铁道标准设计2017，Vol.61Issue(5)：86-90,95,6.DOI:10.13238/j.issn.1004-2954.2017.05.019
基于贝叶斯理论的钢管混凝土劲性骨架拱桥收缩徐变效应分析
Analysis of Creep and Shrinkage Effect of CFST Stiffened Skeleton Arch Bridge Based on Improved Bayesian Theory
张正阳 1赵人达1
作者信息
- 1. 西南交通大学土木工程学院桥梁工程系,成都 610031
- 折叠
摘要
Abstract
Concrete-filled steel tube stiffened skeleton arch bridge is characterized by complicated construction procedure and long construction period, which leads to obvious shrinkage and creep of concrete and affects greatly the normal service performance of the bridge and even threatens the safety of the structure.What's more, due to the uncertainty of concrete shrinkage and creep, the stress and displacement of the structure show obvious discreteness, which makes the design and construction of the bridge more difficult and the actual deformation deviating occasionally from the design value.To alleviate such difficulties, Bayesian Method is improved to apply to the condition that the likelihood function distribution is far from the prior distribution.Then, based on this method, the concrete shrinkage and creep effect of the Beipan River Bridge model during the construction period is analyzed and the posterior prediction result is thus produced and verified through measured data.The calculation result shows that the posterior prediction result based on the improved Bayesian Method matches the measured data quite well and the data discretization is much improved compared with the prior predication result.关键词
劲性骨架拱桥/收缩徐变/贝叶斯理论/不确定性/钢管混凝土Key words
Stiffened skeleton arch bridge/Creep and shrinkage/Bayesian theory/Uncertainty/Concrete filled steel tube (CFST)分类
交通工程引用本文复制引用
张正阳,赵人达..基于贝叶斯理论的钢管混凝土劲性骨架拱桥收缩徐变效应分析[J].铁道标准设计,2017,61(5):86-90,95,6.
