Experimental study on shear behavior of fire-damaged reinforced concrete T-beams retrofitted with prestressed steel straps

Yang, Yong; Feng, Shi‐Jin; Xue, Yicong; Yu, Yunlong; Chen, Yang

doi:10.1016/j.conbuildmat.2019.03.054

Cited by 34 publications

(11 citation statements)

References 17 publications

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“…In the research published by Yang et al [19], the main objective was to quantify the influence of various parameters on the behaviour of a reinforced-concrete T-beam confined by prestressed steel straps (PSS). Twelve samples of fire-damaged T-beans strengthened against shear by PSS method were considered.…”

Section: Beammentioning

confidence: 99%

“…After the T-beam strengthening by PSS method, the shear resistance and stiffness of RC beams exposed to fire was restored, and steel cables contributed to beam ductility, while also preventing development of cracks. The reduction of spacing between steel cables led to increase in the bearing capacity and stiffness of beams (it is important to note here that an excessive prestressing could limit shear resistance) [19].…”

Section: Beammentioning

confidence: 99%

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Overview of research on fire effects in RC elements and assessment of RC structures after fire

Lakušić¹

2021

JCE

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Procedures for estimating damage and remaining bearing capacity of RC structures after fire are presented in the paper. The paper describes the effect of fire on structures, the danger it poses for the loss of human lives, and financial losses it may generate. The damage to structural RC elements of a column, beam, slab, wall, and connection details, is presented in the paper. Although RC elements are generally considered to be fire resistant, their physical and mechanical characteristics are greatly influenced by temperature, while the bearing capacity before and after fire can be determined through a number of different methods that are presented in the paper. An overview of condition assessment for RC structures after fire is proposed, and methodology for taking further action is presented.

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Section: Beammentioning

confidence: 99%

Section: Beammentioning

confidence: 99%

Overview of research on fire effects in RC elements and assessment of RC structures after fire

Lakušić¹

2021

JCE

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“…It is known that fires can cause serious damage to reinforced concrete structural elements. In particular, the beams and slabs are located at the top of the building and are more prone to fire damage, as highlighted by Yang et al [1]. In the absence of a failure during the fire, measuring the level of damage caused after a fire is essential in deciding either to release the use, to repair or to demolish the structure.…”

Section: Introductionmentioning

confidence: 99%

Applicability of the 500°C isotherm method in determining the strength of reinforced concrete beams after fire

Costa

Silva

Pires

et al. 2022

Rev. IBRACON Estrut. Mater.

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A procedure to estimate the residual bending moment and the shear load capacity after fire in reinforced concrete beams was evaluated. The calculation method is based on the 500ºC Isotherm Method, adopting the reduction coefficients proposed by Van Coile et al. (2014) for the steel yield strength. The proposed method validation was done from experimental results of 62 reinforced concrete beams available in the literature. It was possible to observe a good approximation of the analytical method with the experimental data. For the bending moment an average ratio M r ana / M r exp of 1.04 and standard deviation of 0.15 was found. For the shear force an average ratio V r ana / V r exp of 0.85 and standard deviation of 0.23 was found.

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“…While a few of them worked on shear strength improvement in concrete beams after exposing them to fire (Y. Yang et al, 2019). M. Setkit and T. Imjai (2019) used PTMS to strengthen the beams that failed in bending.…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength of Uncured Concrete Cylinders Fully Wrapped with Post-Tensioned Metal Straps (PTMS).

Abdullah

Rafiq

2021

JER is an international, peer-reviewed journal that publishes f

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During a national lock down and a curfew, most of the concrete projects are left without curing and therefore, the elements of the building need strengthening. An effective way in strengthening is using Post-Tensioned Metal Straps (PTMS) which is a relatively new method. Therefore, in this study, the effectiveness of using PTMS is tested in strengthening cylinder samples without curing. For this purpose, 15 cylinders are cast and 12 of them are left without curing for 28 days. Three samples are tested without any strengthening and are used as control samples. The rest are strengthened using 1, 2, 3, and full layers of PTMS. To compare the strength of the cylinders, 3 cylinders of the same batch are prepared and cured for 28 days. It is proved that the compressive strength of the cylinders can increase by 39%, 57%, 84% and 125% if the samples are strengthened using 1, 2, 3, and full layers of PTMS. It is also found that the failure becomes ductile as the number of layers is increased.

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Experimental study on shear behavior of fire-damaged reinforced concrete T-beams retrofitted with prestressed steel straps

Cited by 34 publications

References 17 publications

Overview of research on fire effects in RC elements and assessment of RC structures after fire

Overview of research on fire effects in RC elements and assessment of RC structures after fire

Applicability of the 500°C isotherm method in determining the strength of reinforced concrete beams after fire

Compressive Strength of Uncured Concrete Cylinders Fully Wrapped with Post-Tensioned Metal Straps (PTMS).

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