湖南大学学报（自然科学版）2017，Vol.44Issue(5)：10-19,10.DOI:10.16339/j.cnki.hdxbzkb.2017.05.002
大跨度拱桥静动力试验与结构识别的实践
Practice of Static and Dynamic Experiments and Structural Identification of Long-span Arch Bridges
摘要
Abstract
Various uncertainties of the FE modeling may have significant impact on structural identification and result in obvious discrepancy between FE model analysis and field test results.In order to eliminate epistemic uncertainty and aleatory uncertainty during model calibration procedure, which contributes to achieve reliable condition assessment and response prediction, two long-span bridges were taken for examples, and several critical issues were discussed.By means of field inspection and blueprint review, simultaneously combined with the precise modeling, uncertain parameter selection was carried out based on sensitivity analysis, and parameter optimization was eventually performed by the least square method to complete the working condition assessment and response prediction.Research in this paper consists of in-situ experiments, precise finite element modeling, model calibration, and model admissibility check.Discrepancies between FE model and field test results can be mitigated by efficient model calibration method, and initial design model generally shows 20% and 23% relative difference.关键词
模型校验/大跨度拱桥/静动力试验/工作模态分析/结构识别Key words
model checking/long-span bridge/static and dynamic test/operational modal analysis/structural identification分类
交通工程引用本文复制引用
周云,张军凯,陈松柏,易伟建..大跨度拱桥静动力试验与结构识别的实践[J].湖南大学学报（自然科学版）,2017,44(5):10-19,10.基金项目
国家重点研发计划专项资助项目(2016YFC0701400,2016YFE0127900),National Key Research and Development Program of China(2016YFC0701400,2016YFE0127900) （2016YFC0701400,2016YFE0127900）
国家自然科学基金青年基金资助项目(51208190),National Natural Science Foundation of China(51208190) （51208190）
