Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars
Anchorage force comprises bond force and bearing pressure when headed bars are used. Pull-out tests were conducted on 120 concrete specimens to derive a method for calculating the bond force for reinforcement in straight anchor sections at the yield moment. The parameters include the diameter <i&...
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| Format: | Article |
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MDPI AG
2023-09-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/10/2463 |
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| author | Tianming Miao Jian Yang Ying Zhou Meiqiu Zhan Lirong Sha Wenzhong Zheng |
| author_facet | Tianming Miao Jian Yang Ying Zhou Meiqiu Zhan Lirong Sha Wenzhong Zheng |
| author_sort | Tianming Miao |
| collection | DOAJ |
| description | Anchorage force comprises bond force and bearing pressure when headed bars are used. Pull-out tests were conducted on 120 concrete specimens to derive a method for calculating the bond force for reinforcement in straight anchor sections at the yield moment. The parameters include the diameter <i>d</i>, embedded length <i>l</i><sub>ae</sub>, and yield strength <i>f</i><sub>y</sub> of the reinforcement, as well as the strength grade of the concrete <i>f</i><sub>cg</sub>. The experimental results indicated that the specimens underwent three failure modes depending primarily on the embedded length <i>l</i><sub>ae</sub>. The nominal average bond stress <i>τ</i><sup>u</sup> concept was proposed and the difference between <i>τ</i><sup>u</sup> and the actual average bond stress <i>τ</i> caused by the headed bars was observed. To reduce the difference between the <i>τ</i><sup>u</sup> and <i>τ</i> values, the correction coefficient <i>γ</i> was proposed. Analysis indicated that <i>γ</i> increased with an increase in the <i>l</i><sub>ae</sub>/<i>d</i> (on average, 146% higher than the initial value) and decreased with an increase in the <i>f</i><sub>y</sub>/<i>f</i><sub>t</sub> (on average, 33% less than the initial value). A formula was developed to calculate <i>γ</i>, and the bond force in the straight anchor sections at the yield moment for the reinforcement was determined. Thus, a distributive relationship was established for the anchorage force, the bond force, and the bearing pressure. |
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| id | doaj.art-0ed377829ab247d792008c1d048cf098 |
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| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T21:23:11Z |
| publishDate | 2023-09-01 |
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| record_format | Article |
| series | Buildings |
| spelling | doaj.art-0ed377829ab247d792008c1d048cf0982023-11-19T15:54:43ZengMDPI AGBuildings2075-53092023-09-011310246310.3390/buildings13102463Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed BarsTianming Miao0Jian Yang1Ying Zhou2Meiqiu Zhan3Lirong Sha4Wenzhong Zheng5School of Civil Engineering, Jilin Jianzhu University, Changchun 130118, ChinaSchool of Civil Engineering, Jilin Jianzhu University, Changchun 130118, ChinaSchool of Civil Engineering, Jilin Jianzhu University, Changchun 130118, ChinaSchool of Civil Engineering, Jilin Jianzhu University, Changchun 130118, ChinaSchool of Civil Engineering, Jilin Jianzhu University, Changchun 130118, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaAnchorage force comprises bond force and bearing pressure when headed bars are used. Pull-out tests were conducted on 120 concrete specimens to derive a method for calculating the bond force for reinforcement in straight anchor sections at the yield moment. The parameters include the diameter <i>d</i>, embedded length <i>l</i><sub>ae</sub>, and yield strength <i>f</i><sub>y</sub> of the reinforcement, as well as the strength grade of the concrete <i>f</i><sub>cg</sub>. The experimental results indicated that the specimens underwent three failure modes depending primarily on the embedded length <i>l</i><sub>ae</sub>. The nominal average bond stress <i>τ</i><sup>u</sup> concept was proposed and the difference between <i>τ</i><sup>u</sup> and the actual average bond stress <i>τ</i> caused by the headed bars was observed. To reduce the difference between the <i>τ</i><sup>u</sup> and <i>τ</i> values, the correction coefficient <i>γ</i> was proposed. Analysis indicated that <i>γ</i> increased with an increase in the <i>l</i><sub>ae</sub>/<i>d</i> (on average, 146% higher than the initial value) and decreased with an increase in the <i>f</i><sub>y</sub>/<i>f</i><sub>t</sub> (on average, 33% less than the initial value). A formula was developed to calculate <i>γ</i>, and the bond force in the straight anchor sections at the yield moment for the reinforcement was determined. Thus, a distributive relationship was established for the anchorage force, the bond force, and the bearing pressure.https://www.mdpi.com/2075-5309/13/10/2463anchorage forcebond stressdistributive relationshipembedded lengthheaded barsnominal average bond stress |
| spellingShingle | Tianming Miao Jian Yang Ying Zhou Meiqiu Zhan Lirong Sha Wenzhong Zheng Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars Buildings anchorage force bond stress distributive relationship embedded length headed bars nominal average bond stress |
| title | Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars |
| title_full | Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars |
| title_fullStr | Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars |
| title_full_unstemmed | Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars |
| title_short | Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars |
| title_sort | research on the distributive relationship between bond force and bearing pressure for anchorage force by headed bars |
| topic | anchorage force bond stress distributive relationship embedded length headed bars nominal average bond stress |
| url | https://www.mdpi.com/2075-5309/13/10/2463 |
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