Análisis de efectividad del coeficiente de irregularidad en elevación de la norma Ecuatoriana de la construcción (nec-2015)
Fecha
2022-04
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Universidad de Guayaquil - Facultad de Ciencias Matemáticas y Físicas - Carrera de Ingeniería Civil
Resumen
Para analizar la efectividad del coeficiente de irregularidad en elevación de la NEC-15 se realizó 481 modelos matemáticos en edificios de 4,8 y 12 niveles desarrollados en el software etabs a los cuales se les aplicó el método estático para analizar la vulnerabilidad a las que puedan estar sometidas las estructuras ante un evento sísmico. Para las edificaciones se procedió a determinar los valores de momentos flectores, cortantes, periodos fundamentales de vibración y desplazamientos de los pisos en el cual se aplicaron las 3 irregularidades en elevación propuestas por la NEC y sus posibles combinaciones: piso flexible (esbeltez y secciones), distribución de masas e irregularidad geométrica. De acuerdo con los valores obtenidos se determinó que la afectación de Øe en los edificios que presentan una o dos irregularidades da un porcentaje adicional de seguridad a las estructuras y el coeficiente pierde efectividad a medida que se incrementa la irregularidad.
To analyze the effectiveness of the coefficient of irregularity in elevation of the NEC-15, 481 mathematical models were made in buildings of 4, 8 and 12 levels developed in the etabs software to which the static method was applied to analyze the vulnerability to which structures may be subjected to a seismic event. For the buildings, the values of bending moments, shears, fundamental periods of vibration and displacement of the floors were determined, in which the 3 irregularities in elevation proposed by the NEC and their possible combinations were applied: flexible floor (slenderness and sections) , mass distribution and geometric irregularity. According to the values obtained, it was determined that the affectation of Øe in the buildings that present one or two irregularities gives an additional percentage of safety to the structures and the coefficient loses effectiveness as the irregularity increases.
To analyze the effectiveness of the coefficient of irregularity in elevation of the NEC-15, 481 mathematical models were made in buildings of 4, 8 and 12 levels developed in the etabs software to which the static method was applied to analyze the vulnerability to which structures may be subjected to a seismic event. For the buildings, the values of bending moments, shears, fundamental periods of vibration and displacement of the floors were determined, in which the 3 irregularities in elevation proposed by the NEC and their possible combinations were applied: flexible floor (slenderness and sections) , mass distribution and geometric irregularity. According to the values obtained, it was determined that the affectation of Øe in the buildings that present one or two irregularities gives an additional percentage of safety to the structures and the coefficient loses effectiveness as the irregularity increases.
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IRREGULARIDAD, ELEVACIÓN, ANÁLISIS, EFECTIVIDAD, NEC-15
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