Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions
In this paper, the seismic response of a steel truss arch bridge subjected to near-fault ground motions is studied. Then, the idea of applying buckling restrained braces (BRBs) to a steel truss arch bridge in near-fault areas is proposed and validated. Firstly, the basic characteristics of near-faul...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/12/2147 |
| _version_ | 1797461167906488320 |
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| author | Haoyuan Gao Kun Zhang Xinyu Wu Hongjiang Liu Lianzhen Zhang |
| author_facet | Haoyuan Gao Kun Zhang Xinyu Wu Hongjiang Liu Lianzhen Zhang |
| author_sort | Haoyuan Gao |
| collection | DOAJ |
| description | In this paper, the seismic response of a steel truss arch bridge subjected to near-fault ground motions is studied. Then, the idea of applying buckling restrained braces (BRBs) to a steel truss arch bridge in near-fault areas is proposed and validated. Firstly, the basic characteristics of near-fault ground motions are identified and distinguished. Furthermore, the seismic response of a long span steel truss arch bridge in the near fault area is analyzed by elastic-plastic time analysis. Finally, the braces prone to buckling failure are replaced by BRBs to reduce the seismic response of the arch rib through their energy dissipation properties. Four BRB schemes were proposed with different yield strengths, but the same initial stiffness. The basic period of the structure remains the same. The results show that near-fault ground motion will not only obviously increase the displacement and internal force response of the bridge, but also cause more braces to buckle. By replacing a portion of the normal bars with BRBs, the internal forces and displacements of the arch ribs can be reduced to some extent, which is more prominent under the action of pulsed ground motion. There is a clear correlation between the damping effect and the parameters of BRB, so an optimized solution should be obtained by comparison and calculation. |
| first_indexed | 2024-03-09T17:15:34Z |
| format | Article |
| id | doaj.art-ba42431773aa458f84a5f3b2b1e533a9 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T17:15:34Z |
| publishDate | 2022-12-01 |
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| record_format | Article |
| series | Buildings |
| spelling | doaj.art-ba42431773aa458f84a5f3b2b1e533a92023-11-24T13:42:37ZengMDPI AGBuildings2075-53092022-12-011212214710.3390/buildings12122147Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground MotionsHaoyuan Gao0Kun Zhang1Xinyu Wu2Hongjiang Liu3Lianzhen Zhang4College of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Engineering, University of Auckland, Auckland 1023, New ZealandShenyang Geotechnical Investigation & Surveying Research Institute Co., Ltd., Shenyang 110004, ChinaCollege of Civil, Environmental and Land Magement Engineering, Polytechnic University of Milan, 20133 Milan, ItalyCollege of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150096, ChinaIn this paper, the seismic response of a steel truss arch bridge subjected to near-fault ground motions is studied. Then, the idea of applying buckling restrained braces (BRBs) to a steel truss arch bridge in near-fault areas is proposed and validated. Firstly, the basic characteristics of near-fault ground motions are identified and distinguished. Furthermore, the seismic response of a long span steel truss arch bridge in the near fault area is analyzed by elastic-plastic time analysis. Finally, the braces prone to buckling failure are replaced by BRBs to reduce the seismic response of the arch rib through their energy dissipation properties. Four BRB schemes were proposed with different yield strengths, but the same initial stiffness. The basic period of the structure remains the same. The results show that near-fault ground motion will not only obviously increase the displacement and internal force response of the bridge, but also cause more braces to buckle. By replacing a portion of the normal bars with BRBs, the internal forces and displacements of the arch ribs can be reduced to some extent, which is more prominent under the action of pulsed ground motion. There is a clear correlation between the damping effect and the parameters of BRB, so an optimized solution should be obtained by comparison and calculation.https://www.mdpi.com/2075-5309/12/12/2147near-fault ground motionforward-directivity effectfling-step effectsteel truss arch bridgebuckling restrained brace |
| spellingShingle | Haoyuan Gao Kun Zhang Xinyu Wu Hongjiang Liu Lianzhen Zhang Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions Buildings near-fault ground motion forward-directivity effect fling-step effect steel truss arch bridge buckling restrained brace |
| title | Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions |
| title_full | Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions |
| title_fullStr | Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions |
| title_full_unstemmed | Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions |
| title_short | Application of BRB to Seismic Mitigation of Steel Truss Arch Bridge Subjected to Near-Fault Ground Motions |
| title_sort | application of brb to seismic mitigation of steel truss arch bridge subjected to near fault ground motions |
| topic | near-fault ground motion forward-directivity effect fling-step effect steel truss arch bridge buckling restrained brace |
| url | https://www.mdpi.com/2075-5309/12/12/2147 |
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