Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder
In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Infrastructures |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2412-3811/5/4/32 |
| _version_ | 1797571744306823168 |
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| author | Mohammad Abedin Armin B. Mehrabi |
| author_facet | Mohammad Abedin Armin B. Mehrabi |
| author_sort | Mohammad Abedin |
| collection | DOAJ |
| description | In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper. |
| first_indexed | 2024-03-10T20:44:51Z |
| format | Article |
| id | doaj.art-591efd5b6d3e4207a6e5e52d983a3c99 |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-03-10T20:44:51Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-591efd5b6d3e4207a6e5e52d983a3c992023-11-19T20:23:48ZengMDPI AGInfrastructures2412-38112020-04-01543210.3390/infrastructures5040032Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured GirderMohammad Abedin0Armin B. Mehrabi1Department of Civil and Environmental Engineering, Florida International University, Miami, FL 33174, USADepartment of Civil and Environmental Engineering, Florida International University, Miami, FL 33174, USAIn steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper.https://www.mdpi.com/2412-3811/5/4/32steel bridgesfracturecross-frameredundancy evaluationload distributionfinite element analysis |
| spellingShingle | Mohammad Abedin Armin B. Mehrabi Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder Infrastructures steel bridges fracture cross-frame redundancy evaluation load distribution finite element analysis |
| title | Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder |
| title_full | Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder |
| title_fullStr | Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder |
| title_full_unstemmed | Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder |
| title_short | Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder |
| title_sort | effect of cross frames on load distribution of steel bridges with fractured girder |
| topic | steel bridges fracture cross-frame redundancy evaluation load distribution finite element analysis |
| url | https://www.mdpi.com/2412-3811/5/4/32 |
| work_keys_str_mv | AT mohammadabedin effectofcrossframesonloaddistributionofsteelbridgeswithfracturedgirder AT arminbmehrabi effectofcrossframesonloaddistributionofsteelbridgeswithfracturedgirder |