Earthquake-resistant design of reinforced concrete structures: Shortcomings of current methods

Kotsovos, MD; Baka, A; Vougioukas, E

dc.contributor.author	Kotsovos, MD	en
dc.contributor.author	Baka, A	en
dc.contributor.author	Vougioukas, E	en
dc.date.accessioned	2014-03-01T01:18:54Z
dc.date.available	2014-03-01T01:18:54Z
dc.date.issued	2003	en
dc.identifier.issn	0889-3241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15256
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0041738069&partnerID=40&md5=eeba838829dc7de2ca9c5390006a8ba7	en
dc.subject	Concrete	en
dc.subject	Design	en
dc.subject	Reinforced concrete	en
dc.subject	Seismic	en
dc.subject	Test	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Compressive stress	en
dc.subject.other	Crack initiation	en
dc.subject.other	Earthquake resistance	en
dc.subject.other	Failure analysis	en
dc.subject.other	Reinforced concrete	en
dc.subject.other	Steel	en
dc.subject.other	Structural design	en
dc.subject.other	Structural loads	en
dc.subject.other	Trusses	en
dc.subject.other	Compressive force path	en
dc.subject.other	Cyclic transverse loading	en
dc.subject.other	Damage	en
dc.subject.other	Earthquake-resistant design	en
dc.subject.other	Monotonic loading	en
dc.subject.other	Reinforced concrete structure	en
dc.subject.other	Concrete construction	en
dc.title	Earthquake-resistant design of reinforced concrete structures: Shortcomings of current methods	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	The work forms part of an attempt to investigate the causes of unexpected damage suffered by vertical structural elements of reinforced concrete (RC) structures during the July 9, 1999, Athens earthquake. It is based on an experimental investigation of the behavior of simply supported two-span linear elements designed from first principles by using methods based on two contrasting concepts: the truss analogy (as applied by the design methods incorporated in current codes of practice) and the compressive-force path concept. These elements were tested under both monotonic and cyclic transverse loading combined with a constant axial-compressive concentric force. The results of the tests indicated that not only does the truss analogy not safeguard against a brittle type of failure in the region of the point of inflection, but it may, in fact, cause such a failure in regions heavily reinforced with stirrups widely referred to as critical lengths. In contrast with the truss analogy, the compressive-force path method was found to yield design solutions that fulfil the code requirements for strength and ductility for the case of monotonic loading. For the case of cyclic loading, however, the longitudinal extension of criss-crossing inclined cracking within noncritical regions was found to destroy the bond between concrete and steel, thus leading to premature reduction of the strength and energy-absorption capacities of all the structural elements tested. It appears, therefore, that an efficient earthquake-resistant design method must also safeguard against failure associated with bond destruction.	en
heal.publisher	AMER CONCRETE INST	en
heal.journalName	ACI Structural Journal	en
dc.identifier.isi	ISI:000179958800002	en
dc.identifier.volume	100	en
dc.identifier.issue	1	en
dc.identifier.spage	11	en
dc.identifier.epage	18	en