Publicado

2017-01-01

Simulation model to estimate bending overstrength in concrete elements

Modelo de simulación para estimar la sobrerresistencia a flexión de elementos de concreto

DOI:

https://doi.org/10.15446/dyna.v84n200.52903

Palabras clave:

simulation model, bending overstrength, concrete compressive strength, random variable (en)
modelo de simulación, resistencia a flexión, resistencia a compresión del concreto, variable aleatoria (es)

Autores/as

A simulation model to estimate bending overstrength in reinforced concrete elements is presented. The simulation model employs basic design hypotheses according to NTC–04 [1] and ACI 318–11 [2] for rectangular concrete beams subjected to bending with rebars in the tension zone only. Concrete compression strength is included in the model as a random variable to estimate the uncertainty in bending strength on rectangular beams. Concrete compressive strength is evaluated for more than 16,000 compression tests for mixtures designed for 200 kgf/cm2 (19.6 MPa) and 250 kgf/cm2 (24.5 MPa). The main objective of this work is to assess the influence of real concrete compressive strength on the bending overstrength computed from analytical models used by actual construction codes like NTC–04 and ACI 318–11.
En este artículo se presenta un modelo de simulación para estimar la resistencia a flexión de elementos de concreto. El modelo de simulación emplea las hipótesis básicas de diseño de acuerdo con las NTC–04 [1], así como con el ACI 318–11 [2] para vigas de sección rectangular con acero de refuerzo solamente en la zona de tensión. La resistencia a la compresión del concreto se integra al modelo como una variable aleatoria con el fin de estimar la incertidumbre en la resistencia a flexión de las vigas. La resistencia a la compresión del concreto se estima a partir de más de 16 mil pruebas con mezclas diseñadas para obtener 200 kg/cm2 (19.6 MPa) y 250 kg/cm2 (24.5 MPa). El principal objetivo de este trabajo es el de evaluar la influencia que tiene la resistencia a la compresión del concreto en la sobrerresistencia estimada a flexión empleando modelos analíticos que se encuentran en los reglamentos de diseño como lo son las NTC–04 y el ACI 318–11.

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Cómo citar

[1]
“Modelo de simulación para estimar la sobrerresistencia a flexión de elementos de concreto”, DYNA, vol. 84, no. 200, pp. 112–120, Jan. 2017, doi: 10.15446/dyna.v84n200.52903.