Open Access
ARTICLE
Evaluation of Fatigue Remaining Life of Typical steel plate girder Bridge under Railway Loading
N. K. Banjara1, S. Sasmal2
1 CSIR-Structural Engineering Research Centre, TTTI Post, Chennai, India, 600113,
nawal1234@gmail.com
2 Corresponding Author: Bridge Engineering Division, CSIR-Structural Engineering Research Centre, TTTI Post, Chennai, India, 600113, sasmalsap@gmail.com, saptarshi@serc.res.in
Structural Longevity 2013, 10(3), 151-166. https://doi.org/10.3970/sl.2013.010.151
Abstract
This paper presents various fatigue damage models available in the
literature for calculating the damage index due to fatigue loading. Discussion on
the effect of load level, load sequence and load interaction on the fatigue damage of
the bridges is also presented. Experimental studies conducted to obtain the strain
responses at the different critical sections of a typical steel plate girder bridge under
railway loadings are briefly described. Strain time histories obtained at different
locations including at the weld zone are used to evaluate the fatigue remaining life
of the bridge considered in this study. Load spectrum is developed by considering
different types of railway loadings and under different speeds. It has been found
that in low stress-low cycle cases, which are very common in bridges, the damage
indices obtained by using different models proposed by researchers are not in close
agreement and sometimes, the results are unrealistic since the low stress variations
obtained from the experiments need to be considered. Further, it is opined that
an exclusive model is necessary for such cases which can facilitate to reasonably
calculate the fatigue remaining life of bridges.
Keywords
Cite This Article
Banjara, N. K., Sasmal, S. (2013). Evaluation of Fatigue Remaining Life of Typical steel plate girder Bridge under Railway Loading.
Structural Longevity, 10(3), 151–166. https://doi.org/10.3970/sl.2013.010.151