Hysteretic Model Development and Seismic Response of Unbonded Post-Tensioned Precast CFT Segmental Bridge Columns
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Détails bibliographiques
| Auteur(s): |
Chung-Che Chou
Chih-Po Hsu |
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| Médium: | papier de conférence | ||||
| Langue(s): | anglais | ||||
| Conférence: | IABSE Symposium: Improving Infrastructure Worldwide, Weimar, Germany, 19-21 September 2007 | ||||
| Publié dans: | IABSE Symposium Weimar 2007 | ||||
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| Page(s): | 460-461 | ||||
| Nombre total de pages (du PDF): | 8 | ||||
| Année: | 2007 | ||||
| DOI: | 10.2749/weimar.2007.0570 | ||||
| Abstrait: |
The aim of this research was to investigate experimentally the durability of the unbonded posttensioned, precast concrete-filled tube (CFT) segmental bridge columns subjected twice to cyclic loading. In addition, a stiffness degrading flag shaped (SDFS) model was developed based on selfcentering capability and stiffness degradation of the columns. The SDFS model overcomes the deficiency of prediction using a flag shaped (FS) mode, which self-centers with constant stiffness. The experimental and analytical results show that (1) the deformation of the column in two tests is similar but energy dissipation of that is significantly reduced in the second test, and (2) the SDFS model can predict the cyclic response of the column better than that using the FS model. A parametric study, performed on systems subjected to earthquake records, shows that increase of displacement ductility is significant for structures with low period and medium yield strength ratio. |
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