BEHAVIOR OF CRACK IN CONCRETE REINFORCED BY GRID-TYPE CARBON FIBER NET

网格型碳纤维网增强混凝土的裂缝行为

基本信息

批准号：
05650436
负责人：
MAKIZUMI Tatsunori
金额：
$ 1.34万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650436/
关键词：
Carbon fiber Continuous fiber reinforcement Crack Control of cracking Anchorage Effect of grid コンクリート繊維補強材炭素繊維ネット

项目摘要

(1) Method for tensile test to examine the properties of Carbon Fiber NetTo examine the bihavior of crack in concrete reinforced by Carbon Fiber Net, it is necessary to understand the characteristics of materials and anchorage mechanism of fiber reinforcement. So the methods of bending test using beams with notch at the center of specimen was examined to understand them. As the results, it was possible to understand the characteristics of the materials and the anchorage mechanism by using the testing method like the case of direct tensile tests.(2) Study on distribution of strain of Carbon Fiber Net in concreteStrain characteristics of Carbon Fiber Net was studied by the above method under tensile loads. At first, strain gauges were attached to the center of longitudinal fiber within some meshes. In order to measure the resistance force in the transverse fibers, the longitudinal fiber strain in each mesh was measured. While the load was increasing, the changes of fiber strain were meas … More ured.As the results are as follows :a) Resistance forces were transferred to next transverse fiber in order.b) The existence of transverse fibers that aren't necessary for anchoring don't influence the behavior of strain.c) If fiber reinforcements have the scattering of strains, they rupture with keeping the scattering.(3) Expression of equation that shows the anchorage mechanism of Carbon Fiber NetThe properties of strains were tried to understand quantitatively by using elastic spring model that express the effect of the grid. In this paper, to express correctly the real properties with reference to elastic spring model that suggested in the study of the past, the resistance of transverse fiber was used to the model. And this study made the following condition "If the resistance exceeds the ultimate, a displacement of grid's intersection point grow". That condition made it possible to calculate the strain that reduced like a stair. In future, we will investigate the calculating crack width by using this theory. Less

（1）拉伸的方法检查碳的性质检查由碳纤维净化的混凝土裂纹的双毛线，以了解材料的特性和纤维增强纤维的锚固机制。材料和锚固机制的特性使用了直接拉伸测试的情况，在碳纤维网中的碳纤维网的分布在碳纤维网中研究了上述方法。横向纤维内的纵向纤维的中心，载荷的增加如下：a）电阻力被转移到下一个横向纤维中。菌株的菌株的行为，以保持散射的破裂。在过去的研究中提到的弹性弹簧模型的实际特性，使用了电阻纤维的模型。未来，我们将通过使用理论来研究裂纹宽度。