Prestressed Concrete Beam Test Lab Report Example | Topics and Well Written Essays - 1250 words

Prestressed Concrete Beam Test - Lab Report Example All the beams were pretension concrete beams and they were cast through a precast beam that was manufactured on 6 September 2014. The tension stress was big enough but it seems to have reduced from the initial one and this could be due to elastic loss or friction. The flexural tensile strength was less than the tensile stress. Basing on the results the experimental loads were a bit lower than the theoretical loads, this could be due to experimental errors during the experiment that includes wrong measurement, inaccurate equipment etc. The stress is zero on the neutral axis and this is seen when t pass through the centroid. After adding compressive stress to the bending stress, the stress is decreased everywhere and the neutral axis tends to move away from the centroid, the movement will be towards the tensile edge. There is a possibility for the neutral axis to extend beyond the edge. The results will as well indicate the fatigue resistance in the given prestressed concrete beams as well as any advanced warnings related to the failure. Basically, it is recognized that warnings are indicated and provided by the increasing crack widening and deflection before the failure happens.Snapping of stressed tendons. One should never stand at the end of the beam. Protective screens and warnings signs need to be in position. The experiment objective was met despite a big difference in values between the practical and theoretical values. The properties of the concrete were obtained from the standard sample tests.