Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures
The concentrated transverse load may lead to the web crippling of pultruded GFRP sections due to the lower transverse mechanical properties. Several investigations have been conducted on the web-crippling behavior of the GFRP sections under room temperature. However, the web-crippling behavior is no...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/23/5313 |
| _version_ | 1797462252566085632 |
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| author | Lingfeng Zhang Qianyi Li Ying Long Dafu Cao Kai Guo |
| author_facet | Lingfeng Zhang Qianyi Li Ying Long Dafu Cao Kai Guo |
| author_sort | Lingfeng Zhang |
| collection | DOAJ |
| description | The concentrated transverse load may lead to the web crippling of pultruded GFRP sections due to the lower transverse mechanical properties. Several investigations have been conducted on the web-crippling behavior of the GFRP sections under room temperature. However, the web-crippling behavior is not yet understood when subjected to elevated temperatures. To address this issue, a finite element model considering the temperature-dependent material properties, Hashin failure criterion and the damage evolution law are successfully developed to simulate the web-crippling behavior of the GFRP I sections under elevated temperatures. The numerical model was validated by the web-crippling experiments at room temperature with the end-two-flange (ETF) and end bearing with ground support (EG) loading configurations. The developed model can accurately predict the ultimate loads and failure modes. Moreover, it was found that the initial damage was triggered by exceeding the shear strength at the web-flange junction near the corner of the bearing plate and independent of the elevated temperatures and loading configurations. The ultimate load and stiffness decreased obviously with the increasing temperature. At 220 °C, the ultimate load of specimens under ETF and EG loading configurations significantly decreased by 57% and 62%, respectively, whereas the elastic stiffness obviously reduced by 87% and 88%, respectively. |
| first_indexed | 2024-03-09T17:33:52Z |
| format | Article |
| id | doaj.art-7f0667ff17fc407992d69a4785516a65 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T17:33:52Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-7f0667ff17fc407992d69a4785516a652023-11-24T12:02:00ZengMDPI AGPolymers2073-43602022-12-011423531310.3390/polym14235313Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated TemperaturesLingfeng Zhang0Qianyi Li1Ying Long2Dafu Cao3Kai Guo4College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaDepartment of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, ItalyThe concentrated transverse load may lead to the web crippling of pultruded GFRP sections due to the lower transverse mechanical properties. Several investigations have been conducted on the web-crippling behavior of the GFRP sections under room temperature. However, the web-crippling behavior is not yet understood when subjected to elevated temperatures. To address this issue, a finite element model considering the temperature-dependent material properties, Hashin failure criterion and the damage evolution law are successfully developed to simulate the web-crippling behavior of the GFRP I sections under elevated temperatures. The numerical model was validated by the web-crippling experiments at room temperature with the end-two-flange (ETF) and end bearing with ground support (EG) loading configurations. The developed model can accurately predict the ultimate loads and failure modes. Moreover, it was found that the initial damage was triggered by exceeding the shear strength at the web-flange junction near the corner of the bearing plate and independent of the elevated temperatures and loading configurations. The ultimate load and stiffness decreased obviously with the increasing temperature. At 220 °C, the ultimate load of specimens under ETF and EG loading configurations significantly decreased by 57% and 62%, respectively, whereas the elastic stiffness obviously reduced by 87% and 88%, respectively.https://www.mdpi.com/2073-4360/14/23/5313fiber-reinforced polymerpultrusionelevated temperatureweb cripplingend-two-flange (ETF)end bearing with ground support (EG) |
| spellingShingle | Lingfeng Zhang Qianyi Li Ying Long Dafu Cao Kai Guo Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures Polymers fiber-reinforced polymer pultrusion elevated temperature web crippling end-two-flange (ETF) end bearing with ground support (EG) |
| title | Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures |
| title_full | Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures |
| title_fullStr | Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures |
| title_full_unstemmed | Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures |
| title_short | Modelling of Web-Crippling Behavior of Pultruded GFRP I Sections at Elevated Temperatures |
| title_sort | modelling of web crippling behavior of pultruded gfrp i sections at elevated temperatures |
| topic | fiber-reinforced polymer pultrusion elevated temperature web crippling end-two-flange (ETF) end bearing with ground support (EG) |
| url | https://www.mdpi.com/2073-4360/14/23/5313 |
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