Abstract
Fatigue Life Assessment of an existing railway steel truss bridge near Dumdum, Kolkata is presented. The deterministic approach using the Palmgren–Miner rule and probabilistic approach by (i) available probabilistic formulations and (ii) direct Monte Carlo Simulation (MCS) have been adopted in the study. The bridge is unique of its type since the movement of traffic is transverse to the main span of the truss. The truss bridge is modeled in STAADPro.V8i SS5 with a moving load of (i) coal rakes, (ii) Passenger rakes, and (iii) EMU cars. The train running schedule, composition of train and loading is obtained from the Indian Railway. After analysis, the stress range time spectra is obtained and the reservoir method is applied to evaluate the damage. Also, the probability of fatigue failure of the bridge is estimated which indicates a risk of 77% damage of the critical members after 80 years. It is observed that fatigue failure is supposed to occur in between 80 and 90 years of service. The probabilistic approach with direct MCS yields the most conservative prediction.
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The authors gratefully acknowledge the Indian Railway for sharing the information on the considered bridge, loading on the bridge, train schedule, and other uncertainty information.
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Chanda, M., Misra, K.C., Bhattacharjya, S. (2020). Fatigue Life Assessment of an Existing Railway Bridge in India Incorporating Uncertainty. In: Singh, B., Roy, A., Maiti, D. (eds) Recent Advances in Theoretical, Applied, Computational and Experimental Mechanics. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-1189-9_12
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DOI: https://doi.org/10.1007/978-981-15-1189-9_12
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