Hierarchical structures for a robustness-oriented capacity design
Abstract
In this paper, we study the response of 2D framed structures made of rectangular cells, to the sudden removal of columns. We employ a simulation algorithm based on the Discrete Element Method, where the structural elements are represented by elasto-plastic Euler Bernoulli beams with elongation-rotation failure threshold. The effect of structural cell slenderness and of topological hierarchy on the dynamic residual strength after damage is investigated. Topologically \textit{hierarchical} frames have a primary structure made of few massive elements, while \textit{homogeneous} frames are made of many thin elements. We also show how depends on the activated collapse mechanisms, which are determined by the mechanical hierarchy between beams and columns, i.e. by their relative strength and stiffness. Finally, principles of robustness-oriented capacity design which seem to be in contrast to the conventional anti-seismic capacity design are addressed.
Cite
@article{arxiv.1509.01950,
title = {Hierarchical structures for a robustness-oriented capacity design},
author = {Enrico Masoero and Falk K. Wittel and Hans J. Herrmann and B. M. Chiaia},
journal= {arXiv preprint arXiv:1509.01950},
year = {2015}
}