Papers by Javier Arredondo
Flow plasticity theory has been widely used for nonlinear simulation of reinforced concrete (RC) ... more Flow plasticity theory has been widely used for nonlinear simulation of reinforced concrete (RC) structures. Constitutive relations of flow plasticity theory in CAE software are referred to as material models. One of the most popular concrete models is the Menetrey-Willam model realized in ANSYS software. The Menetrey-Willam constitutive model can well capture many important mechanical behaviors of concrete such as different tensile and compression strength, nonlinear hardening, softening, and dilatancy. However, there is no published calibration methodology with a clear foundation based on structural design standards. This study suggests an effective calibration procedure to identify the input parameters for the Menetrey-Willam model, mainly according to the CEB-FIP Model Code. Firstly, the identified parameters were verified on basic material tests by a single element simulation. Verification revealed full compliance simulation results with the standards for uniaxial compression, uniaxial tension, and biaxial compression stress states. To validate the ability of the material model to objectively reproduce structural behavior we validated it on six structural tests: confined uniaxial compression of a cube specimen, four-point bending test of a RC beam, three-point bending test of a notched concrete beam, eccentric compression of a RC column, shear rupture test and push-off test of an S-shaped specimen. For all structural tests, a mesh sensitivity analysis was also carried out. The use of the proposed model parameters allows to achieve a good match with the experimental data for all the considered problems almost independently of the mesh size. The obtained parameters can be conveniently used for occasional users without special knowledge in the field of concrete mechanics.
Conference Presentations by Javier Arredondo
OPTIMIZACIÓN DE POSTES DE HORMIGÓN ARMADO PARA TENDIDO ELÉCTRICO, 2020
Argentinian National Standard IRAM 1603 establishes the characteristics of reinforced concrete po... more Argentinian National Standard IRAM 1603 establishes the characteristics of reinforced concrete poles with an annular section and frustoconical shape, which are used as support for overhead lines for the transmission of electrical energy and telecommunications. The standard specifies the test methods to which poles are subjected to determine their strength and characterize their behavior. The bending test is highlighted in its elastic phase and load phase until failure, so the value of the characteristic ultimate bending load (R) is obtained.
In this assay, the design and resistance requirements established by the standard are studied for a 9 meters long pole and 600 daN nominal strength. The structural behavior is numerically analyzed based on a parametric study for different concretes and reinforcements. From this analysis and taking into account different design alternatives, the cracking initiation load, the force-displacement curve and the failure load are determined in order to achieve an optimization of the material that satisfies the regulatory requirements.
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Papers by Javier Arredondo
Conference Presentations by Javier Arredondo
In this assay, the design and resistance requirements established by the standard are studied for a 9 meters long pole and 600 daN nominal strength. The structural behavior is numerically analyzed based on a parametric study for different concretes and reinforcements. From this analysis and taking into account different design alternatives, the cracking initiation load, the force-displacement curve and the failure load are determined in order to achieve an optimization of the material that satisfies the regulatory requirements.
In this assay, the design and resistance requirements established by the standard are studied for a 9 meters long pole and 600 daN nominal strength. The structural behavior is numerically analyzed based on a parametric study for different concretes and reinforcements. From this analysis and taking into account different design alternatives, the cracking initiation load, the force-displacement curve and the failure load are determined in order to achieve an optimization of the material that satisfies the regulatory requirements.