Durability Estimation of High Performance Concrete Structures

高性能混凝土结构的耐久性评估

• 批准号: 04402038
• 负责人: OKAMURA Hajime
• 金额: $ 18.88万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04402038/
• 关键词: High Performance Concrete; Durability; Crack; Drying Shrinkage; Heat Generation; 乾燥収縮ひびわれ; 温度ひびわれ; 水分移動; 細孔構造; ひびわれ危険度

The purpose of this study was to develop the rational prediction method of the durability of the structures made of High Performance Concrete. Following results were obtained through this research.Micromechanical model for both water transport in concrete and associated volumetric change of concrete was made and improved. Simple constitutive law and cracking criteria of concrete under restrained shrinkage was obtained from experiment. Coupling these material models, FEM computer program was developed which can predict drying shrinkage cracking in concrete structures.Heat generation model of cement based on the mineral component was developed. Strength development model was also formulated on the basis of the unified concept. These were improved so that it can be applied to cement, blast furnace slag and fly-ash concrete. Design method for thermal crack resistance of High Performance Concrete was proposed.

本研究的目的是开发高性能混凝土结构耐久性的合理预测方法。通过本研究取得了以下成果。建立并改进了混凝土中水传输和相关体积变化的微观力学模型。通过试验得到了混凝土约束收缩条件下的简单本构规律和开裂判据。结合这些材料模型，开发了有限元计算机程序，可以预测混凝土结构的干燥收缩裂缝。开发了基于矿物成分的水泥生热模型。在统一理念的基础上，还制定了力量发展模型。经过改进，可适用于水泥、高炉矿渣和粉煤灰混凝土。提出了高性能混凝土抗热裂设计方法。

项目成果

下村 匠,小沢 一雅: "細孔構造モデルによるコンクリート中の水分移動解析" コンクリート工学年次論文報告集. 14-1. 631-636 (1992)

Takumi Shimomura、Kazumasa Ozawa：“使用孔隙结构模型分析混凝土中的水运动”混凝土工程年报 14-1 631-636 (1992)。

岡村甫・前川宏一・小澤一雅: "ハイパフォーマンスコンクリート" 技報堂出版, 232 (1993)

Hajime Okamura、Koichi Maekawa、Kazumasa Ozawa：《高性能混凝土》Gihodo Publishing，232（1993）

T.SHIMOMURA,K.OZAWA: "Andysis of Water Movement in Concrete Based on Micro Pore Structural Model" Transactions of the Japan Cncrete Institute. 14. 115-122 (1992)

T.SHIMOMURA、K.OZAWA：“基于微孔结构模型的混凝土水运动的安迪”，日本混凝土研究所会刊。

Chaube, R.P., Shimomura, T.and Maekawa, K.: "Milti Phase Water movement in Concrete as a Multi Component System" Proc. of the Fifth RILEM Int. Symp. on Creep and Shrinakage of Concrete. 139-144 (1993)

Chaube, R.P.、Shimomura, T. 和 Maekawa, K.：“作为多组分系统的混凝土中的多相水运动”Proc。

Chaube,R.P.,Shimomura,T.and Maekawa,K.: "Multi Phase Water Movement in Concrete as a Multi Component System" Proc.of the Fifth RILEM Int.Symp.on Creep and Shrinkage of Concrete. 139-144 (1993)

Chaube,R.P.、Shimomura,T. 和 Maekawa,K.：“作为多组分系统的混凝土中的多相水运动”第五届 RILEM Int.Symp.on 混凝土蠕变和收缩的 Proc.。