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Flexural Strengthening of Columns with CFRP Composites and Stainless Steel: Cyclic Behavior
| 题名： | Flexural Strengthening of Columns with CFRP Composites and Stainless Steel: Cyclic Behavior |
| 正文语种： | 英文 |
| 作者： | Pedro Faustino;Carlos Chastre |
| 作者单位： | Universidade NOVA de Lisboa, Lisbon |
| 关键词： | Carbon-fiber-reinforced polymer (CFRP) jacket; CFRP laminates; Confinement; Cyclic behavior; Longitudinal strengthening; Reinforced concrete columns; Seismic behavior; Stainless steel; Concrete and masonry structures. |
| 摘要： | This study presents the testing, completion, and analysis of different external strengthening systems applied to rectangular reinforced concrete columns with rounded comers. The experimental study included confinement strengthening with carbon-fiber-reinforced polymer (CFRP) sheets, longitudinal strengthening with CFRP laminates and confining CFRP jacket, longitudinal strengthening with stainless steel bars and confining CFRP jacket, tested column until reinforcing steel failure, repair and CFRP confining jacket, and longitudinal strengthening with stainless steel bars. The analysis of the experimental results included lateral load-displacement re-latio ns hip, energy dissipation, ductility, and curvature damage assessment classifications. It was concluded that the use of external longitudinal strengthening combined with CFRP confinement is effective for enhancing performance and is viable in terms of execution. The load capacity increase due to strengthening reached 36-46% with good ductile behavior (failure was reached at 4.4% drift ratio). Despite some differences between CFRP laminates and stainless steel, all columns presented moderate degrees of damage between 1 and 2% drift ratio and minor damage degree until 1% drift ratio. DOI: 10.106l/(ASCE)ST.1943-541X.0001400. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.02 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.02 |
| 页码： | 04015136 |
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