| 英文摘要 |
This paper studies the reasons behind four trends in torsional effects in asymmetrical buildings observed in recent literature. It is found that modal eccentricities and the non-proportionality between the modal translations and the modal rotation are key to understanding these trends in torsional effects in asymmetrical buildings. The non-proportionality between the modal translations and the modal rotation leads to the trend that the torsional effects generally decrease when plastic deformations increase. This study also proposes a novel oscillator, referred to as the co-shape oscillator(COSO), which can be effectively used in the nonlinear response history analysis of multistory asymmetrical buildings. For accuracy and simplicity, the incremental dynamic analysis with the use of COSOs, instead of pushover analysis, is proposed for the simplified seismic analyses of asymmetrical buildings. |
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