COUPLED SECOND-ORDER ANALYSIS OF FRAMEWORKS

摘要

This paper presents a coupled second-order analysis of frameworks by an improved continuous medium technique. Buckling mode superposition and simplified second-order amplification formulas are taken into account. The method developed is applicable to a complete class of frameworks including the ideal shear frame panel, in which the beams are assumed to be rigid, and the associated columns system, for which the rigidity of beams are negligible. The main results can be extended to other types of lateral stiffening elements as built-up columns.