Limit Analysis of Geometrically Hardening Composite Steel-Concrete Systems / Stany Graniczne Geometrycznie Wzmacniających Się Konstrukcji Zespolonych

The paper considers some results of creating load-carrying composite systems that have uprated strength, rigidity and safety, therefore are called geometrically (self-) hardening systems. optimization mathematic models structures as discrete mechanical withstanding dead load, monotonic or low cyclic static kinematic actions proposed. To find limit parameters these the extreme energetic principle is suggested what result in bilevel programming problem statement. load found on first level optimization. On second power constant with equilibrium preloading maximized and/or system cost minimized. examples using proposed methods presented steel-concrete taken into account.