2021 Volume 77 Issue 1 Pages 15-24
This study presents a kinematic model for shear-critical RC columns subjected to freeze-thaw action based on upper bound theorem. The developed model enables derivation of the shear resistance of damaged concrete when the displacement field is divided into undamaged and damaged zones based on freeze-thaw depth obtained from on-site inspections. The accuracy of the model is verified by comparing its predictions with an earlier published database on RC columns failing in shear after freeze-thaw exposure. The predicted shear strengths show good agreement with the test results within error of 20%. Thereafter, the current shear strength of an existing RC bridge pier with severe frost damage is analyzed by the model. Results demonstrate that the freeze-thaw depth may allow rational structural assessment.
