Development of Brazilian highway live load model for unlimited fatigue life
Abstract This work studies the fatigue live load model used in Brazil for highway bridges. Using the unlimited fatigue life approach, the current live load model is evaluated in relation to the actual traffic and a new fatigue live load model is proposed. Weigh-in-motion (WIM) stations data on two i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Instituto Brasileiro do Concreto (IBRACON)
2020-08-01
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| Series: | Revista IBRACON de Estruturas e Materiais |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000400213&tlng=en |
| _version_ | 1818889315613147136 |
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| author | Anselmo Leal Carneiro Enson de Lima Portela Túlio Nogueira Bittencourt |
| author_facet | Anselmo Leal Carneiro Enson de Lima Portela Túlio Nogueira Bittencourt |
| author_sort | Anselmo Leal Carneiro |
| collection | DOAJ |
| description | Abstract This work studies the fatigue live load model used in Brazil for highway bridges. Using the unlimited fatigue life approach, the current live load model is evaluated in relation to the actual traffic and a new fatigue live load model is proposed. Weigh-in-motion (WIM) stations data on two important Brazilian highways are used. The main structural analysis performed in this paper consider the bridges as box girders or multiple girders. The ratio between real traffic and the live load model load effect (bias factor) are determined for single and continuous spans in terms of bending moment and shear force. It is found that the bias factor of the current live load can vary a lot and may not ensure unlimited fatigue life. The proposed model, on the other hand, presents more uniform bias factors and is in accordance with the unlimited fatigue life approach for the WIM data. |
| first_indexed | 2024-12-19T17:07:04Z |
| format | Article |
| id | doaj.art-43ad91cfd6e64d65a5584153e48b157a |
| institution | Directory Open Access Journal |
| issn | 1983-4195 |
| language | English |
| last_indexed | 2024-12-19T17:07:04Z |
| publishDate | 2020-08-01 |
| publisher | Instituto Brasileiro do Concreto (IBRACON) |
| record_format | Article |
| series | Revista IBRACON de Estruturas e Materiais |
| spelling | doaj.art-43ad91cfd6e64d65a5584153e48b157a2022-12-21T20:13:08ZengInstituto Brasileiro do Concreto (IBRACON)Revista IBRACON de Estruturas e Materiais1983-41952020-08-0113410.1590/s1983-41952020000400007Development of Brazilian highway live load model for unlimited fatigue lifeAnselmo Leal Carneirohttps://orcid.org/0000-0002-6196-1142Enson de Lima Portelahttps://orcid.org/0000-0002-1822-8244Túlio Nogueira Bittencourthttps://orcid.org/0000-0001-6523-2687Abstract This work studies the fatigue live load model used in Brazil for highway bridges. Using the unlimited fatigue life approach, the current live load model is evaluated in relation to the actual traffic and a new fatigue live load model is proposed. Weigh-in-motion (WIM) stations data on two important Brazilian highways are used. The main structural analysis performed in this paper consider the bridges as box girders or multiple girders. The ratio between real traffic and the live load model load effect (bias factor) are determined for single and continuous spans in terms of bending moment and shear force. It is found that the bias factor of the current live load can vary a lot and may not ensure unlimited fatigue life. The proposed model, on the other hand, presents more uniform bias factors and is in accordance with the unlimited fatigue life approach for the WIM data.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000400213&tlng=enhighway bridgesfatiguelive loadweigh-in-motion |
| spellingShingle | Anselmo Leal Carneiro Enson de Lima Portela Túlio Nogueira Bittencourt Development of Brazilian highway live load model for unlimited fatigue life Revista IBRACON de Estruturas e Materiais highway bridges fatigue live load weigh-in-motion |
| title | Development of Brazilian highway live load model for unlimited fatigue life |
| title_full | Development of Brazilian highway live load model for unlimited fatigue life |
| title_fullStr | Development of Brazilian highway live load model for unlimited fatigue life |
| title_full_unstemmed | Development of Brazilian highway live load model for unlimited fatigue life |
| title_short | Development of Brazilian highway live load model for unlimited fatigue life |
| title_sort | development of brazilian highway live load model for unlimited fatigue life |
| topic | highway bridges fatigue live load weigh-in-motion |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000400213&tlng=en |
| work_keys_str_mv | AT anselmolealcarneiro developmentofbrazilianhighwayliveloadmodelforunlimitedfatiguelife AT ensondelimaportela developmentofbrazilianhighwayliveloadmodelforunlimitedfatiguelife AT tulionogueirabittencourt developmentofbrazilianhighwayliveloadmodelforunlimitedfatiguelife |