文档介绍：UNIVERSITY OF NAPLES FEDERICO II
Department of Structural Engineering
. PROGRAMME IN SEISMIC RISK
COORDINATOR PROF. ALDO ZOLLO
XXIII CYCLE
FULVIO PARISI
. THESIS
Non-Linear Seismic Analysis of Masonry Buildings
TUTOR PROF. NICOLA AUGENTI
2010
ABSTRACT
Non-linear analysis is the most viable tool to get accurate predictions of the actual
response of masonry structures under earthquake loading. Analytical methods based on
the idealisation of masonry walls with openings as systems of macro-elements allow
not only to capture the main failure modes observed after past earthquakes, but also to
ensure a putational demand in engineering practice.
The present thesis deals with non-linear incremental static (pushover) analysis on
masonry buildings modelled through evolutionary spread plasticity macro-elements.
In the first part of the work, fundamentals of structural analysis, seismic risk, and
performance-based seismic design are reviewed along with non-linear static procedures
and macro-element methods for seismic analysis of masonry buildings.
The second part of the work deals with theoretical advances in non-linear seismic
analysis of masonry buildings. In particular, an evolutionary spread plasticity macro-
element has been developed and static pushover procedures for individual masonry
walls, as well as entire buildings, are presented and discussed in detail.
The proposed macro-element has been defined as „evolutionary‟ because its inner
reacting domain changes as the lateral drift demand increases. Such an evolution is
caused by the spreading of cracking and yielding within the masonry. Namely, tensile
cracking of masonry induces significant reductions in the effective width of cross-
sections, which then depends on the magnitude of the given lateral drift (geometrical
non-linearity). Yielding of masonry develops near the extreme parts of the macro-
elemen