Low-Cost Assessment Method for Existing Adjacent Beam Bridges
Damage in grouted joints is an unavoidable early disease in adjacent box beam bridges and hollow-core slab bridges. Joint damage will lead to degradation of the transverse load transmission capacity of the bridge, causing beams of the bridge superstructure to bear loads higher than the designed valu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/21/11304 |
| _version_ | 1797469125741641728 |
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| author | Siqi Wang Jinsheng Du Han Su |
| author_facet | Siqi Wang Jinsheng Du Han Su |
| author_sort | Siqi Wang |
| collection | DOAJ |
| description | Damage in grouted joints is an unavoidable early disease in adjacent box beam bridges and hollow-core slab bridges. Joint damage will lead to degradation of the transverse load transmission capacity of the bridge, causing beams of the bridge superstructure to bear loads higher than the designed value, and eventually fail prematurely. Precise assessment of bearing--capacity degradation degree of adjacent box beam bridges and hollow-core slab bridges that are of great number is the keypoint to maintaining the serviceability of traffic network. The current specifications regard grouted joints as individual components and cannot correctly assess the degradation degree of bearing capacity caused by joint damage. In this paper, the traditional hinge connected beam method is improved by modifying deformation compatibility conditions at grouted joints. By using a modified hinge connected beam method, the relationship of joints at different locations with the lateral load distribution factor (LLDF) is analyzed. Based on analysis results, this paper proposes a new low-cost assessment method and a new assessment index that can utilize visual inspection results. Based on the concept of standard deviation, the proposed method assesses the degradation degree of the lateral load transmission performance of bridge superstructures by calculating the variation in LLDFs of beams, which is expressed by the lateral load distribution performance rating number <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>L</mi><mi>D</mi><mi>N</mi></mrow></semantics></math></inline-formula>. The proposed method is applied to three real bridges. The accuracy of the calculation results is verified by comparing the ranking of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>L</mi><mi>D</mi><mi>N</mi><mi>s</mi></mrow></semantics></math></inline-formula> of three bridges with the ranking of the variation degrees of lateral deflection influence lines of three bridges obtained from static-load test results. |
| first_indexed | 2024-03-09T19:17:03Z |
| format | Article |
| id | doaj.art-586696cbef0949118a902e98a1de84eb |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T19:17:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-586696cbef0949118a902e98a1de84eb2023-11-24T03:41:26ZengMDPI AGApplied Sciences2076-34172022-11-0112211130410.3390/app122111304Low-Cost Assessment Method for Existing Adjacent Beam BridgesSiqi Wang0Jinsheng Du1Han Su2School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 100084, ChinaDamage in grouted joints is an unavoidable early disease in adjacent box beam bridges and hollow-core slab bridges. Joint damage will lead to degradation of the transverse load transmission capacity of the bridge, causing beams of the bridge superstructure to bear loads higher than the designed value, and eventually fail prematurely. Precise assessment of bearing--capacity degradation degree of adjacent box beam bridges and hollow-core slab bridges that are of great number is the keypoint to maintaining the serviceability of traffic network. The current specifications regard grouted joints as individual components and cannot correctly assess the degradation degree of bearing capacity caused by joint damage. In this paper, the traditional hinge connected beam method is improved by modifying deformation compatibility conditions at grouted joints. By using a modified hinge connected beam method, the relationship of joints at different locations with the lateral load distribution factor (LLDF) is analyzed. Based on analysis results, this paper proposes a new low-cost assessment method and a new assessment index that can utilize visual inspection results. Based on the concept of standard deviation, the proposed method assesses the degradation degree of the lateral load transmission performance of bridge superstructures by calculating the variation in LLDFs of beams, which is expressed by the lateral load distribution performance rating number <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>L</mi><mi>D</mi><mi>N</mi></mrow></semantics></math></inline-formula>. The proposed method is applied to three real bridges. The accuracy of the calculation results is verified by comparing the ranking of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>L</mi><mi>D</mi><mi>N</mi><mi>s</mi></mrow></semantics></math></inline-formula> of three bridges with the ranking of the variation degrees of lateral deflection influence lines of three bridges obtained from static-load test results.https://www.mdpi.com/2076-3417/12/21/11304adjacent box beam bridgeshollow-core slab bridgeslateral load distribution factorsbridge structural assessment |
| spellingShingle | Siqi Wang Jinsheng Du Han Su Low-Cost Assessment Method for Existing Adjacent Beam Bridges Applied Sciences adjacent box beam bridges hollow-core slab bridges lateral load distribution factors bridge structural assessment |
| title | Low-Cost Assessment Method for Existing Adjacent Beam Bridges |
| title_full | Low-Cost Assessment Method for Existing Adjacent Beam Bridges |
| title_fullStr | Low-Cost Assessment Method for Existing Adjacent Beam Bridges |
| title_full_unstemmed | Low-Cost Assessment Method for Existing Adjacent Beam Bridges |
| title_short | Low-Cost Assessment Method for Existing Adjacent Beam Bridges |
| title_sort | low cost assessment method for existing adjacent beam bridges |
| topic | adjacent box beam bridges hollow-core slab bridges lateral load distribution factors bridge structural assessment |
| url | https://www.mdpi.com/2076-3417/12/21/11304 |
| work_keys_str_mv | AT siqiwang lowcostassessmentmethodforexistingadjacentbeambridges AT jinshengdu lowcostassessmentmethodforexistingadjacentbeambridges AT hansu lowcostassessmentmethodforexistingadjacentbeambridges |