Experimental Studies of Deflections in Bending Reinforced Concrete Elements Taking into Account the Influence of the Shape of Their Cross-Section

Experimental studies of the deformability of reinforced concrete beams of trapezoidal and reference rectangular sections have been carried out. Reinforced concrete structures of trapezoidal section are the object of research. The main subject of research is the deflections of the structures under study at all stages of loading up to failure. The investigated beams have the same overall dimensions with different concrete consumption. A methodology has been developed for the experimental study of the deflected mode, taking into account the features of the cross section of the samples under study. A universal model of a test setup is proposed that allows testing bending elements with control of the studied parameters. The features of the growth of deflections at different stages of loading are revealed. It was found that in the later stages of the load close to breaking, deflection value for the beams of trapezoidal cross-section with a wide upper edge becomes lower than the beams of rectangular cross section. It is shown that trapezoidal beams with a lower wide edge have the lowest deformative and strength characteristics.