Analytical modeling of monolithic joints in concrete bridges |
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Authors: | D Timosidis S J Pantazopoulou |
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Institution: | (1) Department of Civil Engineering, Demokritus University of Thrace, Xanthi, 67100, Greece |
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Abstract: | The behavior of bridge monolithic connections is modeled using a simplified mathematical model that accounts for stress equilibrium,
compatibility of deformations, and the state of bond of longitudinal column bars anchored through the joint panel. In this
regard, a stress gradient factor is introduced, to model the profile of bar stresses along the anchorage. To establish this
factor, two independent mechanisms of stress transfer are considered: a bond mechanism between the anchored bars and the surrounding
concrete and a friction mechanism between the anchored bars and the transverse bars that enclose and restrain the anchorages.
The model is used for calculation of the shear stress–shear strain relationship of all tests found in the international literature
on bridge monolithic connections that showed shear type of failure under simulated seismic loading. Joint strength values
calculated with the proposed model are compared with the experimental results. Based on this comparison the proposed model
is verified for use in interpretation of bridge monolithic connection behavior and design. |
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Keywords: | Monolithic connections Bridge joints Seismic action Shear strain Shear strength Bond Anchorages |
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