铁道科学与工程学报2016，Vol.13Issue(7)：1303-1308,6.
基于动态贝叶斯模型的大悬臂展翅宽箱梁桥性能预测评估
Performance prediction assess ment of wing-box-girder bridge with large-cantilever-wing base on dyn mic bayesian model
摘要
Abstract
Aiming at the wing-box-girder bridge with large-cantilever-wing,this paper presented the establish-ment of the dynamic Bayesian model for structure performance prediction by setting the maximum transverse stress of the roots of cantilever as the target layer and the live load ratio,the maximum negative temperature gra-dient,shrinkage strain as the sub-structure layer based on Dynamic Bayesian Network theory.The maximum transverse stresses of the roots of the cantilever at different times were obtained by use of ANSYS model.Through parametric studying,the model parameters were obtained.Then taking advantage of backward and forward rea-soning algorithm,transverse stress-time curve before updating was obtained.The accuracy of the model was veri-fied by comparing probability density distributions and the fitting curves of shrinkage,live load ratio,and nega-tive temperature gradient.Finally,how to combine the measured data and dynamic Bayesian model to update per-formance prediction of the structure was explained.关键词
动态/贝叶斯/性能评估/展翅箱梁Key words
dynamic/Bayesian/performance prediction/wing-box-girder分类
交通工程引用本文复制引用
贾布裕,由瑞凯,余晓琳,杨铮,颜全胜..基于动态贝叶斯模型的大悬臂展翅宽箱梁桥性能预测评估[J].铁道科学与工程学报,2016,13(7):1303-1308,6.基金项目
国家自然科学基金资助项目（51208208）；中央高校基本科研业务费专项资金资助项目（2014ZZ0019）；广东省交通运输厅科技资助项目 （）
