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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.

从客观的角度来看，钢筋混凝土结构将是最基本和最基础的材料，我们可以在任何地方得到，所以它将是可以介绍下一个时代的钢筋混凝土结构的框架设计，这将有助于推进环保意识的建筑体系，使用自由适用的材料在混凝土。本研究通过实验方法和分析对这一概念进行了研究。（1）研究了高延性混凝土的流动性、收缩性能、断裂性能、墙板的制作条件和钢筋混凝土构件的拉应力-滑移长度等基本性能。此外，还对混凝土的耐火性能和收缩自恢复性能进行了试验研究。（2）对高延性混凝土耐久性进行了耐酸、抗盐渗透、抗冻融、抗钢筋锈蚀等方面的评价，明确了影响高延性混凝土耐久性的因素。高延性混凝土耐久性的优点在于纤维能有效地减少混凝土的收缩，提高混凝土的耐久性。（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、纤维取消构件配筋的有效性、防止混凝土脱落的有效性、减小裂缝宽度的有效性、改善混凝土断裂性能的有效性和钢筋混凝土构件的轻量化。明确了采用高延性混凝土提高钢筋混凝土构件性能的基本因素。