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Effects of shear panel dampers on seismic response mitigation of high-speed railway simply supported bridge-track system under far-field and near-field ground motions

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Języki publikacji
EN
Abstrakty
EN
High-speed railway lines always have to cross the seismic zone with great earthquake risks leading to serious consequences. A replaceable steel panel damper (SPD) is proposed as an energy-dissipation device to mitigate the structural seismic responses. It is simulated as a simplified nonlinear spring embedded in structural system with the force-displacement behavior derived by plate-beam theory. To investigate the effect of SPD, a typical 5-span high-speed railway simply supported bridge-track system (HSRSBTS) validated by a shaking table test is established by ANSYS. A novel damage measure, the system relative damage ratio (γSRD), is proposed to quantify the effect of SPD in the system and consider the potential component-level damage modes of both bending and shear. The structural system is investigated undergoing two ground motions suites in DBE- and MCE-level intensity, including both far-field and near-field records in transverse direction. The result indicates that a significant reduce (roughly 50%) of seismic response in rail and girder are contributed by SPD, while the system damage decreases about 10-15%, especially for near-field pulse-like ground motions with high intensity. The energy-dissipation capacity of SPDs with various configurations is examined to optimize the properties of SPD. It generally decreases with the increase in the elastic stiffness ratio r of the SPD to the fixed support, and the r = 2-2.5 are recommended in engineering practice. SPD is an effective and efficient device of structure to be adopted as an energy-dissipation component and the first defense line under far-field and near-field ground motions.
Rocznik
Strony
art. no. e93, 2023
Opis fizyczny
Bibliogr. 42 poz., rys., tab., wykr.
Twórcy
  • School of Civil Engineering, Central South University, Changsha 410075, China
  • National Engineering Research Center of High-Speed Railway Construction Technology, Changsha 410075, China
autor
  • School of Civil Engineering, Central South University, Changsha 410075, China
  • School of Civil Engineering, Central South University, Changsha 410075, China
  • National Engineering Research Center of High-Speed Railway Construction Technology, Changsha 410075, China
autor
  • School of Civil Engineering, Central South University, Changsha 410075, China
autor
  • School of Civil Engineering, Central South University, Changsha 410075, China
  • School of Civil Engineering, Central South University of Forestry and Technology, Changsha 410004, China
autor
  • China Railway Eryuan Engineering Group CO. LTD, Chengdu 610031, China
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Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-a4c7b651-4a59-482d-a095-2f7363779502
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