Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Evaluation on Transverse Load Performance of Lightweight Composite Panels

경량 복합패널의 분포압 강도 성능 평가

  • Received : 2017.11.15
  • Accepted : 2018.01.05
  • Published : 2018.01.31
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Abstract

Over the last 10 years, the number of disasters has been increasing in Korea. As a result, the need for temporary residences or shelters for disaster conditions is increasing. In this study, post-disaster refugees housing was developed using lightweight composite panels that are lighter than the materials that make up the existing shelter. To accomplish this, the structural performance of the lightweight composite panel was validated. Among the performance tests on the panels, the transverse load test was conducted according to the ASTM E 72 criteria. As a result of the experiment, when each specimen was subjected to a uniformly distributed load, the allowable load was determined according to the span. All the experiments were ended due to a loss of adhesive at the junction of the skin and core. Further analysis was conducted to calculate the shear stress when the junction was dropped. The mean shear stress at the adhesive surface of a specimen, 150 mm and 200 mm in thickness, was 0.0170MPa and 0.0156MPa, respectively. This suggests that similar values were obtained from panels of equal thickness. In addition, this stress provides a criterion of judgment that could be used to inspect the structural performance of the panels. The performance of the panel was evaluated based on the allowable load, but it may be possible to increase the strength of the lightweight composite panel by improving the joining method to avoid separation from the junction.

최근 10년 동안 국내에서는 각종 재난이 증가하고 있다. 이에 따라 재해, 재난 환경에 적합한 임시거주공간 혹은 피난시설의 필요성이 증대되고 있다. 본 연구에서는 기존 피난시설을 구성하는 소재들보다 가벼운 경량 복합패널을 이용하여 구호주거를 제작하고자 하였다. 이를 위해 경량 복합패널에 대한 구조적 성능을 검증하고자 하였으며, 패널에 대한 성능 시험 방법 중 ASTM E72 기준에 따른 분포압 강도 실험을 진행하였다. 실험 결과, 각 실험체가 등분포하중을 받을 때, 스팬에 따른 허용하중을 알아내었다. 모든 실험체는 스킨과 코어의 접합부에서의 탈락으로 인해 실험이 중단되었으며, 이를 추가로 분석하여 접합부가 탈락될 때의 전단 응력을 계산하였다. 코어가 150mm인 실험체의 경계면에서의 전단응력은 평균 0.0170MPa, 코어가 200mm인 실험체의 경계면에서의 전단응력은 평균 0.0156MPa이다. 이를 보았을 때 같은 두께의 패널에서 유사한 값이 나왔다고 할 수 있다. 이 값을 통해 패널의 분포압 강도 성능을 합리적으로 예측할 수 있는 근거를 제시하였다. 또한 결과 값으로 나타낸 허용하중을 근거로 패널의 성능을 평가하였으나, 패널의 스킨과 코어의 접합방법을 개선하여 경계면에서의 조기박리를 방지한다면 경량 복합패널의 분포압 강도 성능을 보다 개선시킬 수 있을 것으로 판단된다.

Keywords

Acknowledgement

Supported by : 국토교통부

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