Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete
Rapid strengthening is focused on recently to reduce the time for reinforcement process and decrease the losses. However, there are some limits for the existing reinforcement technologies to be used for rapid strengthening. The paper reports an experimental investigation on eccentric compressive beh...
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MDPI AG
2018-10-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/10/1827 |
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| author | Xiaobin Li Hongwei Xie Meng Yan Hongye Gou Gangyun Zhao Yi Bao |
| author_facet | Xiaobin Li Hongwei Xie Meng Yan Hongye Gou Gangyun Zhao Yi Bao |
| author_sort | Xiaobin Li |
| collection | DOAJ |
| description | Rapid strengthening is focused on recently to reduce the time for reinforcement process and decrease the losses. However, there are some limits for the existing reinforcement technologies to be used for rapid strengthening. The paper reports an experimental investigation on eccentric compressive behavior of reinforced concrete columns that are strengthened using steel mesh reinforced resin concrete (SMRC) for rapid strengthening. Four reinforced concrete columns with 180 mm × 250 mm test cross section and 1000 mm test height were fabricated and tested under large eccentric compressive load. Among the four columns, three columns were strengthened using SMRC with different numbers of steel mesh layers; the other column was not strengthened and was used as the control specimen. The effect of layer number of steel mesh on the failure mode, cracking load and load capacity of the columns were studied. Finite element analysis was carried out to evaluate the effects of the layer number of steel mesh, thickness of SMRC layer, and the load-holding level on the load capacity of the columns. Results show that the crack distribution of the strengthened columns was influenced by the layer number of steel mesh. The layer number was the dominant variable for the load capacity, rather than the thickness of the SMRC layer. With the increase of load-holding level, the load capacity of the strengthened column decreased following a bilinear trend. Some conclusions can be drawn that the reasonable reinforcement ratio of steel mesh is about 2%. Resin concrete is mainly used as bonding layer. The decreasing rate of the bearing capacity is higher at the high load-holding levels. |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-13T05:37:07Z |
| publishDate | 2018-10-01 |
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| spelling | doaj.art-eaf67f809c454ef58c535eedc954a7562022-12-22T03:00:14ZengMDPI AGApplied Sciences2076-34172018-10-01810182710.3390/app8101827app8101827Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin ConcreteXiaobin Li0Hongwei Xie1Meng Yan2Hongye Gou3Gangyun Zhao4Yi Bao5Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USARapid strengthening is focused on recently to reduce the time for reinforcement process and decrease the losses. However, there are some limits for the existing reinforcement technologies to be used for rapid strengthening. The paper reports an experimental investigation on eccentric compressive behavior of reinforced concrete columns that are strengthened using steel mesh reinforced resin concrete (SMRC) for rapid strengthening. Four reinforced concrete columns with 180 mm × 250 mm test cross section and 1000 mm test height were fabricated and tested under large eccentric compressive load. Among the four columns, three columns were strengthened using SMRC with different numbers of steel mesh layers; the other column was not strengthened and was used as the control specimen. The effect of layer number of steel mesh on the failure mode, cracking load and load capacity of the columns were studied. Finite element analysis was carried out to evaluate the effects of the layer number of steel mesh, thickness of SMRC layer, and the load-holding level on the load capacity of the columns. Results show that the crack distribution of the strengthened columns was influenced by the layer number of steel mesh. The layer number was the dominant variable for the load capacity, rather than the thickness of the SMRC layer. With the increase of load-holding level, the load capacity of the strengthened column decreased following a bilinear trend. Some conclusions can be drawn that the reasonable reinforcement ratio of steel mesh is about 2%. Resin concrete is mainly used as bonding layer. The decreasing rate of the bearing capacity is higher at the high load-holding levels.http://www.mdpi.com/2076-3417/8/10/1827eccentric compressionreinforced concrete columnsteel mesh reinforced resin concrete (SMRC)strengthening |
| spellingShingle | Xiaobin Li Hongwei Xie Meng Yan Hongye Gou Gangyun Zhao Yi Bao Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete Applied Sciences eccentric compression reinforced concrete column steel mesh reinforced resin concrete (SMRC) strengthening |
| title | Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete |
| title_full | Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete |
| title_fullStr | Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete |
| title_full_unstemmed | Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete |
| title_short | Eccentric Compressive Behavior of Reinforced Concrete Columns Strengthened Using Steel Mesh Reinforced Resin Concrete |
| title_sort | eccentric compressive behavior of reinforced concrete columns strengthened using steel mesh reinforced resin concrete |
| topic | eccentric compression reinforced concrete column steel mesh reinforced resin concrete (SMRC) strengthening |
| url | http://www.mdpi.com/2076-3417/8/10/1827 |
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