Mechanical properties of lap-welded reinforcing steel bars used for repairing damaged reinforced concrete structures

Nikolaou, J; Papadimitriou, GD

dc.contributor.author	Nikolaou, J	en
dc.contributor.author	Papadimitriou, GD	en
dc.date.accessioned	2014-03-01T01:21:00Z
dc.date.available	2014-03-01T01:21:00Z
dc.date.issued	2004	en
dc.identifier.issn	1359-5997	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16042
dc.subject	Heat Affected Zone	en
dc.subject	Mechanical Property	en
dc.subject	Microstructures	en
dc.subject	Reinforced Concrete	en
dc.subject	Welded Joint	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Bars (metal)	en
dc.subject.other	Brittleness	en
dc.subject.other	Ductility	en
dc.subject.other	Heat affected zone	en
dc.subject.other	Hot rolling	en
dc.subject.other	Retrofitting	en
dc.subject.other	Welding	en
dc.subject.other	Yield stress	en
dc.subject.other	Hot cracking	en
dc.subject.other	Partial retrofitting	en
dc.subject.other	Reinforcing steel bars	en
dc.subject.other	Steel bars	en
dc.subject.other	Reinforced concrete	en
dc.title	Mechanical properties of lap-welded reinforcing steel bars used for repairing damaged reinforced concrete structures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1617/14075	en
heal.identifier.secondary	http://dx.doi.org/10.1617/14075	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The objective of the present investigation is the assessment of effectiveness of welding, performed during repair works and its effect on mechanical properties of the reinforcing steel bars. It is also intended to provide practical design guidance. Reinforcing steel bars falling into grades RB400 (weldable under specific conditions) and RB500W (intrinsically weldable) were examined. It was found that when welding is performed without preheating the microstructure of the Heat Affected Zone (HAZ) of RB400 steel always consists of hard and brittle phases, which affect directly the ductility of the bar. This observation led us to investigate the effect of preheating, which provides a significant improvement of the ductility of the weld-joints. Convenient practice allows meeting the behavior of the original bars. In the case of the RB500W steel, although preheating is not necessary for welding, it improves however the ductility of the bars.	en
heal.publisher	R I L E M PUBLICATIONS	en
heal.journalName	Materials and Structures/Materiaux et Constructions	en
dc.identifier.doi	10.1617/14075	en
dc.identifier.isi	ISI:000225923300005	en
dc.identifier.volume	37	en
dc.identifier.issue	274	en
dc.identifier.spage	698	en
dc.identifier.epage	706	en