Influence of cover thickness in structural frames exposed to fire and service loads

Vishal, M.; Srinivasan, Satyanarayanan Kachabeswara

doi:10.1007/s11356-021-15925-9

Cited by 6 publications

(13 citation statements)

References 36 publications

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“…The dimensions of the column and beam considered in this study were taken from previous research (Vishal et al. , 2022; Vishal and Satyanarayanan, 2022; Murugan and Srinivasan, 2021). The column has a height of 3,000 mm, width of 300 mm at a depth of 400 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The dimensions and the reinforcement details were same for the beam and column specimens, only the cover region changes for all the specimens. The dimensions of the column and beam considered in this study were taken from previous research Murugan and Srinivasan, 2021). The column has a height of 3,000 mm, width of 300 mm at a depth of 400 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The failure of a single structural element may trigger the failure of an entire structure. This phenomenon is termed progressive collapse (Murugan and Srinivasan, 2021; Parthasarathi et al ., 2022; Vishal and Satyanarayanan, 2021). While designing as well as during construction, columns and beams were given the most priority compared to any other structural member.…”

Section: Introductionmentioning

confidence: 99%

“…The current issue and full text archive of this journal is available on Emerald Insight at: https://www.emerald.com/insight/2040-2317.htm single structural element may trigger the failure of an entire structure. This phenomenon is termed progressive collapse (Murugan and Srinivasan, 2021;Parthasarathi et al, 2022;. While designing as well as during construction, columns and beams were given the most priority compared to any other structural member.…”

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confidence: 99%

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Study on optimum concrete cover thickness in RC beam and columns under high temperature

Vishal

Satyanarayanan²

2023

JSFE

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PurposeThis study delineates the effect of cover thickness on reinforced concrete (RC) columns and beams under an elevated fire scenario. Columns and beams are important load-carrying structural members of buildings. Under all circumstances, the columns and beams were set to be free from damage to avoid structural failure. Under the high-temperature scenario, the RC element may fail because of the material deterioration that occurs owing to the thermal effect. This study attempts to determine the optimum cover thickness for beams and columns under extreme loads and fire conditions.Design/methodology/approachCover thicknesses of 30, 40, 45, 50, 60 and 70 mm for the columns and 10, 20, 25, 30, 35, 40, 50, 60 and 70 mm for the beams were adopted in this study. Both steady-state and transient-state conditions under thermomechanical analysis were performed using the finite element method to determine the heat transfer through the RC section and to determine the effect of thermal stresses.FindingsThe results show that the RC elements have a greater influence on the additional cover thickness at extreme temperatures and higher load ratios than at the service stages. The safe limits of the structural members were obtained under the combined effects of elevated temperatures and structural loads. The results also indicate that the compression members have a better thermal performance than the flexural members.Research limitations/implicationsNumerical investigations concerning the high-temperature behavior of structural elements are useful. The lack of an experimental setup encourages researchers to perform numerical investigations. In this study, the finite element models were validated with existing finite element models and experimental results.Practical implicationsThe obtained safe limit for the structural members could help to understand their resistance to fire in a real-time scenario. From the safe limit, a suitable design can be preferred while designing the structural members. This could probably save the structure from collapse.Originality/valueThere is a lack of both numerical and experimental research works. In numerical modeling, the research works found in the literature had difficulties in developing a numerical model that satisfactorily represents the structural members under fire, not being able to adequately understand their behavior at high temperatures. None of them considered the influence of the cover thickness under extreme fire and loading conditions. In this paper, this influence was evaluated and discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Study on optimum concrete cover thickness in RC beam and columns under high temperature

Vishal

Satyanarayanan²

2023

JSFE

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“…There are also studies that concentrates upon the RC frames thickness of the cover with ABAQUS. The results showed that the thermal resistivity and performance of the structure increased with the thickness of cover of 45mm with improved durability [19]. Another analysis on the 3D RC prototype of single-storey under elevated temperatures with ABAQUS showed that the in lls and slab into the RC frames can increase the performance of the frames with improved stiffness [20].…”

Section: Literature Reviewmentioning

confidence: 97%

Evaluation of RC Elements Under High-Temperature Conditions with different Locations: Analytical Investigation

Parthasarathi

Satyanarayanan

Prakash

et al. 2023

Preprint

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Developments in the field of construction has taken an encompassing transformation in the design of structures. Concrete technology has also seen several advancements with the inclusion of reinforcement materials like steel and iron in them which are called as the (RC) Reinforced Concrete. Amidst several developments in the technology of the structural design for a quality construction, RC structural element failure under higher temperature with load remains as one of the most critical mechanisms to be addressed with the recent advancements. There are several methods and studies that try to rule out such failure mechanism with certain improvised methodologies in the fire resistivity behavior of concrete structures. Nevertheless, only a few studies have concentrated on the interaction between the structural and functional elements in the emergence of fire. Considering this, the present work concentrates on the behavior of RC infilled frames with elements like beam, column and beam column joints under higher temperatures and load for which the ABAQUS finite element software is used. The model is simulated with a transient state analysis and characteristics like deflection, stiffness, principal stress are studied for the RC beam, column and beam column joints with varied temperature and load. The outcome of the simulation shows the effect of load and temperature on RC elements and the respective performance graphs are plotted.

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Interface pressure optimization in a masonry-infilled single bay seven-storey RC frame with an adaptive pneumatic interface using ANN

2023

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Influence of cover thickness in structural frames exposed to fire and service loads

Cited by 6 publications

References 36 publications

Study on optimum concrete cover thickness in RC beam and columns under high temperature

Study on optimum concrete cover thickness in RC beam and columns under high temperature

Evaluation of RC Elements Under High-Temperature Conditions with different Locations: Analytical Investigation

Interface pressure optimization in a masonry-infilled single bay seven-storey RC frame with an adaptive pneumatic interface using ANN

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