Shear failure of prestressed girders in regions without flexural cracks

In the design process of prestressed bridges and viaducts, the required amount of shear reinforcement is determined with a model that assumes the presence of flexural cracks. In order to keep the design process simple, this model is also prescribed to determine the amount of shear reinforcement for the regions of the structure in which, at the...

Shear Experiments of Prestressed Concrete Bridge Girders

For the assessment of existing slab-between-girder bridges, the shear capacity and failure mode are under discussion. Previous research showed that the static and fatigue punching capacity of the slabs is sufficient as a result of compressive membrane action. The girders then become the critical elements. This research studies the shear capacity...

Analytical, Numerical and Experimental Analysis of the Helperzoom Post-Tensioned T-Girders: Analyzing the shear capacity and failure mode of thin-webbed post-tensioned bulb-T-shaped girders with non-code-compliant stirrups

The Helperzoom bridge is one of few existing prestressed slab-between-girder bridges that is being managed by Rijkswaterstaat. These bridges are built before 1980 and do not comply with the current standards. To evaluate the structural safety and capacity these bridges are being assessed. A total of four girders were taken from the Helperzoom...

Effect of Flexural Cracks on Web-Shear Cracking of Prestressed Concrete Continuous Members

Shear tension failure in thin-webbed prestressed concrete elements is yet to be predicted in an accurate manner. The analytical method uses assumptions to simplify the theory. This makes it less accurate. The calculated resistance to web-shear cracking is based on the principle tensile stress reaching the tensile strength of concrete. Failing in...

Shear tension resistance of prestressed concrete beams with shear reinforcement: Based on the MCFT

Old bridges in the Netherlands are reassessed to prove their structural safety because of the increased traffic loads. The Eurocode model for the shear capacity of prestressed concrete beams with sufficient shear reinforcement was found to be very conservative for small amounts of transverse reinforcement, which is typical for old bridges. Code...

Numerical Investigation into Size Effect on Prestressed Concrete Beam Resistance to Shear Tension Cracking

In the past, many researches on the topic of size effect on concrete structures were mainly focused on the phenomenon of size effect in flexural cracking. The result of those studies can be found today in the concrete structure design specifications of well-known building codes, such as the Eurocode. Nevertheless, the inclusions of the results...

Shear Strengthening of Prestressed Concrete Beams with Ultra-High Performance Fibre Reinforced Concrete: Numerical Analysis by ATENA Model

The growing need for strengthening of concrete structures to improve their structural performance challenges structural engineers to come up with strengthening techniques that is most suitable and effective for a structural system in its deteriorated state. Although there are quite a few techniques in practice for strengthening of concrete...