Finite-Element Based Damage Identification and Tracking of Civil Structures

该项目的目标是开发一种有效的和创新的几乎在线的损伤检测技术，基于有限元公式和它的大型复杂结构的缩合。重点将放在非线性土木结构的损伤检测，包括非线性滞后钢筋混凝土框架和基础隔震结构。该研究将极大地推进当前结构健康监测技术的发展，并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）能够跟踪局部结构损伤，仅使用有限数量的加速度传感器，（2）能够检测局部损伤在单元级，和（3）适用于复杂的非线性RC结构的健康监测。除了理论/数值开发之外，还将进行小尺度和大尺度线性和非线性结构的实验测试，包括大尺度滞回RC框架和缩尺橡胶支座隔震建筑模型，以验证所提出的损伤检测技术。这是加州大学欧文分校（UCI）、南京航空航天大学（NUAA）、国家地震工程研究中心（NCREE）。

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.