摘要
建立预应力混凝土T梁的有限元空间计算模型,考虑徐变作用,计算存梁期T梁上拱度,分析上拱度的主要影响因素,与实际测量结果比较,证明计算方法合理.计算分析表明,混凝土弹性模量和预应力为影响T梁存期上拱度的重要因素,可以通过调整施工参数控制T梁存期上拱度;采用规范方法,计算上拱度结果偏于保守;结果可为相关设计施工提供依据.
Considering the influences of concrete pre-stress loss,creep,shrinkage,elastic modulus and temperature,A FEM analysis model was set up to analyze the camber of reinforced concrete T-beam,in which solid65 element and link8 element were adopted.Compared the calculation results with the measured,the method proposed in the paper was effective with an error no more than 10%.Results showed the crucial influence factors on craber of T-beam are modulus and pre-stress,by modulation of which will contribute to the construction,while the mothod in criteria appeared conservative.The results benefit the related design and construction.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2010年第2期50-54,共5页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
湖南交通科技创新项目(200745)
关键词
预应力混凝土T梁
上拱度
有限元
徐变
弹性模量
预应力
reinforced concrete T-beam
camber
finite element analysis
creep
modulus
pre-stress
