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Aging Characteristics of Bolt Pretension of Stress-laminated Timber

응력적층재의 볼트 압체력 경시변화

  • Eom, Chang-Deuk (Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute) ;
  • Lee, Sang-Joon (Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute) ;
  • Kim, Kwang-Mo (Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute)
  • 엄창득 (국립산림과학원 녹색자원이용부 재료공학과) ;
  • 이상준 (국립산림과학원 녹색자원이용부 재료공학과) ;
  • 김광모 (국립산림과학원 녹색자원이용부 재료공학과)
  • Received : 2011.10.14
  • Accepted : 2011.11.16
  • Published : 2011.11.25

Abstract

In this study, it is carried out to analysis of the bolt pretension of the stress-laminated timber. Bolt pretension of stress-laminated timber was decreased by time. The loss of force is caused by moisture content, shrinkage of wood. After re-stressing the stress-laminated timber, the rate of force decrement was slowed significantly. To use of stress-laminated timber for the service, it is necessary to make an accurate estimate of force. It is clear that is different between actual value and predicted value changes by existing model for bolt pretension of stress-laminated timber. Accordingly, considering the time and the external environment, the development of prediction model is needed.

본 연구는 응력적층재의 압체력 경시변화에 대한 분석을 위해 수행되었다. 실내 외에 설치한 응력적층재의 압체력은 시간에 따라 감소하였으며, 응력적층재의 재압체 후 압체력 감소의 속도는 현저히 느려졌다. 하지만 응력적층재의 실사용을 위해서는 정확한 압체력의 예측이 필요한 것으로 사료된다. 기존의 압체력 예측 모델을 적용하여 압체력의 경시변화를 예측한 결과와 실제 압체력 변화는 상이한 양상을 나타내었으며, 이에 따라 시간과 외부환경에 따른 응력적층재의 압체력 예측 모델의 개발이 필요할 것으로 사료된다.

Keywords

References

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Cited by

  1. Structural Performance Evaluation on Stress-Laminated Timber Bridge Deck Using Finite Element Analysis vol.42, pp.1, 2014, https://doi.org/10.5658/WOOD.2014.42.1.20