Finite-Element Based Damage Identification and Tracking of Civil Structures

基于有限元的土木结构损伤识别和跟踪

• 批准号: 0853395
• 负责人: Jann Yang
• 金额: $ 33万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-02-15 至 2014-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0853395&HistoricalAwards=false
• 关键词: Finite; Element; Based; Damage; Identification

The objective of this project is to develop an effective and innovative almost on-line damage detection technique, based on the finite-element formulation and its condensation for large complex structures. Emphasis will be placed on the damage detection of nonlinear civil structures, including nonlinear hysteretic RC frames and base-isolated structures. The research will significantly advance the current state-of-the-technology in structural health monitoring and make practical applications for the local damage detection of complex structures a reality. The developed finite-element based methodology will have the following capabilities being: (1) capable of tracking the local structural damages using only a limited number of acceleration sensors, (2) capable of detecting local damages at element level, and (3) applicable to the health monitoring of complex nonlinear RC structures. In addition to the theoretical/numerical development, experimental tests on small-scale and large-scale linear and nonlinear structures, including large-scale hysteretic RC frames and scaled rubber-bearing isolated building model, will be conducted to verify the proposed damage detection technique.This is a collaborative research among the University of California at Irvine (UCI), the Nangjing University of Aeronautics and Astronautics (NUAA), and the National Center for Research on Earthquake Engineering (NCREE), Taiwan.

本项目的目标是开发一种有效的、创新的、基于大型复杂结构有限元模型及其凝聚的几乎在线损伤检测技术。重点是非线性土木结构的损伤识别，包括非线性滞回钢筋混凝土框架和基础隔震结构。该研究将极大地推动当前结构健康监测技术的发展，使复杂结构局部损伤检测的实际应用成为现实。所开发的基于有限元的方法将具有以下能力：(1)仅使用有限数量的加速度传感器来跟踪局部结构损伤；(2)能够在单元级别上检测局部损伤；(3)适用于复杂的非线性RC结构的健康监测。除了理论和数值方面的发展，还将对小型和大型线性和非线性结构进行试验测试，包括大型滞回钢筋混凝土框架和比例橡胶支座隔震建筑模型，以验证所提出的损伤检测技术。这是由加州大学欧文分校(UCI)、南京航空航天大学(NUAA)和台湾国家地震工程研究中心(NCREE)共同开展的研究。