Investigating the Effect of Near-Fault Earthquake Parameters on the Behavior of Horizontally Curved Bridges

Document Type : Research Article

Authors

Department of Civil Engineering, Semnan University, Semnan, Iran

Abstract

To design safe transportation systems, it is unavoidable to completely recognize the complicated behaviors of bridges under an earthquake. The past earthquakes showed that horizontally curved bridges are highly affected by earthquakes, especially near-fault earthquakes, due to irregular geometry. The previous studies indicated that magnitude; PGV and Tp < /sub> have been the most effective near-fault-earthquake parameters. In the present study, attempts were made to determine the effect of these parameters on such bridges using a verified software model by a field test and analyzing two horizontally curved bridges. Three suites of near-fault records were used to conduct time-history analysis with three parameters, namely magnitude, PGV, and Tp < /sub>. In each suite, two of these parameters are almost constant, and the third parameter is variable to observe its effect on the result. The results indicated that the change in PGV has the most significant effect on the behaviors of such bridges. Also, the effect of Tp < /sub> increases in longer bridges. If the difference between the lateral displacement of two ends of the deck is considered as criteria for assessing the potential of deck rotation, increasing in bridge length and being in a near-fault area can lead to an increase in bridge deck rotation behavior up to 2.37 and 2.47 times, respectively.

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References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 1
April 2021
Pages 247-260

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