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Estudio comparativo para áreas mínimas en contacto con el suelo de zapatas aisladas rectangulares y circulares trabajando parcialmente bajo compresión
Comparative study for minimum areas in contact with the ground of rectangular and circular isolated footings working partially under compression
DOI:
https://doi.org/10.15446/rbct.n55.111624Palabras clave:
áreas mínimas; zapatas aisladas rectangulares; zapatas aisladas circulares; distribución lineal de la presión del suelo; superficie de contacto trabaja parcialmente bajo compresión (es)minimum areas; rectangular isolated footings; circular isolated footings; linear ground pressure distribution; contact surface works partially under compression (en)
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Este trabajo presenta un estudio comparativo para áreas mínimas en contacto con el terreno de ZAR (zapatas aisladas rectangulares) y ZAC (zapatas aisladas circulares) que trabajan total MA (Modelo Actual) o parcialmente NM (Nuevo Modelo) a compresión. La metodología se describe utilizando las ecuaciones desarrolladas por el mismo autor para ZAR y ZAC. Principales hallazgos: las ZAR bajo flexión uniaxial tienen menos área que las ZAC en el MA y en el NM; El NM presenta menor área que el MA para ZAR y ZAC bajo flexión biaxial en todos los casos; El NM para ZAC muestra menos área que las ZAR, cuando los momentos son iguales y la relación de la carga axial dividida por el momento es 0.75 o mayor, cuando el momento más pequeño dividido por el momento más grande está entre 0.50 y 0.75, y la carga axial es mayor que el momento más grande. Por ello, se recomienda realizar un estudio previo para elegir el tipo de zapata.
This paper presents a comparative study for minimum areas in contact with the ground of RIF (rectangular isolated footings) y CIF (circular isolated footings) that work totally CM (Current model) or partially NM (New model) under compression. Methodology is described using the equations developed by the same author for RIF y CIF. Main findings: RIF under uniaxial bending have less area than CIF in the CM and in the NM; NM presents less area than CM for RIF y CIF under biaxial bending in all cases; NM for CIF shows less area than RIF, when the moments are equals and the relation of the axial load divided by the moment is 0.75 or greater, when the smallest moment divided by the largest moment is between 0.50 and 0.75, and the axial load is greater than the largest moment. Therefore, it is recommended to carry out a previous study to choose the type of footing.
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