Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)
- 2006.05a
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- Pages.238-241
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- 2006
A study on Strengthening and Rehabilitation of Concrete girder bridge using Multi-Stepwise Thermal Prestressing Method
온도프리스트레싱 공법을 이용한 콘크리트교량의 보수보강에 관한 연구
- Published : 2006.05.11
Abstract
The needs for strengthening and rehabilitation of the concrete bridges are a growing concern in many countries and has been emphasized in various researches and papers. Traditional external post-tensioning method using either steel bars or tendons is commonly used as a strengthening method. However, the method has some disadvantages such as stress concentration at the anchorages. Multi-stepwise thermal prestressing method is a newly proposed method for strengthening and rehabilitation of concrete girder bridges. Founded on a simple concept of thermal expansion and contraction of steel, the method is a hybrid method of external post-tensioning and steel plate bonding, combining the merits of two methods. In this paper, basic concepts on strengthening and rehabilitation of concrete girder are presented and an illustrative experiment is introduced.
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