ABSTRACT

Nonlinear finite-element model updating (FEMU) is a promising approach for post-event damage assessment of civil structures. This paper conducted FEMU for a full-scale reinforced concrete bridge column tested under a sequence of earthquakes and examined the evolution of seismic damage across different earthquake ground motions. It was found that using experimental data, FEMU can be applied to identify unknown key model parameters (e.g. bond-slip and core concrete parameters) and damage of the columns as represented by the change of the key parameters. In addition, the updated models demonstrated their ability to better predict the system response for future earthquakes.

摘要

非线性有限元模型更新 (FEMU) 是一种很有前途的土木结构事后损伤评估方法。本文对在一系列地震下测试的全尺寸钢筋混凝土桥柱进行了有限元分析，研究了不同地震地面运动下地震损伤的演变。结果发现，使用实验数据，FEMU 可用于识别未知的关键模型参数（例如粘结滑移和核心混凝土参数）和以关键参数的变化为代表的柱的损坏。此外，更新后的模型展示了它们更好地预测未来地震的系统响应的能力。