Research Article
Experimental Research on Axial Compression of Reinforced Concrete Short Circular Columns Strengthened with Prestressed Semicircular Steel Plates
Table 2
Main results of the test.
| | Number | Nu (kN) | Increase rate (%) | Failure mode |
| | RC-1 | 1 | 1471.50 | — | Cover concrete spalling, concrete crushing, upper column drumming | | 2 | 1553.30 | — | | 3 | 1548.53 | — | | 4 | 1612.32 | — | | 5 | 1526.23 | — |
| | RC-2-1 | 1 | 2654.89 | 72.1 | Concrete cracking, no obvious phenomenon in the steel casing | | 2 | 2910.25 | 88.7 | | 3 | 2967.48 | 92.4 | | 4 | 2938.08 | 90.5 | | 5 | 2781.00 | 80.3 |
| | RC-2-2 | 1 | 3017.00 | 95.6 | Vertical flange weld cracking, concrete splitting | | 2 | 3008.29 | 95.0 | | 3 | 3026.02 | 96.2 | | 4 | 3110.64 | 101.7 | | 5 | 3125.31 | 102.7 |
| | RC-2-3 | 1 | 3133.54 | 103.2 | Bolt fracture, steel casing failure | | 2 | 3146.81 | 104.0 | | 3 | 3046.87 | 97.5 | | 4 | 3237.70 | 109.9 | | 5 | 3304.70 | 114.3 |
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