THE FLEXURAL RIGIDITY RATIO OF INDONESIAN TIMBER BOLT-LAMINATED BEAM

  • Yosafat Aji Pranata Maranatha Christian University, Bandung, Indonesia
  • Bambang Suryoatmono Parahyangan Catholic University, Bandung, Indonesia
  • Johannes Adhijoso Tjondro Maranatha Christian University, Bandung, Indonesia

Abstract

Bolt-laminated  beam  is  mechanically-constructed  beam  from  layered  timbers  using  steel  bolts,  much deeper than solid timber section. The benefits of bolt-laminated beams are the deeper structure gives greater structural capacity, no glues are used providing  a more sustainable solution, and no risk of separation along laminates. The aim of this research is to obtain the flexural rigidity ratio (stiffness) of boltlaminated timber beams, arranged using laminae (more than one lamina, same species) of Pete, Nyatoh, Durian, Red Meranti, Keruing, and Acacia Mangium. In the numerical model  (nonlinear finite element method),  timber  is  modeled  as  a  nonlinear  inelastic  orthotropic  material  and  bolts  are  modeled  as nonlinear elasto-plastic isotropic material. Results obtained from both numerical method and experimental tests indicated that the trend of the load-displacement curves are bilinear. The empirical equation for the flexural rigidity ratio (kEI) obtained from this research (with R2 0,829) is based on six parameters, namely SG  (specific gravity), db  (bolt diameter), n  (number of lamina), L  (beam-span), a/s  (bolt-row per boltspacing ratio), and hl/bl (height per width ratio of lamina).

Published
2011-08-01
How to Cite
AJI PRANATA, Yosafat; SURYOATMONO, Bambang; ADHIJOSO TJONDRO, Johannes. THE FLEXURAL RIGIDITY RATIO OF INDONESIAN TIMBER BOLT-LAMINATED BEAM. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 033, aug. 2011. Available at: <http://proceeding.eacef.com/ojs/index.php/EACEF/article/view/377>. Date accessed: 19 may 2024.
Section
Group of Structural and Construction Engineering