Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Lightweight Concrete Fracture Energy Derived by Inverse Analysis

역해석으로 도출된 경량콘크리트의 파괴에너지 특성 분석

  • Received : 2014.11.25
  • Accepted : 2015.06.17
  • Published : 2015.09.01
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Abstract

Modern structures is the tendency of being increasingly taller and larger. The concrete with large weight has the disadvantage of increasing the weight on the structure. therefore, the method of carrying out the weight saving of the concrete is required. one of such method is to use a lightweight aggregate. However, studies on structural lightweight concrete, lacking for the recognition of the lightweight concrete, so also is lacking. therefore it is necessary to study on the physical characteristic value of the lightweight concrete. In this study, in order to investigate the tensile properties of lightweight concrete, Crack mouth opening displacement (CMOD) experiments were carried out. the fracture energy of the lightweight concrete subjected to inverse analysis were derived from the CMOD experimental results.

현대의 구조물은 고층화, 대형화 되어가는 추세이다. 보통중량 콘크리트는 강도에 비해 질량이 크기 때문에 구조물의 자중을 증가시킨다는 단점이 있다. 그러므로, 추세에 맞는 콘크리트의 경량화가 필요한 실정이다. 콘크리트의 경량화 방법 중 하나가 경량골재를 사용한 경량골재 콘크리트이다. 하지만, 국내에서는 경량골재 콘크리트에 대한 인식부족으로 인하여 구조용 경량골재 콘크리트에 대한 연구가 부족한 실정이다. 경량골재 콘크리트에 사용되는 경량골재의 품질에 따라 콘크리트의 물성 및 강도에 대한 검증이 필요하다. 본 연구에서는 보통골재와 경량골재를 사용한 콘크리트를 제작하고 인장균열파괴실험을 통해 하중-CMOD곡선은 얻고, 이를 역해석하여 파괴에너지를 도출하였다.

Keywords

References

  1. Kwon, D. S. (2011), A Study on the Physical characteristics of Lightweight Aggregate Concrete appried Pressure by Containing Moisture Condition in Lightweight Aggregates, Konkuk University master thesis.
  2. Shin, J. K. (2012), Physical Properties and Durability of Light Weight Concrete by Grading and Shape of Artificial Lightweight Aggregates, The Magazine of the Korean Society of Civil Engineers, Vol. 28, No.10, pp.105-112.
  3. Park, S. W. (2010), Mix proportion and shrinkage evaluation of lightweight concrete for high strength, Konkuk University master thesis.
  4. Shah, S. P., SwartzandC, S. E., Ouyang, S. (1995), Fracture Mechanics of Concrete, Jonh Wiley & Sons, Inc., New York.
  5. Bazantand, Z. P., Planas, J. (1998), Fracture and Size Effect in Concrete and Other Quasi brittle Materials, CRC Press, New York.
  6. Nomura, N., Mihashi H., Izumi, M. (1991), Correlation of fracture process zone and tensions of tening behavior in concrete, Cement and Concrete Research, Vol. 21, No. 4, pp.545-550. https://doi.org/10.1016/0008-8846(91)90104-P
  7. Thomas, (1990), Telford, (1993), ComiteEuro-International du Beon, CEB-FIP Model Code.
  8. Choi, K. (2010), Variation of Cracking Resistance of Self-Consolidating Concrete According to Ages, Myongji University Mix proportion and shrinkage evaluation of lightweight concrete for high strength.
  9. Song, B. H., Han, B. C., Sung, S. Y., Yun, H. D., Choi, C. S., Chung, S. Y. (2000), Flexural Behavior of Reinforced High-Strength Concrete Beams using Fly Ash Artificial Lightweight Aggregate, Journal of the Korea Institute for Structural Maintenance Inspection, Vol. 12, No. 2, pp.123-128.
  10. Jo, B. W., Park, S. K. (2004), The Mechanical Properties of Lightweight Concrete Using The Lightweight Aggregate Made with Recycled-plastic and high carbon fly ash, Journal of the Korea Concrete Institute, Vol.16, NO. 1, pp.640-643.
  11. Yang, W. J., Lee, W. H., Jee, S. W., Lee, H. S. (2009), Reinforcement Effect and Capacity of Punching Shear on Flat Plate Slab-Column Connections Using Eco Lightweight Concrete, Journal of the Architectural Institute of Korea, Vol. 25, No. 8, pp.53-60.
  12. Kim, J. I., Choi, Y. H., Kim, J. H. (2003), An Experimental Study on high Strength Lightweight Concrete Using Compound Materials, Journal of The korea society of industrials application, Vol. 6, No. 2, pp.115-122.
  13. Jo, B. W., Park, S. K., Park, J. B., Daniel C, J. (2004), The Fractural-Mechanical Properties and Durability of lightweight Concrete Using the Synthetic lightweight Aggregate, Journal of the Korea Concrete Institute, Vol. 16, No. 1, pp.19-25.
  14. Jung, I. H., Lee, J. W., Lee, J. S., Kang, Y. W., Yang, W. J., Lee, W. H. (2007), Performance Evaluation of Punching Shear on Flat Plate Slab-Column Connections Using Eco Lightweight Concrete, Journal of the Architectural Institute of Korea, Vol. 27, No. 1, pp.227-230.
  15. Zhao, Z., Kwon, S. H., Shah, S. P. (2008), Effect of specimen size on fracture energy and softening curve of concrete: Part 1. Experiments and fracture energy, Cement and Concrete Research Vol. 38, pp.1049-1060. https://doi.org/10.1016/j.cemconres.2008.03.017