<?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>S2215-26522024000200021</article-id>
<article-id pub-id-type="doi">10.15517/ri.v34i2.56413</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Respuesta sísmica de edificios de ocho niveles de concreto armado con irregularidad en planta]]></article-title>
<article-title xml:lang="en"><![CDATA[Seismic response of 8-story reinforced concrete buildings with irregular floor plan]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villafuerte Lujano]]></surname>
<given-names><![CDATA[Ingrid Angela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Dávila Gonzales]]></surname>
<given-names><![CDATA[Víctor Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontificia Universidad Católica del Perú  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Pontificia 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>21</fpage>
<lpage>37</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-26522024000200021&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-26522024000200021&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-26522024000200021&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para el modelamiento de estructuras, la hipótesis de diafragma rígido (DR) es empleada frecuentemente en el diseño sismorresistente, sin considerar si dicha hipótesis refleja una respuesta real de la edificación ante cargas de sismo. Desde una concepción arquitectónica, las edificaciones con tipologías de plantas irregulares satisfacen necesidades espaciales, funcionales y bioclimáticas; sin embargo, dichas estructuras se contraponen con su desempeño sísmico por tener respuestas diferentes. Además, se debe asumir una hipótesis para la losa de entrepiso que puede ser diafragma rígido (DR) o diafragma flexible (DF). Por lo tanto, es necesario conocer las respuestas lineales de estructuras con plantas irregulares. El objetivo del presente estudio es evaluar las configuraciones irregulares en plantas tipo L, H, T y U sobre el comportamiento sísmico de estructuras de ocho niveles, considerando las hipótesis de DR y DF. A partir de las respuestas globales y locales, se determinó que los casos de estudio con DF presentaron periodos de vibración más largos, que generaron mayores deflexiones de las estructuras, provocados por la deformación de la losa en su plano. Sin embargo, los valores de las fuerzas cortantes con DF fueron menores en comparación con los modelos con DR, debido a que la losa de entrepiso se deformó en su plano, lo que repercutió en la disminución del coeficiente de amplificación sísmica (C). Así, también, las tipologías L, T y U presentaron mayores demandas sísmicas, desplazamientos laterales y aceleraciones en los bordes en comparación al modelo H, que presentó desplazamientos laterales menores y uniformes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract For the modeling of structures, the hypothesis of a rigid diaphragm (DR) is frequently employed in earthquake-resistant design, without considering whether this hypothesis accurately reflects the building&#8217;s actual response to seismic loads. From an architectural standpoint, buildings with irregular floor plan typologies fulfill spatial, functional, and bioclimatic needs. However, these structures contradict their seismic performance due to their differing responses. Additionally, a hypothesis must be assumed for the floor slab, which can be a rigid diaphragm (DR) or a flexible diaphragm (DF). Therefore, it is essential to understand the linear responses of structures with irregular floor plans. The objective of this study is to evaluate irregular configurations in L, H, T, and U-type floor plans regarding the seismic behavior of 8-story structures, considering both DR and DF hypotheses. Based on global and local responses, it was determined that the DF study cases exhibited longer vibration periods, resulting in greater deflections of the structures caused by the deformation of the slab in its plane. However, shear force values with DF were lower compared to DR models, due to the slab deforming in its plane, resulting in a reduction of the seismic amplification coefficient (C). Additionally, L, T, and U typologies showed higher seismic demands, lateral displacements, and accelerations at the edges compared to the H model, which exhibited smaller and uniform lateral displacements.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Center of mass and rigidity]]></kwd>
<kwd lng="en"><![CDATA[displacements]]></kwd>
<kwd lng="en"><![CDATA[irregularity in plant]]></kwd>
<kwd lng="en"><![CDATA[rigid and flexible diaphragm]]></kwd>
<kwd lng="en"><![CDATA[vibration periods]]></kwd>
<kwd lng="es"><![CDATA[Centro de masa y rigidez]]></kwd>
<kwd lng="es"><![CDATA[desplazamientos]]></kwd>
<kwd lng="es"><![CDATA[diafragma rígido y flexible]]></kwd>
<kwd lng="es"><![CDATA[irregularidad en planta]]></kwd>
<kwd lng="es"><![CDATA[periodos de vibración]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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