Effect of Gluelines for Mengkulang Glulam Dowel-Bearing Strength

 
 
 
  • Abstract
  • Keywords
  • References
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  • Abstract


    Malaysia is one of the tropical countries around the world which is the pioneer in timber harvesting. Mengkulang is known for its strength and durability. In timber construction, connection is the most important part. The strength of timber has huge impact of the connection strength and the whole structure. Furthermore, timber strength connections also depend on the factor affecting which is bolt diameters and end distances. The objectives of this research are to determine the dowel-bearing strength for 12mm, 16mm and 20mm bolt diameter thus to compare the dowel-bearing strength between glue line and without glue line. The dowel-bearing strength test was tested on Mengkulang timber species for different dowel diameters which are 12mm, 16mm and 20mm for with and without glue line parallel to the grain using half-hole test. The dowel-bearing strength, Fy values of 5% diameter offset-load, F5% are obtained from load versus displacement graph using ASTM D5764-97a. The dowel-bearing strength, Fy for 20mm diameter with glue line showed 14.71 N/mm2 higher than 16mm diameter and 12mm diameter with 14.44 N/mm2 and 11.63 N/mm2 accordingly. While, the dowel-bearing strength, Fy for 20mm diameter without glue line showed 15.64 N/mm2 higher than 16mm diameter and 12mm diameter with 14.71 N/mm2 and 14.44 N/mm2 respectively. In conclusion, the bigger diameter the higher dowel-bearing strength and the dowel-bearing strength for without glue line showed higher than dowel-bearing strength with glue line.

     

     


  • Keywords


    Mengkulang; connection; bolt diameters; dowel-bearing strength; half-hole test.

  • References


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      [3] W. W. Mohamad, M. A. Razlan, & Z. Ahmad,. Bending strength properties of glued laminated timber from selected Malaysian hardwood timber. Int. J. Civ. Environ. Eng, 11(4), 2011, pp. 7-12.Fauci AS, Braunwald E, Kasper DL & Hauser SL (2008), Principles of Harrison’s Internal Medicine, Vol. 9, 17thedn. McGraw-Hill, New York, NY, pp.2275–2304.

      [4] Smith et al, Capacities of Dowel-Type Fastener Joints in Australian Pine.Journal of Materials In Civil Engineering.American Society of Civil Engineering,2005

      [5] Abd Malek, N. J., Hassan, R., Raja Hussin, T. A., Ng, D. T., & Adam, C. Perpendicular dowel-bearing strength properties without glue line for Mengkulang species. Journal of Mechanical Engineering, 13(1), 2016, pp. 46-56.

      [6] American Society for Testing and Materials. Standard Test Method for Evaluating Dowel- Bearing Strength of Wood and Wood-Based Products, 2007, American Society of Testing and Materials Designation D 5764-97a.

      [7] R. Hassan, A. Ibrahim, Z. Ahmad, & M. Yusoff,. Dowel-bearing strength properties of two tropical hardwoods. In InCIEC 2013, 2014, pp. 27-36, Springer,Singapore.

      [8] R. Hassan, A. Ibrahim, & Z. Ahmad,. Bending behaviour of dowelled mortise and tenon joints in Kempas. Scientific Research Journal, 5(1), 2008, pp. 1-11.


 

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Article ID: 25698
 
DOI: 10.14419/ijet.v7i4.42.25698




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