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Gravity Load Effect on Punching Behavior of GFRP-RC Interior Slab-Column Connection Subjected to Lateral Cyclic Load
In recent decades, FRP reinforcing bars have been widely used in construction applications as internal reinforcement in concrete members. However, the feasibility of using FRP bars as internal reinforcement in seismically active regions has become called into question. Moreover, CSA S806-12 and ACI 440.1R-15 do not include any requirements concerning the strength, stiffness, or drift capacity of flat-plate structures under seismic load. This study aims to assess the effect of increasing the gravity shear on the strength and stiffness of the FRP-RC slab-column connections under lateral cyclic loading. Two full-scale interior slab-column connections were constructed and tested under combined gravity and quasi-static revered lateral cyclic loading until failure. The slabs measured 2500 × 2500, with a thickness of 200 mm. A square column of 300 mm extended from the center of the slab surfaces by 700 mm. The performance of connections was evaluated based on the experimentally recorded moment lateral drift hysteretic relationships, connection stiffness, and energy dissipation. The test results revealed that increasing the slab gravity-load intensity and subsequent punching shear level at the interior connection had a considerable effect on punching shear performance. The unbalanced moment and the lateral-drift capacities decreased by 16 and 22%. Moreover, the specimen, which was subjected to a higher gravity load, displayed higher connection stiffness degradation.
Gravity Load Effect on Punching Behavior of GFRP-RC Interior Slab-Column Connection Subjected to Lateral Cyclic Load
In recent decades, FRP reinforcing bars have been widely used in construction applications as internal reinforcement in concrete members. However, the feasibility of using FRP bars as internal reinforcement in seismically active regions has become called into question. Moreover, CSA S806-12 and ACI 440.1R-15 do not include any requirements concerning the strength, stiffness, or drift capacity of flat-plate structures under seismic load. This study aims to assess the effect of increasing the gravity shear on the strength and stiffness of the FRP-RC slab-column connections under lateral cyclic loading. Two full-scale interior slab-column connections were constructed and tested under combined gravity and quasi-static revered lateral cyclic loading until failure. The slabs measured 2500 × 2500, with a thickness of 200 mm. A square column of 300 mm extended from the center of the slab surfaces by 700 mm. The performance of connections was evaluated based on the experimentally recorded moment lateral drift hysteretic relationships, connection stiffness, and energy dissipation. The test results revealed that increasing the slab gravity-load intensity and subsequent punching shear level at the interior connection had a considerable effect on punching shear performance. The unbalanced moment and the lateral-drift capacities decreased by 16 and 22%. Moreover, the specimen, which was subjected to a higher gravity load, displayed higher connection stiffness degradation.
Gravity Load Effect on Punching Behavior of GFRP-RC Interior Slab-Column Connection Subjected to Lateral Cyclic Load
Lecture Notes in Civil Engineering
Benmokrane, Brahim (editor) / Mohamed, Khaled (editor) / Farghaly, Ahmed (editor) / Mohamed, Hamdy (editor) / Eladawy, Mohamed (author) / Benmokrane, Brahim (author) / Hassan, Mohamed (author)
8th International Conference on Advanced Composite Materials in Bridges and Structures ; Chapter: 24 ; 205-212
2022-09-27
8 pages
Article/Chapter (Book)
Electronic Resource
English
Punching Shear Strength of GFRP-RC Interior Slab–Column Connections Subjected to Moment Transfer
| Online Contents | 2016