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Journal: International Journal of Civil Engineering and Technology (IJCIET) (Vol.10, No. 3)

Publication Date:

Authors : ;

Page : 440-453

Keywords : Kempas timber; post-tensioning; bending jacking; pre-stressing jacking;

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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.

Last modified: 2019-05-17 15:58:43