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.

基于实测中心钢筋混凝土棱柱体干燥时的钢筋应变和实测伴生棱柱体无约束时的干燥收缩应变，研究了一种求取W/C=0.5混凝土拉伸徐变系数的方法，其中名义配筋率为6 个级别，从 0.1% 到 2.4%。结果，获得了不同加载年龄下的增量蠕变系数，但是，没有显示蠕变系数值对加载年龄的依赖性。与此相关，通过测量预应力筋的应变和无预应力筋的配套试件的收缩应变，建立了一种评估预应力混凝土梁中混凝土徐变系数的方法，并验证了该方法的有效性。

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