INELASTIC CYCLIC NUMERICAL ANALYSIS OF STEEL STRUTS USING DISTRIBUTED PLASTICITY APPROACH

Abstract eng:
This paper presents a comparison between two different modeling approaches: Refined FE modeling using volumetric elements, and fiber modeling using beam elements with distributed plasticity. The numerical models calibrated with the experimental result from existing literature, reproduce the behavior of cold formed SHS40, and hot rolled DUPE100 steel elements under inelastic cyclic loading. The hysteresis loops obtained from two models show that the accuracy obtained by simpler fiber-element formulation is quite close to the more refined volumetric model. In terms of computation time, distributed plasticity model is much more efficient, and can be a good option to perform nonlinear analysis of multi-level buildings, which would be quite cumbersome with volumetric modeling approach. This study has been realized thanks to the research fund received from European commission with the contract MEAKADO RFSR-CT-2013-00022.

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