Superelastic CuAlBe wire-based sliding lead rubber bearings for seismic isolation of bridges in cold regions

Wenzhi Zheng, Hao Wang, Hong Hao, Kaiming Bi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

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 languageEnglish
Article number113102
JournalEngineering Structures
Volume247
DOIs
Publication statusPublished - 15 Nov 2021
Externally publishedYes

Keywords

  • Bridge
  • CuAlBe-SLRB
  • Low temperature effect
  • Parametric design
  • Seismic isolation and mitigation
  • Superelasticity

ASJC Scopus subject areas

  • Civil and Structural Engineering

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