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Computers and Concrete Volume 20, Number 4, October 2017 , pages 419-427 DOI: https://doi.org/10.12989/cac.2017.20.4.419 |
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Seismic evaluation of isolated skewed bridges using fragility function methodology |
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M. Bayat, F. Daneshjoo, N. Nisticò and J. Pejovic
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| Abstract | ||
| A methodology, based on fragility functions, is proposed to evaluate the seismic performance of seismic isolated 45o skewed concrete bridge: 1) twelve types of seismic isolation devices are considered based on two different design parameters 2) fragility functions of a three-span bridge with and without seismic isolation devices are analytically evaluated based on 3D nonlinear incremental dynamic analyses which seismic input consists of 20 selected ground motions. The optimum combinations of isolation device design parameters are identified comparing, for different limit states, the performance of 1) the Seismic Isolated Bridges (SIB) and 2) Not Seismic Isolated Bridge (NSIB) designed according to the AASHTO standards. | ||
| Key Words | ||
| skewed bridge; seismic isolation device; fragility function methodology; incremental dynamic analysis (IDA); isolation device design parameters | ||
| Address | ||
| M. Bayat: Young Researchers and Elite Club, Roudehen Branch, Islamic Azad University, Roudehen, Iran F. Daneshjoo: Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran N. Nisticò: Department of Structural and Geotechnical Engineering, Università degli Studi di Roma | ||