ASSESSING THE BOLTED CONNECTION STRENGTH OF DRYOBALANOPS

SITI NOOR ATIKAH, IHWAN (2018) ASSESSING THE BOLTED CONNECTION STRENGTH OF DRYOBALANOPS. [Final Year Project Report] (Unpublished)

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Abstract

This research study was initiated to assess the strength of timber bolted connections in local hardwood (i.e Kapur) that commonly used to construct the timber diaphragm of unreinforced masonry buildings in Malaysia. Lack of anchorage system causes unreinforced masonry buildings structure very vulnerable to seismic loading. Malaysia is one of the other countries that still have unreinforced masonry building that remain until these days, which are located in the town area or city central. Even though Malaysia is categorized as low seismic activity, but Malaysia has potential to experience moderate earthquake. This is because, nowadays, there are several earthquakes identified in Malaysia especially in Sabah. In order to maintain the unreinforced masonry buildings from any damages, due to the lack of data on local hardwood bolted connection, an experimental study on assessing the bolted connection strength of Kapur wood was initiated. Kapur wood was selected to carry out a series of double shear connection test because it is in group medium hardwood and in strength group 4 (SG4) and typically used as structural component in URM buildings. The basic properties of Kapur wood were obtained from the moisture content, density test and also embedding strength test for the purpose of predicting values of bolted connection strength using Row Shear Model and European Yield Model equations. Three group of Kapur wood with different configurations were tested in the bolted connection test. The experimental results were obtained to compare with the predicted strength values using three current design equations which are Malaysian Standard (MS544: Part 5: 2001), European Yield Model and Row Shear Model equations. The comparison using those three current standard equations was done in order to see the effectiveness of the equations. To design the bolted connection for retrofitting the unreinforced masonry buildings in Malaysia, it is recommended that the combination of two equations which are European Yield Model and Row Shear Model to be used.

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