DOWEL-BEARING STRENGTH OF KEMPAS USING "SPRING THEORY"
Article sidebar
Main article
Abstract
Dowel-bearing strength of wood is one of the parameters that are needed to determine the load-carrying capacity of timber joint. However, none of the available standard consists of dowel bearing –strength of wood compressed with wood dowel. The existing standards are based on the dowel bearing-strength of wood based material compressed with steel dowel. The dowel bearing-strength of wood based material for this study was tested on the Kempas species compressed by 21 mm diameter dowel and was determined by using the ‘Spring Theory’. The experimental work of the actual dowel-bearing strength of wood based material compressed with the steel dowel (WBCSD) and combined with the wood dowel that was compressed with steel block (WDCSB) were reported. It was found that the lowest 5% offset load was in the ‘Spring Theory’ (WBCSB + WDCSB) (28.57 kN) compared to the actual WBCSB (36.35 kN). These differences show that the actual WBCSD is 10% higher than the value of the ‘Spring Theory’. Therefore the dowel-bearing strength of the based material of Kempas compressed with wood dowel is taken from the lowest bearing strength that is 33.19 Mpa resulted from the ‘Spring theory’. It is therefore can be concluded that the ‘Spring Theory’ is also applicable to be used for the tropical timber species.
