Abstract
This paper is a comparative case study of seismic fragility surfaces of a railway-bridge piers considering without and with the soil-structure interaction effect. Lateral and horizontal stiffness has been calculated layer-wise as the soil profile. Dynamic shear modulus has been calculated using EERA. 3D modelling of the bridge has been formed in the CSiBridge and the stiffness due to soil has been applied as spring models. The pier tip displacement and rotation are considered as the guiding parameters for the study. A set of scaled ground-motion data has been used to perform non-linear time history analysis. Lognormal relationship has been established between the demand spectral acceleration Sa with the control parameters by multiple linear regression method. Fragility surfaces have been generated for both the cases. The result shows that soil-structure interaction effect reduces the damage probability. The effect depends on soil type. The variation is marginal in soft soil case. The pier tip rotation is guiding criteria for without soil effect but rotation effects more in soil effect.
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Das, S., Sil, A. (2022). Comparative Seismic Fragility Study of Railway Concrete Bridge Piers Without and with the Effect of Soil-Structure Interaction. In: Dey, A.K., Mandal, J.J., Manna, B. (eds) Proceedings of the 7th Indian Young Geotechnical Engineers Conference. IYGEC 2019. Lecture Notes in Civil Engineering, vol 195. Springer, Singapore. https://doi.org/10.1007/978-981-16-6456-4_39
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DOI: https://doi.org/10.1007/978-981-16-6456-4_39
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