Round Timber Bolted Joints with Mechanical Reinforcement

Abstract

This paper presents the results of static tests of round timber bolted joints with inserted steel plates. All round timber joints static tests in tension were carried out on pressure machine EU 100 in laboratory of the Faculty of Civil Engineering VŠB-TU Ostrava. At first, timber specimens were tested without reinforcement. Based on these results, mechanical reinforcement methods were proposed: using modified washers and boost with screws. These samples were also tested. Rate of improvement in tensile strength was established for used reinforcement method.

Comparison of behaviour of laterally loaded round and squared timber bolted joints

“…s spruce wood is the most common type of timber, it was used as samples for testing. A few non-destructive tests were carried out before the onset of the static tests in the press, [4,5]. Dimensions of the test samples were adjusted to the equipment possibilities of the laboratory at the Faculty of Civil Engineering.…”

“…To compare the behaviour of this type of connections, a series of laboratory static tests in different inclinations of the loading force to the grain has been made. The reference tests of squared timber joints were also carried out [3]. Mechanical behaviour of the round and the squared timber bolted joints were tested in the laboratory of the Faculty of Civil Engineering in Ostrava.…”

Round Timber Joints under Tensile Loading Perpendicular to the Grain

“…For samples, spruce wood was used. Prior to the start of the static tests in the press, a few nondestructive tests were carried out [4,5]. The test samples were weighed on a laboratory scale, the moisture and dimensions of which were measured.…”

Reinforced Round Timber Bolted Joints under Cyclic Loading

“…Joint geometry has been designed according to European standards [3]. Detailed description of the samples can be found in [4]. Eighteen test samples were produced altogether.…”