Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate
Recycled concrete is widely recognized as favorable for environmental protection and sustainable development. However, recycled concrete, especially containing abandoned brick aggregate, is rarely used in main structural members due to its inherent defects. Concrete-filled double steel tube columns...
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MDPI AG
2025-07-01
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| author | Yuanyuan Sun Dongxu Hou Yanbiao Shi Yamei Sun Fancheng Meng Dong Chen |
| author_facet | Yuanyuan Sun Dongxu Hou Yanbiao Shi Yamei Sun Fancheng Meng Dong Chen |
| author_sort | Yuanyuan Sun |
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| description | Recycled concrete is widely recognized as favorable for environmental protection and sustainable development. However, recycled concrete, especially containing abandoned brick aggregate, is rarely used in main structural members due to its inherent defects. Concrete-filled double steel tube columns (CFDSTCs), consisting of an outer and an inner steel tube with concrete filling the entire section, are effective in load bearing and deformation resistance. The structural application of abandoned brick aggregate, resulting from urbanization renewal, might be widened through CFDSTCs. This paper presents an experimental and analytical study aiming to investigate the axial compressive behavior of recycled-brick-aggregate-concrete-filled double steel tube columns (RBCDSTs). A total of six specimens were tested under concentric compression, including five RBCDSTs and one concrete-filled single steel tube column. The varied parameters included the replacement ratios (0% and 25%) of brick aggregate and the thickness ratio of the inner and outer steel tubes (0.75, 1, and 1.25). Theoretical analysis was also carried out. A new constitutive model of RBCDST was proposed and used in finite element analysis. The investigation indicated that, under the current conditions, the presence of the inner steel tube only increased the strength by 0.14%. When the inner and outer diameter ratio is 0.73, using a 25% replacement rate of bricks in the entire cross-section or only in the ring area of the cross-section will result in 21.1% and 10.1% strength decreases, respectively. For every 0.6% increase in the diameter-to-thickness ratio of the outer tube, the strength of RBCDST increases 16.3% on average. |
| format | Article |
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| institution | DOAJ |
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| language | English |
| publishDate | 2025-07-01 |
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| spelling | doaj-art-4bc9cd866c9440aa9f09919ab06044fc2025-08-20T03:07:54ZengMDPI AGBuildings2075-53092025-07-011514242410.3390/buildings15142424Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick AggregateYuanyuan Sun0Dongxu Hou1Yanbiao Shi2Yamei Sun3Fancheng Meng4Dong Chen5School of Civil Engineering, Shenyang University, Shenyang 110044, ChinaSchool of Civil Engineering, Shenyang University, Shenyang 110044, ChinaSchool of Civil Engineering, Shenyang University, Shenyang 110044, ChinaSchool of Civil Engineering, Shenyang University, Shenyang 110044, ChinaShenyang Construction Engineering Quality Testing Center Co., Ltd., Shenyang 110004, ChinaShenyang Construction Engineering Quality Testing Center Co., Ltd., Shenyang 110004, ChinaRecycled concrete is widely recognized as favorable for environmental protection and sustainable development. However, recycled concrete, especially containing abandoned brick aggregate, is rarely used in main structural members due to its inherent defects. Concrete-filled double steel tube columns (CFDSTCs), consisting of an outer and an inner steel tube with concrete filling the entire section, are effective in load bearing and deformation resistance. The structural application of abandoned brick aggregate, resulting from urbanization renewal, might be widened through CFDSTCs. This paper presents an experimental and analytical study aiming to investigate the axial compressive behavior of recycled-brick-aggregate-concrete-filled double steel tube columns (RBCDSTs). A total of six specimens were tested under concentric compression, including five RBCDSTs and one concrete-filled single steel tube column. The varied parameters included the replacement ratios (0% and 25%) of brick aggregate and the thickness ratio of the inner and outer steel tubes (0.75, 1, and 1.25). Theoretical analysis was also carried out. A new constitutive model of RBCDST was proposed and used in finite element analysis. The investigation indicated that, under the current conditions, the presence of the inner steel tube only increased the strength by 0.14%. When the inner and outer diameter ratio is 0.73, using a 25% replacement rate of bricks in the entire cross-section or only in the ring area of the cross-section will result in 21.1% and 10.1% strength decreases, respectively. For every 0.6% increase in the diameter-to-thickness ratio of the outer tube, the strength of RBCDST increases 16.3% on average.https://www.mdpi.com/2075-5309/15/14/2424concrete-filled double steel tube columnrecycled concretebrick aggregateaxial compressive |
| spellingShingle | Yuanyuan Sun Dongxu Hou Yanbiao Shi Yamei Sun Fancheng Meng Dong Chen Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate Buildings concrete-filled double steel tube column recycled concrete brick aggregate axial compressive |
| title | Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate |
| title_full | Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate |
| title_fullStr | Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate |
| title_full_unstemmed | Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate |
| title_short | Experimental and Mechanism Study on Axial Compressive Performance of Double Steel Tube Columns Filled with Recycled Concrete Containing Abandoned Brick Aggregate |
| title_sort | experimental and mechanism study on axial compressive performance of double steel tube columns filled with recycled concrete containing abandoned brick aggregate |
| topic | concrete-filled double steel tube column recycled concrete brick aggregate axial compressive |
| url | https://www.mdpi.com/2075-5309/15/14/2424 |
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