Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion
Corrosion significantly affects the structural behavior of members in a connection (i.e., the thickness of steel plates, the preload force of bolts, and the friction factor of steel plates). Safety assessment of corroded steel frames (i.e., beam-to-column connection, beams, or columns) has been a ma...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/12/2122 |
| _version_ | 1797461135017902080 |
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| author | Zhengyi Kong Ya Jin Shaozheng Hong Quanwei Liu Quang-Viet Vu Seung-Eock Kim |
| author_facet | Zhengyi Kong Ya Jin Shaozheng Hong Quanwei Liu Quang-Viet Vu Seung-Eock Kim |
| author_sort | Zhengyi Kong |
| collection | DOAJ |
| description | Corrosion significantly affects the structural behavior of members in a connection (i.e., the thickness of steel plates, the preload force of bolts, and the friction factor of steel plates). Safety assessment of corroded steel frames (i.e., beam-to-column connection, beams, or columns) has been a major concern in engineering. In this work, an experiment of accelerated corrosion testing is carried out to obtain corroded specimens connected with high-strength bolts, and the preload force of high-strength bolts (PF-HSB) is monitored throughout the whole stage of the corrosion testing. Before the corrosion testing, the PF-HSB caused by the stress relaxation is also recorded. The PF-HSB decreases rapidly in the first five hours after the final screwing of bolts and it keeps stable after 100 h. The PF-HSB is seriously affected by corrosion, which decreases by 30.0% of the original preload force when the corrosion rate of steel plate reaches 3.5%. A finite element method for predicting the PF-HSB after corrosion is proposed. An estimation model for the PF-HSB considering the stress relaxation is established. A degradation model for predicting the PF-HSB after corrosion is also suggested, and is in good agreement with experimental data. The results of this research are of great significance for the safety assessment of in-service steel structures. |
| first_indexed | 2024-03-09T17:15:06Z |
| format | Article |
| id | doaj.art-4283904ce29b433a93582838cdede8ec |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T17:15:06Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-4283904ce29b433a93582838cdede8ec2023-11-24T13:42:10ZengMDPI AGBuildings2075-53092022-12-011212212210.3390/buildings12122122Degradation Behavior of the Preload Force of High-Strength Bolts after CorrosionZhengyi Kong0Ya Jin1Shaozheng Hong2Quanwei Liu3Quang-Viet Vu4Seung-Eock Kim5Department of Civil Engineering, Anhui University of Technology, Ma’anshan 243032, ChinaDepartment of Civil Engineering, Anhui University of Technology, Ma’anshan 243032, ChinaDepartment of Civil Engineering, Anhui University of Technology, Ma’anshan 243032, ChinaDepartment of Civil Engineering, Anhui University of Technology, Ma’anshan 243032, ChinaFaculty of Civil Engineering, Vietnam Maritime University, Hai Phong 180000, VietnamDepartment of Civil and Environmental Engineering, Sejong University, Seoul 143747, Republic of KoreaCorrosion significantly affects the structural behavior of members in a connection (i.e., the thickness of steel plates, the preload force of bolts, and the friction factor of steel plates). Safety assessment of corroded steel frames (i.e., beam-to-column connection, beams, or columns) has been a major concern in engineering. In this work, an experiment of accelerated corrosion testing is carried out to obtain corroded specimens connected with high-strength bolts, and the preload force of high-strength bolts (PF-HSB) is monitored throughout the whole stage of the corrosion testing. Before the corrosion testing, the PF-HSB caused by the stress relaxation is also recorded. The PF-HSB decreases rapidly in the first five hours after the final screwing of bolts and it keeps stable after 100 h. The PF-HSB is seriously affected by corrosion, which decreases by 30.0% of the original preload force when the corrosion rate of steel plate reaches 3.5%. A finite element method for predicting the PF-HSB after corrosion is proposed. An estimation model for the PF-HSB considering the stress relaxation is established. A degradation model for predicting the PF-HSB after corrosion is also suggested, and is in good agreement with experimental data. The results of this research are of great significance for the safety assessment of in-service steel structures.https://www.mdpi.com/2075-5309/12/12/2122high-strength boltscorrosionpreload forcestress relaxationdegradation model |
| spellingShingle | Zhengyi Kong Ya Jin Shaozheng Hong Quanwei Liu Quang-Viet Vu Seung-Eock Kim Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion Buildings high-strength bolts corrosion preload force stress relaxation degradation model |
| title | Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion |
| title_full | Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion |
| title_fullStr | Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion |
| title_full_unstemmed | Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion |
| title_short | Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion |
| title_sort | degradation behavior of the preload force of high strength bolts after corrosion |
| topic | high-strength bolts corrosion preload force stress relaxation degradation model |
| url | https://www.mdpi.com/2075-5309/12/12/2122 |
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