Abstract
To enhance the re-centering capability of sliding-lead rubber bearing (sliding-LRB) comprising the sliding device and LRB in series and overcome the degradation of the widely used Nitinol (NiTi) wires at low temperatures, a novel copper aluminum beryllium wire-based sliding lead rubber bearing (CuAlBe-SLRB) is proposed for seismic protection of bridges in cold regions. The re-centering performance is achieved by adding the superelastic CuAlBe wires into the sliding-LRB. The numerical model is developed and verified using the experimental results of the sliding-LRB and CuAlBe wire, respectively. A numerical searching method is suggested to design the optimal parameters of CuAlBe-SLRB system. Nonlinear dynamic analyses are conducted to investigate the seismic response of bridges with CuAlBe-SLRBs for varying isolation periods. The responses of the bridges with CuAlBe-SLRBs and sliding-LRBs are compared. Results reveal that the CuAlBe-SLRB system is more effective to enhance the bridge performance than the sliding-LRB system against earthquakes and dependable restorability can be achieved in cold regions.
Original language | English |
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Article number | 113102 |
Journal | Engineering Structures |
Volume | 247 |
DOIs | |
Publication status | Published - 15 Nov 2021 |
Externally published | Yes |
Keywords
- Bridge
- CuAlBe-SLRB
- Low temperature effect
- Parametric design
- Seismic isolation and mitigation
- Superelasticity
ASJC Scopus subject areas
- Civil and Structural Engineering