Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies
Variations in damper configuration strategies have a direct impact on the seismic damage patterns of long-span deck-type concrete-filled steel tube (CFST) arch bridges. This study developed an analysis and evaluation framework to identify the damage category, state, and progression sequence of struc...
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2025-08-01
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| author | Bin Zhao Longhua Zeng Qingyun Chen Chao Gan Lueqin Xu Guosi Cheng |
| author_facet | Bin Zhao Longhua Zeng Qingyun Chen Chao Gan Lueqin Xu Guosi Cheng |
| author_sort | Bin Zhao |
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| description | Variations in damper configuration strategies have a direct impact on the seismic damage patterns of long-span deck-type concrete-filled steel tube (CFST) arch bridges. This study developed an analysis and evaluation framework to identify the damage category, state, and progression sequence of structural components. The framework aims to investigate the influence of viscous dampers on the seismic response and damage patterns of long-span deck-type CFST arch bridges under near-fault pulse-like ground motions. The effects of different viscous damper configuration strategies and design parameters on seismic responses of long-span deck-type CFST arch bridges were systematically investigated, and the preferred configuration and parameter set were identified. The influence of preferred viscous damper configurations on seismic damage patterns of long-span deck-type CFST arch bridges was systematically analyzed through the established analysis and evaluation frameworks. The results indicate that a relatively optimal reduction in bridge response can be achieved when viscous dampers are simultaneously installed at both the abutments and the approach piers. Minimum seismic responses were attained at a damping exponent α = 0.2 and damping coefficient C = 6000 kN/(m/s), demonstrating stability in mitigating vibration effects on arch rings and bearings. In the absence of damper implementation, the lower chord arch foot section is most likely to experience in-plane bending failure. The piers, influenced by the coupling effect between the spandrel construction and the main arch ring, are more susceptible to damage as their height decreases. Additionally, the end bearings are more prone to failure compared to the central-span bearings. Implementation of the preferred damper configuration strategy maintains essentially consistent sequences in seismic-induced damage patterns of the bridge, but the peak ground motion intensity causing damage to the main arch and spandrel structure is significantly increased. This strategy enhances the damage-initiation peak ground acceleration (PGA) for critical sections of the main arch, while concurrently reducing transverse and longitudinal bending moments in pier column sections. The proposed integrated analysis and evaluation framework has been validated for its applicability in capturing the seismic damage patterns of long-span deck-type CFST arch bridges. |
| format | Article |
| id | doaj-art-84acc31cb5224df2bbc82828c5422880 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-08-01 |
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| series | Buildings |
| spelling | doaj-art-84acc31cb5224df2bbc82828c54228802025-08-20T04:00:53ZengMDPI AGBuildings2075-53092025-08-011515272810.3390/buildings15152728Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration StrategiesBin Zhao0Longhua Zeng1Qingyun Chen2Chao Gan3Lueqin Xu4Guosi Cheng5China Railway First Group Co., Ltd., Xi’an 710054, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaChina Railway First Group Co., Ltd., Xi’an 710054, ChinaCCCC Second Harbor Engineering Company, Ltd., Wuhan 430014, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaVariations in damper configuration strategies have a direct impact on the seismic damage patterns of long-span deck-type concrete-filled steel tube (CFST) arch bridges. This study developed an analysis and evaluation framework to identify the damage category, state, and progression sequence of structural components. The framework aims to investigate the influence of viscous dampers on the seismic response and damage patterns of long-span deck-type CFST arch bridges under near-fault pulse-like ground motions. The effects of different viscous damper configuration strategies and design parameters on seismic responses of long-span deck-type CFST arch bridges were systematically investigated, and the preferred configuration and parameter set were identified. The influence of preferred viscous damper configurations on seismic damage patterns of long-span deck-type CFST arch bridges was systematically analyzed through the established analysis and evaluation frameworks. The results indicate that a relatively optimal reduction in bridge response can be achieved when viscous dampers are simultaneously installed at both the abutments and the approach piers. Minimum seismic responses were attained at a damping exponent α = 0.2 and damping coefficient C = 6000 kN/(m/s), demonstrating stability in mitigating vibration effects on arch rings and bearings. In the absence of damper implementation, the lower chord arch foot section is most likely to experience in-plane bending failure. The piers, influenced by the coupling effect between the spandrel construction and the main arch ring, are more susceptible to damage as their height decreases. Additionally, the end bearings are more prone to failure compared to the central-span bearings. Implementation of the preferred damper configuration strategy maintains essentially consistent sequences in seismic-induced damage patterns of the bridge, but the peak ground motion intensity causing damage to the main arch and spandrel structure is significantly increased. This strategy enhances the damage-initiation peak ground acceleration (PGA) for critical sections of the main arch, while concurrently reducing transverse and longitudinal bending moments in pier column sections. The proposed integrated analysis and evaluation framework has been validated for its applicability in capturing the seismic damage patterns of long-span deck-type CFST arch bridges.https://www.mdpi.com/2075-5309/15/15/2728long-span CFST arch bridgesanalysis and evaluation frameworkdamage patternsIDA curves |
| spellingShingle | Bin Zhao Longhua Zeng Qingyun Chen Chao Gan Lueqin Xu Guosi Cheng Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies Buildings long-span CFST arch bridges analysis and evaluation framework damage patterns IDA curves |
| title | Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies |
| title_full | Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies |
| title_fullStr | Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies |
| title_full_unstemmed | Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies |
| title_short | Seismic Damage Pattern Analysis of Long-Span CFST Arch Bridges Based on Damper Configuration Strategies |
| title_sort | seismic damage pattern analysis of long span cfst arch bridges based on damper configuration strategies |
| topic | long-span CFST arch bridges analysis and evaluation framework damage patterns IDA curves |
| url | https://www.mdpi.com/2075-5309/15/15/2728 |
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