Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners
To study the mechanical properties of asymmetric K-shaped square tubular joints with built-in stiffening rib lap joints, axial tensile tests were carried out on one K-shaped joint without built-in stiffening ribs and four K-shaped joints with built-in stiffening ribs using an electro-hydraulic servo...
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MDPI AG
2025-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/10/1634 |
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| author | Zhihua Zhong Peiyu Peng Zheweng Zhu Xiang Ao Shiwei Xiong Jinkun Huang Lihong Zhou Xiaochuan Bai |
| author_facet | Zhihua Zhong Peiyu Peng Zheweng Zhu Xiang Ao Shiwei Xiong Jinkun Huang Lihong Zhou Xiaochuan Bai |
| author_sort | Zhihua Zhong |
| collection | DOAJ |
| description | To study the mechanical properties of asymmetric K-shaped square tubular joints with built-in stiffening rib lap joints, axial tensile tests were carried out on one K-shaped joint without built-in stiffening ribs and four K-shaped joints with built-in stiffening ribs using an electro-hydraulic servo structural testing system. The effects of the addition of stiffening ribs and the welding method of the stiffening ribs on the mechanical properties were studied comparatively. The failure mode of the K-shaped joint was obtained, and the strain distribution and peak displacement reaction force in the nodal region were analyzed. A finite element analysis of the K-shaped joint was carried out, and the finite element results were compared with the experimental results. The results showed that the addition of transverse reinforcement ribs and more complete welds shared the squeezing effect of the brace on the chord. Arranging more reinforcing ribs in the fittings makes the chord more uniformly stressed and absorbs more energy while increasing the flexural load capacity of the fittings’ side plates. The presence of a weld gives a short-lived temperature increase in the area around the crack, and the buckling of the structure causes the surface temperature in the buckling area to continue to increase for some time. The temperature change successfully localized where the structure was deforming and creating cracks. The addition of the reinforcing ribs resulted in a change in the deformation pattern of the model, and the difference occurred because the flexural capacity of the brace with the added reinforcing ribs was greater than that of the side plate buckling. |
| format | Article |
| id | doaj-art-89a02c68c65b498784b2674ad0010bd9 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-89a02c68c65b498784b2674ad0010bd92025-08-20T01:56:29ZengMDPI AGBuildings2075-53092025-05-011510163410.3390/buildings15101634Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In StiffenersZhihua Zhong0Peiyu Peng1Zheweng Zhu2Xiang Ao3Shiwei Xiong4Jinkun Huang5Lihong Zhou6Xiaochuan Bai7Ganzhou Expressway Co., Ltd., Ganzhou 341000, ChinaGanzhou Expressway Co., Ltd., Ganzhou 341000, ChinaJiangxi Province Jiaotou Maintenance Technology Group Co., Ltd., Nanchang 330000, ChinaGanzhou Expressway Co., Ltd., Ganzhou 341000, ChinaJiangxi Province Jiaotou Maintenance Technology Group Co., Ltd., Nanchang 330000, ChinaChina MCC17 Group Co., Ltd., Maanshan 243000, ChinaCivil Engn Deptartment, Nanchang Institute Sci & Technol, Nanchang 330108, ChinaCivil Engn Deptartment, Yancheng Institute of Technology, Yancheng 224001, ChinaTo study the mechanical properties of asymmetric K-shaped square tubular joints with built-in stiffening rib lap joints, axial tensile tests were carried out on one K-shaped joint without built-in stiffening ribs and four K-shaped joints with built-in stiffening ribs using an electro-hydraulic servo structural testing system. The effects of the addition of stiffening ribs and the welding method of the stiffening ribs on the mechanical properties were studied comparatively. The failure mode of the K-shaped joint was obtained, and the strain distribution and peak displacement reaction force in the nodal region were analyzed. A finite element analysis of the K-shaped joint was carried out, and the finite element results were compared with the experimental results. The results showed that the addition of transverse reinforcement ribs and more complete welds shared the squeezing effect of the brace on the chord. Arranging more reinforcing ribs in the fittings makes the chord more uniformly stressed and absorbs more energy while increasing the flexural load capacity of the fittings’ side plates. The presence of a weld gives a short-lived temperature increase in the area around the crack, and the buckling of the structure causes the surface temperature in the buckling area to continue to increase for some time. The temperature change successfully localized where the structure was deforming and creating cracks. The addition of the reinforcing ribs resulted in a change in the deformation pattern of the model, and the difference occurred because the flexural capacity of the brace with the added reinforcing ribs was greater than that of the side plate buckling.https://www.mdpi.com/2075-5309/15/10/1634failure modeK-shaped jointtemperature changeweld |
| spellingShingle | Zhihua Zhong Peiyu Peng Zheweng Zhu Xiang Ao Shiwei Xiong Jinkun Huang Lihong Zhou Xiaochuan Bai Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners Buildings failure mode K-shaped joint temperature change weld |
| title | Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners |
| title_full | Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners |
| title_fullStr | Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners |
| title_full_unstemmed | Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners |
| title_short | Axial Tensile Experiment of the Lap-Type Asymmetric K-Shaped Square Tubular Joints with Built-In Stiffeners |
| title_sort | axial tensile experiment of the lap type asymmetric k shaped square tubular joints with built in stiffeners |
| topic | failure mode K-shaped joint temperature change weld |
| url | https://www.mdpi.com/2075-5309/15/10/1634 |
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