Comportamento em serviço de lajes mistas de aço e concreto ao longo do tempo

Oliveira, Lucas Antonio Morais

doi:10.11606/d.18.2019.tde-23052019-091011

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Nevertheless, the experimental investigations have shown that this procedure leads to non-conservative estimates of the deflections, such as for beams (Patel, Bhardwaj, Chaudhary & Nagpal, 2015), but especially for composite slabs subjected to higher loads (Costa et al, 2021). However, studies using more recent literature such as the Australian standard, which consider a different equation to calculate the effective moment of inertia and the influence of more variables on the deflection, have resulted in displacements closer to those observed experimentally, as demonstrated by Oliveira (2019).…”

Section: Introductionmentioning

confidence: 88%

Proposition for the effective moment of inertia to determine the deflection in a composite slab

Costa,

Marconi,

Tomita

et al. 2024

Cad. Pedagógico

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The objective of this work is to propose a mathematical expression for calculating the effective moment of inertia of a composite slab that utilizes steel formwork incorporated into the concrete, and consequently, to verify the deflection. The analysis of the behavior and strength of composite steel and concrete slabs covers several parameters, such as load-deflection curves, load-end slip curves, and load-steel strain curves. Among these parameters, the load versus deflection curve at the mid-span perform a crucial role in the evaluation and verification of deflection. Regarding the calculation of deflection, generally, the technical standards recommend that the moment of inertia of the composite section be given by the simple average of the moments of inertia of the uncracked and cracked sections. However, experimental investigations have shown that this procedure inadequately characterizes composite slab behavior, resulting in underestimated effective moment of inertia and reduced deflection, especially when subjected to higher loads. Using the results of experimental tests on a composite slab built with a specific steel sheeting carried out at the Structures Laboratory of the Federal University of Minas Gerais, this work evaluated several expressions suggested by technical standards and authors of scientific articles aiming to validate a proposal for determining the moment of effective inertia in composite slabs that adequately represents the behavior load versus deflection during the entire loading phase until collapse. From this evaluation it is possible to recommend the proposed equation for design verification in the case of the service limit state for excessive deformations.

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Section: Introductionmentioning

confidence: 88%

Proposition for the effective moment of inertia to determine the deflection in a composite slab

Costa,

Marconi,

Tomita

et al. 2024

Cad. Pedagógico

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“…Essa fôrma foi estudada por Sieg (2015), que fez a análise teórica do perfil de aço e uma análise teórica e experimental de lajes mistas compostas por essa fôrma. Oliveira (2019) também empregou essa mesma fôrma de aço nas lajes mistas do seu trabalho, porém avaliando seu comportamento em serviço.…”

Section: Considerações Geraisunclassified

Análise numérica e experimental do comportamento da interface aço-concreto de lajes mistas

Rodrigues¹

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Comportamento em serviço de lajes mistas de aço e concreto ao longo do tempo

Abstract: MORAIS OLIVEIRA, L. A. In service behavior of steel-concrete composite slabs under the long-term conditions. 2019. 250p. Dissertation (M. Sc. in Civil Engineering (Structures))

Cited by 2 publications

References 17 publications

Proposition for the effective moment of inertia to determine the deflection in a composite slab

Proposition for the effective moment of inertia to determine the deflection in a composite slab

Análise numérica e experimental do comportamento da interface aço-concreto de lajes mistas

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