温度升高20～50℃对混凝土弹性模量的影响探究

发布时间：2018-01-15 04:35

  本文关键词：温度升高20～50℃对混凝土弹性模量的影响探究　出处：《硅酸盐通报》2016年12期 　论文类型：期刊论文

  更多相关文章： 混凝土结构 弹性模量 温度变化 试验测定

【摘要】：弹性模量是混凝土的重要力学指标,是混凝土结构计算分析中的关键参数,不同温度下混凝土弹性模量如何变化一直是人们比较关心的问题。本文采用一种加热保温装置,给混凝土试件施加均匀温度场,在不同温度下给试件施加压力;用压力传感器测量试件承受压力,应变计测量试件变形,根据不同温度下的应力和应变计算了试件的弹性模量,分析了不同温度下混凝土弹性模量的变化规律。试验结果表明,常温下当温度升高为20~50℃时,混凝土弹性模量随温度变化不明显,可以近似按常数处理。
[Abstract]:Elastic modulus is an important mechanical index of concrete and a key parameter in the calculation and analysis of concrete structure. How to change the modulus of elasticity of concrete at different temperatures is always an issue of concern. In this paper, a kind of heating and heat preservation device is used to apply uniform temperature field to the concrete specimen, and to apply pressure to the specimen at different temperature. The elastic modulus of the specimen was calculated according to the stress and strain at different temperature by using pressure sensor to measure the specimen under pressure and the strain gauge to measure the deformation of the specimen. The variation of elastic modulus of concrete at different temperatures is analyzed. The experimental results show that when the temperature rises to 20 ~ 50 鈩，

本文编号：1426837