Seismic response of a base isolated cable-stayed bridge under near-fault ground motion excitations / Ahad Javanmardi … [et al.].

Javanmardi, Ahad and Ibrahim, Zainab and Gheadi, Khaled and Gordan, Meisam and Jameel, Mohammed and Hanif, Usman (2018) Seismic response of a base isolated cable-stayed bridge under near-fault ground motion excitations / Ahad Javanmardi … [et al.]. Scientific Research Journal, 15 (1). pp. 1-14. ISSN 1675-7009


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Nowadays, development of cable-stayed bridges is increasing around the world. The mitigation of seismic forces to these bridges are obligatory to prevent damages or failure of its structural members. Herein, this paper aimed to determine the near-fault ground motion effect on an existing cablestayed bridge equipped with lead-rubber bearing. In this context, Shipshaw cable-stayed bridge is selected as the case study. The selected bridge has a span of 183.2 m composite deck and 43 m height of steel tower. 2D finite element models of the non-isolated and base isolated bridges are modelled by using SAP2000. Three different near-fault ground motions which are Tabas 1978, Cape Mendocino 1992 and Kobe 1995 were subjected to the 2D FEM models in order to determine the seismic behaviour of the bridge. The near-fault ground motions were applied to the bridge in the longitudinal direction. Nonlinear dynamic analysis was performed to determine the dynamic responses of the bridge. Comparison of dynamic response of nonisolated and base isolated bridge under three different near-fault ground motions were conducted. The results obtained from numerical analyses of the bridge showed that the isolation system lengthened the period of bridge and minimised deck displacement, base shear and base moment of the bridge. It is concluded that the isolation system significantly reduced the destructive effects of near-fault ground motions on the bridge.

Item Type: Article
Javanmardi, AhadUNSPECIFIED
Ibrahim, ZainabUNSPECIFIED
Jameel, MohammedUNSPECIFIED
Subjects: Q Science > QE Geology > Dynamic and structural geology
Q Science > QE Geology > Earthquake hazard analysis
Divisions: Institute of Research Management and Innovation (IRMI)
Journal or Publication Title: Scientific Research Journal
ISSN: 1675-7009
Volume: 15
Number: 1
Page Range: pp. 1-14
Item ID: 21286
Uncontrolled Keywords: Cable-stayed bridges, seismic isolation, nonlinear dynamic analysis, seismic performance
Last Modified: 16 Aug 2018 06:45
Depositing User: Admin Pendigitan 2 PTAR

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