Investigating the behavior of the prequalified ConXL connection strengthened with T-stub
While the box-columns section provides significant advantages, including a low slenderness ratio that enhances buckling strength, high post-buckling strength, and excellent ductility, the implementation of continuous plates for moment-resisting frames presents a range of challenges. As a result, num...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Institution of Structural Engineers
2025
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| Online Access: | http://umpir.ump.edu.my/id/eprint/44750/ http://umpir.ump.edu.my/id/eprint/44750/1/Investigating%20the%20behavior%20of%20the%20prequalified%20ConXL.pdf |
| _version_ | 1848827174074712064 |
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| author | Ghamari, Ali Tavakoli, Sajad Putra Jaya, Ramadhansyah Thongchom, Chanachai |
| author_facet | Ghamari, Ali Tavakoli, Sajad Putra Jaya, Ramadhansyah Thongchom, Chanachai |
| author_sort | Ghamari, Ali |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | While the box-columns section provides significant advantages, including a low slenderness ratio that enhances buckling strength, high post-buckling strength, and excellent ductility, the implementation of continuous plates for moment-resisting frames presents a range of challenges. As a result, numerous solutions have been proposed to tackle these issues effectively. Among these, the ConXL connection has emerged as a particularly promising option, demonstrating superior performance and gaining widespread acceptance in the engineering community. This paper focuses on the ConXL connection, conducting a thorough examination of its properties and exploring innovative methods to enhance its performance through both numerical and parametric studies. Specifically, five distinct model types were analyzed: ConXL with Reduced Beam Section (RBS), ConXL without RBS, ConXL with T-stub, ConXL with T-stub and Concrete-Filled Tubular (CFT) columns, and web-connected models. The findings revealed that all variations of the ConXL configurations exhibited satisfactory performance, achieving a rotation capacity that exceeded 0.04 radians. In these instances, the capacity of the connections was shown to surpass 80 % of the plastic moment of the beam. Moreover, the integration of a T-stub significantly improved energy dissipation and ultimate strength within the connection. It was observed that substituting a conventional beam for an RBS increased stress levels in the panel zone and connections. However, optimal performance was attained by incorporating T-stubs into the designed columns, and it was noted that an unfilled column could be effectively utilized, provided that the thickness of the column is appropriately increased. |
| first_indexed | 2025-11-15T03:56:31Z |
| format | Article |
| id | ump-44750 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:56:31Z |
| publishDate | 2025 |
| publisher | Institution of Structural Engineers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-447502025-06-10T03:20:57Z http://umpir.ump.edu.my/id/eprint/44750/ Investigating the behavior of the prequalified ConXL connection strengthened with T-stub Ghamari, Ali Tavakoli, Sajad Putra Jaya, Ramadhansyah Thongchom, Chanachai TA Engineering (General). Civil engineering (General) While the box-columns section provides significant advantages, including a low slenderness ratio that enhances buckling strength, high post-buckling strength, and excellent ductility, the implementation of continuous plates for moment-resisting frames presents a range of challenges. As a result, numerous solutions have been proposed to tackle these issues effectively. Among these, the ConXL connection has emerged as a particularly promising option, demonstrating superior performance and gaining widespread acceptance in the engineering community. This paper focuses on the ConXL connection, conducting a thorough examination of its properties and exploring innovative methods to enhance its performance through both numerical and parametric studies. Specifically, five distinct model types were analyzed: ConXL with Reduced Beam Section (RBS), ConXL without RBS, ConXL with T-stub, ConXL with T-stub and Concrete-Filled Tubular (CFT) columns, and web-connected models. The findings revealed that all variations of the ConXL configurations exhibited satisfactory performance, achieving a rotation capacity that exceeded 0.04 radians. In these instances, the capacity of the connections was shown to surpass 80 % of the plastic moment of the beam. Moreover, the integration of a T-stub significantly improved energy dissipation and ultimate strength within the connection. It was observed that substituting a conventional beam for an RBS increased stress levels in the panel zone and connections. However, optimal performance was attained by incorporating T-stubs into the designed columns, and it was noted that an unfilled column could be effectively utilized, provided that the thickness of the column is appropriately increased. Institution of Structural Engineers 2025 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/44750/1/Investigating%20the%20behavior%20of%20the%20prequalified%20ConXL.pdf Ghamari, Ali and Tavakoli, Sajad and Putra Jaya, Ramadhansyah and Thongchom, Chanachai (2025) Investigating the behavior of the prequalified ConXL connection strengthened with T-stub. Structures, 78 (109391). pp. 1-13. ISSN 2352-0124. (In Press / Online First) (In Press / Online First) https://doi.org/10.1016/j.istruc.2025.109391 https://doi.org/10.1016/j.istruc.2025.109391 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Ghamari, Ali Tavakoli, Sajad Putra Jaya, Ramadhansyah Thongchom, Chanachai Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title | Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title_full | Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title_fullStr | Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title_full_unstemmed | Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title_short | Investigating the behavior of the prequalified ConXL connection strengthened with T-stub |
| title_sort | investigating the behavior of the prequalified conxl connection strengthened with t-stub |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://umpir.ump.edu.my/id/eprint/44750/ http://umpir.ump.edu.my/id/eprint/44750/ http://umpir.ump.edu.my/id/eprint/44750/ http://umpir.ump.edu.my/id/eprint/44750/1/Investigating%20the%20behavior%20of%20the%20prequalified%20ConXL.pdf |