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Seismic fragility analysis of deteriorating recycled aggregate concrete bridge columns subjected to freeze-thaw cycles
https://orcid.org/0000-0001-9024-9560
Highlights The seismic performance of RAC bridge columns after FTCs was simulated. The fragility of RAC bridge columns after FTCs was investigated. The effects of FTCs and RCA on the fragility of RAC bridge columns were discussed.
Abstract In cold regions, concrete structural deterioration due to freeze-thaw damage is a common problem. To investigate the seismic performance of recycled aggregate concrete (RAC) members in a freeze-thaw environment, the seismic fragility analysis of RAC bridge columns with different recycled coarse aggregate (RCA) replacement ratios subjected to freeze-thaw cycles (FTCs) was performed by the cloud analysis method. The results show that, compared with peak ground acceleration, setting the peak ground velocity as the intensity measurement provided a better correlation with the damage measure when developing the probabilistic seismic demand model. Additionally, the fragility of all RAC bridge columns before FTCs were almost the same; as the FTCs increased, the fragility gradually increased and became increasingly significant as the RCA replacement ratios increased. Finally, the fragility analysis in this paper can provide a good reference for the seismic performance evaluation of RAC members in cold regions.
Seismic fragility analysis of deteriorating recycled aggregate concrete bridge columns subjected to freeze-thaw cycles
https://orcid.org/0000-0001-9024-9560
Highlights The seismic performance of RAC bridge columns after FTCs was simulated. The fragility of RAC bridge columns after FTCs was investigated. The effects of FTCs and RCA on the fragility of RAC bridge columns were discussed.
Abstract In cold regions, concrete structural deterioration due to freeze-thaw damage is a common problem. To investigate the seismic performance of recycled aggregate concrete (RAC) members in a freeze-thaw environment, the seismic fragility analysis of RAC bridge columns with different recycled coarse aggregate (RCA) replacement ratios subjected to freeze-thaw cycles (FTCs) was performed by the cloud analysis method. The results show that, compared with peak ground acceleration, setting the peak ground velocity as the intensity measurement provided a better correlation with the damage measure when developing the probabilistic seismic demand model. Additionally, the fragility of all RAC bridge columns before FTCs were almost the same; as the FTCs increased, the fragility gradually increased and became increasingly significant as the RCA replacement ratios increased. Finally, the fragility analysis in this paper can provide a good reference for the seismic performance evaluation of RAC members in cold regions.
Seismic fragility analysis of deteriorating recycled aggregate concrete bridge columns subjected to freeze-thaw cycles
https://orcid.org/0000-0001-9024-9560
Highlights The seismic performance of RAC bridge columns after FTCs was simulated. The fragility of RAC bridge columns after FTCs was investigated. The effects of FTCs and RCA on the fragility of RAC bridge columns were discussed.
Abstract In cold regions, concrete structural deterioration due to freeze-thaw damage is a common problem. To investigate the seismic performance of recycled aggregate concrete (RAC) members in a freeze-thaw environment, the seismic fragility analysis of RAC bridge columns with different recycled coarse aggregate (RCA) replacement ratios subjected to freeze-thaw cycles (FTCs) was performed by the cloud analysis method. The results show that, compared with peak ground acceleration, setting the peak ground velocity as the intensity measurement provided a better correlation with the damage measure when developing the probabilistic seismic demand model. Additionally, the fragility of all RAC bridge columns before FTCs were almost the same; as the FTCs increased, the fragility gradually increased and became increasingly significant as the RCA replacement ratios increased. Finally, the fragility analysis in this paper can provide a good reference for the seismic performance evaluation of RAC members in cold regions.
Seismic fragility analysis of deteriorating recycled aggregate concrete bridge columns subjected to freeze-thaw cycles
Liu, Kaihua (author) / Yan, Jiachuan (author) / Alam, M. Shahria (author) / Zou, Chaoying (author)
Engineering Structures ; 187 ; 1-15
2019-01-30
15 pages
Article (Journal)
Electronic Resource
English
Recycled aggregate concrete , Freeze-thaw cycles , Fragility analysis , Cloud analysis , Seismic performance , RAC , recycled aggregate concrete , RCA , recycled coarse aggregate , NCA , natural coarse aggregate , FTC , freeze-thaw cycle , CDW , construction and demolition waste , EMV , equivalent mortar volume , RDME , relative dynamic modulus elasticity , FEA , finite element analysis , PSDM , probabilistic seismic demand model , DM , demand measure , IM , intensity measure , EDP , engineering demand parameter , CM , seismic capacity , PGA , peak ground acceleration , PGV , peak ground velocity
Durability of Structural Recycled Aggregate Concrete Subjected to Freeze-Thaw Cycles
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