[ ACOUSTIC METAMATERIALS FROM MARATHON ALLIANCE ]
Marathon Alliance produces a broad range of the acoustic metamaterials, specially developed for filling in both vertical barriers and seismic pads.
The seismic barriers with acoustic metamaterials resemble broadband phononic crystals allowing for dissipation of the wave energy at the broadband frequency range, starting from 2 to 35Hz, as demanded in nuclear power industry, or in a narrower range from 2 to 10 Hz as required in civil engineering.
The mathematical model for the Marathon Alliance acoustic metamaterials rests upon combination of two approaches (1) the hyperplastic models for the metamaterial, and (2) the modified Cam-Clay plasticity model. Both these models have been extensively studied for finding the desired mechanical parameters ensuring optimal wave energy dissipation.
The use of acoustic metamaterials from Marathon Alliance ensures higher reduction ratio for magnitudes of all types of seismic waves comparing with more traditional solid & elastic fillers.
[ EUROCODE & AUSTRALIAN STANDARDS ]
The recent Eurocode 7: Geotechnical Design, Eurocode 8: Design of structures for earthquake resistance and Australian Standard 1170-4: Earthquake actions in Australia outline requirements for design of the structures, including civil constructions, bridges and high-risk structures.
The basis of the design requirements stipulated in the standards is based on the structural assessment of the structures, their joints and components against inertial seismic loads.
Eurocode and the Australian standards operate with two general methods for assessment of the structural integrity of the constructions: Earthquake Response Spectrum Method (ERSM) and Time Domain Analysis (TDA). Both methods utilize the recorded data from the previous earthquakes as a basis for the applied external inertial loads.
The seismic protective solutions delivered by Marathon Seismic reduce inertial loads in the structure due to dissipation and scattering of the seismic wave energy.