A fundamental study on deterioration of the existing RC beam by chemical and mechanical damage

Yoshimi Sonoda, N. Murato, H. Hikosaka

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

2 被引用数 (Scopus)

抄録

Recently, the maintenance problem of existing RC structures has increased in Japan, and it is important to estimate the total life cycle cost of structure, which includes not only construction cost but also maintenance cost. In order to accomplish this purpose, it is necessary to evaluate the durability and predict the deterioration of the existing structures accurately. In this study, the damage evolution processes caused by chemical and mechanical effects are considered by using continuum damage mechanics. Within the framework of this method, chemical damage due to the corrosion of the steel bar is considered, and the coupling effect between chemical damage and mechanical damage is calculated by introducing two independent scalar damage variables into the constitutive equation. To calculate the chemical damage evolution, diffusion process of the chloride ions that strongly affect the corrosion of the steel bar in the concrete beam is solved, and evaluate the effective cross-sectional area of the steel bar. It is found that the proposed method could evaluate the deterioration of the existing RC beam, and the change of its ultimate strength under the various exposition conditions.

本文言語英語
ホスト出版物のタイトルFatigue Damage of Materials
ホスト出版物のサブタイトルExperiment and Analysis
編集者A. Varvani-Farahani, C.A. Brebbia, A. Varvani-Farahani, C.A. Brebbia
ページ295-306
ページ数12
出版ステータス出版済み - 12 1 2003
イベントFirst International Conference on Fatigue Damage of Materials Experiment and Analysis, Fatigue Damage of Materials - Toronto, Ont., カナダ
継続期間: 7 14 20037 16 2003

出版物シリーズ

名前Advances in Damage Mechanics

その他

その他First International Conference on Fatigue Damage of Materials Experiment and Analysis, Fatigue Damage of Materials
国/地域カナダ
CityToronto, Ont.
Period7/14/037/16/03

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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