铁道标准设计Issue(10)：1-3,7,4.
梁体温差对桥上无缝线路伸缩附加力的影响研究
Study on the Influence of Beam Temperature Difference on the Additional Expansion and Contraction Forces of CWR on Bridge
摘要
Abstract
Concrete bridges in the natural environment are affected by temperature loads. Temperature load on bridge in codes about CWR of China, Germany and UIC is uniform temperature load. But in the code of China Concrete Structure of Railway Bridge and Culvert code and highway bridges and culverts codes at home and abroad, the temperature load of concrete bridges is imbalanced (temperature gradient load) and is more tallied with the actual situation. It is different with the former. Based on the finite element theory, build the model of box girder with double-block ballastless track. Calculate the influences of different temperature loads and temperature gradient loads on bridge on the additional expansion and contraction forces of CWR on bridge. The results show that with the increase of the temperature load, the additional expansion and contraction forces increase continuously. When apply temperature gradient load, the additional expansion and contraction forces of CWR on bridge is smaller than that when applying uniform temperature load. The temperature load on bridge in temporary provisions is relatively conservative. Propose a further study on the temperature load on bridge and carry out massive experimental researches on the value of temperature load on bridge.关键词
均匀温度荷栽/温度梯度/无缝线路/伸缩附加力Key words
uniform temperature load/ temperature gradient load/ CWR/ the additional expansion and contraction forces分类
交通工程引用本文复制引用
安彦坤,蔡小培,曲村..梁体温差对桥上无缝线路伸缩附加力的影响研究[J].铁道标准设计,2011,(10):1-3,7,4.基金项目
铁道部科技研究开发计划项目(2010G001-D) （2010G001-D）
中央高校基本科研业务费专项资金资助课题(2009JBZ014) （2009JBZ014）
