Title:
Design of a Spring Isolated Steam Turbine on an Existing Foundation
Author(s):
Ping (Philip) Jiang, Ron McDonel
Publication:
Symposium Paper
Volume:
348
Issue:
Appears on pages(s):
89-105
Keywords:
dynamic analysis, machine foundation, retrofit, seismic, spring isolator
DOI:
10.14359/51732681
Date:
3/1/2021
Abstract:
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.
Related References:
1. CBC 2007, California Building Code 2007
2. ASCE 7-05 Minimum Design Loads for Buildings and Other Structures
3. ACI 318-05, Building Code Requirements for Structural Concrete and Commentary
4. ACI 440.2R-08, Guide for the Design and Construction of Externally Bonded FRP System for Strengthening Concrete Structures
5. ACI 214.4, Guide for Obtaining Cores and Interpreting Compressive Strength Results
6. Newmark, N.M. & W.J. Hall (1982) Earthquake spectra and design. EERI Monograph, Earthquake Engineering Research Institute.