Parametric analysis on punching shear resistance of reinforced-concrete continuous slabs

Belletti, Beatrice; Muttoni, Aurelio; Ravasini, Simone; Vecchi, Francesca De

doi:10.1680/jmacr.18.00123

Cited by 25 publications

(12 citation statements)

References 31 publications

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“…The shrinkage effect in PARC_CL 2.1 model has been applied considering an average deformation, without resolving the solution of thermo-hygrometric problems and neglecting temporal and spatial evolution of the phenomenon. 31 The creep effects have been applied by imposing a temperature gradient to the nodes of the mesh.…”

Section: Prestressing Force and Lossesmentioning

confidence: 99%

“…26 The VIGA 470 is one of the 14 naturally corroded prestressed beams coming from a natural gas power station and characterized by nonuniform corrosion (pitting) induced by chlorides. The numerical analyses are conducted using the PARC_CL 2.1 crack model developed at the University of Parma, 30,31 considering the spatial distribution of the corrosion pattern provided by experimental evidences.…”

Section: Introductionmentioning

confidence: 99%

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Numerical evaluation of the corrosion effects in prestressed concrete beams without shear reinforcement

Belletti

Vecchi

Bandini

et al. 2020

Structural Concrete

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Corrosion of prestressed concrete structures causes size reduction of strands, degradation of mechanical properties of steel, cracking of the surrounding concrete, and bond decay at steel-to-concrete interface. In this paper, a numerical approach able to take into account all the effects involved in the corrosion process by using nonlinear finite element analysis (NLFEA) and membrane or shell elements modeling is proposed. Two different strategies are adopted to model strands: the smeared and the discrete approaches. The results obtained using these latter strategies are validated by comparing NLFEA results with experimental measurements of a naturally corroded prestressed beam tested at the "Instituto de Ciencias de la Construcción Eduardo Torroja" in Madrid. Finally, pros and cons of the proposed modeling approach are critically analyzed, demonstrating that considering the actual spatial corrosion distribution is necessary to predict the position where failure occurs.

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Section: Prestressing Force and Lossesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of the corrosion effects in prestressed concrete beams without shear reinforcement

Belletti

Vecchi

Bandini

et al. 2020

Structural Concrete

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“…These observations, with the complementary key findings from the numerical investigations described in Sections 2 and 3, enable the validation of analytical models for a wide range of RC slab systems with shear-heads as described below. 22…”

Section: Concrete Strengthmentioning

confidence: 99%

“…Non-linear finite element simulations can offer insights into the structural behaviour and can predict the ultimate strength and deformational response of RC flat slabs and members (e.g. [22][23][24][25][26][27][28]).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear numerical simulation of punching shear behaviour of reinforced concrete flat slabs with shear-heads

Bompa¹,

Elghazouli²

2019

Preprint

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This paper examines the structural response of reinforced concrete flat slabs, provided with fully-embedded shear-heads, through detailed three-dimensional nonlinear numerical simulations and parametric assessments using concrete damage plasticity models. Validations of the adopted nonlinear finite element procedures are carried out against experimental results from three test series. After gaining confidence in the ability of the numerical models to predict closely the full inelastic response and failure modes, numerical investigations are carried out in order to examine the influence of key material and geometric parameters. The results of these numerical assessments enable the identification of three modes of failure as a function of the interaction between the shear-head and surrounding concrete. Based on the findings, coupled with results from previous studies, analytical models are proposed for predicting the rotational response as well as the ultimate strength of such slab systems. Practical recommendations are also provided for the design of shear-heads in RC slabs, including the embedment length and section size. The analytical expressions proposed in this paper, based on a wide-ranging parametric assessment, are shown to offer a more reliable design approach in comparison with existing methods for all types of shear-heads, and are suitable for direct practical application.

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“…To avoid previously mentioned mesh-dependency problems the crack band model with constant facture energy in which the tensile response is a function of the characteristic element length, may be considered. Models employing such approaches were able to predict the ultimate strength and deformational response of plain and reinforced concrete members (e.g., localized behavior under direct shear and tension [58,59], assessment of a long-term behavior [60], RC flat slabs with and without shear reinforcement under static loading [61][62][63], RC hybrid beams in shear and flexure [64][65][66][67]). However, detailed numerical studies on flat slabs with shear-heads are relatively limited and have typically focused on hybrid connections between steel columns and RC floors.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads

Bompa

Elghazouli

2020

Front. Struct. Civ. Eng.

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This paper examines the structural response of reinforced concrete flat slabs, provided with fullyembedded shear-heads, through detailed three-dimensional nonlinear numerical simulations and parametric assessments using concrete damage plasticity models. Validations of the adopted nonlinear finite element procedures are carried out against experimental results from three test series. After gaining confidence in the ability of the numerical models to predict closely the full inelastic response and failure modes, numerical investigations are carried out in order to examine the influence of key material and geometric parameters. The results of these numerical assessments enable the identification of three modes of failure as a function of the interaction between the shear-head and surrounding concrete. Based on the findings, coupled with results from previous studies, analytical models are proposed for predicting the rotational response as well as the ultimate strength of such slab systems. Practical recommendations are also provided for the design of shear-heads in RC slabs, including the embedment length and section size. The analytical expressions proposed in this paper, based on a wide-ranging parametric assessment, are shown to offer a more reliable design approach in comparison with existing methods for all types of shear-heads, and are suitable for direct practical application.

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Parametric analysis on punching shear resistance of reinforced-concrete continuous slabs

Cited by 25 publications

References 31 publications

Numerical evaluation of the corrosion effects in prestressed concrete beams without shear reinforcement

Numerical evaluation of the corrosion effects in prestressed concrete beams without shear reinforcement

Nonlinear numerical simulation of punching shear behaviour of reinforced concrete flat slabs with shear-heads

Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads

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