Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion
This study aims to examine the effects of local corrosion on the axial compression performance of concrete-filled steel tubular (CFST) members. Nineteen CFST short columns with local corrosion were designed and fabricated to undergo axial compression mechanical property tests, with the radial corros...
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2024-11-01
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| author | Wei Fang Mengcheng Chen Qingqing Wen Hong Huang Kaicheng Xu Rui Zhang |
| author_facet | Wei Fang Mengcheng Chen Qingqing Wen Hong Huang Kaicheng Xu Rui Zhang |
| author_sort | Wei Fang |
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| description | This study aims to examine the effects of local corrosion on the axial compression performance of concrete-filled steel tubular (CFST) members. Nineteen CFST short columns with local corrosion were designed and fabricated to undergo axial compression mechanical property tests, with the radial corrosion depth of the local corrosion area as the key test parameter. The failure mechanism and mechanical property change laws of CFST axial compression short columns with circumferential full corrosion at the ends and middle were studied. Combined with finite element modeling, the influence laws of the three-dimensional geometrical characteristics of the local corrosion zone, i.e., the axial length, the annular width and the radial depth, on the structural bearing performance were thoroughly explored and discussed. The results revealed that the main reason for the reduction in load-carrying capacity of circular CFST axial columns due to local corrosion is attributed to the reduction of the effective cross-sectional area of the steel tube in the corrosion area. When local corrosion occurs at different axial positions, the variation range of the bearing capacity of CFST columns is within 10%. Regarding the impact of the three dimensions of local corrosion on the axial load-carrying capacity of CFST, the radial corrosion depth was identified as the most influential factor, followed by the annular corrosion width, and finally by the axial corrosion length. When the axial corrosion length exceeds 20% of the specimen length, its further influence on the load-carrying capacity is considered limited. Finally, a practical calculation formula for the bearing capacity of locally corroded CFST columns is proposed. The predicted results of this formula fit well with the test results and can quickly estimate the remaining bearing capacity of the structure by measuring the geometric parameters of the local corrosion area, providing a reference for the assessment and maintenance of CFST structures. |
| format | Article |
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| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-7acf076c4aa54d6eb3fef3384c49c49b2025-08-20T02:28:11ZengMDPI AGBuildings2075-53092024-11-011411362810.3390/buildings14113628Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local CorrosionWei Fang0Mengcheng Chen1Qingqing Wen2Hong Huang3Kaicheng Xu4Rui Zhang5State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructures, Nanchang 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructures, Nanchang 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructures, Nanchang 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructures, Nanchang 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructures, Nanchang 330013, ChinaSchool of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, ChinaThis study aims to examine the effects of local corrosion on the axial compression performance of concrete-filled steel tubular (CFST) members. Nineteen CFST short columns with local corrosion were designed and fabricated to undergo axial compression mechanical property tests, with the radial corrosion depth of the local corrosion area as the key test parameter. The failure mechanism and mechanical property change laws of CFST axial compression short columns with circumferential full corrosion at the ends and middle were studied. Combined with finite element modeling, the influence laws of the three-dimensional geometrical characteristics of the local corrosion zone, i.e., the axial length, the annular width and the radial depth, on the structural bearing performance were thoroughly explored and discussed. The results revealed that the main reason for the reduction in load-carrying capacity of circular CFST axial columns due to local corrosion is attributed to the reduction of the effective cross-sectional area of the steel tube in the corrosion area. When local corrosion occurs at different axial positions, the variation range of the bearing capacity of CFST columns is within 10%. Regarding the impact of the three dimensions of local corrosion on the axial load-carrying capacity of CFST, the radial corrosion depth was identified as the most influential factor, followed by the annular corrosion width, and finally by the axial corrosion length. When the axial corrosion length exceeds 20% of the specimen length, its further influence on the load-carrying capacity is considered limited. Finally, a practical calculation formula for the bearing capacity of locally corroded CFST columns is proposed. The predicted results of this formula fit well with the test results and can quickly estimate the remaining bearing capacity of the structure by measuring the geometric parameters of the local corrosion area, providing a reference for the assessment and maintenance of CFST structures.https://www.mdpi.com/2075-5309/14/11/3628concrete-filled steel tubularlocal corrosionaxial compression testfinite element analysisbearing capacity calculation |
| spellingShingle | Wei Fang Mengcheng Chen Qingqing Wen Hong Huang Kaicheng Xu Rui Zhang Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion Buildings concrete-filled steel tubular local corrosion axial compression test finite element analysis bearing capacity calculation |
| title | Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion |
| title_full | Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion |
| title_fullStr | Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion |
| title_full_unstemmed | Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion |
| title_short | Experimental and Numerical Investigation on the Bearing Capacity of Axially Compressive Concrete-Filled Steel Tubular Columns with Local Corrosion |
| title_sort | experimental and numerical investigation on the bearing capacity of axially compressive concrete filled steel tubular columns with local corrosion |
| topic | concrete-filled steel tubular local corrosion axial compression test finite element analysis bearing capacity calculation |
| url | https://www.mdpi.com/2075-5309/14/11/3628 |
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