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Material Property Uncertainties versus Joint Structural Detailing: Relative Effect on the Seismic Fragility of Reinforced Concrete Frames
| 题名： | Material Property Uncertainties versus Joint Structural Detailing: Relative Effect on the Seismic Fragility of Reinforced Concrete Frames |
| 正文语种： | eng |
| 作者： | Gentile, Roberto;Galasso, Carmine;Pampanin, Stefano |
| 作者单位： | UCL Dept Civil Environm & Geomat Engn Gower St London WC1E 6BT England|UCL Inst Risk & Disaster Reduct Gower St London WC1E 6BT England;UCL Dept Civil Environm & Geomat Engn Gower St London WC1E 6BT England|Ist Univ Studi Super IUSS Piazza Vittoria 15 I-27100 Pavia Italy;Univ Roma La Sapienza Dipartimento Ingn Strutturale & Geotecn Via Eudossiana 18 I-00184 Rome Italy|Univ Canterbury Dept Civil & Nat Resources Engn Christchurch 8041 New Zealand |
| 摘要： | This paper investigates the relative effect of material properties and structural details in the joint panels on the seismic fragility of existing reinforced concrete (RC) frames. Five building classes with different structural details (particularly in the joint panels) and material characteristics are defined according to different past design codes, for a three-story and a six-story archetype geometry. Based on nonlinear static or nonlinear dynamic analysis procedures, results from the study show that the effect of structural details on seismic fragility of the considered structures is negligible for damage states involving an essentially elastic behavior. Conversely, it is much higher for life-safety and near-collapse damage states, and it is considerably higher than the effect due to materials. Therefore, in the diagnosis phase, higher emphasis should be given to on-site investigations of actual reinforcement content/layout rather than to invasive material testing. The uncertainty related to the structural details described here is practically related to exterior, rather than interior, joint panels. Cover removal for one of those joints may potentially eliminate this specific uncertainty. As a practical action, in situ testing of RC frames should involve the cover removal of at least one exterior joint panel regardless of the required target "level of knowledge" of the existing structure. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 4 |
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