KEMPAS TIMBER UN-BONDED POST-TENSIONING SOLUTION NEW APPROACH
Journal Title: International Journal of Civil Engineering and Technology - Year 2019, Vol 10, Issue 3
Abstract
Post-tensioning technique is a commonly used for concrete structure. This technique had many advantage, it gives thinner section larger span, better cracking resisting sections. For timber material it is a new technique with limited use. in this paper a natural timber (Malaysian Kempas type) is used in post-tensioning solution. Two methods are investigated for post-tensioning solution. The first method is the standard method of post-tensioning which used commonly in concrete pre-stressing that include pump and jack tools. The other method is a new way for post-tensioning that depending on the fundamentals of pre-stressing and bending theory. Two type of threaded rod bar are used. The two methods were deflection control process and the post-tensioning force estimated by stress-strain relation. The limitation of posttensioning force was depending on the timber, rod bar strength capacity. The results clear that standard method is more effective in post-tensioning process while the posttensioning by bending is safer for specimens due to avoiding stress concentration at the end face of beam
Authors and Affiliations
WISSAM MUSHINA, DAVID YEOH, JALAL MUSHINA, NORHAYATI ABD GHAFAR, KOH HENG BOON
Keywords
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