Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads
Bridges can suffer partial or even total collapse when bridge piers, as crucial load-bearing bridge components, are hit by vehicles or ships. Concrete-filled double-skin steel tubular columns (CFDSTCs) offer high bearing capacity and good fire resistance, exhibit excellent mechanical properties unde...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524012993 |
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| author | Yongtao Mi Huiqi Ren Chenxi Sun Jian Zhao Weiqiang Wang Zailin Yang Yicun Chen |
| author_facet | Yongtao Mi Huiqi Ren Chenxi Sun Jian Zhao Weiqiang Wang Zailin Yang Yicun Chen |
| author_sort | Yongtao Mi |
| collection | DOAJ |
| description | Bridges can suffer partial or even total collapse when bridge piers, as crucial load-bearing bridge components, are hit by vehicles or ships. Concrete-filled double-skin steel tubular columns (CFDSTCs) offer high bearing capacity and good fire resistance, exhibit excellent mechanical properties under separate collision or blast load, and have broad application prospects in bridge structures. However, in extreme cases, CFDSTCs can be subjected to coupled collision and blast (CCB) loads, initiating coupling effects. In this study, the dynamic behavior and residual performance of CFDSTCs under CCB loads were investigated. First, the reliability of the numerical model was validated on the basis of existing experimental results. Second, the damage propagation process of CFDSTCs subjected to the separate collision and CCB loads was investigated, and the patterns of damage, deflection (D), and impact force (F) time histories were comparatively analyzed. The performance level of CFDSTCs after the CCB loads was determined based on the damage index thresholds. Finally, the primary determinants affecting the dynamic behavior and residual performance of CFDSTCs were investigated. The results showed that compared with the sum of the deflections under the separate collision and blast loads, the maximum deflection and residual deflection under CCB loads increased by 6.1 mm and 7.8 mm, respectively. |
| format | Article |
| id | doaj-art-77ad3892d3b445cb814ac86926b85e45 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-77ad3892d3b445cb814ac86926b85e452025-01-04T04:56:22ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04147Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loadsYongtao Mi0Huiqi Ren1Chenxi Sun2Jian Zhao3Weiqiang Wang4Zailin Yang5Yicun Chen6College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaInstitute of Defense Engineering, AMS, PLA, Beijing 100850, ChinaInstitute of Defense Engineering, AMS, PLA, Beijing 100850, ChinaInstitute of Defense Engineering, AMS, PLA, Beijing 100850, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China; Corresponding author.Institute of Defense Engineering, AMS, PLA, Beijing 100850, China; Army Engineering University of PLA, Nanjing 210007, PR China; Corresponding author at: Institute of Defense Engineering, AMS, PLA, Beijing 100850, China.Bridges can suffer partial or even total collapse when bridge piers, as crucial load-bearing bridge components, are hit by vehicles or ships. Concrete-filled double-skin steel tubular columns (CFDSTCs) offer high bearing capacity and good fire resistance, exhibit excellent mechanical properties under separate collision or blast load, and have broad application prospects in bridge structures. However, in extreme cases, CFDSTCs can be subjected to coupled collision and blast (CCB) loads, initiating coupling effects. In this study, the dynamic behavior and residual performance of CFDSTCs under CCB loads were investigated. First, the reliability of the numerical model was validated on the basis of existing experimental results. Second, the damage propagation process of CFDSTCs subjected to the separate collision and CCB loads was investigated, and the patterns of damage, deflection (D), and impact force (F) time histories were comparatively analyzed. The performance level of CFDSTCs after the CCB loads was determined based on the damage index thresholds. Finally, the primary determinants affecting the dynamic behavior and residual performance of CFDSTCs were investigated. The results showed that compared with the sum of the deflections under the separate collision and blast loads, the maximum deflection and residual deflection under CCB loads increased by 6.1 mm and 7.8 mm, respectively.http://www.sciencedirect.com/science/article/pii/S2214509524012993CFDSTCSeparate collisionCoupled loadsResidual performanceDamage assessment |
| spellingShingle | Yongtao Mi Huiqi Ren Chenxi Sun Jian Zhao Weiqiang Wang Zailin Yang Yicun Chen Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads Case Studies in Construction Materials CFDSTC Separate collision Coupled loads Residual performance Damage assessment |
| title | Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads |
| title_full | Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads |
| title_fullStr | Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads |
| title_full_unstemmed | Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads |
| title_short | Dynamic behavior and residual performance of CFDSTCs under coupled collision and blast loads |
| title_sort | dynamic behavior and residual performance of cfdstcs under coupled collision and blast loads |
| topic | CFDSTC Separate collision Coupled loads Residual performance Damage assessment |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524012993 |
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