Shear strengthening of concrete T-beams with lateral layers of UHPC

Concrete T-beams are commonly used in building slab systems and bridge decks. They may require strengthening shear when they deteriorated or loading requirements increased. This research project studied the behaviour of concrete using cast-in-place Ultra High-Performance (UHPC) layers as a lateral method avoiding beam depth modification. Three UHPC strengthened beams together with one reference reinforced were tested monotonic three-point bending. Parameters investigated include thickness presence steel anchors at UHPC-concrete interface. A digital image correlation (DIC) technique was to investigate strain distribution during testing. Strain distribution, failure modes effects provided by analyzed. Results show that can substantially improve stiffness capacity T-beams, 25 50 mm increased 102% 113% T-beam capacity, respectively. Typical bending-shear observed on each layers. final without anchors, while combination bending noted anchors. The interface further increase ultimate stiffness, but limited extent. Therefore, experimental results confirmed an effective way strengthen existing inadequate