Shaking Table Evaluation of Reinforced Concrete Bridge Columns Repaired Using Fiber-Reinforced Polymer Jackets

Kumar, Pardeep

doi:10.1061/(asce)be.1943-5592.0000780

Cited by 9 publications

(1 citation statement)

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The material model proposed by Megalooikonomou et al (2012) was added to the source code of OpenSees as a uniaxial material. In order to evaluate the performance of this material model, it was implemented in the simulation of a series of shaking table tests performed by Kumar and Mosalam (2015). The two test specimens, having identical geometry and reinforcement details but different spacing of the transverse bars (one column had closely spaced stirrups satisfying code requirements, and the other had larger spacing, representing a shearcritical column), were subjected to a series of horizontal and vertical excitations on a shaking table and experienced moderate to high damage.

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confidence: 99%

Inelastic Time-History Analyses of FRP-Retrofitted Bridge Columns Subjected to Near-Field Ground Motions

Megalooikonomou

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The material model proposed by Megalooikonomou et al. (2012) was added to the source code of OpenSees as a uniaxial material. In order to evaluate the performance of this material model, it was implemented in the simulation of a series of shaking table tests performed by Kumar and Mosalam (2015). The two test specimens, having identical geometry and reinforcement details but different spacing of the transverse bars (one column had closely spaced stirrups satisfying code requirements, and the other had larger spacing, representing a shearcritical column), were subjected to a series of horizontal and vertical excitations on a shaking table and experienced moderate to high damage. The damaged columns were subsequently repaired with unidirectional CFRP and GFRP composite laminates and subjected to the same set of near-field earthquake excitations as the one tested in as-built configuration. Both specimens were simulated using nonlinear beam with hinge elements, in which the FRP-confined concrete was modelled using the aforementioned material model. Comparison between the numerical and experimental time history response of the column is indicative of the effectiveness of the implemented modelling. The numerical model confirmed that the repaired columns were able to resist higher shear and developed fewer peaks of tensile forces due to the vertical component of the ground motion. Therefore, the effect of changes of axial load from compression to tension due to the vertical component which can result in significant decreases in column shear strength, was diminished through the contribution of the FRP jacket. Finally, after performing all time history dynamic analyses, the residual displacements were found to be much lower for both repaired specimens in comparison to their bare counterparts. This is indicative of the effectiveness of the investigated FRP repair technique to produce resilient bridge columns when subjected to earthquake loading with strong vertical component.

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confidence: 99%