<?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>1405-5546</journal-id>
<journal-title><![CDATA[Computación y Sistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Comp. y Sist.]]></abbrev-journal-title>
<issn>1405-5546</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Centro de Investigación en Computación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-55462024000300963</article-id>
<article-id pub-id-type="doi">10.13053/cys-28-3-4475</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Deflexiones en trabes de sección transversal rectangular con cartelas parabólicas sometidas a una carga concentrada]]></article-title>
<article-title xml:lang="en"><![CDATA[Deflections in Beams of Rectangular Cross Section with Parabolic Haunches Subjected to a Concentrated Load]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barraza-Saucedo]]></surname>
<given-names><![CDATA[Rogelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luévanos-Rojas]]></surname>
<given-names><![CDATA[Arnulfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Coahuila Instituto de Investigaciones Multidisciplinaria ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<volume>28</volume>
<numero>3</numero>
<fpage>963</fpage>
<lpage>987</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-55462024000300963&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-55462024000300963&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-55462024000300963&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Este documento presenta un modelo analítico para obtener las rotaciones y los desplazamientos perpendiculares al eje longitudinal en cualquier punto de una viga de sección rectangular con cartelas parabólicas sometida a un momento en cada apoyo y una carga concentrada tomando en cuenta las deformaciones por flexión y cortante, que es la principal contribución de esta investigación. El modelo actual no considera las deformaciones por cortante para obtener las rotaciones y los desplazamientos perpendiculares al eje longitudinal de la viga. La metodología se realiza bajo el concepto de que la derivada del desplazamiento vertical es la pendiente o rotación y la segunda derivada es el momento de la viga. También, se realiza una comparación entre el modelo propuesto y el modelo actual para vigas simplemente apoyadas, vigas empotradas en ambos extremos y vigas usando los mismos momentos y reacciones en los extremos (modelo propuesto) para ambos modelos con respecto al desplazamiento vertical máximo y su ubicación en la viga. Los resultados muestran que el modelo propuesto es mayor para vigas simplemente apoyadas y vigas usando los mismos momentos y reacciones en los extremos, y menor para vigas empotradas en ambos extremos para el desplazamiento vertical máximo con respecto al modelo actual. Por tanto, el modelo propuesto es más seguro y más adecuado con respecto al modelo actual para el análisis estructural, ya que las fuerzas cortantes y los momentos están presentes en todas las estructuras y se producen deformaciones por flexión y cortante.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This paper introduces an analytical model to determine the rotations and displacements perpendicular to the longitudinal axis at any point on a rectangular-section beam with parabolic stiffeners, exposed to moments at each support and a concentrated load, considering both bending and shear deformations, which is the primary contribution of this research. The current model does not account for shear deformations when calculating the rotations and displacements perpendicular to the beam&#8217;s longitudinal axis. The methodology relies on the vertical displacement&#8217;s first derivative as the slope or rotation and the second as the moment. Additionally, the proposed model is compared to the current model for simply supported beams, beams fixed at both ends, and beams with identical moments and reactions at the ends. The comparison focuses on the maximum vertical displacement and its location along the beam. The results show that the proposed model yields greater values for simply supported beams and beams using the same moments and reactions at the ends, and smaller values for beams fixed at both ends, in terms of the maximum vertical displacement compared to the current model. Therefore, the proposed model is safer and suitable than the current one for structural analysis, as shear forces and moments are present in all structures, and both bending and shear deformations occur.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Trabes rectangulares]]></kwd>
<kwd lng="es"><![CDATA[cartelas parabólicas]]></kwd>
<kwd lng="es"><![CDATA[deformaciones por flexión y cortante]]></kwd>
<kwd lng="es"><![CDATA[rotaciones]]></kwd>
<kwd lng="es"><![CDATA[desplazamientos verticales]]></kwd>
<kwd lng="en"><![CDATA[Rectangular beams]]></kwd>
<kwd lng="en"><![CDATA[parabolic haunches]]></kwd>
<kwd lng="en"><![CDATA[bending and shear deformations]]></kwd>
<kwd lng="en"><![CDATA[rotations]]></kwd>
<kwd lng="en"><![CDATA[vertical displacements]]></kwd>
</kwd-group>
</article-meta>
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