A PROPOSAL FOR BEAM-COLUMN INTERACTION FORMULAE

摘要

a: In order to improve Eurocode 3 beam-column formulae, a research was led by a so-called "ECCS TC8 - ad-hoc working group", and, as a result, a new proposal dealing with plane and spatial behaviour has been suggested. It was derived according to the following requirements: theoretical background, strong physical meaning, consistency with the other formulae of the code, and accuracy. It should also cover all types of continuities: between the cross-section classes, from plasticity to elasticity as slenderness and axial force increase, and continuity between individual stability checks and cross-section verifications. In this paper, the theoretical basis arc first established and then the proposal is detailed for in-plane behaviour. Extension to spatial behaviour is next tackled, without accounting for lateral torsional buckling. Finally, in order to check the accuracy of the proposal, the results of comparisons based on a large number of numerical simulations are presented. It shows that the proposal gives satisfactory results.