Project Details
Description
In the past catastrophic earthquakes, isolated structures have been verified tohave high seismic performance than conventional non-isolated structures.However, although the induced seismic loading is reduced through the elongatednatural period, the unexpected larger response may occur during near-fieldground motions. The objective of this project is to apply the new sliding isolatorswith variable curvature (SIVC) to curved bridges for avoiding the resonantresponse under near-field excitations. Additionally, the deck displacement can bedecreased to avoid P-delta effect and pounding effect at expansion joints. Thestopper and anti-lifting device are also installed with SIVCs in parallel to restraintthe separation of the superstructure. For obtaining the optimum seismicperformance of the curved bridges with SIVCs, the numerical simulation isperformed using the nonlinear dynamic time-stepping method to investigate thesuitable bearing system. Shaking table testing is conducted to verify the isolationefficiency of SIVCs and the effect of stoppers and anti-lifting devices. In thisstudy, a simple, robust and highly efficient nonlinear dynamic time-steppingmethod is developed to analyze the 3D complicated structures with SIVCs andother structural control devices which exhibit highly nonlinear behavior duringearthquakes. Finally, an approach for probabilistic seismic performanceassessment for isolated bridges is proposed. It can be anticipated that the newbearing system is an excellent alternative scheme for the design of new curvedbridges, the retrofit of the exiting bridges, and the reconstruction of bridges afterearthquake disaster
Status | Finished |
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Effective start/end date | 1/08/21 → 31/07/22 |
UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):
Keywords
- curved bridge
- sliding isolator with variable curvature
- anti-lifting device
- stopper
- near-fault ground motion
- shaking table
- nonlinear dynamic analysis
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