In the thesis we present the calculation of deflections of reinforced concrete beams. We describe the
factors that cause the deflections. These deflections can damage or disable the function of the
construction in different ways. Rheology of concrete includes the influence of formation of
deformations, due to shrinkage and creep. We take this into account with reduction of material
parameters. We also emphasize the influence of cracking of reinforced concrete sections. The cracking
influences the reduction of bending stiffness of the construction and consequently increased
deformation. We present the most common criteria and problems which occur due to too much
deflection of reinforced concrete constructions. With the help of self-made Excel program which
computes the deflections of continious beams, we describe the procedure of calculating the deflections,
simplification of the computation and accuracy of the computed deflection values. Standard SIST EN
1992-1-1 gives the ratios between static height and span where deflection computation is not even
required. With the help of the preapared program we show some computation examples, where we
describe the dependencies and influence of the parameters on the deflections in reinforced concrete
continious beams.
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