Punching Shear Behavior of Flat Slabs Strengthened with Fiber Reinforced Polymer Laminates
Source abstract
Abstract
The present work reports the test results of seven full-scale reinforced concrete slab-column edge connections strengthened against punching shear using different methods. In this study, three slabs contained openings in the vicinity of the column, and the other four were without openings. The dimensions of the slabs were 1,540×1,020×120 mm with square columns (250×250 mm). The openings in the specimens were square (150×150 mm) with the sides parallel to the sides of the column. The slabs were reinforced with an average reinforcement ratio of 0.75%. Except for the two reference slabs, two different strengthening techniques were considered. Technique I applies externally bonded fiber reinforced polymer (FRP) flexible sheets on the slab around the column in two schemes with one or two layers of FRP sheets glued to the tension face or both tension and compression faces of the slab. Both glass and carbon FRP sheets were considered. Technique II applies externally bonded FRP sheets using either the first or second scheme combined with installing steel bolts through holes across the slab thickness around the column. Based on the test results, it is concluded that the presence of FRP sheets and steel bolts substantially increased the punching capacity of the connections. Code design expressions were conservative in predicting the experimental results.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Concrete Corrosion and Durability · Structural Response to Dynamic Loads
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research Associate Professor, Dept. of Civil Engineering, Univ. of Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1. E-mail: ehab.elsalakawy@Usherbrooke.ca
Canada Research Chair in Innovative Structural Rehabilitation, Dept. of Civil Engineering, Univ. of Waterloo, Waterloo ON, Canada N2L 3G1. E-mail: soudki@uwaterloo.ca
Professor, Dept. of Civil Engineering, Univ. of Waterloo, Waterloo ON, Canada N2L 3G1. E-mail: polak@uwaterloo.ca
References (18)
Show source-provided references
1. American Concrete Institute (ACI). (2002a). “Building code requirements for structural concrete and commentary.” ACI 318-02 Farmington Hills Mich.
2. American Concrete Institute (ACI). (2002b). “Design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-02 Farmington Hills Mich.
3. Canadian Standards Association (CSA). (1994). “Design of concrete structures for buildings.” A23.3–94 Rexdale Ont. Canada.
4. Canadian Standards Association (CSA). (2002). “Design and construction of building components with fibre-reinforced polymers.” CSA S806–02 CSA Rexdale Ont. Canada.
5. Chen C.C. and Li C.Y. ( 2000). “An experimental study on the punching shear behaviour of RC slabs.” Proc. Int. Workshop on Punching Shear Capacity on RC Slabs Royal Institute of Technology Stockholm 415–422.
6. Reinforced concrete slab–column edge connections with openings
7. 10.1139/l99-06210.1139/l99-062 ↗
8. 10.1139/l02-04510.1139/l02-045 ↗
9. New shear strenghtening technique for concrete slab–column connections
10. Erki M.A. and Heffernan P.J. ( 1995). “Reinforced concrete slabs externally strengthened with fibre reinforced plastics materials.” Proc. 2nd Int. Symp. on Nonmetalic FRP reinforcement for Concrete Structures L. Taerwe ed. University of Ghent Belgium 509–516.
11. Ghali A. Sargious M.A. and Huizer A. ( 1974). “Vertical prestressing of flat plates around columns.” Shear in Reinforced Concrete ACI Special Publication No. SP-42(2) Farmington Hills Mich. 905–920.
12. 10.1061/(ASCE)1090-0268(2003)7:2(145)10.1061/(ASCE)1090-0268(2003)7:2(145) ↗
13. Ichimasu H. Maruyama M. Watanabe H. and Hirose T. ( 1993). “RC slabs strengthened by bonded carbon FRP plates.” Int. Symp. on Fibre Reinforced Polymer Reinforcements for Concrete Structures ACI Special Publication No. SP-138 Farmington Hills Mich. 932–955.
14. ISIS Canada. (2001) “Strengthening reinforcing concrete structures with externally- bonded fibre reinforced polymers.” The Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures ISIS M04–01 Univ. of Winnipeg Man. Canada.
15. Karbhari V.M. Seible F. Seim W. and Vasques A. ( 1996). “Poststrengthening of concrete slabs.” Int. Symp. on Fibre Reinforced Polymer Reinforcements for Concrete Structures ACI Special Publication No. SP-188 Farmington Hills Mich. 1163–1173.
16. Malvar L.J. Warren G.E. and Inaba C.M. ( 2000). “Large scale tests on Navy reinforced concrete pier decks strengthened with CFRP sheets.” Proc. 3rd Int. Conf. on Advanced Composite Materials in Bridges and Structures Humar and Razaqpur eds. Canadian Society of Civil Engineering (CSCE) Montreal 497–504.
17. Ramos A.M. Lucio V.J. and Regan P.E. ( 2000). “Repair and strengthening methods of flat slabs for punching.” Proc. Int. Workshop on Punching Shear Capacity on RC Slabs 125–133.
18. Tan K.H. ( 1996). “Punching shear strength of RC slabs bonded with FRP systems.” Proc. 2nd Int. Conf. on Advanced Composite Materials in Bridges and Structures El-Badry ed. Canadian Society of Civil Engineering (CSCE) Montreal 387–394.