<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-6835</journal-id>
<journal-title><![CDATA[Revista ALCONPAT]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. ALCONPAT]]></abbrev-journal-title>
<issn>2007-6835</issn>
<publisher>
<publisher-name><![CDATA[Asociación Latinoamericana de Control de Calidad, Patología y Recuperación de la Construcción A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-68352018000300224</article-id>
<article-id pub-id-type="doi">10.21041/ra.v8i3.325</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Service life design and modelling of concrete structures - background, developments, and implementation]]></article-title>
<article-title xml:lang="es"><![CDATA[Diseño y modelado de vida útil de estructuras de hormigón: antecedentes, desarrollos e implementación]]></article-title>
<article-title xml:lang="pt"><![CDATA[Construindo um projeto de vida útil de estruturas de concreto - histórico, desenvolvimentos e implementação]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alexander]]></surname>
<given-names><![CDATA[M. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Cape Town Department of Civil Engineering ]]></institution>
<addr-line><![CDATA[Cape Town ]]></addr-line>
<country>South Africa</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>8</volume>
<numero>3</numero>
<fpage>224</fpage>
<lpage>245</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-68352018000300224&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-68352018000300224&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-68352018000300224&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The paper presents an international overview of current knowledge and progress in service life design and modelling of concrete structures. It explores why service life modelling is needed, and indicates that modern demands for longevity, durability, and sustainability of concrete structures cannot be fulfilled without service life modelling. It addresses the current approaches to durability design and specification and concludes that a move to performance-based approaches is imperative for progress to be made. Examples from international experience are cited to illustrate progress that has been made. Lastly, the paper discusses ways of moving forward, recognizing that the philosophical bases are already in place in the form of general code formulations, but which need to be converted into useful approaches.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El documento presenta una visión general internacional del conocimiento actual y el progreso en el diseño de vida útil y el modelado de estructuras de hormigón. Explora por qué es necesario el modelado de la vida útil e indica que las demandas modernas de longevidad, durabilidad y sostenibilidad de las estructuras de hormigón no pueden cumplirse sin un modelo de vida útil. Aborda los enfoques actuales del diseño y la especificación de la durabilidad y concluye que es imperativo avanzar hacia enfoques basados en el desempeño para avanzar. Se citan ejemplos de la experiencia internacional para ilustrar el progreso que se ha logrado. Por último, el documento analiza formas de avanzar, reconociendo que las bases filosóficas ya están en su lugar en la forma de formulaciones de código general, pero que deben convertirse en enfoques útiles.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO O artigo apresenta uma visão internacional do conhecimento atual e do progresso na modelagem de um projeto de vida útil de estruturas de concreto. Explora porque a modelagem da vida útil é necessária e mostra que as demandas modernas de longevidade, durabilidade e sustentabilidade das estruturas de concreto não podem ser atendidas sem uma correta modelagem da vida útil. Discute as abordagens atuais de projeto e especificação da durabilidade e conclui que uma mudança para uma abordagem baseada em desempenho é imperativa para que um desenvolvimento significativo seja logrado. Exemplos da experiência internacional são citados para ilustrar o progresso que tem sido obtido. Por último, é discutido como avançar, reconhecendo que as bases filosóficas já estão em vigor na forma de formulações gerais nas normas prescritivas e de desempenho, mas que precisam ser transformadas em abordagens úteis ao exercício profissional.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[service life modelling]]></kwd>
<kwd lng="en"><![CDATA[performance-based specifications]]></kwd>
<kwd lng="en"><![CDATA[concrete durability]]></kwd>
<kwd lng="en"><![CDATA[durability indicators]]></kwd>
<kwd lng="en"><![CDATA[model code]]></kwd>
<kwd lng="es"><![CDATA[modelado de vida de servicio]]></kwd>
<kwd lng="es"><![CDATA[especificaciones basadas en el desempeño]]></kwd>
<kwd lng="es"><![CDATA[durabilidad del concreto]]></kwd>
<kwd lng="es"><![CDATA[indicadores de durabilidad]]></kwd>
<kwd lng="es"><![CDATA[código modelo]]></kwd>
<kwd lng="pt"><![CDATA[modelagem do projeto de vida útil]]></kwd>
<kwd lng="pt"><![CDATA[especificações baseadas em desempenho]]></kwd>
<kwd lng="pt"><![CDATA[durabilidade do concreto]]></kwd>
<kwd lng="pt"><![CDATA[indicadores de durabilidade]]></kwd>
<kwd lng="pt"><![CDATA[norma modelo]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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