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Abstract:
Here, a new kind of self-reset and friction energy-dissipating pedestal used on top of fixed pier of a continuous girder bridge was proposed. Its vertical support and longitudinal functional components were separated and independent, and its self-reset and friction energy-dissipating functions were completed with reset spring and winding cable, respectively. The constitutive model of the pedestal was analyzed theoretically to study the force-displacement relation of its each component, and discuss these components' working states during daily use and earthquake coming, respectively. Continuous girder bridge model with scale of 1:30, and self-reset and friction energy-dissipating pedestal model were designed and fabricated. The shaking table loading tests were conducted to contrastively investigate bending moment response at pier bottom, displacement response at girder end and girder body self-reset effect of the traditional continuous girder bridge model and the continuous girder bridge model with self-reset and friction energy-dissipating pedestals. The results showed that the self-reset and friction energy-dissipating pedestal can have clear constitutive relationship and force transmission path; the continuous girder bridge with this kind of pedestals can have an excellent aseismic effect on pier bottom bending moment, and a better aseismic effect on girder end displacement, and reveal good self-reset effect after earthquake; the proposed self-reset and friction energy-dissipating pedestal can provide a new idea for bridge pedestals with seismic reduction and isolation functions in the future. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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Journal of Vibration and Shock
ISSN: 1000-3835
Year: 2021
Issue: 23
Volume: 40
Page: 83-90
Cited Count:
SCOPUS Cited Count: 7
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4
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