Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP
The majority of experimental and analytical studies on fiber-reinforced polymer (FRP) confined concrete has largely concentrated on plain (unreinforced) small-scale concrete columns, on which the efficiency of strengthening is much higher compared with large-scale columns. Although reinforced concre...
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| Online Access: | https://www.mdpi.com/1996-1944/14/13/3498 |
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| author | Haytham F. Isleem Muhammad Abid Wesam Salah Alaloul Muhammad Kamal Shah Shayan Zeb Muhammad Ali Musarat Muhammad Faisal Javed Fahid Aslam Hisham Alabduljabbar |
| author_facet | Haytham F. Isleem Muhammad Abid Wesam Salah Alaloul Muhammad Kamal Shah Shayan Zeb Muhammad Ali Musarat Muhammad Faisal Javed Fahid Aslam Hisham Alabduljabbar |
| author_sort | Haytham F. Isleem |
| collection | DOAJ |
| description | The majority of experimental and analytical studies on fiber-reinforced polymer (FRP) confined concrete has largely concentrated on plain (unreinforced) small-scale concrete columns, on which the efficiency of strengthening is much higher compared with large-scale columns. Although reinforced concrete (RC) columns subjected to combined axial compression and flexural loads (i.e., eccentric compression) are the most common structural elements used in practice, research on eccentrically-loaded FRP-confined rectangular RC columns has been much more limited. More specifically, the limited research has generally been concerned with small-scale RC columns, and hence, the proposed eccentric-loading stress-strain models were mainly based on the existing concentric-loading models of FRP-confined concrete columns of small scale. In the light of such demand to date, this paper is aimed at developing a mathematical model to better predict the strength of FRP-confined rectangular RC columns. The strain distribution of FRP around the circumference of the rectangular sections was investigated to propose equations for the actual rupture strain of FRP wrapped in the horizontal and vertical directions. The model was accomplished using 230 results of 155 tested specimens compiled from 19 studies available in the technical literature. The test database covers an unconfined concrete strength ranging between 9.9 and 73.1 MPa, and section’s dimension ranging from 100–300 mm and 125–435 mm for the short and long sides, respectively. Other test parameters, such as aspect ratio, corner radius, internal hoop steel reinforcement, FRP wrapping layout, and number of FRP wraps were all considered in the model. The performance of the model shows a very good correlation with the test results. |
| first_indexed | 2024-03-10T10:08:36Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:08:36Z |
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| series | Materials |
| spelling | doaj.art-882415c5dfc24693a66d5591529611522023-11-22T01:23:14ZengMDPI AGMaterials1996-19442021-06-011413349810.3390/ma14133498Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRPHaytham F. Isleem0Muhammad Abid1Wesam Salah Alaloul2Muhammad Kamal Shah3Shayan Zeb4Muhammad Ali Musarat5Muhammad Faisal Javed6Fahid Aslam7Hisham Alabduljabbar8Department of Civil Engineering, Tsinghua University, Beijing 100084, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaDepartment of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaDepartment of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaDepartment of Civil Engineering, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, PakistanDepartment of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi ArabiaDepartment of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi ArabiaThe majority of experimental and analytical studies on fiber-reinforced polymer (FRP) confined concrete has largely concentrated on plain (unreinforced) small-scale concrete columns, on which the efficiency of strengthening is much higher compared with large-scale columns. Although reinforced concrete (RC) columns subjected to combined axial compression and flexural loads (i.e., eccentric compression) are the most common structural elements used in practice, research on eccentrically-loaded FRP-confined rectangular RC columns has been much more limited. More specifically, the limited research has generally been concerned with small-scale RC columns, and hence, the proposed eccentric-loading stress-strain models were mainly based on the existing concentric-loading models of FRP-confined concrete columns of small scale. In the light of such demand to date, this paper is aimed at developing a mathematical model to better predict the strength of FRP-confined rectangular RC columns. The strain distribution of FRP around the circumference of the rectangular sections was investigated to propose equations for the actual rupture strain of FRP wrapped in the horizontal and vertical directions. The model was accomplished using 230 results of 155 tested specimens compiled from 19 studies available in the technical literature. The test database covers an unconfined concrete strength ranging between 9.9 and 73.1 MPa, and section’s dimension ranging from 100–300 mm and 125–435 mm for the short and long sides, respectively. Other test parameters, such as aspect ratio, corner radius, internal hoop steel reinforcement, FRP wrapping layout, and number of FRP wraps were all considered in the model. The performance of the model shows a very good correlation with the test results.https://www.mdpi.com/1996-1944/14/13/3498FRP-confined concreteFRP rupture strainrectangular sectionsstrength modeleccentric axial compressionlarge-scale RC columns |
| spellingShingle | Haytham F. Isleem Muhammad Abid Wesam Salah Alaloul Muhammad Kamal Shah Shayan Zeb Muhammad Ali Musarat Muhammad Faisal Javed Fahid Aslam Hisham Alabduljabbar Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP Materials FRP-confined concrete FRP rupture strain rectangular sections strength model eccentric axial compression large-scale RC columns |
| title | Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP |
| title_full | Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP |
| title_fullStr | Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP |
| title_full_unstemmed | Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP |
| title_short | Axial Compressive Strength Models of Eccentrically-Loaded Rectangular Reinforced Concrete Columns Confined with FRP |
| title_sort | axial compressive strength models of eccentrically loaded rectangular reinforced concrete columns confined with frp |
| topic | FRP-confined concrete FRP rupture strain rectangular sections strength model eccentric axial compression large-scale RC columns |
| url | https://www.mdpi.com/1996-1944/14/13/3498 |
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