Impact of Sunlight on the Durability of Laminated Glass Panes

In this paper the consequences of solar radiation on the be-havior of laminated glass with PVB interlayer are experimen-tally evaluated. The experimental campaign reported is based on the repetition of four point bending tests in creep con-dition, on laminated glass beams while subjected to increas-ing exposition time to artificial solar radiation. In so do-ing, bending test in creep condition is used as a not de-structive test to highlight the modification of interlayer coupling capability and the scattering of results due to specimens variability is avoided. The constitutive relations of material, based on linear viscosity and thermo-rheological simplicity, are calibrated on previous experi-ments in order to reproduce the behavior of blank specimens at different temperatures. The possibility of determining some damage parameters that account for the modification at-tained by interlayer while exposed to solar radiation, is investigated.