Non-Linear Static Analysis of Masonry Buildings under Seismic Actions
Maria Luisa Beconcini, Paolo Cioni, Pietro Croce, Paolo Formichi, Filippo Landi, Caterina Mochi
Assessing existing masonry buildings in seismic zones is a
critical issue, due to the high vulnerability of the built
environment. Commonly, beside local analysis, refined
assessment procedures are used based on non-linear static
methods, like the pushover method, supplemented, if necessary,
by dynamic linear analyses, devoted to check the order of
magnitude of the results. In non-linear static analysis masonry
buildings are mostly modelled using the so-called equivalent
frame model, but the resulting structural scheme is usually very
complicated and the analysis requires to be “driven” step by
step by very skilled users in order to obtain consistent results.
An innovative and “robust” method is proposed for non-linear
static analysis of masonry building. The method, which relies
on very simple structural models, nearly independent on the
user, recovers some basic assumptions of the classical POR
method, and can be applied to mono or multi-story masonry
buildings. Comparing the results obtained with the proposed
method with those derived using the classical pushover analysis
in several relevant case studies, allowed to validate it.
Moreover, the practical applications confirmed that the method
is suitable for refined assessment of the seismic performance of
the structure, with a limited computational effort, so making
possible also extensive sensitivity studies. Full Text
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