Impact of ground motion characteristics on the seismic fragility of circular tunnels
The seismic performance of tunnel structure can be examined by fragility analysis, which determines the probability that demand will exceed capacity for a given hazard intensity. Although it is commonly understood that earthquake uncertainties dominate fragility features, the implication of ground m...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-10-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S246796742500056X |
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| author | Zhong-Kai Huang Dong-Mei Zhang Wu-Yu Zhang Yong-Bo Li |
| author_facet | Zhong-Kai Huang Dong-Mei Zhang Wu-Yu Zhang Yong-Bo Li |
| author_sort | Zhong-Kai Huang |
| collection | DOAJ |
| description | The seismic performance of tunnel structure can be examined by fragility analysis, which determines the probability that demand will exceed capacity for a given hazard intensity. Although it is commonly understood that earthquake uncertainties dominate fragility features, the implication of ground motion characteristics on the shield tunnel fragility analysis has not been comprehensively explored. Thus, this study aims to compare the effects of various earthquake characteristics on the fragility of the investigated shield tunnels. To this end, a typical shield tunnel was chosen and modelled using the finite element software. In addition, to account for typical ground motion characteristics, various ground motion sets, including near-field no plus motions (NFNP), near-field motions with a pulse (NFP), and far-field motions (FF), are selected, and a fragility analysis was assessed for every set of ground motion. The fragility curves were generated employing peak ground acceleration (PGA) as the intensity measure (IM) and tunnel drift as the damage measure (DM). The findings indicate that shield tunnels subjected to NFP may be more vulnerable compared to those subjected to NFNP and FF ground motions. This study’s findings highlight the vital role of ground motion characteristics in evaluating the fragility of shield tunnels. Moreover, the results may inform future seismic risk and resiliency evaluations regarding the importance of considering or disregarding the impacts of ground motion characteristics on tunnel vulnerability. |
| format | Article |
| id | doaj-art-da2b720107ef43a380b4338fc049a86f |
| institution | DOAJ |
| issn | 2467-9674 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj-art-da2b720107ef43a380b4338fc049a86f2025-08-20T02:48:58ZengKeAi Communications Co., Ltd.Underground Space2467-96742025-10-012418019610.1016/j.undsp.2024.09.008Impact of ground motion characteristics on the seismic fragility of circular tunnelsZhong-Kai Huang0Dong-Mei Zhang1Wu-Yu Zhang2Yong-Bo Li3Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, China; College of Civil Engineering and Water Resources, Qinghai University, Qinghai 810016, China; Corresponding author at: Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China.College of Civil Engineering and Water Resources, Qinghai University, Qinghai 810016, ChinaCCCC Tunnel Engineering Bureau Co., Ltd., Shanghai 200332, ChinaThe seismic performance of tunnel structure can be examined by fragility analysis, which determines the probability that demand will exceed capacity for a given hazard intensity. Although it is commonly understood that earthquake uncertainties dominate fragility features, the implication of ground motion characteristics on the shield tunnel fragility analysis has not been comprehensively explored. Thus, this study aims to compare the effects of various earthquake characteristics on the fragility of the investigated shield tunnels. To this end, a typical shield tunnel was chosen and modelled using the finite element software. In addition, to account for typical ground motion characteristics, various ground motion sets, including near-field no plus motions (NFNP), near-field motions with a pulse (NFP), and far-field motions (FF), are selected, and a fragility analysis was assessed for every set of ground motion. The fragility curves were generated employing peak ground acceleration (PGA) as the intensity measure (IM) and tunnel drift as the damage measure (DM). The findings indicate that shield tunnels subjected to NFP may be more vulnerable compared to those subjected to NFNP and FF ground motions. This study’s findings highlight the vital role of ground motion characteristics in evaluating the fragility of shield tunnels. Moreover, the results may inform future seismic risk and resiliency evaluations regarding the importance of considering or disregarding the impacts of ground motion characteristics on tunnel vulnerability.http://www.sciencedirect.com/science/article/pii/S246796742500056XGround motion characteristicsShield tunnelSeismic vulnerabilityResilience assessment |
| spellingShingle | Zhong-Kai Huang Dong-Mei Zhang Wu-Yu Zhang Yong-Bo Li Impact of ground motion characteristics on the seismic fragility of circular tunnels Underground Space Ground motion characteristics Shield tunnel Seismic vulnerability Resilience assessment |
| title | Impact of ground motion characteristics on the seismic fragility of circular tunnels |
| title_full | Impact of ground motion characteristics on the seismic fragility of circular tunnels |
| title_fullStr | Impact of ground motion characteristics on the seismic fragility of circular tunnels |
| title_full_unstemmed | Impact of ground motion characteristics on the seismic fragility of circular tunnels |
| title_short | Impact of ground motion characteristics on the seismic fragility of circular tunnels |
| title_sort | impact of ground motion characteristics on the seismic fragility of circular tunnels |
| topic | Ground motion characteristics Shield tunnel Seismic vulnerability Resilience assessment |
| url | http://www.sciencedirect.com/science/article/pii/S246796742500056X |
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