<?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>S1405-55462021000400821</article-id>
<article-id pub-id-type="doi">10.13053/cys-25-4-3778</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ayudas de diseño para trabes de sección transversal rectangular con cartelas parabólicas: Parte 2]]></article-title>
<article-title xml:lang="en"><![CDATA[Design Aids for Beams of Rectangular Cross Section with Parabolic Haunches: Part 2]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luévanos Soto]]></surname>
<given-names><![CDATA[Rosa Margarita]]></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 contrib-type="author">
<name>
<surname><![CDATA[López Chavarría]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina Elizondo]]></surname>
<given-names><![CDATA[Manuel]]></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>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>4</numero>
<fpage>821</fpage>
<lpage>834</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-55462021000400821&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-55462021000400821&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-55462021000400821&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En este trabajo se presentan las ayudas de diseño más utilizadas para vigas de sección rectangular con cartelas parabólicas. La viga se encuentra sujeta a una carga concentrada localizada en cualquier parte de la viga, y toma en cuenta las deformaciones por flexión y cortante para obtener los factores de momentos de empotramiento, que es la principal aportación de este trabajo de investigación. La primera parte de este trabajo presenta las ayudas de diseño para el mismo tipo de vigas para obtener los factores de transporte o arrastre, los factores de rigidez, y los factores de momentos de empotramiento se obtienen para una carga uniformemente distribuida. Las variables y las simplificaciones son las mismas que en la parte 1. Además, se muestra un ejemplo numérico utilizando las ayudas de diseño, y se compara con las ecuaciones previamente descritas por los autores en un artículo anterior a este documento, y los resultados son iguales con una aproximación de tres dígitos. Por lo tanto, las ayudas de diseño proporcionan una gran herramienta de ayuda para los ingenieros estructurales por el gran ahorro de tiempo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In this paper, the most used design aids for beams of rectangular section with parabolic haunches are presented. The beam is found subjected to concentrated load localized anywhere on the beam, and takes into account the bending and shear deformations to obtain the fixed-end moments factors, which is the main contribution of this research work. The first part of this work presents the design aids for the same type of beams to obtain the carry-over factors, the stiffness factors, and the fixed-end moments factors are obtained for a uniformly distributed load. The variables and the simplifications are the same as in the part 1. Also, a numerical example is shown using the design aids, and it is compared with the equations previously presented by the authors in a paper prior to this document, and the results are equal to a three-digit approximation. Therefore, design aids provide a great tool of help for structural engineers by the greatly time-savings.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ayudas de diseño]]></kwd>
<kwd lng="es"><![CDATA[vigas rectangulares]]></kwd>
<kwd lng="es"><![CDATA[cartelas parabólicas]]></kwd>
<kwd lng="es"><![CDATA[carga concentrada]]></kwd>
<kwd lng="es"><![CDATA[factores para momentos de empotramiento]]></kwd>
<kwd lng="en"><![CDATA[Design aids]]></kwd>
<kwd lng="en"><![CDATA[rectangular berms]]></kwd>
<kwd lng="en"><![CDATA[parabolic haunches]]></kwd>
<kwd lng="en"><![CDATA[concentrated load]]></kwd>
<kwd lng="en"><![CDATA[fixed-end moments factors]]></kwd>
</kwd-group>
</article-meta>
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<given-names><![CDATA[L.R.F.D.]]></given-names>
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<source><![CDATA[Bridge design specifications]]></source>
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<publisher-name><![CDATA[American Association of State and Highway Transportation Officials]]></publisher-name>
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