Estudio del comportamiento sísmico de un edificio de uso múltiple, diseñado aproximadamente hace cuarenta años, con un sistema aporticado de Hormigón armado con sótano, ubicado en la ciudad de Guaya
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2020-04
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Universidad de Guayaquil - Facultad de Ciencias Matemáticas y Físicas Carrera de Ingeniería Civil
Resumen
El presente trabajo se enfocó en analizar una estructura de 10 niveles y un sótano que consta con un diseño de aproximadamente 40 años, la estructura está ubicada en la ciudad de Guayaquil; a edificación tiene un sistema aporticado de hormigón armado, el sótano tiene un encerramiento de muros de contención para estabilizar la estructura debido al empuje de tierra. Para él estudió del comportamiento sísmico se consideró los requerimientos actuales de la Norma Ecuatoriana de la Construcción NEC-2015 y el código ACI 318-14 y también se la evaluó mediante el FEMA-154. La estructura de acuerdo a los resultados obtenidos se puede considerar una estructura muy flexible en el sentido X en la cual se ha obtenido una distorsión relativa máxima de 0.03243 > 0.02, lo que indica que no está cumpliendo con los requerimientos de límites de derivas en este sentido y para el sentido y se muestra una distorsión de 0.013703 < 0.02 que si cumple con los límites de derivas, por lo tanto se planteó un reforzamiento que consiste en arriostramientos concéntricos para el sentido más desfavorable, siendo este el sentido X alcanzando los límites de derivas permitidos. Se analizó la estructura para un sismo de servicio con la finalidad de conocer el comportamiento de la estructura ante la presencia de un sismo de baja magnitud para el cual se obtuvo que la edificación esta apta para soportar el sismo de servicio, pero no el sismo de diseño.
The present work focused on analyzing a 10-level structure and a basement consisting of a design of approximately 40 years, the structure is located in the city of Guayaquil; the building has a system of reinforced concrete, the basement has an enclosure of retaining walls to stabilize the structure due to the earth thrust. For him, he studied the seismic behavior of the current requirements of the Ecuadorian Construction Standard NEC-2015, the ACI code 318-14 and also evaluated it through the FEMA-154. The structure according to the results obtained can be considered a very flexible structure in the X direction in which a maximum relative distortion of 0.03243> 0.02 has been obtained, which indicates that it is not complying with the requirements of drift limits in this sense and even the sense Y shows a distortion of 0.013703 <0.02 that if it meets the drift limits, therefore a reinforcement was proposed consisting of concentric bracing for the most unfavorable sense, this being the sense X reaching the limits of Drifts allowed. The structure for a service earthquake was analyzed in order to know the behavior of the structure in the presence of a low magnitude earthquake for which it was obtained that the building is capable of supporting the service earthquake but not the design earthquake.
The present work focused on analyzing a 10-level structure and a basement consisting of a design of approximately 40 years, the structure is located in the city of Guayaquil; the building has a system of reinforced concrete, the basement has an enclosure of retaining walls to stabilize the structure due to the earth thrust. For him, he studied the seismic behavior of the current requirements of the Ecuadorian Construction Standard NEC-2015, the ACI code 318-14 and also evaluated it through the FEMA-154. The structure according to the results obtained can be considered a very flexible structure in the X direction in which a maximum relative distortion of 0.03243> 0.02 has been obtained, which indicates that it is not complying with the requirements of drift limits in this sense and even the sense Y shows a distortion of 0.013703 <0.02 that if it meets the drift limits, therefore a reinforcement was proposed consisting of concentric bracing for the most unfavorable sense, this being the sense X reaching the limits of Drifts allowed. The structure for a service earthquake was analyzed in order to know the behavior of the structure in the presence of a low magnitude earthquake for which it was obtained that the building is capable of supporting the service earthquake but not the design earthquake.
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Palabras clave
Pushover, Derivas, Flexión, Rotulas Plásticas, Arriostramientos