An efficient beam-column element for inelastic 3D frame analysis
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Beam-column elements with section resultant plasticity for the hysteretic behavior of the end plastic hinges are widely used for numerical simulations in earthquake engineering practice because of the good compromise between accuracy and computational cost. This chapter presents a three-dimensional inelastic beamcolumn element of this type with significant capabilities for the description of the global and local response of frames under monotonic and cyclic loads. In the proposed element the concept of generalized plasticity is extended to section resultants and element deformations and is used to describe the hysteretic behavior of the plastic hinges forming at the element ends. The element accounts for the interaction of the axial force with the bending moments about the principal section axes with suitably defined yield and limit surfaces that permit the description of the gradual yielding and the post-yield hardening behavior of the end sections. Comparisons of the hysteretic respo...nse of structural elements and small structural models between the proposed element and the more accurate, but computationally more expensive fiber section description of the cross section demonstrate the capabilities of the proposed model.
Keywords:Beam-column element / Generalized plasticity / Nonlinear analysis / Resultant plasticity
Source:Computational Methods in Applied Sciences, 2013, 30, 49-67
- Springer Netherland