Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads
Integral abutment bridges (IABs) have many advantages over conventional bridges in terms of strength and maintenance cost. Due to the integrity of these structures uniform thermal and seismic loads are known important ones on the structure performance. Although all bridge design codes consider tempe...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/757608 |
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| author | Narges Easazadeh Far Majid Barghian |
| author_facet | Narges Easazadeh Far Majid Barghian |
| author_sort | Narges Easazadeh Far |
| collection | DOAJ |
| description | Integral abutment bridges (IABs) have many advantages over conventional bridges in terms of strength and maintenance cost. Due to the integrity of these structures uniform thermal and seismic loads are known important ones on the structure performance. Although all bridge design codes consider temperature and earthquake loads separately in their load combinations for conventional bridges, the thermal load is an “always on” load and, during the occurrence of an earthquake, these two important loads act on bridge simultaneously. Evaluating the safety level of IABs under combination of these loads becomes important. In this paper, the safety of IABs—designed by AASHTO LRFD bridge design code—under combination of thermal and seismic loads is studied. To fulfill this aim, first the target reliability indexes under seismic load have been calculated. Then, these analyses for the same bridge under combination of thermal and seismic loads have been repeated and the obtained reliability indexes are compared with target indexes. It is shown that, for an IAB designed by AASHTO LRFD, the indexes have been reduced under combined effects. So, the target level of safety during its design life is not provided and the code’s load combination should be changed. |
| format | Article |
| id | doaj-art-39ae541f495b41ed869523b7dd01b264 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-39ae541f495b41ed869523b7dd01b2642025-02-03T00:59:40ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/757608757608Safety Identifying of Integral Abutment Bridges under Seismic and Thermal LoadsNarges Easazadeh Far0Majid Barghian1Department of Structural Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz 5166616471, IranDepartment of Structural Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz 5166616471, IranIntegral abutment bridges (IABs) have many advantages over conventional bridges in terms of strength and maintenance cost. Due to the integrity of these structures uniform thermal and seismic loads are known important ones on the structure performance. Although all bridge design codes consider temperature and earthquake loads separately in their load combinations for conventional bridges, the thermal load is an “always on” load and, during the occurrence of an earthquake, these two important loads act on bridge simultaneously. Evaluating the safety level of IABs under combination of these loads becomes important. In this paper, the safety of IABs—designed by AASHTO LRFD bridge design code—under combination of thermal and seismic loads is studied. To fulfill this aim, first the target reliability indexes under seismic load have been calculated. Then, these analyses for the same bridge under combination of thermal and seismic loads have been repeated and the obtained reliability indexes are compared with target indexes. It is shown that, for an IAB designed by AASHTO LRFD, the indexes have been reduced under combined effects. So, the target level of safety during its design life is not provided and the code’s load combination should be changed.http://dx.doi.org/10.1155/2014/757608 |
| spellingShingle | Narges Easazadeh Far Majid Barghian Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads The Scientific World Journal |
| title | Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads |
| title_full | Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads |
| title_fullStr | Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads |
| title_full_unstemmed | Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads |
| title_short | Safety Identifying of Integral Abutment Bridges under Seismic and Thermal Loads |
| title_sort | safety identifying of integral abutment bridges under seismic and thermal loads |
| url | http://dx.doi.org/10.1155/2014/757608 |
| work_keys_str_mv | AT nargeseasazadehfar safetyidentifyingofintegralabutmentbridgesunderseismicandthermalloads AT majidbarghian safetyidentifyingofintegralabutmentbridgesunderseismicandthermalloads |