Post-cracked behavior of laminated glass

![CDATA[Laminated glass is a common component used to enhance the safety performance of building facades particularly when subjected to impact and blast. The visco-elastic properties of the polyvinyl butyral (PVB) interlayer, provides significant post-cracked load capacity of laminated glass. However, due to the uncertainties in the post-cracked residual capacity, the design of laminated glass is often limited to elastic range. This paper presents the findings from a series of water-bag tests of laminated glass plate, which lead to a better understanding of the post-cracked behaviour of laminated glass. Several key parameters such as the relative failure displacement and the effect of glass fragmentation on the shape factor of the PVB membrane were established, whilst the stiffening effect of glass fragmentation on PVB membranes were briefly discussed. The key parameters enable the use of simple dynamic analysis tool such Single Degree of Freedom (SDOF) approach or Multi Degree of Freedom (MDOF) approach to determine the post-crack behaviour of laminated glass panels.]]