Proof Test of Anti-Vibration Effect Due to Elasto-Plastic Joint Elements of Actual Boiler Structures

Seismic ties are connecting devices installed between boiler and it's supporting structure in thermal power plants. The seismic ties are made of steel and allowed to be used in the elasto-plastic deformation region in order to reduce the seismic response of the boiler structure. This paper deals with proof test of anti-vibration effect due to the elasto-plastic bahavior of the seismic ties using scaled boiler structure model, which has scaled seismic tie models as large as possible, on a large shaking table. We developed "Dual Mass Approximation Method" for the boiler structure in order to design it's scaled model.