Análisis plástico y Ensayos de Losas multidireccionales de HRFA

Maturana, A.; Canales, J.; Orbe, Aimar; Cuadrado, Jesús

doi:10.3989/ic.13.021

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…In already constructed HRC flat slabs, generally, the absence of cracking under quasi‐permanent load combinations was pointed out which permitted to evaluate the produced deformations as for an isotropic linear elastic material 15,25 . However, the presence of cracks in this type of elements is expectable—in accordance with ACI 421.3R‐15, microcraking in two‐way concrete slabs starts at an early level of approximately 10% of the service load, whereas the pattern of potential yield lines is almost fully developed at 30% of the same load 57…”

Section: Proposed Design Approachmentioning

confidence: 99%

A limit state design approach for hybrid reinforced concrete column‐supported flat slabs

Aidarov

Tošić

Antequera

2022

Structural Concrete

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Hybrid reinforced technology (combination of steel reinforcing bars and fibers) can be considered as a competitive alternative to the already existing solutions for the construction of column-supported flat slabs. Constructed hybridreinforced buildings prove that hybrid solutions have sufficient bearing capacity to maintain structural integrity despite being exposed to high stress levels, thereby providing a beneficial solution in terms of toughness, ductility, and sustainability performance. However, the lack of design-oriented recommendations based on the accepted limit state format for dealing with both serviceability and ultimate limit states slows down the wider implementation of this technology. Considering the above-mentioned, this article presents a simplified design-oriented method that covers the evaluation of the structural response of hybrid reinforced concrete column-supported flat slabs in terms of flexural strength, cracking, and instantaneous deformations. Two hybrid reinforced alternatives for a given flat slab are studied by means of the proposed approach. Furthermore, a nonlinear finite element analysis is carried out in order to evaluate the effectiveness of the developed simplified method. Based on the achieved results, its suitable accuracy and precision can be pointed out. This outcome may motivate current practitioners to consider hybrid reinforced concrete solutions as a possible alternative during the design of residential and office buildings.

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Section: Proposed Design Approachmentioning

confidence: 99%

A limit state design approach for hybrid reinforced concrete column‐supported flat slabs

Aidarov

Tošić

Antequera

2022

Structural Concrete

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“…In this regard, results derived from experimental programs revealed that the use of SFRC in this structural typology leads to enhanced cracking control [1][2][3][4] and required ductility [5][6][7] to allow for stress redistribution. 1,3,4,7 The design-oriented studies in this field have proposed analytical approaches 2,[8][9][10][11][12][13] and methods based on linear elastic 14 or nonlinear [15][16][17][18][19][20][21] finite element (FE) simulations focused on the design of flexuralgoverned SFRC slabs.…”

Section: Introductionmentioning

confidence: 99%

Influence of fiber orientation on flexural‐based design of steel fiber‐reinforced concrete slabs: Experimental and numerical program

Aidarov,

Nogales,

Tošić

et al. 2024

Structural Concrete

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Steel fiber‐reinforced concrete (SFRC) has proven to be a suitable structural material for constructing elevated flat slabs, and several existing office and residential buildings, in which SFRC was used for these components, highlighted the positive outcomes from both technical and sustainability perspectives. However, research on the influence of fiber orientation on the flexural performance of SFRC slabs is relatively scarce despite the fact that a number of studies revealed that the use of constitutive models derived from three‐point bending tests on notched beams leads to overestimations of the bearing capacity of statically indeterminate slabs. In this context, this study aims at presenting an extensive experimental program that consisted of testing three SFRC slabs (3.0 × 3.0 × 0.1 m3) subjected to point load under a statically indeterminate test configuration. The testing procedure was followed by the extraction of 88 cores in order to analyze both fiber distribution and orientation by means of a non‐destructive inductive method. The results indicate that lower orientation numbers were observed in cylinders drilled from the slabs in comparison with those observed in the 150 × 150 × 600 mm3 notched reference beams tested to characterize the pre‐ and post‐cracking flexural performance of the SFRC produced. Based on these results, a straightforward design‐oriented approach to compute an orientation factor was proposed and considered to develop the constitutive law used to simulate the structural response of SFRC slabs by means of nonlinear finite element model. The numerical simulation results showed a good agreement with the experimental response, this evidencing that the orientation factor may permit to account for the differences caused by geometric and statistical scale‐induced factors between both the beams used for the SFRC flexural properties characterization and slabs produced with the same SFRC.

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“…This matches how real case applications have evolved, from early usage on slabs-on-grade (with very low demands) to precast tunnel segment linings (compression under service and a relatively low bending and concentrated loads during construction phases), to one of the latest use cases, elevated slabs (bending and shear are the main design forces). Recent experiences with FRC elevated slabs from real-world applications and research campaigns showed that fibers can effectively replace all (or almost all) conventional reinforcement despite the increase of internal forces compared to initial slab-on-grade loads [7][8][9].…”

Section: Introductionmentioning

confidence: 99%