Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete
The topic of present research is the experimental investigation of pull-out resistance of B500B-type ribbed reinforcing steel bars embedded in lightweight aggregate concrete (LWAC) under unidirectional cyclic loading. Only a limited amount of standardized data on bond strengths are available in the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Solids |
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| Online Access: | https://www.mdpi.com/2673-6497/3/3/28 |
| _version_ | 1797482352308387840 |
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| author | Tamás Kovács Zoltán Gyurkó Levente Jakab Rita Nemes |
| author_facet | Tamás Kovács Zoltán Gyurkó Levente Jakab Rita Nemes |
| author_sort | Tamás Kovács |
| collection | DOAJ |
| description | The topic of present research is the experimental investigation of pull-out resistance of B500B-type ribbed reinforcing steel bars embedded in lightweight aggregate concrete (LWAC) under unidirectional cyclic loading. Only a limited amount of standardized data on bond strengths are available in the case of cyclic loading, especially for lightweight aggregate concrete. This paper deals with the experimental comparison of bond behavior of steel bars embedded in LWAC with expanded clay (Liapor) aggregate and normal weight aggregate concrete (NWAC) specimens by means of standard (non-cyclic) and cyclic pull-out tests. The LWAC and NWAC specimen’s mixes were identical except for the type of the coarse aggregate. It was found that the bond strength determined by non-cyclic pull-out tests showed a higher standard deviation compared to that for compression and splitting tensile strength tests. The shape of the characteristic bond strength–the slip curve was similar in the case of LWAC and NWAC and the failure mode was the same for both types of aggregate. Moreover, the maximum value of bond stress was identical for LWAC and NWAC and also no significant difference was found in the low cycle number fatigue. Both mixes were able to resist the maximum pull-out force multiple times in the case of cyclic loading because there was no time for the development of cracks. |
| first_indexed | 2024-03-09T22:31:05Z |
| format | Article |
| id | doaj.art-93f398dcddc04f9fb60901c617a672ed |
| institution | Directory Open Access Journal |
| issn | 2673-6497 |
| language | English |
| last_indexed | 2024-03-09T22:31:05Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Solids |
| spelling | doaj.art-93f398dcddc04f9fb60901c617a672ed2023-11-23T18:56:50ZengMDPI AGSolids2673-64972022-07-013339741510.3390/solids3030028Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate ConcreteTamás Kovács0Zoltán Gyurkó1Levente Jakab2Rita Nemes3Department of Structural Engineering, Faculty of Civil Enineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, HungaryDepartment of Construction Materials and Technologies, Faculty of Civil Enineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, HungaryDepartment of Polymer Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, HungaryDepartment of Construction Materials and Technologies, Faculty of Civil Enineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, HungaryThe topic of present research is the experimental investigation of pull-out resistance of B500B-type ribbed reinforcing steel bars embedded in lightweight aggregate concrete (LWAC) under unidirectional cyclic loading. Only a limited amount of standardized data on bond strengths are available in the case of cyclic loading, especially for lightweight aggregate concrete. This paper deals with the experimental comparison of bond behavior of steel bars embedded in LWAC with expanded clay (Liapor) aggregate and normal weight aggregate concrete (NWAC) specimens by means of standard (non-cyclic) and cyclic pull-out tests. The LWAC and NWAC specimen’s mixes were identical except for the type of the coarse aggregate. It was found that the bond strength determined by non-cyclic pull-out tests showed a higher standard deviation compared to that for compression and splitting tensile strength tests. The shape of the characteristic bond strength–the slip curve was similar in the case of LWAC and NWAC and the failure mode was the same for both types of aggregate. Moreover, the maximum value of bond stress was identical for LWAC and NWAC and also no significant difference was found in the low cycle number fatigue. Both mixes were able to resist the maximum pull-out force multiple times in the case of cyclic loading because there was no time for the development of cracks.https://www.mdpi.com/2673-6497/3/3/28pull-out testcyclic loadinglightweight aggregateexpanded claymodel code 2010 |
| spellingShingle | Tamás Kovács Zoltán Gyurkó Levente Jakab Rita Nemes Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete Solids pull-out test cyclic loading lightweight aggregate expanded clay model code 2010 |
| title | Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete |
| title_full | Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete |
| title_fullStr | Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete |
| title_full_unstemmed | Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete |
| title_short | Influence of Unidirectional Cyclic Loading on Bond between Steel Bars Embedded in Lightweight Aggregate Concrete |
| title_sort | influence of unidirectional cyclic loading on bond between steel bars embedded in lightweight aggregate concrete |
| topic | pull-out test cyclic loading lightweight aggregate expanded clay model code 2010 |
| url | https://www.mdpi.com/2673-6497/3/3/28 |
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