拉多角。算法将被开发或调整和通信协议制定链接传感器测量直接进入混合系统。自由场测量将用于描述现场的危险并定义强运动记录，结构传感器用于调整桥梁基础土壤模型。将使用模型和输入运动进行混合模拟，同时改变一个或多个（最多三个）支撑墩的设计。桥梁的反应，与地面运动和桥墩反应的变化，将被用来推导脆弱性关系，与危险，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件的相对成熟的子学科进行综合测试，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设备现场的五分之一比例加载和边界条件箱，并通过由密苏里州交通部、联邦应急管理局、联邦公路管理局、以及总部设在伊利诺伊大学厄巴纳-香槟分校的中美洲地震中心。该项目将为地震学家提供刺激，岩土和结构地震工程师以及结构控制和影响评估专家，以改进当前的算法，从而对地震减灾、响应和恢复规划所依据的损失进行更可靠的评估。 该框架和图形用户界面的源代码将存档在NEESforge（可在http://www.nees.org上获得的NEES软件库）中，并将包括吉拉多角大桥的示例应用程序。 此外，该项目的数据将通过NEES数据储存库（http：//www.example.com）公开提供。www.nees.org

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).