<?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>0185-092X</journal-id>
<journal-title><![CDATA[Ingeniería sísmica]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. sísm]]></abbrev-journal-title>
<issn>0185-092X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Ingeniería Sísmica A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-092X2021000100084</article-id>
<article-id pub-id-type="doi">10.18867/ris.105.506</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Pruebas de vibración ambiental en un edificio durante su proceso de reforzamiento]]></article-title>
<article-title xml:lang="en"><![CDATA[Ambiental vibration tests of a building during its structural strengthening]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Barrios]]></surname>
<given-names><![CDATA[Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huergo Ríos]]></surname>
<given-names><![CDATA[Iván F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arce León]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ Morelia]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,UNAM FES Acatlán Unidad de Investigación Multidisciplinaria]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<numero>105</numero>
<fpage>84</fpage>
<lpage>101</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-092X2021000100084&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-092X2021000100084&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-092X2021000100084&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se muestran los resultados de tres pruebas de vibración ambiental realizadas en un edificio ubicado en la zona de transición de la Ciudad de México durante tres diferentes etapas de su reforzamiento estructural. La primera y segunda prueba se realizaron el 05 de noviembre del 2016 y el 24 de junio de 2017, respectivamente. La tercera prueba se realizó el 28 de septiembre de 2017, pocos días después de que se presentaron los sismos del 07 y del 19 de septiembre. Se realizaron tres modelos numéricos con las propiedades estructurales que tenía el edificio durante su proceso constructivo en el momento de la realización de cada una de las pruebas, con ello se determinaron los periodos de vibrar y las formas modales durante las tres etapas mencionadas. Los periodos de vibrar obtenidos durante las pruebas experimentales muestran similitud con los obtenidos en forma analítica; el amortiguamiento promedio del edificio resultó ser del 6%. Se concluye que los eventos sísmicos de septiembre de 2017 pudieron ocasionar una ligera degradación de la rigidez durante la etapa de reforzamiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper shows the results related to three ambiental vibration tests carried out in a building located in the transition zone of Mexico City during three different stages of its structural strengthening. The first and second tests were carried out on November 5, 2016 and June 24, 2017, respectively. On the other hand, the third ambiental vibration test was carried out on September 28, 2017, that is, a few days after the earthquakes of September 7 and September 19, 2017. Three numerical models of the building were developed in order to compute the periods and mode shapes related to each one of the ambiental vibration tests carried out during the structural strengthening. Signal processing revealed that the periods of vibration are similar to those computed analytically through the numerical models, on the other hand, the average structural damping ratio is approximately equal to 6 %. It is concluded that the seismic events of September, 2017 perhaps caused a slight degradation in the lateral stiffness of the building during its structural strengthening.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Vibración ambiental]]></kwd>
<kwd lng="es"><![CDATA[sismos del 07 y 19 de septiembre de 2017]]></kwd>
<kwd lng="es"><![CDATA[amortiguamiento estructural]]></kwd>
<kwd lng="en"><![CDATA[Ambiental vibration test]]></kwd>
<kwd lng="en"><![CDATA[Mexico City earthquakes of September, 2017]]></kwd>
<kwd lng="en"><![CDATA[structural damping]]></kwd>
</kwd-group>
</article-meta>
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