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鉄筋錆の膨張によるRC構造の損傷過程とその力学モデルに関する研究

钢筋锈蚀扩展RC结构损伤过程及其力学模型研究

基本信息

批准号：
01550363
负责人：
梶川康男
金额：
--
依托单位：
Kanazawa 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：
1989
资助国家：
日本
起止时间：
1989 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550363/
关键词：
RC構造鉄筋腐食損傷

项目摘要

本研究では、鉄筋の錆がすでに発生しているRC構造中の錆による膨張圧と膨張ひびわれの力学的関係を詳細に調査し、それらが表現できるような力学モデルを提案し、その損傷度を解析的に把握し、適切な補強法を検討することをめざしている。得られた結果は以下を示す。1.腐食生成物としての薄い層を要素と考え、それに膨張として体積ひずみを与えることにより、腐食の膨張挙動をよく表すことができた。このモデルを用いて解析した結果、縦ひびわれ発生時の腐食量と腐食生成物の膨張率との関係が明らかとなった。2.ひびわれの進展状況の把握や膨張圧の推定を実験ならびに解析の両面から行った。(1)膨張圧の上昇期に卓越するひびわれは鉄筋間方向に入り、膨張圧はピ-クに達する。このひびわれ生成には鉄筋周辺の全体剛性が影響することから、このピ-ク値はかぶり厚の影響を強く受ける。(2)つぎに、ひびわれは底面あるいは側面のかぶり厚の小さい方向に進展し、やがてコンクリ-ト表面に達し、縦ひびわれとなる。したがって、そのかぶり厚さが膨張率に大きく影響する。(3)縦ひびわれ発生時およびそれ以降(縦ひびわれ幅拡大期)の膨張圧は、ほぼ100-120kgf/cm^2程度であることが求められた。(4)このような膨張圧とひびわれ状況から考えると、さびに関する点検は縦ひびわれ発生以後では遅すぎ、できれば鉄筋間ひびわれ発生以前に点検を実施するのが望ましいことがわかる。

The purpose of this study is to analyze the mechanical properties of RC in this study. In this study, the mechanical properties of mechanics are analyzed in this study, and the results of this study are as follows: in this study, the results of this study are as follows: in this study, the results of this study are as follows: in this study, the results of this study are as follows: in this study, the results of this study are as follows: in this study, the mechanical properties of mechanics, mechanical properties, mechanical properties and mechanical properties were analyzed. The results are shown below. 1. The ingredients of saprophytic products were examined, and the factors of saprophytic products were tested, the data of saprophytic products were analyzed, and the data of saprophytic products were analyzed. The results of the analysis of the results, the amount of saprophytic food and the expansion rate of saprophytic products during the period of birth were determined by the method of quantitative analysis. two。 If you are in a state of development, you have a good idea of how to expand the presumption that you are going to have a problem. The main contents are as follows: (1) during the last period of the expansion, the two sides of the tendon were inserted in the direction between the tendons. The whole body is affected by the thickness of the tendon and the thickness of the tendon. (2) on the bottom side, on the bottom side. There is a big increase in the rate of expansion in terms of thickness and thickness. (3) when you are in the middle of your life, you need to make sure that you need to make sure that you have to pay a lot of money during your lifetime. (3) when you are in the middle of life, you need to make sure that you are going to have to pay a lot of money. (3) when you are in the middle of your life, you need to make sure that you have to pay more than 100-120kgf/ cm. (4) after the birth of the health care workers, they should pay attention to the health care of the students before they are born.