原文传递
Experimental Performance Assessment of Nearly Full-Scale Reinforced Concrete Columns with Partially Debonded Longitudinal Reinforcement
| 题名： | Experimental Performance Assessment of Nearly Full-Scale Reinforced Concrete Columns with Partially Debonded Longitudinal Reinforcement |
| 正文语种： | 英文 |
| 作者： | M. T. Nikoukalam, S.M.ASCE;P. Sideris, A.M.ASCE |
| 作者单位： | Univ, of Colorado Boulder |
| 关键词： | Reinforced concrete column; Large-scale testing; Debonded rebar; Damping; Energy dissipation; Concrete damage; Seismic effects. |
| 摘要： | This paper presents an experimental study investigating the effect of partial debonding of longitudinal reinforcement at the location of the plastic hinge on the performance of reinforced concrete columns in special moment-resisting frames designed for seismic regions as per standard guidelines. Partial debonding is investigated as a means of spreading locally induced deformations over larger rebar lengths, thereby preventing early rebar yielding and fracture and improving the seismic performanee of the columns. The experimental program, which was conducted at the University of Colorado Boulder, included quasi-static cyclic testing of three nearly full-scale (〜1:1.14 or 〜88%) cantilever columns with various debonded reinforcement lengths. The experimental findings showed that reinforcement debonding resulted in early onset of concrete cracking and delayed reinforcement yielding. Spreading of concrete damage decreased with the debonded length, not exceeding half of the plastic hinge length (as opposed to the full plastic hinge length for bonded reinforcement). Debonding alleviated strain localizations in the steel reinforcement, at least, for drift ratios below 2%. The peak strength and initial elastic stiffness decreased with the debonded length. Energy dissipation and equivalent viscous damping ratio increased with the debonded length for drift ratios below 2%, and decreased with the debonded length for drift ratios exceeding 3%. Self-centering improved with the deb on ded length. DOI: 10.106l/(ASCE)ST.1943-541X.0001708. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.04 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.04 |
| 页码： | 04016218 |
相关文献
- Experimental background behind new AASHTO LRFD specifications for partially debonded strands
- Experimental background behind new AASHTO LRFD specifications for partially debonded strands
- Experimental background behind new AASHTO LRFD specifications for partially debonded strands
- Confinement Model for Concrete Columns Internally Confined with Carbon FRP Spirals and Hoops
- Experimental and Numerical Studies of Reinforced Concrete Columns Confined by Circular Steel Tubes Exposed to Fire
- Seismic Collapse Performance of a Full-Scale Concrete Building with Lightly Reinforced Columns
检索历史
应用推荐
