Numerical Versus Simplified Analytical Approach for Prediction of Flexural Strength in LG Beams

Abstract

Abstract-Flexural behavior of laminated glass beams was numerically predicted through an open source finite element code; a cohesive-frictional behaviour of the adhesive and the brittle fracture of the glass were implemented though adequate constitutive laws. Both the processes of de-bonding of interlayer and the failure of glass panels can be captured by a refined finite element analysis. Based on the elastic theory, simple analytical expressions are utilized for the prediction of composite glass beams, including the extreme cases of full composite and layered behaviour. Cases of study refer to glass composite beams having T or I cross-section shapes. Beams consist of laminated glass (LG) flanges and LG web that is assembled together by different kinds of polymer adhesive (semi-rigid i.e., silicones, modified silicones and polyurethanes and rigid i.e., epoxy resins, acrylics). Experimental data given in the literature was utilized to show the effectiveness of numerical model to reproduce experimental results, and to show the effectiveness of the proposed elastic model for preliminary beams in flexure design.