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- Title
Evaluation of predictors of non-linear seismic demands using fishbone models of SMRF buildings.
- Authors
Nicolas Luco; Yasuhiro Mori; Yosuke Funahashi; C. Allin Cornell; Masayoshi Nakashima
- Abstract
Predictors (or estimates) of seismic structural demands that are less computationally time-consuming than non-linear dynamic analysis can be useful for structural performance assessment and for design. In this paper, we evaluate the bias and precision of predictors that make use of, at most, (i) elastic modal vibration properties of the given structure, (ii) the results of a non-linear static pushover analysis of the structure, and (iii) elastic and inelastic single-degree-of-freedom time-history analyses for the specified ground motion record. The main predictor of interest is an extension of first-mode elastic spectral acceleration that additionally takes into account both the second-mode contribution to (elastic) structural response and the effects of inelasticity. This predictor is evaluated with respect to non-linear dynamic analysis results for fishbone models of steel moment-resisting frame (SMRF) buildings. The relatively small number of degrees of freedom for each fishbone model allows us to consider several short-to-long period buildings and numerous near- and far-field earthquake ground motions of interest in both Japan and the U.S. Before doing so, though, we verify that estimates of the bias and precision of the predictor obtained using fishbone models are effectively equivalent to those based on typical full-frame models of the same buildings. Copyright © 2003 John Wiley & Sons, Ltd.
- Subjects
SEISMOLOGY; GEOPHYSICS; DYNAMICS; STEEL framing; STRUCTURAL steel
- Publication
Earthquake Engineering & Structural Dynamics, 2003, Vol 32, Issue 14, p2267
- ISSN
0098-8847
- Publication type
Article
- DOI
10.1002/eqe.331