Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands
Aiming at the problems of a large number of corrosion and fatigue damage of the current prestressed steel strands, this paper adopts carbon fiber-reinforced composite (CFRP) strand with better corrosion resistance and fatigue resistance and uses it in concrete structures. The bond anchorage is usual...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/19/4015 |
| _version_ | 1797477296142024704 |
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| author | Liqiang Jia Bo Wang T. Tafsirojjaman |
| author_facet | Liqiang Jia Bo Wang T. Tafsirojjaman |
| author_sort | Liqiang Jia |
| collection | DOAJ |
| description | Aiming at the problems of a large number of corrosion and fatigue damage of the current prestressed steel strands, this paper adopts carbon fiber-reinforced composite (CFRP) strand with better corrosion resistance and fatigue resistance and uses it in concrete structures. The bond anchorage is usually used to anchor CFRP tension members, which bonds the CFRP through the binding medium. Through experimental research on the CFRP strand bond anchorage, the inner taper of the CFRP prestressed strand cone was anchored and the influence of different anchor lengths and bonding media on the anchorage performance was determined. The test results demonstrate that the taper of the conical anchorage described in this paper is a key factor affecting its anchorage performance and increasing the inner taper within a certain range is beneficial to improving the anchorage performance of the conical anchorage. The bonded anchorage of the CFRP prestressed strand with a 200 mm anchor is the most reliable and efficient, as the taper of the 200 mm anchor is the largest. The average anchoring efficiency coefficient of the 200 mm anchor was 96.4%, which is 3.7% and 2.6% higher than the average anchoring efficiency coefficient of 220 mm and 250 mm anchors, respectively. The anchoring efficiency of the anchor is also high (94.1%) when the epoxy resin mortar is used as the bonding medium. Moreover, after an appropriate amount of quartz sand is added to the epoxy resin, the overall comprehensive performance of the anchor can be improved to a certain extent and the stress of the CFRP strand can be improved. The coupling between ultra-high-performance concrete dry mix (UHPC-GJL) and CFRP strand materials is not suitable for UHPC-GJL being used, as its binding medium as the average anchoring efficiency coefficient is only 44.5% when UHPC-GJL is used as the anchor bonding medium. |
| first_indexed | 2024-03-09T21:15:34Z |
| format | Article |
| id | doaj.art-0db347daa4e94ed99c3d5359df072574 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T21:15:34Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-0db347daa4e94ed99c3d5359df0725742023-11-23T21:32:50ZengMDPI AGPolymers2073-43602022-09-011419401510.3390/polym14194015Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed StrandsLiqiang Jia0Bo Wang1T. Tafsirojjaman2Guangxi Xingang Communications Investment Group Corporation Ltd., Chenguang Road 100, Qinzhou 535008, ChinaThe Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Pingleyuan Road 100, Beijing 100124, ChinaSchool of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide 5005, AustraliaAiming at the problems of a large number of corrosion and fatigue damage of the current prestressed steel strands, this paper adopts carbon fiber-reinforced composite (CFRP) strand with better corrosion resistance and fatigue resistance and uses it in concrete structures. The bond anchorage is usually used to anchor CFRP tension members, which bonds the CFRP through the binding medium. Through experimental research on the CFRP strand bond anchorage, the inner taper of the CFRP prestressed strand cone was anchored and the influence of different anchor lengths and bonding media on the anchorage performance was determined. The test results demonstrate that the taper of the conical anchorage described in this paper is a key factor affecting its anchorage performance and increasing the inner taper within a certain range is beneficial to improving the anchorage performance of the conical anchorage. The bonded anchorage of the CFRP prestressed strand with a 200 mm anchor is the most reliable and efficient, as the taper of the 200 mm anchor is the largest. The average anchoring efficiency coefficient of the 200 mm anchor was 96.4%, which is 3.7% and 2.6% higher than the average anchoring efficiency coefficient of 220 mm and 250 mm anchors, respectively. The anchoring efficiency of the anchor is also high (94.1%) when the epoxy resin mortar is used as the bonding medium. Moreover, after an appropriate amount of quartz sand is added to the epoxy resin, the overall comprehensive performance of the anchor can be improved to a certain extent and the stress of the CFRP strand can be improved. The coupling between ultra-high-performance concrete dry mix (UHPC-GJL) and CFRP strand materials is not suitable for UHPC-GJL being used, as its binding medium as the average anchoring efficiency coefficient is only 44.5% when UHPC-GJL is used as the anchor bonding medium.https://www.mdpi.com/2073-4360/14/19/4015bond type anchorageCFRP prestressed strandbonding mediumanchoring efficiency |
| spellingShingle | Liqiang Jia Bo Wang T. Tafsirojjaman Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands Polymers bond type anchorage CFRP prestressed strand bonding medium anchoring efficiency |
| title | Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands |
| title_full | Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands |
| title_fullStr | Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands |
| title_full_unstemmed | Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands |
| title_short | Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands |
| title_sort | experimental research on bonded anchorage of carbon fiber reinforced polymer prestressed strands |
| topic | bond type anchorage CFRP prestressed strand bonding medium anchoring efficiency |
| url | https://www.mdpi.com/2073-4360/14/19/4015 |
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