Seismic behaviour of RC columns with lap-spliced crossties under various axial loads
| Autor: | Tai-Kuang Lee, Cheng-Cheng Chen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hook business.industry 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Rc columns 0201 civil engineering Structural load 021105 building & construction General Materials Science business Reinforcement Civil and Structural Engineering |
| Zdroj: | Magazine of Concrete Research. 72:278-291 |
| ISSN: | 1751-763X 0024-9831 |
| DOI: | 10.1680/jmacr.18.00369 |
| Popis: | Lap-spliced crossties are formed from the lap splicing of two J-shaped reinforcement bars (rebars) with a 180° hook on one end and a straight end on the other. In this study, cyclic lateral load testing of four large-scale reinforced-concrete (RC) column specimens was performed. Moreover, the integrity of lap-spliced crossties and the seismic performance of RC columns with lap-spliced crossties under various axial load ratios were examined. The results indicated the following. (i) Under various axial load ratios, column specimens with lap-spliced crossties were verified to possess favourable seismic performance and effectiveness in confining the concrete core. (ii) For all specimens with lap-spliced crossties, the straight ends of the J-shaped reinforcement bars did not slide toward the column interior. This indicated that the two J-shaped reinforcement bars were effectively combined into a crosstie with 180° hooks on both ends. (iii) Compared to conventional crossties, lap-spliced crossties are not only easier to install but also more effective in confining core concrete since lap-spliced crossties possess two effective seismic hooks while conventional crossties possess just one. |
| Databáze: | OpenAIRE |
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