原文传递
Axial load behavior of reinforced concrete columns with high-strength steel coiled strips as confinement
| 题名： | Axial load behavior of reinforced concrete columns with high-strength steel coiled strips as confinement |
| 正文语种： | eng |
| 作者： | Steven M. Barbachyn;Anne O'Donnell;Ashley P. Thrall;Yahya C. Kurama |
| 作者单位： | Additive Manufacturing Organization at GE Renewable Energy;Latham & Watkins LLP;Department of Civil and Environmental Engineering and Earth Sciences at the University of Notre Dame;University of Notre Dame |
| 关键词： | Axial load; column; confinement; high-strength steel; reinforced concrete column; strip reinforcement |
| 摘要： | This paper experimentally investigates the axial load behavior of square reinforced concrete columns confined using dual-phase high-strength (100 ksi [690 MPa] yield strength) steel coiled strips. Two phases of testing were conducted on reduced-scale specimens (8 × 8 in. and 10 × 10 in. [203 × 203 mm and 254 × 254 mm]). Varied parameters include confinement type (strip versus reinforcing bar), confinement reinforcement ratio, confinement layout (hoops and ties, single spiral, two spirals), and strip anchorage. Although the reinforcing-bar-confined columns demonstrated better postpeak residual strength and ductility, important findings include the following: strip-confined columns had peak strengths exceeding the nominal axial strength predicted by code, strip-confined columns were able to achieve similar normalized peak strengths and prepeak stiffness as columns with reinforcing bar hoop confinement, two strip spirals are necessary to achieve the desired postpeak residual strength and ductility for an eight-bar layout, and strip spirals and hoops may provide better restraint against buckling of corner bars compared with reinforcing bar hoops. |
| 出版年： | 2023 |
| 期刊名称： | PCI Journal |
| 卷： | 68 |
| 期： | 5 |
| 页码： | 21-41 |
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