Performance-based approaches utilizing nonlinear analyses have become increasingly popular for seismic evaluation of buildings. Nonlinear simulations of building response require various assumptions and modeling decisions—from choice of software to model parameters—which opens the door to differences in demand assessments from what essentially could be very similar computational models. This study examines nonlinear response sensitivity of three steel moment frame structures to variations in basic nonlinear modeling parameters using three different software platforms: OpenSees, Perform-3D, and SAP2000. The building models were analyzed in the inelastic range using a suite of near-fault and far-fault ground motions, and response sensitivity was assessed using interstory drift and plastic rotation demands. Findings from the study indicate that sensitivity to modeling assumptions and choice of software are more pronounced at the local/element level than at the global/system level and can have an impact in performance-based seismic assessment.
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May 01, 2018
Consequences of Modeling Choices in Seismic Performance Assessment of Buildings
Daniel J. Swensen
;
Daniel J. Swensen
a
Strong Motion Instrumentation Program, California Geological Survey, Sacramento, CA 95814
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Sashi K. Kunnath, M. EERI
Sashi K. Kunnath, M. EERI
b
Civil & Environmental Engineering, University of California, Davis, CA 95616
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Earthquake Spectra (2018) 34 (2): 423–440.
Article history
received:
02 Mar 2017
accepted:
09 Nov 2017
first online:
01 Jun 2020
Citation
Daniel J. Swensen, Sashi K. Kunnath; Consequences of Modeling Choices in Seismic Performance Assessment of Buildings. Earthquake Spectra 2018;; 34 (2): 423–440. doi: https://doi.org/10.1193/030217EQS044EP
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Index Terms/Descriptors
- accelerograms
- amplitude
- attenuation
- buildings
- California
- computer programs
- concrete
- construction materials
- Contra Costa County California
- data processing
- earthquakes
- elastic waves
- elasticity
- engineering properties
- faults
- Fourier analysis
- ground motion
- models
- numerical models
- risk assessment
- seismic waves
- simulation
- spectra
- spectral analysis
- steel
- stiffness
- strong motion
- two-dimensional models
- United States
- yield strength
- Fremont California
- Richmond California
- Aliso Viejo California
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