Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Research on Seismic Performance of Existing Skew Bridges Considering Performance Degradation of Laminated Bearings
Rubber bearings of bridges are easy to age and cause the degradation of their mechanical properties. To probe into the impact of laminated bearing degradation on the seismic response of in-service skew bridges, a finite element model of in-service skew bridges with laminated bearings of different aging time is established using Midas Civil software. With the aging time set up as 0, 3, 6, 9, 12, and 15 years, nonlinear time-history analysis is carried out with full consideration of the pile–soil interaction, structural pounding effect, and material nonlinearity in this paper. The results show that: 1. The aging of laminated bearings has an adverse effect on the seismic performance of skew bridges. With the aging of laminated bearings, the displacement of the main girder will increase and the rotational effects are strengthened, thereby leading to a greater risk of superstructure pounding. In severe cases, it may even result in the falling of girders. 2. To a certain extent, the aging of laminated bearings can reduce the risk of damage to the substructure of bridges in common earthquakes, providing protection to the piers and preventing serious damage to the piers as well as other substructures segments. 3. The aging of bearings of in-service skew bridges deserves great attention, and it is crucial to replace the aged laminated bearings promptly.
Research on Seismic Performance of Existing Skew Bridges Considering Performance Degradation of Laminated Bearings
Rubber bearings of bridges are easy to age and cause the degradation of their mechanical properties. To probe into the impact of laminated bearing degradation on the seismic response of in-service skew bridges, a finite element model of in-service skew bridges with laminated bearings of different aging time is established using Midas Civil software. With the aging time set up as 0, 3, 6, 9, 12, and 15 years, nonlinear time-history analysis is carried out with full consideration of the pile–soil interaction, structural pounding effect, and material nonlinearity in this paper. The results show that: 1. The aging of laminated bearings has an adverse effect on the seismic performance of skew bridges. With the aging of laminated bearings, the displacement of the main girder will increase and the rotational effects are strengthened, thereby leading to a greater risk of superstructure pounding. In severe cases, it may even result in the falling of girders. 2. To a certain extent, the aging of laminated bearings can reduce the risk of damage to the substructure of bridges in common earthquakes, providing protection to the piers and preventing serious damage to the piers as well as other substructures segments. 3. The aging of bearings of in-service skew bridges deserves great attention, and it is crucial to replace the aged laminated bearings promptly.
Research on Seismic Performance of Existing Skew Bridges Considering Performance Degradation of Laminated Bearings
Lecture Notes in Civil Engineering
Strauss, Eric (Herausgeber:in) / Wu, Gang (Autor:in) / Wang, Yiqin (Autor:in) / Zou, Youquan (Autor:in) / Wu, Bitao (Autor:in) / Liu, Xuzheng (Autor:in) / Ren, Liang (Autor:in)
International Conference on Civil Engineering ; 2024 ; Singapore, Singapore
Proceedings of the 8th International Conference on Civil Engineering ; Kapitel: 1 ; 3-17
01.10.2024
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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