Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study
Over the last two decades, considerable attention has been devoted to the strengthening of sub-standard flat-slab constructions. With the evolution of composite materials and an increasing emphasis on the economical and sustainable use of natural fibers, many researchers have utilized them in the st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/4/719 |
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| author | Panuwat Joyklad Ekkachai Yooprasertchai Pongsak Wiwatrojanagul Krisada Chaiyasarn Nazam Ali Qudeer Hussain |
| author_facet | Panuwat Joyklad Ekkachai Yooprasertchai Pongsak Wiwatrojanagul Krisada Chaiyasarn Nazam Ali Qudeer Hussain |
| author_sort | Panuwat Joyklad |
| collection | DOAJ |
| description | Over the last two decades, considerable attention has been devoted to the strengthening of sub-standard flat-slab constructions. With the evolution of composite materials and an increasing emphasis on the economical and sustainable use of natural fibers, many researchers have utilized them in the strengthening of flat flabs mitigating punching failures. This study aims at investigating and comparing the behavior of flat slabs strengthened with post-installed composite and natural reinforcements. An experimental program was devised consisting of eight flat-slab specimens. One specimen was tested in as-built condition to provide a reference. The remaining specimens were strengthened with Carbon Fiber-Reinforced Polymer (CFRP), Aramid Fiber-Reinforced Polymer (AFRP), and sisal rods. The pattern of post-installed rods was varied as single line, double line, and star shapes around the column. The results indicated that the single-line pattern could only enhance the maximum sustained load by up to 6% compared to that of the reference specimen. On the contrary, double line and star shape configurations resulted in a substantial increase in the maximum sustained load. An analytical assessment of ACI 318-19 provisions resulted in an over-estimation of the shear strengths of CFRP- and AFRP-strengthened slabs. Furthermore, the same provisions led to lower yields than experimental shear strengths for sisal-strengthened slabs. |
| first_indexed | 2024-03-09T21:11:48Z |
| format | Article |
| id | doaj.art-269a7de8193c4257af534c2cd6113109 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T21:11:48Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-269a7de8193c4257af534c2cd61131092023-11-23T21:44:44ZengMDPI AGPolymers2073-43602022-02-0114471910.3390/polym14040719Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative StudyPanuwat Joyklad0Ekkachai Yooprasertchai1Pongsak Wiwatrojanagul2Krisada Chaiyasarn3Nazam Ali4Qudeer Hussain5Department of Civil and Environmental Engineering, Faculty of Engineering, Srinakharinwirot University, Nakhonnayok 26120, ThailandConstruction Innovations and Future Infrastructure Research Center (CIFIR), Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok 10140, ThailandTheta Forge, Ladprao, Bangkok 10230, ThailandThammasat Research Unit in Infrastructure Inspection and Monitoring, Repair and Strengthening (IIMRS), Thammasat School of Engineering, Faculty of Engineering, Thammasat University Rangsit, Rangsit 12121, ThailandDepartment of Civil Engineering, School of Engineering, University of Management and Technology, Lahore 54770, PakistanCenter of Excellence in Earthquake Engineering and Vibration, Department of Civil Engineering, Chulalongkorn University, Bangkok 10330, ThailandOver the last two decades, considerable attention has been devoted to the strengthening of sub-standard flat-slab constructions. With the evolution of composite materials and an increasing emphasis on the economical and sustainable use of natural fibers, many researchers have utilized them in the strengthening of flat flabs mitigating punching failures. This study aims at investigating and comparing the behavior of flat slabs strengthened with post-installed composite and natural reinforcements. An experimental program was devised consisting of eight flat-slab specimens. One specimen was tested in as-built condition to provide a reference. The remaining specimens were strengthened with Carbon Fiber-Reinforced Polymer (CFRP), Aramid Fiber-Reinforced Polymer (AFRP), and sisal rods. The pattern of post-installed rods was varied as single line, double line, and star shapes around the column. The results indicated that the single-line pattern could only enhance the maximum sustained load by up to 6% compared to that of the reference specimen. On the contrary, double line and star shape configurations resulted in a substantial increase in the maximum sustained load. An analytical assessment of ACI 318-19 provisions resulted in an over-estimation of the shear strengths of CFRP- and AFRP-strengthened slabs. Furthermore, the same provisions led to lower yields than experimental shear strengths for sisal-strengthened slabs.https://www.mdpi.com/2073-4360/14/4/719flat slabsnatural fiberssynthetic fiberspunching shearfiber-reinforced polymersconcrete |
| spellingShingle | Panuwat Joyklad Ekkachai Yooprasertchai Pongsak Wiwatrojanagul Krisada Chaiyasarn Nazam Ali Qudeer Hussain Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study Polymers flat slabs natural fibers synthetic fibers punching shear fiber-reinforced polymers concrete |
| title | Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study |
| title_full | Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study |
| title_fullStr | Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study |
| title_full_unstemmed | Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study |
| title_short | Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study |
| title_sort | use of natural and synthetic fiber reinforced composites for punching shear of flat slabs a comparative study |
| topic | flat slabs natural fibers synthetic fibers punching shear fiber-reinforced polymers concrete |
| url | https://www.mdpi.com/2073-4360/14/4/719 |
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