Comparison of the bearing capacity and deformability of the flange units of the beam-to-column junction at different flange thicknesses
Flange connection units are a common structural solution in construction, and in many cases have no analogues. In the Russian Federation, the regulatory framework does not allow rational design of flanged units. The series developed in the USSR are outdated. The previously used thickness of the flanges is not experimentally justified. The use of foreign regulatory documents in the Russian Federation has its own peculiarities when passing the examination and, as a rule, is not advisable. The development of computer computing power and numerical methods allows us to move away from field experiments in favor of mathematical modeling. The article calculates the flange connections of the beam-column type. Numerical models are made from volumetric finite elements. Calculations are performed on thickening grids until errors between iterations are less than 1%. The finite element model was verified on the basis of full-scale tests of flange units of the beam-column type. Various scenarios of node destruction are obtained. The type of failure corresponds to the type of failure described in European regulations. Using flanges of greater thickness leads to brittle failure of the node. The use of flanges of a smaller thickness allows you to achieve the distribution of force over the height of the beam and plastic failure.