Service limit state of cast-in-place flexural member

Cast-in-place structure design distinguish them from reinforced concrete structures. Cast-in-place structures are involved in deformation and receive external load, so they possess different strength, deformation and other physical properties. In this regard, calculation methods of cast-in-place structures given in regulatory documents require clarification.Having studied the cast-in-place structure design and considering their stress-strain state, a method is proposed for the analysis of such structures according to their service limit state. This method allows taking into account different times of involvement in the external load and deformation of the cast-in-place structure as well as the difference in concrete strength and deformation properties. It is shown that the experimental data are in satisfactory agreement with theoretical calculations.