Elasto-Plastic Finite Element Analysis of Long-Lived Seismic Ties for Thermal Power Boiler Structure

Abstract

This paper deals with the modification of recently developed steel seismic ties, which are energy absorbing devices installed between a boiler and its support structure. To enhance the aseismic reliability of the boiler and its support structure for recently increased specified earthquake loads, the useful live of the seismic ties must be prolonged. To achieve this, changes to the sectional shapes of the seismic ties have been analyzed and designed with the help of elasto-plastic finite element analysis.