具自適性能先進隔減震構造系統之研發與性能評估-應用勁度可變式滑動隔震支承於曲線橋梁之減震研究及耐震性能評估(子計畫六)(I)

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
StatusFinished
Effective start/end date1/08/2131/07/22

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):

  • SDG 11 - Sustainable Cities and Communities
  • SDG 13 - Climate Action
  • SDG 17 - Partnerships for the Goals

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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