Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method
The external prestressing method was developed to improve the load carrying capacity of concrete bridges damaged by ageing or other external environmental factors. Therefore, it is necessary to examine the performance of the structure before and after strengthening, and verification and confirmation...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/6/2478 |
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| author | Sang-Hyun Kim Jong-Sup Park Woo-Tai Jung Tae-Kyun Kim Hee-Beom Park |
| author_facet | Sang-Hyun Kim Jong-Sup Park Woo-Tai Jung Tae-Kyun Kim Hee-Beom Park |
| author_sort | Sang-Hyun Kim |
| collection | DOAJ |
| description | The external prestressing method was developed to improve the load carrying capacity of concrete bridges damaged by ageing or other external environmental factors. Therefore, it is necessary to examine the performance of the structure before and after strengthening, and verification and confirmation of the actual strengthening effect should be preceded. However, for reasons such as securing deteriorated bridges and the absence of design data, the strengthening effect of an actual bridge is rarely analyzed. Hence, in this study, the strengthening effect was verified by conducting a set of material property tests and four-point loading tests before and after strengthening of an actual bridge, which had been utilized for over 45 years. As a result, it was determined that confirming the strengthening effect before cracking is challenging due to the nature of the external prestressing method, which has an insignificant effect on the stiffness; however, the effect of increasing the crack load of the external prestressing method was experimentally verified. The result of the study is expected to contribute to the determination of the load carrying capacity and required strengthening amount when strengthening existing prestressed concrete girder bridges. |
| first_indexed | 2024-03-10T13:21:53Z |
| format | Article |
| id | doaj.art-04b309e96ffa451c9be0fe279d2c0ccc |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T13:21:53Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-04b309e96ffa451c9be0fe279d2c0ccc2023-11-21T09:57:38ZengMDPI AGApplied Sciences2076-34172021-03-01116247810.3390/app11062478Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing MethodSang-Hyun Kim0Jong-Sup Park1Woo-Tai Jung2Tae-Kyun Kim3Hee-Beom Park4Advanced Composites Research Center, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, KoreaAdvanced Composites Research Center, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, KoreaAdvanced Composites Research Center, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, KoreaAdvanced Composites Research Center, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, KoreaAdvanced Composites Research Center, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, KoreaThe external prestressing method was developed to improve the load carrying capacity of concrete bridges damaged by ageing or other external environmental factors. Therefore, it is necessary to examine the performance of the structure before and after strengthening, and verification and confirmation of the actual strengthening effect should be preceded. However, for reasons such as securing deteriorated bridges and the absence of design data, the strengthening effect of an actual bridge is rarely analyzed. Hence, in this study, the strengthening effect was verified by conducting a set of material property tests and four-point loading tests before and after strengthening of an actual bridge, which had been utilized for over 45 years. As a result, it was determined that confirming the strengthening effect before cracking is challenging due to the nature of the external prestressing method, which has an insignificant effect on the stiffness; however, the effect of increasing the crack load of the external prestressing method was experimentally verified. The result of the study is expected to contribute to the determination of the load carrying capacity and required strengthening amount when strengthening existing prestressed concrete girder bridges.https://www.mdpi.com/2076-3417/11/6/2478strengthening methodstrengthening effectexternal prestressingdeteriorated bridge |
| spellingShingle | Sang-Hyun Kim Jong-Sup Park Woo-Tai Jung Tae-Kyun Kim Hee-Beom Park Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method Applied Sciences strengthening method strengthening effect external prestressing deteriorated bridge |
| title | Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method |
| title_full | Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method |
| title_fullStr | Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method |
| title_full_unstemmed | Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method |
| title_short | Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method |
| title_sort | experimental study on strengthening effect analysis of a deteriorated bridge using external prestressing method |
| topic | strengthening method strengthening effect external prestressing deteriorated bridge |
| url | https://www.mdpi.com/2076-3417/11/6/2478 |
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