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Punching Shear Resistance of Corroded Slab–Column Connections Subjected to Eccentric Load
| 题名： | Punching Shear Resistance of Corroded Slab–Column Connections Subjected to Eccentric Load |
| 正文语种： | eng |
| 作者： | Yun-Hao Weng;Feng Fu;Kai Qian |
| 作者单位： | Guilin Univ. of Technology;Univ. of London;Guilin Univ. of Technology |
| 关键词： | Punching shear resistance;Reinforced concrete slab–column connection;Accelerated corrosion test;Eccentric load;Progressive collapse |
| 摘要： | Abstract Due to the use of deicing salt, marine and offshore environments may cause rebar corrosion in RC flat-slab floor systems. This increases the possibility of punching shear failure of slab–column connections. However, few research results are available for RC slab–column connections with corroded rebar under eccentric load, which is very common in realistic loading conditions. To fill this gap, 15 full-scale RC flat slab–column connections were fabricated and tested to investigate the performance of corroded slab–column connections under eccentric load. The design variables included reinforcement ratio, loading eccentricity, and degree of rebar corrosion. There were two stages of the experimental process, including (1) accelerated rebar corrosion tests; and (2) quasi-static tests. It was found from the test results that, in general, rebar corrosion had detrimental effects on the punching shear strength and stiffness of the connections. In addition, corrosion of reinforcement may change the failure mode of slab–column connections. However, it was unexpected that the energy-dissipating capacity and deformation capacity of slab–column connections with high reinforcement ratio and small loading eccentricity increased with increasing corrosion degree. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 1 |
| 页码： | 1-12 |
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