Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Moment Resistance Performance Evaluation of Larch Glulam Joints using GFRP-reinforced Laminated Plate and GFRP Rod

GFRP 보강적층판 및 GFRP rod를 이용한 낙엽송 집성재 접합부의 모멘트저항 성능평가

  • Jung, Hong-Ju (Program of Forest Biomaterials Engineering, Division of Forest Material Science & Engineering, Kangwon National University) ;
  • Song, Yo-Jin (Program of Forest Biomaterials Engineering, Division of Forest Material Science & Engineering, Kangwon National University) ;
  • Lee, In-Hwan (Program of Forest Biomaterials Engineering, Division of Forest Material Science & Engineering, Kangwon National University) ;
  • Hong, Soon-Il (Program of Forest Biomaterials Engineering, Division of Forest Material Science & Engineering, Kangwon National University)
  • 정홍주 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공) ;
  • 송요진 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공) ;
  • 이인환 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공) ;
  • 홍순일 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공)
  • Received : 2015.08.20
  • Accepted : 2015.09.11
  • Published : 2016.01.25
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Abstract

Instead of metal connector generally used on the structural glued laminated timber rahmen joints, the GFRP reinforced laminated plates combining veneer and GFRP (Glass Fiber Reinforced Plastic) and bonded type GFRP rod were used as the connectors. As a result of moment resistance performance evaluation on the joint part applied with these connectors, the yield moment of specimen using the GFRP reinforced laminated plates and GFRP rod pin was measured 4 % lower in comparison to the specimen (Type-1) using the metal connectors, but the initial rotational stiffness was measured 29% higher. Also, the yield moment and rotational stiffness of the specimen using the GFRP-reinforced laminated plates and wood (Eucalyptus marginata) pin showed were measured 11% and 56% higher in comparison to the Type-1 specimen, showing the best performance. It was also confirmed through the failure shape and perfect elasto-plasticity analysis that it showed ductility behavior, not brittle fracture, from the shear resisting force by the pin and the bonding strength increased and the unification of member was carried out. On the other hand, in case of the specimen bonded with GFRP rod, it was impossible to measure the bonding performance or it was measured very low due to poor bonding.

구조용 집성재 라멘 접합부에 일반적으로 사용되는 접합철물을 대신하여 단판과 GFRP (Glass Fiber Reinforced Plastic)를 복합시킨 GFRP 보강적층판과 삽입 접착형 GFRP rod를 접합물로 사용하였다. 이들을 적용시킨 접합부에 대한 모멘트저항 성능평가 결과, 접합철물을 이용한 실험체(Type-1)와 비교하여 GFRP 보강적층판과 GFRP rod 핀을 사용한 실험체의 항복모멘트는 4% 낮게 측정되었으나 회전강성은 29% 높게 측정되었다. 또한 GFRP 보강적층판과 목재(Eucalyptus marginata)핀을 사용한 실험체는 Type-1 실험체와 비교하여 항복모멘트 11%, 회전강성 56% 높게 측정되며 가장 양호한 성능을 나타냈었다. 파괴형상과 완전탄소성 분석을 통해서도 핀에 의한 전단내력으로부터의 취성파괴가 아닌 연성거동을 나타내며, 접합내력이 상승하고 부재의 일체화가 이루어짐을 확인하였다. 반면, GFRP rod를 삽입 접착한 실험체는 접착 불량으로 측정이 불가하거나 접합성능이 매우 낮게 측정되었다.

Keywords

References

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