沪杭客专32m箱梁徐变试验相似模型设计方法研究

Study on design method of similar model in 32m-span box girder creep experiment of Shanghai-Hangzhou passenger dedicated line

相似关系设计是模型试验的关键环节。以沪杭客专32 m跨度的简支箱梁为原型,探讨了适合于徐变试验的模型的设计方法,建立了模型和原型的相似关系,设计了简单相似模型梁结构,推导出模型梁与原型梁的弹性上拱和徐变上拱的相似关系。通过对比分析原型梁的弹性上拱推算值、徐变上拱推算值与实测值,验证了相似模型的合理性。

Similarity relationship design is the key link of the model test.Based on the 32m-span box girder of Shanghai-Hangzhou passenger line archetype,this paper discussed model design method for the creep test and established a similarity relationship between model and prototype.Later,a simple similar model structure was designed and the similar relation of elastic camber and creep camber between model and prototype were deduced.By contrastive analysis of the measured value and the deduced value of the elastic camber and creep camber,the rationality of the similar model was verified.