Abstract
To demonstrate the influence of material plasticity on structural behavior, a statically indeterminate three-bar truss is studied in this chapter. By analyzing the plastic performance of the three-bar truss made of elastic, perfectly plastic material or linear hardening elastic-plastic material, the basic characteristics of structural plasticity are explored. The influence of large deformation on the load-carrying capacity of the truss structure and the effect of loading path on the stress and strain of the truss are described. Finally, the yield curve and limit curve on a load plane are introduced.
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