Blast test and numerical simulation of point-supported laminated glass curtain wall

摘要

To investigate the blast resistance of point-supported laminated glass curtain wall, 9 site blastrntestswere carried out, considering 2 types of glass thickness and 6 differentTNTcharges from 0.4 kg to 30 kg.Thernoverpressure and displacement were measured and the failure mode was observed. The tests demonstrated thatrnthe overpressure suddenly increased and quickly decayed within a few milliseconds; the displacement responsernof the glass curtain wall increased with the increase in TNT charge and decreases with the increase of the glassrnthickness; the final failure mode was featured by tearing off of PVB at the support of the laminated glass panelrnwhile the glass shards still adhered to the PVB. Nonlinear dynamic finite element simulation agrees well withrnthe results from the blast tests. Severe stress concentration has been predicted at the rim of the support holes andrnleads to the failure at these supports, and this also agrees with the failure mode observed from the blast test.