Incremental Dynamic and Nonlinear Static Analyses for Seismic Assessment of Medieval Masonry Towers
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
Discrete rigid blocks interacting through nonlinear elastic damageable interfaces are used to model the global behavior of a medieval masonry tower under seismic actions. The seismic vulnerability assessment is carried out by nonlinear static analysis (NSA) and incremental dynamic analysis (IDA), whose results are compared. It is confirmed that NSA results with both triangular and uniform load distributions are safety preserving and could be adopted for design scopes. In addition, the nondimensional horizontal-displacement threshold of 0.6% proposed by some building codes for existing masonry structures is aligned with NSA results and underestimates the capacity of the structure obtained by IDA. A comparison in terms of fragility curves highlights that NSA accounting for material uncertainties and IDA with record-to-record variability provide comparable levels of dispersion.
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Acknowledgments
The authors kindly acknowledge the Region of Tuscany, which financially supported the research (theme PAR FAS 2007-2013 - CIPE No. 166/2007 - Line 1.1.a.3: Science and Technology for the preservation and enhancement of cultural heritage).
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jul 13, 2016
Accepted: Dec 2, 2016
Published online: Mar 3, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 3, 2017
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