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Punching Shear Resistance of Corroded Slab-Column Connections Subjected to Eccentric Load

Weng, Y., Fu, F. ORCID: 0000-0002-9176-8159 & Qian, K. (2022). Punching Shear Resistance of Corroded Slab-Column Connections Subjected to Eccentric Load. Journal of Structural Engineering,

Abstract

Due to deicing salt, marine and offshore environment may cause rebar corrosion in reinforced concrete (RC) flat-slab floor system. Therefore, it increases the possibility of punching shear failure of slab-column connections. However, little research results are available for RC slab-column connections with corroded rebars under eccentric load, which is very common in realistic loading conditions. To fill the gap, 15 full9 scaled RC flat slab-column connections were fabricated and tested to investigate the performance of corroded slab-column connections under eccentric load. The design variables include reinforcement ratio, loading eccentricity, and degree of rebar corrosion. There are two stages for the experimental process including: 1) accelerated rebar corrosion test; and 2) quasi-static test. It is found from the test results that, in general, rebar corrosion has detrimental effects on the punching shear strength and stiffness of the connections. In addition, corrosion of reinforcement may change the failure mode of the slab-column connection. However, it is unexpected that the energy-dissipating capacity and deformation capacity of the slab-column connection with high reinforcement ratio and small loading eccentricity increased with increasing the corroded degree.

Publication Type: Article
Additional Information: This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://ascelibrary.org/.
Publisher Keywords: Punching shear resistance; Reinforced concrete slab-column connection; Accelerated corrosion test; Eccentric load; Experimental results
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
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