Numerical study on the end rotation effect of elastomeric bearings on their mechanical behavior in flexible bridges

Document Type : Research Article

Authors

1 Associate Prof.

2 MSc, Dept. of Civill Engg, Amirkabir University Tehran, Iran

Abstract

When elastomeric bearings support the deck of long-spans or tall pier bridges, they experience end rotation and it can change the seismic performance of the whole isolated system. So far, the behavior of these bearings has been numerically modeled under individual actions (compression, shear, or bending) or combined compression and shear load. However, the effect of end rotation on the response of elastomeric bearings and its numerical model in combination with different load actions have not been considered well. In the current study, we used a two-dimensional mechanical model of elastomeric bearings that simulate the effect of end rotation in the combined action of pressure, shear and end rotation. The test results indicate that bearing rotational stiffness increases with the increasing vertical load but decreases with increasing shear deformation. Further, end rotation does not affect the critical displacement appreciably, but it significantly influences the critical shear force.

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Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 1
April 2022
Pages 75-94

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