A review on research of fire-induced progressive collapse on structures

Vishal, M.; Satyanarayanan, K.S.

doi:10.1108/jsfe-07-2020-0023

Cited by 8 publications

(4 citation statements)

References 94 publications

(96 reference statements)

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“…Many analytical and experimental research works have been conducted in this area. However, facts tell us that the number of people who lose their lives is not due to the direct effect of the earthquake but to indirect effects such as fire, among many other things [1]. Hence, it is crucial that the materials used in building construction can withstand a fire for a certain period of time.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Hollow Steel Sections Under Elevated Temperature

Murugan,

Bahrami,

Murugan

et al. 2024

Civ Eng J

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Structures known as modular buildings are made in factories and then moved to construction sites, where they are assembled. The efficacy of modular structures under many uncertainties has to be thoroughly investigated as demand rises; fire is one such uncertainty. The purpose of this study is to ascertain how high temperature affects the components of modular constructions. In the current study, hollow steel columns and beams were taken into account as components of a modular construction. Using ABAQUS, several situations were examined depending on the span length to determine the important locations of the members. Experimental research was conducted on the critical regions identified by the analysis, and the results were contrasted with those of the analysis. A high-temperature localized heating furnace was used for the experimental testing. The findings demonstrated that for spans of 250 mm and 500 mm, the central area of the beams was essential, and the load-carrying capacity was six times less than that of heating at the extremities of the beams. Similar to the beams, columns exhibited less fluctuation than the beams and were weaker in the bottom area when exposed to high temperature. When compared to other places, the capacity was reduced by 1.1 times, and in Case 1, the capacity reduction with regard to loading was 1.68 times greater. Doi: 10.28991/CEJ-2024-010-03-014 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Hollow Steel Sections Under Elevated Temperature

Murugan,

Bahrami,

Murugan

et al. 2024

Civ Eng J

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“…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%

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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“…Concrete has high durability and serviceability, which favors its massive usage in the construction industry. There are several factors that affect the durability and serviceability of concrete, and one such concern is fire [1,2]. Whenever a concrete structure is subjected to fire accidents, concrete undergoes the effects of high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Whenever a concrete structure is subjected to fire accidents, concrete undergoes the effects of high temperatures. Concrete undergoes both physical and chemical changes when it is subjected to high temperatures [2,3]. The concrete structures' ability to carry loads decreases as a result of exposure to fire conditions.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Postfire Structural Performances of Concrete under Elevated Temperatures

Murugan,

Bahrami,

Srivastava

et al. 2023

Civ Eng J

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This article investigates the mechanical and postfire structural performances of concrete under elevated temperatures (200°C, 400°C, 600°C, and 800°C) after 7 and 28 days of concrete curing. The main objective of this study is to evaluate the post-fire behavior of concrete structures and how their modulus of elasticity values influence their structural parameters. Mechanical studies, namely, the compressive strength, splitting tensile strength, and flexural strength, were performed on cubes, cylinders, and prism beams under normal and elevated temperatures. Non-destructive tests, like rebound hammer and ultrasonic pulse velocity, were also conducted on concrete cubes to obtain the strength of concrete before and after heating the specimens. Microstructural studies, in particular, scanning electron microscope and energy dispersive x-ray spectroscopy, were done to analyze the changes in the chemical composition of concrete under the effect of the temperatures. The weight loss of the concrete specimens was assessed under the elevated temperatures. The results indicated that the geometric shapes of the specimens influenced the loss in the moisture content of concrete under an elevated temperature scenario. Microstructural studies revealed the changes in the chemical composition under the elevated temperatures. The results of this research can be further integrated for industrial applications. Doi: 10.28991/CEJ-2023-09-08-04 Full Text: PDF

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A review on research of fire-induced progressive collapse on structures

Cited by 8 publications

References 94 publications

Experimental Study on Hollow Steel Sections Under Elevated Temperature

Experimental Study on Hollow Steel Sections Under Elevated Temperature

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

Mechanical and Postfire Structural Performances of Concrete under Elevated Temperatures

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