BRIGE: Reliability Assessment of Real-Time Hybrid Simulation Results for Performance Evaluation of Structures under Earthquakes

BRIGE：地震下结构性能评估的实时混合仿真结果的可靠性评估

• 批准号: 1227962
• 负责人: Cheng Chen
• 金额: $ 17.18万
• 依托单位: San Francisco State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1227962&HistoricalAwards=false
• 关键词: BRIGE; Reliability; Assessment; Real; Time

This Broadening Participation Research Initiation Grant (BRIDGE) project develops a novel approach to assessing the reliability of experimental results using the real-time hybrid simulation technique for replicating actual structural responses during earthquakes. Real-time hybrid simulation is widely viewed as the most advanced tool for investigating the rate-dependent behaviors of structures. However, its application has been severely limited by the servo-hydraulic actuator delay induced tracking errors which accumulate and propagate in laboratory to study the behavior of large-scale structures under earthquakes. Building on previous research into the cumulative effect of actuator delay, this project will determine the effects of structural nonlinearity, substructure partitions, and variations in ground motion inputs and intensities. Data will be analyzed using numerical simulation of delay differential equations and correlation analysis between actuator delay and simulation accuracy. The project will result in the development of a probability-based energy error and tracking indicator which will enable the engineering community to assess the reliability of experimental results and to validate these results, especially when the actual structural responses under earthquakes are not available for an immediate comparison. The research will fill a significant knowledge gap in the earthquake engineering community by resolving a problem that currently limits the application of real-time hybrid simulation technique. It will lead to an efficient and effective assessment tool that will enable the real-time hybrid simulation technique to be applied in the laboratory to its full potential. The project will help to build international collaborations and enhance the research infrastructure at the School of Engineering at San Francisco State University, one of the nation?s most ethnically and culturally diverse universities. It will be integrated with the servo-hydraulic equipment acquired through a recent NSF-MRI grant at SFSU and will engage undergraduate and graduate researchers in current aspects of earthquake engineering research. The project will also reach out to students from Cañada College, a premier Hispanic-serving institution, to extend the impact of existing NASA CiPair and DoE CalSTEP programs and provide these students with unparalleled opportunities in earthquake engineering research.

这个扩大参与研究启动补助金（BRIDGE）项目开发了一种新的方法来评估实验结果的可靠性，使用实时混合模拟技术复制地震期间的实际结构响应。实时混合仿真被广泛认为是研究结构率相关行为的最先进的工具。然而，它的应用已严重限制了伺服液压致动器的延迟引起的跟踪误差，积累和传播在实验室中，以研究在地震下的大型结构的行为。基于以前对致动器延迟累积效应的研究，本项目将确定结构非线性、子结构分区以及地面运动输入和强度变化的影响。数据将使用延迟微分方程的数值模拟和致动器延迟和模拟精度之间的相关性分析进行分析。该项目将导致开发一个基于概率的能量误差和跟踪指标，这将使工程界能够评估实验结果的可靠性，并验证这些结果，特别是当地震下的实际结构反应无法立即进行比较时。这项研究将填补一个显着的知识空白，在地震工程界解决的问题，目前限制了应用的实时混合模拟技术。它将导致一个高效和有效的评估工具，将使实时混合模拟技术在实验室中应用，以充分发挥其潜力。该项目将有助于建立国际合作，并加强在工程学院在旧金山弗朗西斯科州立大学，全国之一的研究基础设施？美国是种族和文化最多样化的大学。它将与通过SFSU最近的NSF-MRI赠款获得的伺服液压设备集成，并将使本科生和研究生研究人员参与地震工程研究的当前方面。该项目还将接触到来自西班牙裔服务机构Cañada学院的学生，以扩大现有NASA CiPair和DoE CalSTEP计划的影响，并为这些学生提供地震工程研究方面无与伦比的机会。