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Title: Design of a Spring Isolated Steam Turbine on an Existing Foundation

Author(s): Ping (Philip) Jiang, Ron McDonel

Publication: Symposium Paper

Volume: 348


Appears on pages(s): 89-105

Keywords: dynamic analysis, machine foundation, retrofit, seismic, spring isolator

DOI: 10.14359/51732681

Date: 3/1/2021

A more than 50-year old Steam Turbine/Generator (STG) table-top concrete foundation was retrofitted to support a new STG/Condenser unit. This new machine unit is set on a sub skid with spring/damper assemblies underneath and located on existing concrete table top columns. This paper presents a case study of the seismic design and evaluations of the existing foundation structure that were performed to assess and qualify the structure’s service and strength capabilities. Based on these evaluations, modifications to the existing STG foundation were minimized allowing the cost effective reuse of the existing foundation resulting in significant savings for the overall installed cost of the project.