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Seismic Performance of Circular Concrete Columns Reinforced with High-Strength Steel
| 题名： | Seismic Performance of Circular Concrete Columns Reinforced with High-Strength Steel |
| 正文语种： | 英文 |
| 作者： | Leo Barcley;Mervyn Kowalsky |
| 作者单位： | Kimley Hom and Associates;North Carolina State Vniv |
| 关键词： | Reinforced concrete; High-strength steel; Seismic design; Performance-based design; Critical bending strain. |
| 摘要： | In modem seismic design of reinforced concrete structures, areas designed to form plastic hinges are reinforced with ASTM A706 steel because of its ability to sustain large elongations, as well as its tightly controlled specifications on yield and ultimate strength. The A706 standard now includes reinforcing steel with a nominal yield strength of 550 MPa (80 ksi), but its use in seismic applications is limited given the lack of experimental data on its behavior in members forming plastic hin ges .In this paper, the results of four circular Grade 80 (550) reinforced columns tested under reverse cyclic loading are discussed and compared with companion Grade 60 (420) reinforced columns. The results showed that columns reinforced with Grade 80 (550) steel exhibited rebar fracture at lower levels of column deformation, although the onset of bar buckling, plastic hinge lengths, and cnergy dissipation were similar to columns reinforced with Grade 60 (420) steel. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.02 |
| 页码： | 04019198 |
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