Cálculo simplificado de vidrio laminado: determinación de desplazamientos en vigas y placas ante cargas estáticas utilizando modelos monolíticos

Abstract

In the calculation of laminated glass elements, glass layers are commonly considered as linear-elastic whereas the polymeric interlayers present viscoelastic behavior. Consequently, the mechanical behavior of laminated glass elements depends on time and temperature. Many finite elements are needed to calculate these elements because the thickness of the glass layers (and above all that of polymeric interlayers) are much smaller than the other two dimensions of the element (with and length). For this reason, the calculation of these elements is very high time consuming. Recently, several authors have proposed the effective stiffness concept (alternatively effective thickness or effective Young's modulus) for the simplified calculation of laminated glass elements. In this work, a methodology is proposed to predict the deflection of laminated beams and plates under static loadings using a linear elastic monolithic model (analytical or numerical) and the equations of the effective stiffness for the laminated glass. The equations proposed in this work have been validated by experimental tests carried out in simply-supported beams and in a plate supported at the four corners, the maximum error being less than 10%.