Seismic Performance Evaluation of the Highway N High-Voltage Substation


In this study, the Highway N Substation in Missouri was studied with finite element method for its vulnerability under seismic loading. The component of the substation system was modeled with due considerations of mass, stiffness and geometries. Full-scale shake table experiments were carried out on three electric switches to partially validate the finite element model (FEM). After a systematical modal analysis based on the FEM, response spectrum analyses were performed to characterize the dynamic behavior of 'rigid' buses and switches of the structure. In time-history analysis, two methods were employed to generate the seismic motions: 1) site-specific synthetic ground motion and 2) spectrum compatible ground motion. The results from both ground motions were analyzed and the magnitude and location of the maximum moments in each case were identified. The effect of slip joints on switches was examined and the maximum relative displacement under the seismic loads was identified.


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Finite Element Model; Power Substation; Seismic Excitation; Shake Table Test; Earthquake Effects; Electric Substations; Electric Switches; Modal Analysis; Rigid Structures; Seismic Design; Seismology; Spectrum Analysis; High Voltage Substations; Maximum Relative Displacements; Power Substations; Response Spectrum Analysis; Seismic Excitations; Seismic Performance Evaluation; Synthetic Ground Motions; Finite Element Method

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2015 Korean Society of Steel Construction, All rights reserved.

Publication Date

01 Mar 2015