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Application of High-Ductility Concrete to Next-age Reinforced Concrete Structure

高延性混凝土在下一代钢筋混凝土结构中的应用

基本信息

批准号：
11555153
负责人：
KITSUTAKA Yoshinori
金额：
$ 6.72万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

From the objectively point of view, reinforced concrete structures would be composed basic and fundamental materials anywhere we could get, so it would be capable for introducing the frame design of next-age's reinforced concrete structure which will contribute to progress environmental conscious construction system by using free-applicable materials in concrete. This study was investigated on the concept by experimental approaches and analysis. The some results are as follows(1)The results about fundamental qualities of high-ductility concrete were showed as properties of fluidity, shrinkage, fracture properties, the conditions of producing wall panels and the conditions of pull stress-slipped length of reinforced concrete member. In additions, the functions of the concrete as for fire resistance and self-recovery of shrinkage were investigated by the experiments.(2)The results about durability of high-ductility concrete were showed as evaluations of resistance to acid conditions, permeation of salinity, freezing-fusion resistance, resistance of corrosion of reinforcement, and it cleared the conditions of influence factors of durability of the concrete. The virtues of high-ductility concrete to durability were to decrease shrinkage by fibers and to expect to be improved the durable qualities of concrete.(3)The results about fundamental qualities of high-ductility concrete member were showed as properties of effectiveness of increasing sheer stress by fibers, effectiveness of canceling reinforcements for member by fibers, effectiveness of preventing to drop cover concrete, effectiveness of decreasing width of crack, improvement of fracture performance of concrete and light-weight changes of the reinforced concrete member. It cleared the fundamental factors in order to develop performances of reinforced concrete member using high-ductility concrete.

从客观上看，钢筋混凝土结构将在任何我们能得到的地方组成基本的和基本的材料，因此它将能够介绍下一代钢筋混凝土结构的框架设计，这将有助于在混凝土中使用自由适用材料来促进环保建筑体系的进步。本研究通过实验方法和分析的方法对这一概念进行了研究。主要研究结果如下：(1)高延性混凝土的基本性能主要表现为流动性、收缩、断裂性能、墙板的产生条件和钢筋混凝土构件的拉应力滑移长度条件。通过试验研究了高延性混凝土的耐火性能和收缩自恢复性能。(2)对高延性混凝土的耐久性进行了耐酸、耐盐、抗冻融、抗钢筋锈蚀性能评价，明确了影响混凝土耐久性的因素。高延性混凝土在耐久性方面的优点是减少纤维收缩，提高混凝土的耐久性能。(3)高延性混凝土构件的基本性能表现为：纤维提高剪应力的有效性、取消纤维加固构件的有效性、防止保护层混凝土掉落的有效性、减小裂缝宽度的有效性、混凝土断裂性能的改善和钢筋混凝土构件的轻质变化。明确了影响高延性混凝土构件性能发展的基本因素。