대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제32권5A호
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  • Pages.289-297
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  • 2012
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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응력파속도를 이용한 부착식 PSC 텐던의 긴장력 추정

Estimation of Prestressed Tension on Grouted PSC Tendon Using Measured Elastic Wave Velocity

  • 김병화 (경남대학교 토목공학과) ;
  • 장정범 (한국전력공사 전력연구원) ;
  • 이홍표 (한국수력원자력 중앙연구원) ;
  • 이일근 (한국도로공사 도로교통연구원)
  • 투고 : 2012.04.12
  • 심사 : 2012.06.25
  • 발행 : 2012.09.15
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초록

본 연구는 부착식 PSC 텐던의 응력파 속도를 계측하여 텐던에 도입된 긴장응력을 추정 할 수 있는 실험식을 제안한다. 실용적 실험식의 도출을 위하여 도입 긴장력이 다른 다수의 PSC시험체가 제작되었으며, 다양한 조건에서 종진동 실험이 반복 수행되었다. 도입 응력과 응력파 속도 사이의 관계에 영향을 미칠 수 있는 온도, 길이 및 텐던의 개수 등이 영향인자로 고려되었으며, 상사의 법칙을 적용하여 무차원 실험식이 도출 되었다. 제안 기법의 현장 적용성 검증은 실제 발전소 격납건물에 설치된 수직텐던에 대하여 수행되었다. 제안식을 이용하여 추정된 긴장응력은 텐던의 설계응력과 유사하다.

This study proposes an experimental formula that can estimate the applied tensile stress of a bonded PSC by measuring a longitudinal stress wave velocity of tendon. To develop practical formula, the various bonded PSC specimens are constructed with different levels of prestresses. For all the bonded PSC specimens, the longitudinal impact-echo tests are repeated with various experimental conditions. Considering a few influence factors such as temperature, length and the number of strands, the application of the law of similarity results in a nondemensional experimental formula that could estimate existing tensile stress on tendon by measuring its longitudinal stress wave velocity. Next, a feasibility study of proposed approach has been conducted for a real reactor building containment. The estimated stress levels of two vertical tendons embedded in the nuclear plant are close to their design values.

키워드

참고문헌

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  12. Wyche, A. (1978) Wolsung-1 Nuclear Power Plant Desigh Report: Reactor Building Containment Structure Stress Analysis Report, CANATOM, Report No. DR-0059-21020-02.

피인용 문헌

  1. Experimental Evaluation of Prestress Force in Tendons for Prestressed Concrete Girders using Sensors vol.28, pp.6, 2015, https://doi.org/10.7734/COSEIK.2015.28.6.715
  2. Feasibility Study of Stress Measurement in Prestressing Tendons Using Villari Effect and Induced Magnetic Field vol.9, pp.11, 2013, https://doi.org/10.1155/2013/249829
  3. A Feasibility Study for Estimating Prestressed Stress on a Steel Wire Using Permeability of Magnetic Flux vol.17, pp.5, 2013, https://doi.org/10.5000/EESK.2013.17.5.219