Improved method for deflection control of reinforced concrete structures

Pecić, Nenad

doi:10.2298/bg20130416pecic

Cited by 6 publications

(22 citation statements)

References 2 publications

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“…There is a larger discrepancy in the initial deflection, which can only partially be explained by uncertainties tied to the tensile strength and fracture energy. Still the results are within 30% which can be considered a limit for "satisfactory" models [14]. The results are more accurate for the long-term deflection which follows the experimental curve rather well and ends within 10% of the measured value, enough to deem the model "good" [14].…”

Section: Initial Fe Model Descriptionmentioning

confidence: 78%

“…Still the results are within 30% which can be considered a limit for "satisfactory" models [14]. The results are more accurate for the long-term deflection which follows the experimental curve rather well and ends within 10% of the measured value, enough to deem the model "good" [14]. However, the fact that the difference is reduced from 30% to 10% during the time analysis can indicate that the creep and shrinkage models underestimate deflection.…”

Section: Initial Fe Model Descriptionmentioning

confidence: 86%

“…The research performed by Washa and Fluck [19] is practically the first systematical and methodical research of long-term behavior of RC beams [14]. Beams of different cross sections and different amounts of compressive reinforcement were loaded by a uniformly distributed load after 14 days and deflections were measured for 2 1/2 years (913days).…”

Section: Model Validation On Simply Supported Beamsmentioning

confidence: 99%

See 2 more Smart Citations

Calibrating and validating a FE model for long-term behavior of RC beams

Tošić¹,

Marinković²

2014

Tehnika

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Section: Initial Fe Model Descriptionmentioning

confidence: 78%

Section: Initial Fe Model Descriptionmentioning

confidence: 86%

Section: Model Validation On Simply Supported Beamsmentioning

confidence: 99%

See 1 more Smart Citation

Calibrating and validating a FE model for long-term behavior of RC beams

Tošić¹,

Marinković²

2014

Tehnika

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“…The long‐term curvatures κ I and κ II can be calculated in a dimensionless way by applying a suitable set of commonly used parameters . The mean curvature in Equation can be expressed in a dimensionless form using parameter C :

C = \frac{α f_{c t, red}}{σ_{s}} .

…”

Section: Calculation Of the Deflection By Integrating The Long‐term Cmentioning

confidence: 99%

“…For statically indeterminate structures, the internal forces should be redistributed prior to the curvatures calculation, to ensure reliable results . Such redistribution is seldom supported by common design software.…”

Section: Calculation Of the Deflection By Integrating The Long‐term Cmentioning

confidence: 99%

Verification of deflection according to Eurocode 2

Pecić

Mašović

Stošić

2017

Structural Concrete

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Code provisions for a simplified check of the long‐term deflection of concrete structures are generally developed for predefined values of the relevant input parameters. Deflection calculation may be of interest to account for different design situations. EN 1992‐1‐1 advocates the integration of curvatures calculated using the effective modulus of concrete. This paper presents an efficient procedure for calculation of the long‐term deflection due to a sustained load. A nondimensional analysis of the mean curvature is applied to evaluate the deflection. The deflection is calculated using a set of algebraic expressions. The result is close to the value obtained by the numerical integration of curvatures. The values of relevant parameters in the expressions may be selected within the common range for the design of engineering structures. The efficiency of the deflection prediction based on the integration of curvatures is tested on the available experimental data. In the first approach, the measured material properties are used. In the second approach, the required values are derived from EN 1992‐1‐1 expressions to predict the material properties.

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Deflection control for reinforced recycled aggregate concrete beams: Experimental database and extension of the fib Model Code 2010 model

Tošić

Marinković

Brito

2019

Structural Concrete

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Recycled aggregate concrete (RAC) has emerged as a viable solution for solving some of the environmental problems of concrete production. However, design guidelines for deflection control of reinforced RAC members have not yet been proposed. This study presents a comprehensive analysis of the applicability of the fib Model Code 2010 (MC2010) deflection control model to reinforced RAC beams. Three databases of long‐term studies on natural aggregate concrete (NAC) and RAC beams were compiled and meta‐analyses of deflection predictions by MC2010 were performed. First, the MC2010 deflection control model was tested against a large database of long‐term tests on NAC beams. Second, a database of RAC and companion NAC beams was compiled and initial and long‐term deflections were calculated using the MC2010 model. It was shown that deflections of RAC beams are significantly underestimated relative to NAC beams. Previously proposed modifications for MC2010 equations for shrinkage strain and creep coefficient were used, and new modifications for the modulus of elasticity and empirical coefficient β were proposed. The improved MC2010 deflection control model on RAC beams was shown to have equal performance to that on companion NAC beams. The proposals presented in this paper can help engineers to more reliably perform deflection control of reinforced RAC members.

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Improved method for deflection control of reinforced concrete structures

Cited by 6 publications

References 2 publications

Calibrating and validating a FE model for long-term behavior of RC beams

Calibrating and validating a FE model for long-term behavior of RC beams

Verification of deflection according to Eurocode 2

Deflection control for reinforced recycled aggregate concrete beams: Experimental database and extension of the fib Model Code 2010 model

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