Abstract
Cross-laminated timber is a structural material, which successfully used for structural purposes during the last years. The material is environmentally friendly and decreases CO2 emissions. Cross-laminated timber possesses a decreased level of anisotropy in comparison with solid and glued timber. It is significant for structural units working in bending. So, cross-laminated timber panels are considered as an object of investigation. Design methodology for cross-laminated timber panels subjected to flexure was presented. The methodology is based on LVS EN1995-1-1 and laminated plate theory. The presented methodology was tested experimentally and analytically. Behavior and mechanical properties of cross-laminated timber are analyzed for case of static loading. Two panels with thickness 95mm consisting from three layers were tested in laboratory. Freely supported panels with span equal to 2m, which is loaded by the uniformly distributed load was a design scheme of considered panels. The panel’s width was equal to 1m. Analytical FEM design method, which is based on the using of computational program ANSYSv14 and RFEM5.0, was checked by the experiment. The comparison of stresses acting in the edge fibers and vertical displacements shows that the considered design methodology can be used for engineering calculations. The result difference changes in limits to 30%. DOI: http://dx.doi.org/10.5755/j01.sace.9.4.7450
Highlights
Journal of Sustainable Architecture and Civil EngineeringDesign Methodology Analysis of CrossLaminated Timber Elements Subjected to Flexure
Timber as a structural material is environmentally friendly in relation to bio-recovery and with minimal resources for providing it
If fibers of each second layer will be oriented perpendicular to the fibers direction of the first layer, we will get orthotropic material
Summary
Design Methodology Analysis of CrossLaminated Timber Elements Subjected to Flexure. Result difference for cross and parallel laminated timber plates – load bearing capacity, horizontal displacement and deflection varies up to 10%, it can be concluded that the middle layer does not give a significant effect on the load – bearing capacity loss. Finite element program for the calculation of accurate results in comparison with the calculation methodology showed RFEM5.0 program with differences up to 10% and 15%The program ANSYS up to 15%. Comparison of results between cross and parallel laminated timber in relative deformations, the difference is up to 6%. The cross – laminated timber middle layer does not affect load – bearing capacity. The middle layer decreases only 10 % of load – bearing capacity
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