Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Effects of Corrugated GFRP Shear Connector Width and Pitch on In-plane Shear Behavior of Insulated Concrete Sandwich Wall Panels (CSWP)

파형 GFRP 전단연결재의 폭 및 너비에 따른 중단열 벽체의 면내전단거동

  • Received : 2013.10.07
  • Accepted : 2014.04.27
  • Published : 2014.08.30
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Abstract

This paper describes the experimental results of insulated concrete sandwich wall panels (CSWP) with corrugated glass fiber-reinforced polymer (GFRP) shear connectors under in-plane shear loading. Corrugated GFRP shear connectors were used to improve the thermal property of insulated CSWP and to achieve composite action between the interior and exterior concrete wall panels. Test specimens were consist of three concrete panels with two insulation layers between concrete panels and middle concrete panels was loaded in the direction of gravity. To evaluate the effects of insulation types (extruded polystyrene, XPSS and expanded polystyrene, EPS), shear connector pitch (300 and 400 mm) and width (10 and 15 mm) on in-plane shear behavior of insulted CSWP, failure mode and shear flow-average relative slip relationship of specimens were investigated. Test results indicate that the bond stress between concrete panel and insulation is considerable initially. Especially in case of insulated CSWP without shear connector, initial stiffness of CSWP with XPSS is superior to that of CSWP with EPS. The shear connector's contribution to in-plane shear performance of insulated CSWP depends on the type of insulation.

이 연구는 파형 GFRP 전단연결재가 보강된 중단열 벽체의 면내전단거동을 알아보기 위하여 실시되었다. 기존의 중단열 벽체의 단열성능 향상과 내/외측 벽체의 합성거동을 위하여 파형 GFRP 전단연결재를 보강하였다. 실험체는 2개의 단열재로 구분된 3개의 콘크리트 벽체로 구성되어 있으며, 중앙부 벽체에 수직방향의 전단력을 가하였다. 주요변수는 단열재의 종류 (압출법 보온판 및 비드법 보온판) 및 보강된 전단연결재의 너비(300 및 400 mm)과 폭(10 및 15 mm)를 변수로 설정하였으며, 실험체의 파괴양상 및 전단흐름강도-평균상대변위 관계 대한 분석을 실시하였다. 실험 결과 콘크리트와 단열재의 부착응력은 중단열 벽체의 초기거동에 상당한 영향이 있는 것으로 판단되며, 전단연결재가 보강되지 않은 경우 XPSS를 사용한 중단열 벽체의 강성 및 강성이 EPS 단열재의 경우보다 높게 나타났다. 전단연결재의 보강효과는 단열재에 따라 상이하게 나타났으며, 전단연결재의 보강상세에 단열재의 역학적 특성을 고려해야 할 것으로 판단된다.

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References

  1. Committee on Green Growth, 2009.
  2. Korea Institute of Construction Technology, 07 Louisville Energy Alliance Trade Show, 2009.
  3. Korea Institute of Construction Technology, Development of Insulated Concrete Sandwich Panel with Improve Insulation Performance (R&D /10CHUD-C057023-01), 2011, pp. 1-18.
  4. PCI Committee on Precast Sandwich Wall Panels, "State-of-the-Art of Precast/Prestressed Sandwich Wall Panels," PCI Journal, Vol. 42, No. 2, 1997, pp. 32-48, 92-134. https://doi.org/10.15554/pcij.09011997.32.42
  5. PCI Committee on Precast Sandwich Wall Panels, "State-of-the-Art of Precast/Prestressed Sandwich Wall Panels Second Edition," PCI Journal, Vol. 56, No. 2, 2011, pp. 131-176.
  6. You, Y. C., Kim, J. H., Kim, H. R., and Choi, K. S., "Flexural Behavior of Insulated Concrete Sandwich Wall Panels Reinforced with Glass Fiber-Reinforced Polymer Shear Grid by Using Different Types of Insulation," AIK Structure Journal, Vol. 27, No. 11, 2011, pp. 61-70.
  7. Oh, T. S., Jang, S. J., Lee, K. M., and Yun, H. D., "Insulation Type Effect on the Direct Shear Behavior of Concrete Sandwich Panel (CSP) with Non-Shear Connectors," Advanced Materials Research, Vol. 663, 2013, pp. 154-158. https://doi.org/10.4028/www.scientific.net/AMR.663.154
  8. Bush, T. D. and Stine, G. L. "Flexural Behavior of Composite Precast Concrete Sandwich Panels with Continuous Truss Connectors," PCI Journal, Vol. 39, No. 2, 1994, pp. 112-1218. https://doi.org/10.15554/pcij.03011994.112.121
  9. Pessiki, S. and Mlynarczyk, A., "Experimental Evaluation of the Composite Behavior of Precast Concrete Sandwich Wall Panes," PCI Journal, Vol. 48, No. 2, 2003, pp. 54-71. https://doi.org/10.15554/pcij.03012003.54.71
  10. Salmon, D. C., Einea, A., Tadros, M. K., and Culp, T. D., "Full-Scale Testing of Precast Concrete Sandwich Panels," ACI Structure Journal, Vol. 94, No. 32, 1997, pp. 354-362.
  11. Jang, S. J., You, Y. C., Kim, H. R., and Yun, H. D., "Effect of Class Fiber-Reinforced Polymer (GFRP) Shear Connector's Shape on Inplane Shear Strength of Insulated Concrete Sandwich Panels," KSMI Journal, Vol. 17, No. 4, 2013, pp. 9-17.
  12. Korea Standards Association, "KS F 2405. Standard Test Method for Compressive Strength of Concrete, 2005, pp. 1-6.
  13. A Subsidiary of the International Code Council Evaluation Service, "Acceptance Criteria for Semi-Continuous Fiber-Reinforced Grid Connectors Used in Combination with Rigid Insulation in Concrete Sandwich Panel Construction," 2010, pp. 1-10.