Dynamic theory of blast-loaded local-resonance-based metaconcrete slabs and experimental validations

Abstract

In this research, dynamic responses of local-resonance-based metaconcrete slabs were investigated theoretically and experimentally. Mechanical models of metaconcrete slab and mass-coating resonator were proposed and governing equations were built by expanding the Timoshenko beam theory. Dynamic responses were solved by the method of separation of variables and series functions of displacements. Displacement reduction and attenuation with time induced by the metastructure were revealed theoretically. The theory was validated by explosion experiments of metaconcrete slabs. The experimental results and parameter analyses indicate that compared with common concrete slabs, the metaconcrete slabs have significant displacement attenuation and vibration reduction abilities under blast loading.