DEVELOPMENT OF A PRACTICAL TENSILE CREEP MODEL BASED ON SIMPLE EXPERIMENTS

基于简单实验的实用拉伸蠕变模型的开发

• 批准号: 24656272
• 负责人: SATO Ryoichi
• 金额: $ 1.5万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656272/
• 关键词: 鉄筋ひずみ; 収縮ひずみ; 応力損失; クリープ係数; 収縮; 鉄筋拘束ひずみ; 線形クリープ則; 増分クリープ係数

A method to obtain tensile creep coefficient of concrete with W/C=0.5 was investigated, based on measured reinforcement strains in centrically reinforced concrete prisms due to drying and measured drying shrinkage strains in the companion prisms without restraint, in which nominal reinforcement ratios were in 6 levels from 0.1% to 2.4%. As a result, incremental creep coefficients at different loaded ages were obtained andhowever, the dependence of values of creep coefficient on loading age was not shown. Related to this, a method to evaluate creep coefficients of concrete in a prestressed concrete beam was developed by measuring stains in prestressing tendons and shrinkage strain of the companion specimen without prestressing tendons and the method was verified to be valid.

基于通过干燥和无限制的伴侣的干燥收缩率菌株在中心加固的混凝土棱镜中测得的增强型混凝土菌株，研究了一种具有W/C = 0.5的混凝土的拉伸蠕变系数，该方法在不受限制的同伴中，在6个水平上，从0.1％到2.4％。结果，获得了不同载荷年龄的增量蠕变系数，并且换句话说，未显示蠕变系数值对加载年龄的依赖性。与此相关的是，通过测量未经预应力肌腱的伴随标本的预应力肌腱和收缩株中的污渍来开发一种评估预应力混凝土束中混凝土蠕变系数的方法。

项目成果

PC 鋼材のひずみ測定に基づくクリープ係数評価方法

基于应变测量的PC钢材料蠕变系数评估方法

• 发表时间: 2013
• 作者: 小川由布子;亀田昭一;佐藤良一;上谷康晴
• 通讯作者: 上谷康晴

PC鋼材のひずみ測定に基づくクリープ係数評価方法

基于应变测量的PC钢材料蠕变系数评估方法

• 发表时间: 2013
• 作者: 小川由布子;亀田昭一;佐藤良一;上谷康晴;小川由布子
• 通讯作者: 小川由布子