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Elasto-Plastic Analysis of Trusses by Virtual Loads

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In this research a new approach is proposed for elasto-plastic analysis of structures with truss elements. This method covers both perfectly plastic and hardening properties. The Proposed technique uses substituting virtual loads instead of modifying the stiffness matrix. To solve this kind of problems, complementary programming is utilized. Numerical examples demonstrate that elasto-plastic analysis by this approach has very good convergence, rapidity, and accuracy.

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