Nonlocal Damage Formulation for a Flexibility-Based Frame Element
Publication: Journal of Structural Engineering
Volume 135, Issue 10
Abstract
This paper presents the formulation for a novel flexibility-based one-dimensional (1D) finite element that captures material and structural softening within a reinforced concrete framed structure. Separating the total elastic and inelastic components of the strain at integration points, a secant solution strategy is introduced that is consistent with damage models in the framework of nested iterative algorithms. In this formulation and solution strategy, at every stage of loading the inelastic deformation of the element can be obtained directly without resorting to unloading processes, which is useful when the value of inelastic deformation is required according to some seismic design provisions. In addition, a nonlocal integral damage model, based on averaged strain, has been used to ensure mesh size independent objectivity of local and global responses. The efficiency and accuracy of the formulation is compared with numerical and experimental data with good correlation observed and mesh objectivity demonstrated.
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Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 10 • October 2009
Pages: 1213 - 1221
Copyright
© 2009 ASCE.
History
Received: Jan 17, 2008
Accepted: Mar 30, 2009
Published online: Apr 1, 2009
Published in print: Oct 2009
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