Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns
Through low-cycle reciprocating tests on 11 masonry wall specimens strengthened using reinforced-concrete–masonry composite columns, the effects of the position of the composite column, height-to-width ratio, column reinforcement ratio, and axial load ratio on their load-carrying capacity, stiffness...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/1/184 |
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| author | Fengmin Xia Kaozhong Zhao Jihui Zhao Xiangjin Cui |
| author_facet | Fengmin Xia Kaozhong Zhao Jihui Zhao Xiangjin Cui |
| author_sort | Fengmin Xia |
| collection | DOAJ |
| description | Through low-cycle reciprocating tests on 11 masonry wall specimens strengthened using reinforced-concrete–masonry composite columns, the effects of the position of the composite column, height-to-width ratio, column reinforcement ratio, and axial load ratio on their load-carrying capacity, stiffness, ductility, and energy dissipation capacity were investigated. It was experimentally found that, by strengthening brick walls with RC–masonry composite columns, the concrete and masonry parts can work together effectively, the failure mode shifts from shear to flexural failure, and the strengthened walls exhibit improved bearing capacity, ductility, and energy dissipation performance compared to unstrengthened masonry walls. It is suggested the composite columns can be placed at the ends of the wall if a strengthening measure is required. For walls with height-to-width ratios greater than 1, placing composite columns in the middle of a wall has little effect on the bearing capacity and stiffness of the wall but can improve the ductility of the wall. The height-to-width ratio is a primary factor influencing the structural performance of masonry walls strengthened using composite columns. A smaller height-to-width ratio leads to higher load-carrying capacity and stiffness but may result in reduced ductility. In comparison, the impact of the column reinforcement ratio and axial load ratio is relatively weaker. The flexural capacity of the masonry wall after strengthening can be obtained using the calculation method for concrete members subjected to a combined action of flexure and compression, in which the compressive strength of the masonry is considered. |
| first_indexed | 2024-03-08T09:55:54Z |
| format | Article |
| id | doaj.art-803af44068944fdd93430db6925fe796 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:55:54Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-803af44068944fdd93430db6925fe7962024-01-29T13:49:06ZengMDPI AGBuildings2075-53092024-01-0114118410.3390/buildings14010184Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite ColumnsFengmin Xia0Kaozhong Zhao1Jihui Zhao2Xiangjin Cui3Key Lab of Building Structural Retrofitting and Underground Space Engineering of the Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Lab of Building Structural Retrofitting and Underground Space Engineering of the Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaShandong Academy of Building Research Co., Ltd. (SDABR), Jinan 250031, ChinaKey Lab of Building Structural Retrofitting and Underground Space Engineering of the Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaThrough low-cycle reciprocating tests on 11 masonry wall specimens strengthened using reinforced-concrete–masonry composite columns, the effects of the position of the composite column, height-to-width ratio, column reinforcement ratio, and axial load ratio on their load-carrying capacity, stiffness, ductility, and energy dissipation capacity were investigated. It was experimentally found that, by strengthening brick walls with RC–masonry composite columns, the concrete and masonry parts can work together effectively, the failure mode shifts from shear to flexural failure, and the strengthened walls exhibit improved bearing capacity, ductility, and energy dissipation performance compared to unstrengthened masonry walls. It is suggested the composite columns can be placed at the ends of the wall if a strengthening measure is required. For walls with height-to-width ratios greater than 1, placing composite columns in the middle of a wall has little effect on the bearing capacity and stiffness of the wall but can improve the ductility of the wall. The height-to-width ratio is a primary factor influencing the structural performance of masonry walls strengthened using composite columns. A smaller height-to-width ratio leads to higher load-carrying capacity and stiffness but may result in reduced ductility. In comparison, the impact of the column reinforcement ratio and axial load ratio is relatively weaker. The flexural capacity of the masonry wall after strengthening can be obtained using the calculation method for concrete members subjected to a combined action of flexure and compression, in which the compressive strength of the masonry is considered.https://www.mdpi.com/2075-5309/14/1/184reinforced-concrete–masonry composite columnstrengtheningbrick wallseismic resistance |
| spellingShingle | Fengmin Xia Kaozhong Zhao Jihui Zhao Xiangjin Cui Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns Buildings reinforced-concrete–masonry composite column strengthening brick wall seismic resistance |
| title | Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns |
| title_full | Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns |
| title_fullStr | Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns |
| title_full_unstemmed | Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns |
| title_short | Experimental Study on the Seismic Performance of Brick Walls Strengthened by Small-Spaced Reinforced-Concrete–Masonry Composite Columns |
| title_sort | experimental study on the seismic performance of brick walls strengthened by small spaced reinforced concrete masonry composite columns |
| topic | reinforced-concrete–masonry composite column strengthening brick wall seismic resistance |
| url | https://www.mdpi.com/2075-5309/14/1/184 |
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