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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
한국철도학회 한국철도학회 학술발표대회논문집 한국철도학회 2004년도 추계학술대회논문집
발행연도
2004.10
수록면
264 - 270 (7page)

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연구배경
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초록· 키워드

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With the recent continuous expansion of subways, newly created subways tend to have lower locations and wider sections. Furthermore, since box structures and evacuating tunnels are classified into a category of mass-concrete, the thermal-stress, emitted from the inside, causes cracks to structures from the inception of constructing.
In this paper, thermal-stress analysis and durability evaluation of box structure were carried out to investigate relationship between durability and parameter causing the heat of hydration. Through the examination, this paper tries to find out satisfactory solutions to regulated thermal crack and ensure the required duration period.
The results of this paper showed that to control thermal crack and guarantee the required duration period it was more effective to use low-heat-portland cement and moderateheat-portland cement. As cement volume due to reduction of water-cement ratio increased, the possibility of thermal cracks occurrence increased but results of durability evaluation was different depending on evaluation method. The results showed that the appropriate water-cement ratio to control the heat of hydration and satisfy the required durability was 45~55%.
And it was showed that during placement of concrete blocks ambient temperature affect the heat of hydration, thermal crack and long-term durability largely and when concrete was placed at low temperature to control thermal crack, it need to try to guarantee the required duration period. Henceforth, by studying not only internal and external conditions, such as the relative humidity and the unit weight, but also methods, to evaluate durability, in accordance with domestic situations, more reasonable design of durability should be achieved.

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ABSTRACT
1. 연구배경 및 목적
2. 연구내용
3. 수화열 해석 및 내구성 평가 결과
4. 결론
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