Inelastic Responses of Two-Way Asymmetric-Plan Structures under Bidirectional Ground Excitations—Part II: Response Spectra | Zendy

Lin Jui-Liang | Zendy; Yang Wen-Chia | Zendy; Tsai Keh-Chyuan | Zendy

Open Access

Inelastic Responses of Two-Way Asymmetric-Plan Structures under Bidirectional Ground Excitations—Part II: Response Spectra

Author(s) -

Lin Jui-Liang,

Yang Wen-Chia,

Tsai Keh-Chyuan

Publication year - 2012

Publication title -

earthquake spectra

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.134

H-Index - 92

eISSN - 1944-8201

pISSN - 8755-2930

DOI - 10.1193/1.3672426

Subject(s) - spectral line , modal , translation (biology) , constant (computer programming) , structural engineering , rotation (mathematics) , ductility (earth science) , vibration , nonlinear system , enhanced data rates for gsm evolution , physics , mathematics , engineering , geometry , materials science , computer science , acoustics , chemistry , creep , quantum mechanics , thermodynamics , telecommunications , biochemistry , messenger rna , polymer chemistry , gene , programming language

Based on the studies in the companion paper, this paper presents the inelastic response spectra for asymmetrical structures (SAS) under bidirectional ground excitations. Firstly, the constant-strength SAS were constructed and compared with the corresponding conventional constant-strength response spectra. It was found that the modal ductility demands of an asymmetric-plan structure could be significantly overestimated from the conventional constant-strength response spectra as the nonlinear “modal” rotation and translations may not be proportional. Furthermore, the translation-rotation interaction effect is not considered in the conventional constant-strength response spectra. Secondly, the influences of the three-degree-of-freedom (3DOF) modal parameters on the ductility demand were extensively studied. Thirdly, the normalized peak edge translation spectra were also investigated. It was found that the normalized peak edge translation resulting from a single vibration mode may be overestimated twofold by using the single-degree-of-freedom (SDOF) modal systems.

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