Modal-pushover-based ground-motion scaling procedure

Journal of Structural Engineering
By:  and 

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Abstract

Earthquake engineering is increasingly using nonlinear response history analysis (RHA) to demonstrate the performance of structures. This rigorous method of analysis requires selection and scaling of ground motions appropriate to design hazard levels. This paper presents a modal-pushover-based scaling (MPS) procedure to scale ground motions for use in a nonlinear RHA of buildings. In the MPS method, the ground motions are scaled to match to a specified tolerance, a target value of the inelastic deformation of the first-mode inelastic single-degree-of-freedom (SDF) system whose properties are determined by the first-mode pushover analysis. Appropriate for first-mode dominated structures, this approach is extended for structures with significant contributions of higher modes by considering elastic deformation of second-mode SDF systems in selecting a subset of the scaled ground motions. Based on results presented for three actual buildings-4, 6, and 13-story-the accuracy and efficiency of the MPS procedure are established and its superiority over the ASCE/SEI 7-05 scaling procedure is demonstrated.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Modal-pushover-based ground-motion scaling procedure
Series title Journal of Structural Engineering
DOI 10.1061/(ASCE)ST.1943-541X.0000308
Volume 137
Issue 3
Year Published 2011
Language English
Publisher American Society of Civil Engineers
Publisher location Reston, VA
Contributing office(s) Earthquake Science Center
Description 13 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Structural Engineering
First page 298
Last page 310