Hierarchical Structures for a Robustness-Oriented Capacity Design
Publication: Journal of Engineering Mechanics
Volume 138, Issue 11
Abstract
In this paper, the response of two-dimensional framed structures made of rectangular cells to the sudden removal of columns is studied. A simulation algorithm based on the discrete-element method is employed, 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 hierarchical frames have a primary structure made of a few massive elements, while homogeneous frames are made of many thin elements. It is also shown 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 that seem to be in contrast to the conventional antiseismic capacity design are addressed.
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Information
Published In
Journal of Engineering Mechanics
Volume 138 • Issue 11 • November 2012
Pages: 1339 - 1347
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Oct 9, 2010
Accepted: Mar 24, 2012
Published online: Mar 28, 2012
Published in print: Nov 1, 2012
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