test evaluation of blast protective double roof RCC structure

摘要

A RCC double roof structure with an energy absorption layer in-between and having a hand packed boulder overburden of 1.5m designed to withstand the blast effects of a close in detonation was test analysed for the blast protective effectiveness. The paper discusses the behaviour of this structure subjected to intense shock loads generated by detonating HE cylindrical changes at various stand offs from boulder overburden and also at different depth of bursts in the bouilder media. The stresses developed at different points of the structure were monitored using load cells, strain gauges and displacement transducers. The paper also discusses the crack pattern and the damage mechanism of the structure. The role of energy dissipation layer in the two roof structure is highlighted.