Modal Pushover-Based Scaling of Two Components of Ground Motion Records for Nonlinear RHA of Structures

The modal-pushover-based-scaling (MPS) procedure, currently restricted to scale one component of ground motion records, is extended herein to scale two horizontal components. The accuracy and efficiency of the MPS procedure is evaluated here by applying it to an existing nine-story building, symmetric in plan. The computer model developed for the building is validated against motions of the building recorded during the Chino Hills earthquake (2008). It is demonstrated that nonlinear response history analysis (RHA) of the building for a small set of records scaled by the MPS procedure provided a highly accurate estimate of the engineering demand parameters (EDPs), accompanied by significantly reduced record-to-record variability of the responses. Furthermore, the MPS procedure is shown to be much superior to the procedure specified in the ASCE/SEI 7-05 standard for scaling two components of ground motion records.

[1]  Nicolas Luco,et al.  Structure-Specific Scalar Intensity Measures for Near-Source and Ordinary Earthquake Ground Motions , 2007 .

[2]  C. Allin Cornell,et al.  Earthquakes, Records, and Nonlinear Responses , 1998 .

[3]  Farzad Naeim,et al.  Selection and Scaling of Ground Motion Time Histories for Structural Design Using Genetic Algorithms , 2004 .

[4]  R. P. Kennedy,et al.  Engineering characterization of ground motion. Task I. Effects of characteristics of free-field motion on structural response , 1984 .

[5]  C. Allin Cornell,et al.  Structural performance assessment under near‐source pulse‐like ground motions using advanced ground motion intensity measures , 2008 .

[6]  Anil K. Chopra,et al.  Practical guidelines to select and scale earthquake records for nonlinear response history analysis of structures , 2010 .

[7]  J. Baker,et al.  Spectral shape, epsilon and record selection , 2006 .

[8]  D. Giraldo,et al.  Modal Identification through Ambient Vibration: Comparative Study , 2009 .

[9]  Juan C. Reyes,et al.  Estimating Seismic Demands for Performance-Based Engineering of Buildings , 2009 .

[10]  Farzad Naeim,et al.  Dynamics of Structures—Theory and Applications to Earthquake Engineering, Third Edition , 2007 .

[11]  Anil K. Chopra,et al.  A modal pushover analysis procedure to estimate seismic demands for unsymmetric‐plan buildings , 2004 .

[12]  C. Allin Cornell,et al.  Probabilistic seismic demand analysis of nonlinear structures , 1999 .

[13]  P. Malhotra.  Strong-Motion Records for Site-Specific Analysis , 2003 .

[14]  Julian J. Bommer,et al.  Selection and Scaling of Real Accelerograms for Bi-Directional Loading: A Review of Current Practice and Code Provisions , 2007 .

[15]  Gang Wang,et al.  Design Ground Motion Library (DGML) – Tool for Selecting Time History Records for Specific Engineering Applications (Abstract) , 2007 .

[16]  Paolo Bazzurro,et al.  Probabilistic seismic demand analysis , 1998 .

[17]  Babak Alavi,et al.  Behavior of moment‐resisting frame structures subjected to near‐fault ground motions , 2004 .

[18]  Helmut Krawinkler,et al.  CONSIDERATION OF NEAR-FAULT GROUND MOTION EFFECTS IN SEISMIC DESIGN , 2000 .

[19]  W. J. Hall,et al.  Scaling Methods for Earthquake Response Spectra , 1984 .

[20]  Anil K. Chopra,et al.  Dynamics of Structures: Theory and Applications to Earthquake Engineering , 1995 .

[21]  Kenneth T. Farrow,et al.  Ground motion scaling methods for different site conditions and structure characteristics , 2003 .

[22]  Anil K. Chopra,et al.  Evaluation of Modal Pushover–Based Scaling of One Component of Ground Motion: Tall Buildings , 2012 .

[23]  Edward Cohen,et al.  Minimum Design Loads for Buildings and Other Structures , 1990 .

[24]  B. Moor,et al.  Subspace identification for linear systems , 1996 .