Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage
An extensive numerical study was carried out due to the concern that head-sectional damage caused by corrosion poses a threat to the tensile performance of headed stud connectors. Three-dimensional finite element models of pull-out tests were established, with both material and geometric nonlinearit...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2802 |
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| author | Xiaoqing Xu Shanwen Zeng Wei He Zhujian Hou Dongyang He Tao Yang |
| author_facet | Xiaoqing Xu Shanwen Zeng Wei He Zhujian Hou Dongyang He Tao Yang |
| author_sort | Xiaoqing Xu |
| collection | DOAJ |
| description | An extensive numerical study was carried out due to the concern that head-sectional damage caused by corrosion poses a threat to the tensile performance of headed stud connectors. Three-dimensional finite element models of pull-out tests were established, with both material and geometric nonlinearities being considered. In particular, the concrete weak region due to bleeding was simulated. The simulation method was verified by the results of pull-out tests on two connectors with different damage degrees. Tensile performance of headed stud shear connectors of various shaft diameters (<i>d</i><sub>s</sub> = 10 to 25 mm) with various damage degrees (up to 50%) was simulated. It was observed that the connector with a high damage degree exhibited low capacity and a failure closer to pull-out failure than concrete cone breakout failure. Based on the numerical results, reduction factors for quantitatively assessing the influence of head-sectional damage degree on the loading capacity and stiffness of connectors were proposed. With reference to the Concrete Capacity method, the reduction in tensile capacity of connectors with head-sectional damage was found to be caused by the decrease in the projected area of the concrete cone due to the reduction in head diameter, concrete cone angle, and embedment depth. Meanwhile, numerical results showed that the stiffness of a connector at a high embedment depth or in high strength concrete was more sensitive to head-sectional damage. It was also found that the elastic modulus of the weak region significantly affected the stiffness of connectors, while the influence of its thickness on the capacity and stiffness was insignificant. |
| first_indexed | 2024-03-09T13:22:56Z |
| format | Article |
| id | doaj.art-fcd1dd8f263e4243ad77a0d8d632c566 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:22:56Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-fcd1dd8f263e4243ad77a0d8d632c5662023-11-30T21:27:45ZengMDPI AGMaterials1996-19442022-04-01158280210.3390/ma15082802Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional DamageXiaoqing Xu0Shanwen Zeng1Wei He2Zhujian Hou3Dongyang He4Tao Yang5College of Civil Engineering, Tongji University, Shanghai 200092, ChinaSichuan Xiongzhou Industry Co., Ltd., Chengdu 641400, ChinaSichuan College of Architectural Technology, Deyang 618000, ChinaGuangxi Lewang Expressway Co., Ltd., Nanning 530004, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400045, ChinaGuangxi Key Laboratory of Disaster Prevention and Engineering Safety, Nanning 530004, ChinaAn extensive numerical study was carried out due to the concern that head-sectional damage caused by corrosion poses a threat to the tensile performance of headed stud connectors. Three-dimensional finite element models of pull-out tests were established, with both material and geometric nonlinearities being considered. In particular, the concrete weak region due to bleeding was simulated. The simulation method was verified by the results of pull-out tests on two connectors with different damage degrees. Tensile performance of headed stud shear connectors of various shaft diameters (<i>d</i><sub>s</sub> = 10 to 25 mm) with various damage degrees (up to 50%) was simulated. It was observed that the connector with a high damage degree exhibited low capacity and a failure closer to pull-out failure than concrete cone breakout failure. Based on the numerical results, reduction factors for quantitatively assessing the influence of head-sectional damage degree on the loading capacity and stiffness of connectors were proposed. With reference to the Concrete Capacity method, the reduction in tensile capacity of connectors with head-sectional damage was found to be caused by the decrease in the projected area of the concrete cone due to the reduction in head diameter, concrete cone angle, and embedment depth. Meanwhile, numerical results showed that the stiffness of a connector at a high embedment depth or in high strength concrete was more sensitive to head-sectional damage. It was also found that the elastic modulus of the weak region significantly affected the stiffness of connectors, while the influence of its thickness on the capacity and stiffness was insignificant.https://www.mdpi.com/1996-1944/15/8/2802headed studtension loadingdamagecorrosionconcrete cone capacitysimulation |
| spellingShingle | Xiaoqing Xu Shanwen Zeng Wei He Zhujian Hou Dongyang He Tao Yang Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage Materials headed stud tension loading damage corrosion concrete cone capacity simulation |
| title | Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage |
| title_full | Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage |
| title_fullStr | Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage |
| title_full_unstemmed | Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage |
| title_short | Numerical Study on the Tensile Performance of Headed Stud Shear Connectors with Head-Sectional Damage |
| title_sort | numerical study on the tensile performance of headed stud shear connectors with head sectional damage |
| topic | headed stud tension loading damage corrosion concrete cone capacity simulation |
| url | https://www.mdpi.com/1996-1944/15/8/2802 |
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