Experimental Analysis of the Influence of Openings in the Deflection of Cross-Laminated Timber Plates Loaded Out of Plane

Abstract

This paper presents a series of experimental tests that were conducted to investigate the effect of openings on the deformation of cross laminated timber (CLT) floor panels. A comparison is made between the tests results and different FE shell models and simplified beam models developed for prediction. The research aims to provide new design criteria and user-friendly models to enhance the predictability of CLT structures and increase its versatility as a building material.

Cross-Laminated Timber Floors With Openings - Serviceability Limit State Verifications

“…An extended opening width of 600 mm x 300 mm lead to a further decrease of the mean value of the fundamental frequency to 25,1 Hz and thus by 8,4 % compared to the condition without opening. For an in-depth view into the determination of values according to EN 384 [16], destructive test-results and further test-set ups, their execution and evaluation see the companion paper [8].…”

“…Figure 12 shows the considered models: (A) modelling of each individual lamination as 2D Timoshenko-beam element, (B) modelling as a multi-layered structure with shell elements and (C) modelling as an equivalent single layered shell element with adjusted material values. For the discussion of further structural models of CLT elements with openings, see [8]. For an overview of the advantages and disadvantages of the investigated model types (A) -(C), see [15].…”

“…The influence of openings was investigated for two sizes of openings, see Figure 2 and Figure 3. The test results, presented in Chapter 2 and in the companion paper [8], not only gave an insight into the structural behaviour of the system, but also provided data that has been used for the calibration of a numerical model, see Chapter 3, followed by a parametrized 5 José Manuel Cabrero, UNAV University of Navarra, Spain, jcabrero@unav.es 6 Stefan Winter, TUM Technical University of Munich, Germany, winter@tum.de x y z numerical study on the influence of openings on deformations and frequencies in the system, see Chapter 4.…”

“…The influence of openings was investigated for two sizes of openings, see Figure2and Figure3. The test results, presented in Chapter 2 and in the companion paper[8], not only gave an insight into the structural behaviour of the system, but also provided data that has been used for the calibration of a numerical model, see Chapter 3, followed by a parametrized…”