The pull-out problem in restoring marble fragments: A design criterion based on experimental results

Marinelli, A; Papanicolopulos, S-A; Kourkoulis, S; Vayas, I

dc.contributor.author	Marinelli, A	en
dc.contributor.author	Papanicolopulos, S-A	en
dc.contributor.author	Kourkoulis, S	en
dc.contributor.author	Vayas, I	en
dc.date.accessioned	2014-03-01T01:32:11Z
dc.date.available	2014-03-01T01:32:11Z
dc.date.issued	2009	en
dc.identifier.issn	0039-2103	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20066
dc.subject	Dionysos marble	en
dc.subject	Monuments	en
dc.subject	Pull-out	en
dc.subject	Restoration	en
dc.subject.classification	Materials Science, Characterization & Testing	en
dc.subject.other	Analytic solution	en
dc.subject.other	Bending effect	en
dc.subject.other	Carrying capacity	en
dc.subject.other	Cementitious materials	en
dc.subject.other	Design criterion	en
dc.subject.other	Dionysos marble	en
dc.subject.other	Drilled holes	en
dc.subject.other	Energy consumption	en
dc.subject.other	Experimental and numerical analysis	en
dc.subject.other	Experimental setup	en
dc.subject.other	Failure mechanism	en
dc.subject.other	Measuring systems	en
dc.subject.other	Monuments	en
dc.subject.other	Numerical models	en
dc.subject.other	Pull-out	en
dc.subject.other	Pull-out test	en
dc.subject.other	Reinforcing bar	en
dc.subject.other	Structural elements	en
dc.subject.other	Ultimate loads	en
dc.subject.other	Agriculture	en
dc.subject.other	Bars (metal)	en
dc.subject.other	Metal recovery	en
dc.subject.other	Quality assurance	en
dc.subject.other	Reinforced concrete	en
dc.subject.other	Reinforcement	en
dc.subject.other	Restoration	en
dc.subject.other	Safety factor	en
dc.subject.other	Structural members	en
dc.subject.other	Marble	en
dc.title	The pull-out problem in restoring marble fragments: A design criterion based on experimental results	en
heal.type	journalArticle	en
heal.identifier.primary	10.1111/j.1475-1305.2008.00519.x	en
heal.identifier.secondary	http://dx.doi.org/10.1111/j.1475-1305.2008.00519.x	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	For the development of innovative connections for the restoration of the integrity of structural elements of ancient stone temples, it is imperative, among others, to understand the reasons of the 'pull-out' phenomenon. Pull-out can be defined as the gradual or abrupt removal of the reinforcing bars from the body of the structural member, without prior failure of neither the marble nor the bars. An analytic solution is not yet available and in this context, a combined experimental and numerical analysis was undertaken in an effort to enlighten the failure mechanisms activated during the phenomenon. The experimental part included a series of pull-out tests with prismatic specimens made from Dionysos marble in which threaded metallic bars were planted in drilled holes. The adhesion between the marble and the bar was achieved using a suitable cementitious material. The criterion adopted for the design of the connections is to avoid completely the failure of marble. The parameters studied included the depth and the pitch of the thread of the reinforcing bars. The experimental set-up comprising suitable supporting and measuring systems was improvised, given the absence of a standard, relevant to this particular problem. Based on the experimental results, a design criterion is introduced allowing for a predefined amount of slip between the reinforcing bar-cement interface and the marble body. In addition, a numerical model is developed, calibrated on the basis of the experimental results. It is concluded that the form of the thread influences considerably the carrying capacity: denser pitches lead to higher ultimate load and energy consumption while the coarser ones favour parasitic bending effects and a flexible behaviour. In addition, the medium depth for each pitch leads to a stiffer and stronger behaviour. © 2009 Blackwell Publishing Ltd.	en
heal.publisher	WILEY-BLACKWELL PUBLISHING, INC	en
heal.journalName	Strain	en
dc.identifier.doi	10.1111/j.1475-1305.2008.00519.x	en
dc.identifier.isi	ISI:000269708100006	en
dc.identifier.volume	45	en
dc.identifier.issue	5	en
dc.identifier.spage	433	en
dc.identifier.epage	444	en