Model of local buckling in steel hollow structural elements subjected to biaxial bending

Guerrero, Néstor; Marante, Marı́a Eugenia; Picón, Ricardo; Flórez-López, Julio

doi:10.1016/j.jcsr.2006.08.006

Cited by 22 publications

(8 citation statements)

References 25 publications

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“…If the present means are used, the kinematics of the hinge, lumped at the base of the weld, may be evaluated by discarding the incriminated zone in the correlation analysis and then extrapolating the rotation field at the point of interest, namely, the base of the weld. This procedure would then give the information needed to determine the plastic hinge behavior in the pre-and post-buckled regimes for a subsequent use in frame calculations [43]. This work is underway.…”

Section: Detection Of Locally Buckled Zonementioning

confidence: 99%

Displacement measurement technique for beam kinematics

Hild

Roux

Gras

et al. 2009

Optics and Lasers in Engineering

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a b s t r a c tIt is proposed to develop a digital image correlation procedure that is suitable for beams whose kinematics is described by an Euler-Bernoulli hypothesis. As a direct output, the degrees of freedom corresponding to flexural and axial loads are directly measured. The performance of the correlation algorithm is evaluated by using a picture of a cantilever beam experiment. One load level is analyzed with the present algorithm. The latter is validated by comparing the displacement field with that given by a finite element based correlation algorithm. It is also shown that a locally buckled zone is detectable with the present procedure.

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Section: Detection Of Locally Buckled Zonementioning

confidence: 99%

Displacement measurement technique for beam kinematics

Hild

Roux

Gras

et al. 2009

Optics and Lasers in Engineering

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“…LDM was firstly formulated for reinforced concrete structures under seismic loads [21][22][23]. Afterwards, LDM was rapidly expanded for other reinforced concrete structures [24][25][26][27][28][29][30][31][32], as well as steel frames [33][34][35][36], plain concrete tunnel linings [37] and masonry arches [37][38]. Note that LDM models present objective solutions [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

On the lumped damage modelling of reinforced concrete beams and arches

Brito

Santos

et al. 2020

Frattura Ed Integrità Strutturale

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The analysis of reinforced concrete structures can be performed by means of experiments or numerical studies. The first way is usually quite expensive, so the second one sometimes is a good option to understand the physical behaviour of actual structures. Lumped damage mechanics appears as one of the latest nonlinear theories and presents itself as an interesting alternative to analyse the mechanical behaviour of reinforced concrete structures. The lumped damage mechanic applies concepts of the classic fracture and damage mechanics in plastic hinges for nonlinear analysis of reinforced concrete structures. Therefore, this paper deals with a novel physical definition of the correction factor γ for cracking evolution that ensures the presented lumped damage model depicts accuracy when it is compared to experimental observations of reinforced concrete beams and arches. Based on such experiments, the numerical analysis showed that γ value has upper and lower thresholds, depending on the physical and geometric properties of the reinforced concrete element. Notwithstanding, for γ values inside of the proposed interval, there is a best value of γ.

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“…Entre las herramientas numéricas de análisis, podemos citar el Método de Elementos Finitos (MEF). Las estructuras tradicionales están conformadas con materiales homogéneos y dimensiones regulares, por esta razón el método de análisis empleado en preferencia es el MEF (1,2,3). Por el contrario, las estructuras No Tradicionales están conformadas por elementos heterogéneos que combinan diferentes tipos de materiales y con secciones transversales compuestas por diversos materiales, lo que dificulta definir las propiedades mecánicas de la sección transversal de los elementos que lo conforman.…”

Section: Introductionunclassified

“…Las variables de daños en elementos de hormigón armado miden el nivel de fisuración o agrietamiento que sufre el hormigón (4, 5), mientras que en las estructuras de acero, las variables de daño miden el grado de pandeo local del elemento de acero (1). Ambos fenómenos físicos (grietas o fisuras en el hormigón y pandeo local del perfil de acero) provocan la pérdida de rigidez del elemento y por ende de la estructura.…”

Section: Introductionunclassified

Estudio experimental y simulación del comportamiento inelástico de paneles compuestos usando redes neuronales artificiales

Barreto

Picón

2020

Inf. constr.

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El análisis de estructuras complejas, como los paneles compuestos de varios materiales, es difícil de modelar producto de la variabilidad en las propiedades mecánicas de los materiales. Lo anterior, aunado a la no-linealidad en el comportamiento de los materiales, hace que la aplicación de los métodos tradicionales de cálculo numérico sea difícil y demande mayor tiempo de cómputo. El presente trabajo introduce técnicas menos convencionales de cómputo como lo son las redes neuronales artificiales (RNA) para la modelación de la deformación permanente y daños en una losa compuesta sujeta a flexión. Se entrenaron y verificaron 400 modelos de RNA, los cuales fueron capaces de modelar la no linealidad del elemento estructural a flexión, reproducir exitosamente los daños por agrietamiento y pandeo del panel, así como reproducir la deformación permanente global del elemento estudiado.

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Model of local buckling in steel hollow structural elements subjected to biaxial bending

Cited by 22 publications

References 25 publications

Displacement measurement technique for beam kinematics

Displacement measurement technique for beam kinematics

On the lumped damage modelling of reinforced concrete beams and arches

Estudio experimental y simulación del comportamiento inelástico de paneles compuestos usando redes neuronales artificiales

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