The Influence of Panel Lay-Up on the Characteristic Bending and Rolling Shear Strength of CLT

Conan O’Ceallaigh,Karol Sikora,Annette Harte

doi:10.3390/buildings8090114

Conan O’Ceallaigh, Karol Sikora + Show 1 more

Open Access

https://doi.org/10.3390/buildings8090114

Copy DOI

Abstract

The objective of this study was to characterise the behaviour of cross laminated timber (CLT) panels and the influence of the panel lay-up on the failure strength. Three different panel configurations of thickness, 60 mm, 100 mm, and 120 mm, were loaded in the out-of-plane direction. The 60 mm and 120 mm panel configuration comprised three layers of equal thickness, and the intermediate 100 mm thick panel comprised five layers of equal thickness. The mean and characteristic bending and rolling shear strength of the panels were examined. The results show that the mean bending and rolling shear strength decrease with the panel thickness. The characteristic results have shown that there is an influence because of the number of boards within the panel. The characteristic bending strength values for the five-layer 100 mm thick panel were found to be higher than that of the three-layer 60 mm panel. The characteristic rolling shear values decreased in the five-layer panels, however, the increased number of layers subjected to the rolling shear results in a reduced variability in the rolling shear strength.

Highlights

The construction industry has seen an increased movement towards more sustainable solutions, leading to a requirement for more environmentally friendly, low carbon, thermally insulating, and less labour-intensive materials in the construction of buildings
This study examines the bending and rolling shear strength behaviour of cross laminated timber (CLT) panels and the influence of the panel lay-up on the failure behaviour
This section details the experimental test results for the CLT panels subjected to four-point flexural tests in accordance with EN 16351 [1]

Summary

Introduction

The construction industry has seen an increased movement towards more sustainable solutions, leading to a requirement for more environmentally friendly, low carbon, thermally insulating, and less labour-intensive materials in the construction of buildings. CLT technology was developed in Europe approximately 20 years ago, and is largely responsible for the increase in timber construction throughout the world. The test panel configurations are presented, which gives the number of layers, layer thickness, panel thickness, panel width, and the test span of the panel. The span of the panel was determined from the geometrical constraints outlined in EN 16351 [1]. Shown, eight replicates were tested, giving a total of 48 CLT panels. Thickness of Layer (mm) Panel Thickness Panel Width Span in Bending Test Properties B-3-20

Objectives

Results

Conclusion