Embedment and Shear Strengths of Cross Laminated Timber and Their Dependence on Angular Orientation

Abstract

In order to evaluate the dependence of angular orientation of Cross Laminated Timber (CLT) in terms of embedment and shear strengths, we derived a prediction formula and compared it with experimental results. The assumptions used in the formula based on independence of each layer are : (a) For embedment of circular steel bar against the CLT, the total embedment strength is the average strength of each layer. (b) Embedment strength of a layer inclined to the loading direction is expressed by Hankinson's formula. (c) For shear strength of CLT, either vertical compression or shear failure along the grain occurs in each layer. (d) The total shear strength is also the average of the strength of each layer. Evaluated strength to angle relationship tended to correspond with test results, although estimated values were lower than actual test results.