Shear resistance of prestressed concrete beams with the constant and variable height

One of the methods increasing efficiency using prestressed reinforcement involves transferring a certain amount longitudinal tensioned from tensile zone in span to upper compressed on support, where it is not fully used ensure bending resistance. More effective may be solution which, due broken outline along length element, pre-stressed tendons are arranged at an angle axis, creating vertical compression support and beam shear In this study presented information about stress-strain state concrete straight curved beams based experimental investigations.