<?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>S0185-092X2015000100065</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reglas de combinación de los efectos de las tres componentes de terremotos y respuesta crítica]]></article-title>
<article-title xml:lang="en"><![CDATA[Combination rules of the effects of three components of earthquakes and critical response]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valenzuela Beltrán]]></surname>
<given-names><![CDATA[Federico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes Salazar]]></surname>
<given-names><![CDATA[Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De León Escobedo]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bojórquez Mora]]></surname>
<given-names><![CDATA[Edén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Barraza]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<numero>92</numero>
<fpage>65</fpage>
<lpage>94</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-092X2015000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-092X2015000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-092X2015000100065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La precisión de las reglas de combinación del 30% y SRSS, y la orientación crítica de las componentes de terremotos se estudian en este trabajo. Se analizan modelos estructurales complejos que representan edificios de baja y mediana altura. Se realiza un análisis estadístico de la precisión de las reglas de combinación aplicadas a parámetros de respuesta individuales y múltiples. El efecto de la correlación entre las componentes de los terremotos en dicha precisión también se estudia. Finalmente, se realizan análisis con varios ángulos de incidencia de las componentes con la finalidad de encontrar la orientación crítica. Los resultados muestran que las reglas subestiman la carga axial en columnas, pero sobreestiman razonablemente los cortantes de entrepiso. Ambas reglas son más conservadoras cuando los modelos se excitan por las tres componentes. Los efectos individuales pueden estar altamente correlacionados, incluso para componentes principales no correlacionadas. Las reglas no siempre son precisas para valores pequeños de coeficientes de correlación, y valores altos de éstos no siempre están relacionados a una estimación imprecisa de la respuesta combinada. La precisión de las reglas de combinación depende del grado de correlación de las componentes, del parámetro de respuesta, de la localización del elemento considerado y del nivel de deformación estructural.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The accuracy of the 30% and SRSS rules, the critical orientation of the components of earthquakes, and some related issues, are studied in this work. Complex structural models representing low and medium height buildings are analyzed. A statistical analysis of the precision of the combination rules, applied to individual and multiple response parameters, is performed. The effect of the correlation of the components of earthquakes in such precision is also studied. Finally, several analyses with various incidence angles of the components are performed with the purpose of finding the critical orientation. Results show that the rules underestimate the axial load in columns, but reasonably overestimate the interstory shears. Both rules are more conservative when the models are excited by the three components. The individual effects may be highly correlated, even for principal components. The rules are not always accurate for small values of correlation coefficients, and high values of such coefficients are not always related to an inaccurate estimation of the combined response. The accuracy of the combination rules depends on the degree of correlation of the components, the response parameter, the location of the considered member and the level of structural deformation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[códigos de diseño sísmico]]></kwd>
<kwd lng="es"><![CDATA[edificios de acero]]></kwd>
<kwd lng="es"><![CDATA[reglas de combinación]]></kwd>
<kwd lng="es"><![CDATA[correlación de los efectos individuales]]></kwd>
<kwd lng="es"><![CDATA[respuesta crítica]]></kwd>
<kwd lng="en"><![CDATA[seismic design codes]]></kwd>
<kwd lng="en"><![CDATA[steel buildings]]></kwd>
<kwd lng="en"><![CDATA[combination rules]]></kwd>
<kwd lng="en"><![CDATA[correlation of individual effects]]></kwd>
<kwd lng="en"><![CDATA[critical response]]></kwd>
</kwd-group>
</article-meta>
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