Experimental study of cross-laminated timber wall panels

Abstract

The use of cross-laminated structural timber elements is becoming increasingly popular. The number of layers varies normally from three upwards. The structural performance of five-layer cross-laminated timber elements was investigated. The five layers consisted of 19 mm thick boards, laid successively at right angles to each other and glued together with PU-adhesive, layers 1, 3 and 5 lying in one direction and layers 2 and 4 in the other. The stiffness and strength of four cross-laminated timber elements (4955 mm long, 1250 mm wide and 96 mm thick) were studied during in-plane bending. Two of the elements were first partitioned into two parts that were reconnected in two different ways prior to testing. The influence of the way in which the crosslaminated timber elements were reconnected was studied, the behaviour observed being compared with the test results for the unpartitioned specimens with respect to both strength and stiffness. The experimental tests performed showed the cross-laminated timber elements to possess a high degree of stiffness and strength. There was also found to be a marked difference in behaviour between the two different ways in which the elements were connected to each other. One of the two connecting methods studied, being of less good design but earlier frequently used in Sweden, showed as expected poor structural performance, whereas the other one applied as a safer alternative performed well.

Shear Strength and Durability Testing of Adhesive Bonds in Cross-laminated Timber

“…This specific orientation results in increased in-plane and out-of-plane strength, rigidity and stability. The degree of anisotropy in properties and the influence of natural variations, such as knots, are reduced in comparison with construction timber [1][2][3][4][5][6]. Load-bearing CLT wall and floor panels are easily assembled on site to form multi-storey buildings, improving construction and project delivery time, reducing costs, and maximising efficiency on all levels [2,[7][8][9][10].…”

Effects of the thickness of cross-laminated timber (CLT) panels made from Irish Sitka spruce on mechanical performance in bending and shear

“…This specific orientation results in excellent in-plane and out-of-plane strength, rigidity, and stability characteristics. The degree of anisotropy in properties and the influence of natural variations, such as knots, are reduced in comparison with construction timber [1][2][3][4][5][6]. Load-bearing CLT wall and floor panels are easily assembled on site to form multi-storey buildings, improving construction and project delivery time, reducing costs, and maximising efficiency on all levels [2,[7][8][9].…”

“…Blass and Fellmoser [17] proposed that only for span-to-depth ratios of at least 30 could the influence of shear be disregarded for loading perpendicular to the plane. In another study Vessby et al [5] investigated the structural performance of 5-layer cross-laminated timber elements, made of 19 mm thick C24 boards glued together with PUR adhesive. The stiffness and strength of four cross-laminated timber elements (4955 mm long, 1250 mm wide and 96 mm thick) were studied during in-plane bending.…”

Comparison of multi-storey cross-laminated timber and timber frame buildings by in situ modal analysis

“…The stiffness of CLT systems has been studied both in terms of the overall elastic properties of the panels themselves (Gsell et al, 2007), and those of complete structural systems including connections (Vessby et al, 2009). The seismic performance of the components and systems in CLT buildings was widely studied (Gavric et al, 2015;Fragiacomo et al, 2011), and full-scale shaking table tests of buildings were carried out under the SOFIE project (Ceccotti et al, 2013).…”