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Approximate Modal Analysis of Bilinear MDF Systems Subjected to Earthquake Motions
The study investigated two approximate methods of modal analysis for hysteretic multi-degree-of-freedom lumped mass structural models subjected to earthquakes. The methods were (1) approximate modal analysis using elastic response spectra, and (2) approximate modal analysis using inelastic response spectra. Both modal analysis procedures were iterative and used a perturbation method to successively modify the original elastic mode shapes at each iterative step to reflect yielding in the system. The procedures were developed and evaluated only for shear beam structural systems consisting of members with bilinear hysteresis. Extensive comparisons of exact and approximate responses were made for various 1-, 3- and 10-degree-of-freedom systems. Four existing earthquakes were used, and several structural stiffness and strength parameters were varied. Maximum story displacements were generally predicted within about 5-40 percent accuracy. The equivalent nonlinear approach using inelastic response spectra appeared to give generally better accuracy than the equivalent linear approach using elastic response spectra.
Approximate Modal Analysis of Bilinear MDF Systems Subjected to Earthquake Motions
The study investigated two approximate methods of modal analysis for hysteretic multi-degree-of-freedom lumped mass structural models subjected to earthquakes. The methods were (1) approximate modal analysis using elastic response spectra, and (2) approximate modal analysis using inelastic response spectra. Both modal analysis procedures were iterative and used a perturbation method to successively modify the original elastic mode shapes at each iterative step to reflect yielding in the system. The procedures were developed and evaluated only for shear beam structural systems consisting of members with bilinear hysteresis. Extensive comparisons of exact and approximate responses were made for various 1-, 3- and 10-degree-of-freedom systems. Four existing earthquakes were used, and several structural stiffness and strength parameters were varied. Maximum story displacements were generally predicted within about 5-40 percent accuracy. The equivalent nonlinear approach using inelastic response spectra appeared to give generally better accuracy than the equivalent linear approach using elastic response spectra.
Approximate Modal Analysis of Bilinear MDF Systems Subjected to Earthquake Motions
V. Tansirikongkol (author) / D. A. Pecknold (author)
1978
221 pages
Report
No indication
English
| British Library Online Contents | 2011
Reliability Of Bilinear SDOF Systems Subjected to Earthquake Loading
| Springer Verlag | 2006