Design and Seismic Performance Study of Multistage Controllable Isolation Bearing for High-Speed Railway Simply Supported Beam DOI Creative Commons
Hanyun Liu, Jun Jiang, Na Mao

et al.

Buildings, Journal Year: 2024, Volume and Issue: 14(11), P. 3539 - 3539

Published: Nov. 5, 2024

The high-speed railway (HSR) system imposes stringent requirements for track smoothness. However, conventional seismic isolation bearings frequently fail to meet these demands. To address this challenge, a novel bearing was developed based on the principle of functional separation design. This innovative effectively achieves multistage control objectives, including amplitude limitation ensure smoothness during frequent earthquakes, energy dissipation guarantee train running safety design and structural integrity maintenance prevent beam collapse rare earthquakes. Firstly, an overview bearing’s operational is provided. Subsequently, corresponding mechanical model formulated, with parameters new determined through finite element analysis. study then compares performance general rubber bearing, using HSR simply supported bridge as engineering background. dynamic response under varying waves, pier heights, spans meticulously analyzed. results indicate that can achieve control. Compared bearings, it reduces displacement vibration by over 46.4% frequent, design, deformation earthquakes remains below 3 mm, thus meeting normal operations. Additionally, reveals higher heights increase response, peaking at 15 m. reduction provided varies but effective in most earthquake scenarios, maximum reductions 92.9% 74.17% bending moment. Furthermore, larger also 24 m span outperforming 32 bridge. In conclusion, significantly enhances bridges, ensuring reliability.

Language: Английский

Optimizing Seismic Performance in High-Speed Railway Simply Supported Beam Bridges with Combined Risk Transfer-Control Devices DOI
Lijun Xiong, Wangbao Zhou,

Lizhong Jiang

et al.

Journal of Earthquake Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 24

Published: March 24, 2025

Language: Английский

Citations

0
Seismic risk transfer in multi-span simply supported beam bridges for high-speed railways DOI
Lijun Xiong, Wangbao Zhou, Lizhong Jiang

et al.

Soil Dynamics and Earthquake Engineering, Journal Year: 2024, Volume and Issue: 188, P. 109057 - 109057

Published: Oct. 28, 2024

Language: Английский

Citations

1
Design and Seismic Performance Study of Multistage Controllable Isolation Bearing for High-Speed Railway Simply Supported Beam DOI Creative Commons
Hanyun Liu, Jun Jiang, Na Mao

et al.

Buildings, Journal Year: 2024, Volume and Issue: 14(11), P. 3539 - 3539

Published: Nov. 5, 2024

The high-speed railway (HSR) system imposes stringent requirements for track smoothness. However, conventional seismic isolation bearings frequently fail to meet these demands. To address this challenge, a novel bearing was developed based on the principle of functional separation design. This innovative effectively achieves multistage control objectives, including amplitude limitation ensure smoothness during frequent earthquakes, energy dissipation guarantee train running safety design and structural integrity maintenance prevent beam collapse rare earthquakes. Firstly, an overview bearing’s operational is provided. Subsequently, corresponding mechanical model formulated, with parameters new determined through finite element analysis. study then compares performance general rubber bearing, using HSR simply supported bridge as engineering background. dynamic response under varying waves, pier heights, spans meticulously analyzed. results indicate that can achieve control. Compared bearings, it reduces displacement vibration by over 46.4% frequent, design, deformation earthquakes remains below 3 mm, thus meeting normal operations. Additionally, reveals higher heights increase response, peaking at 15 m. reduction provided varies but effective in most earthquake scenarios, maximum reductions 92.9% 74.17% bending moment. Furthermore, larger also 24 m span outperforming 32 bridge. In conclusion, significantly enhances bridges, ensuring reliability.

Language: Английский

Citations

0