Statics of Historic Masonry Constructions

661 Pages·2017·24.883 MB·English

by  Mario Como (auth.)

Springer Series in Solid and Structural Mechanics 9
Mario Como
Statics of
Historic Masonry
Constructions
Third Edition
Springer Series in Solid and Structural
Mechanics
Volume 9
Series editors
Michel Frémond, Rome, Italy
Franco Maceri, Rome, Italy
More information about this series at http://www.springer.com/series/10616
Mario Como
Statics of Historic Masonry
Constructions
Third Edition
123
Mario Como
Department ofCivil Engineering
University of RomeTor Vergata
Rome
Italy
ISSN 2195-3511 ISSN 2195-352X (electronic)
SpringerSeries inSolid andStructural Mechanics
ISBN978-3-319-54737-4 ISBN978-3-319-54738-1 (eBook)
DOI 10.1007/978-3-319-54738-1
LibraryofCongressControlNumber:2017936354
1stedition:©Springer-VerlagBerlinHeidelberg2013
2ndedition:©SpringerInternationalPublishingSwitzerland2016
3rdedition:©SpringerInternationalPublishingAG2017
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To Ida
Preface to the Third Edition
Thisneweditionofthisbookhasbeendrivenbythenumerousrecentdevelopments
oftheresearchinthefield,whichitwasnecessarytorecallinthetext;theworkof
this new version allowed the revision of the writing with the correction of many
misprints occurred during the proofreading of the previous edition.
The new edition also has offered the opportunity to include, scattered in the
various chapters, many refinements and improvements of the discussed topics,
some of them here listed as follows: the collapse induced by the crushing of
masonryinelementsthatcannotgetdeformedthroughmechanisms,asforinstance
in the platband arch; the mechanics of collapse of masonry structures with
elasto-perfectlyplasticreinforcements;domestatics,particularlyexaminedindepth
regarding the dome of Brunelleschi in Florence.
Furthermore, the last chapter—the 11th—regarding the behavior of masonry
buildings under seismicactions,hasbeen completely modifiedandintegrated.The
startingpointofthischapterhasbeentheconsiderationthatmasonryconstructions
behave very differently from ductile structures.
Thereisnodissipationofenergyduringtheirdeformation,evenifaccompanied
by cracks. If properly reinforced, to avoid early local failures, masonry construc-
tionshavethesoleresourcetoescapetheseismicactionexhibitingrockingwithout
failure, under alternate seismic action.
In this context, on the wake of the more recent research on the matter, the
rocking of pier walls, which are the main resistant components of the masonry
structure, has been thoroughly examined. It has been defined the dynamical over-
turning failure acceleration, larger than the acceleration producing the statical
collapse,thatistheincipient rocking. Anew and proper definition oftheso-called
reduced strength factor q, well known in earthquake engineering, has been thus
giveninthischapter.Thisratio,heredefinedastheaccelerationratio,ratherlowin
value, is more appropriate to characterize masonry structures behavior, than those
inherent to other formulations, which improperly go back to criteria concerning
ductility of reinforced concrete or steel constructions.
vii
viii PrefacetotheThirdEdition
Due to the actual low values of this reduced strength factor q, the seismic
protectionofhistoricmasonryconstructionsrequiresdesigncriteriawherestrength,
andnotductility,hastobedominant.Afocalpointisthustheanalysisofthechain
of transmission of the seismic forces along the resistant structure of masonry
buildings, together with the out of plane and in-plane strength evaluation of
masonry walls, developed here with new elaborations and inclusions.
Asforthepreviouseditionsofthisbook,alltheabovedevelopmentshavebeen
obtained with the cooperation of the precious teamwork with Simona Coccia and
Fabio Di Carlo of the Department of Civil Engineering and Computer Science
of the University of Tor Vergata in Rome. To them, I address my grateful thanks.
Reflectionsandideasonthetopicalsotriggeredfromthefruitfuldiscussionsthat
I had with the students that I have met during some doctorate courses held by
myself at various Departments of Civil Engineering, as those of the University of
Brescia, of the University of Parma and Naples. Also to all these students, my
thanks are directed.
Rome, Italy Mario Como
December 2016
Preface to the Second Edition
Theinterestaccomplishedinthefirsteditiontogetherwiththeneedtoimprovethe
text with new developments, widening, and revisions, due to the recent research
achievements on the subject matter, isthe motivationof this second edition of this
book.
Anewsectionhasbeenaddedtothefirstchapter,analyzingnewtestresultsfor
masonrystrengthunderinclinedcompressionwithrespecttothejointdirection;this
is a subject of great importance for the evaluation of the seismic strength for
masonrywalls.Withinthesecondchapter,dedicatedtotheFundamentalsofStatics
ofMasonryStructures,anewLimitAnalysisofelasticno-tensionone-dimensional
systems has been included; this is a very useful tool, for instance, in the strength
analysisofmasonrywalls reinforced with steelties.Thethird,thefourth,the fifth,
and the eighth chapters are substantially unchanged, except for some additions
concerningtheconstructionoftheBrunelleschidomeinFlorenceandtheinclusion
of a new section dealing with the thrust evaluation of round cross vaults, then
appliedtothevaultsoftheDiocletianBathsinRome.Inthesixthchapter,thestudy
of the effect of the inclined cracking on the buttresses and leaning towers static
behaviors has been included. This study has been very useful for the analysis
concerning the strength assessment of Gothic cathedrals under side wind, a topic
which has been revised and developed within the seventh chapter. The ninth
chapter, dealing with the seismic analysis of masonry buildings—a topic in which
the current research has produced new remarkable results—has received the most
important revisions and widening.
All these developments have been obtained thanks to the precious teamwork
with Simona Coccia and Fabio Di Carlo of the Department of Civil Engineering
and Computer Science at the University of Tor Vergata in Rome. To them, I
address my grateful thanks.
ix
x PrefacetotheSecondEdition
Reflectionsandideasonthetopicalsotriggeredfromthefruitfuldiscussionsthat
I had with the students of the doctorate course in “Restoration of Historic and
Contemporary Buildings,” held at the D.I.C.A.T.A. of the University of Brescia.
Also to all these students, my thanks are directed.
Rome Mario Como
July 2015