<?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>2215-2652</journal-id>
<journal-title><![CDATA[Ingeniería]]></journal-title>
<abbrev-journal-title><![CDATA[Ingeniería]]></abbrev-journal-title>
<issn>2215-2652</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-26522024000200009</article-id>
<article-id pub-id-type="doi">10.15517/ri.v34i2.55859</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento sísmico de edificios irregulares en planta considerando sistemas de aislación con excentricidad de rigidez]]></article-title>
<article-title xml:lang="en"><![CDATA[Seismic behavior of irregular buildings in plan considering isolation systems with stiffness eccentricity]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garrido]]></surname>
<given-names><![CDATA[César A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Dávila]]></surname>
<given-names><![CDATA[Víctor I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontifica Universidad Católica del Perú  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Pontifica Universidad Católica del Perú  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Perú</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>9</fpage>
<lpage>20</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-26522024000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-26522024000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-26522024000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de la presente investigación es evaluar el efecto de los parámetros dinámicos del sistema de aislación (el grado de acoplamiento torsional (&#937;b), el periodo de vibración (Tb), la razón de amortiguamiento crítico (&#958;b) y la excentricidad de rigidez de la base de aislación (erb)) en el comportamiento torsional de una familia de edificios con seis pisos y aislados en la base de concreto armado, considerando las excentricidades de rigidez o masa (er o em, respectivamente) en la superestructura. Estas modifican su comportamiento estructural ante sismos severos e incrementan los desplazamientos laterales y las derivas de manera significativa. Para ello, se realizó un análisis no lineal tiempo-historia a cada modelo estructural, por lo que estos se sometieron a un conjunto de siete registros de aceleraciones sísmicas, medidos en la costa de Perú y Chile, los cuales fueron escalados según el espectro de diseño de pseudoaceleraciones vigente en Perú. Como respuestas globales de interés, se consideran los desplazamientos laterales máximos y las derivas de entrepiso. Así pues, se observó que el efecto de em generó mayores amplificaciones en los desplazamientos laterales y derivas que er. Similarmente, el parámetro erb fue muy influyente en el comportamiento torsional de los edificios aislados con em y er, pues amplificó los desplazamientos laterales hasta en un 50 %. Además, el parámetro Tb impactó notablemente las derivas de entrepiso, ya que las redujo hasta en un 55 %. Por otro lado, los parámetros &#937;b y &#958;b fueron poco influyentes en dichas respuestas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This research aims to evaluate the effect of the dynamic parameters of the isolation system (the degree of torsional coupling (&#937;b), the period of vibration (Tb), the critical damping ratio (&#958;b), and the stiffness eccentricity of the isolation base (erb)) on the torsional behavior of a six-story reinforced concrete building family, considering the stiffness or mass eccentricities (er or em, respectively) in the superstructure. These modify structural behavior under severe earthquakes and increase lateral displacements and drifts. For this purpose, a nonlinear time-history analysis was performed on each model by subjecting them to a set of seven seismic accelerations records, measured on the coast of Peru and Chile, which were scaled following the pseudo-acceleration design spectrum from Peru. The main global responses were the maximum lateral displacements and the inter-story drifts. It was observed that the effect of em generated more amplification on lateral displacements and drifts than er. In a similar way, the parameter erb was very influential on the torsional behavior of the isolated buildings with em and er, amplifying lateral displacements up to 50 %. In addition, the parameter Tb impacted mostly on the inter-story drifts, reducing it up to 55 %. On the other hand, the parameters &#937;b and &#958;b did not significantly influence the responses of interest.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Elastomeric]]></kwd>
<kwd lng="en"><![CDATA[irregularity plan]]></kwd>
<kwd lng="en"><![CDATA[isolated building]]></kwd>
<kwd lng="en"><![CDATA[mass eccentricity]]></kwd>
<kwd lng="en"><![CDATA[parametric study]]></kwd>
<kwd lng="en"><![CDATA[stiffness eccentricity]]></kwd>
<kwd lng="es"><![CDATA[Aislador elastomérico]]></kwd>
<kwd lng="es"><![CDATA[análisis paramétrico]]></kwd>
<kwd lng="es"><![CDATA[edificio aislado de concreto]]></kwd>
<kwd lng="es"><![CDATA[excentricidad de masa]]></kwd>
<kwd lng="es"><![CDATA[excentricidad de rigidez]]></kwd>
<kwd lng="es"><![CDATA[irregularidad en planta]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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