A comparative study between experimental and theoretical buckling load for hollow steel column

Kashyap, S. K.; Kumar, Shravan; Mallick, Mousumi; Singh, Rudra Pratap; Verma, Manoranjan

doi:10.4314/ijest.v10i3.3

Cited by 4 publications

(8 citation statements)

References 6 publications

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“…This suggests that the Euler's equation for buckling load may not be suitable for columns with slenderness ratio less than 70. The findings from the study conducted by Kashyap et al [10] suggest that Euler's model for estimating buckling load may not be suitable for short columns.…”

Section: Modelling Strategymentioning

confidence: 99%

“…Recently, Kashyap et al [10] carried out a comparative analysis between theoretical and experimental buckling loads for hollow steel columns. They [10] examined five hollow steel columns having the same length and external diameter with varying wall thicknesses. Their findings show that, for the columns examined, the Euler's model for the buckling load is overly unconservative when compared with experimental values.…”

Section: Related Studiesmentioning

confidence: 99%

“…However, the experimental values were reasonably in good agreement with the values obtained using the Rankine's model. Kashyap et al [10] further emphasised that the variation in experimental values and those obtained using the Rankine's model could be due to eccentricities and other related imperfections that are likely during experimental trials. Nevertheless, it was discovered that the variation in the buckling capacity of the column between experimental and Rankine's values with respect to wall thickness was parabolic.…”

Section: Related Studiesmentioning

confidence: 99%

“…To verify the numerical tool-Abaqus implemented in the calculation, a scoping study was taken from the literature [10] and analysed. The column is a hollow circular section having the geometric properties and boundary conditions shown in Table 2.…”

Section: Modelling Strategymentioning

confidence: 99%

“…After measuring the released strains, the stresses can then be calculated. It can be surmised that the forcedisplacement model of equation 13is equivalent in behaviour to that of equations (10) and (12) we have a relationship between the force components in the local and global coordinate systems as given in equation 14:…”

Section: Modelling Strategymentioning

confidence: 99%

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Numerical analysis of steel columns subject to eccentric loadings

Ufuah¹

2021

J. Adv. Sci. Eng.

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Buckling of framed and plated structures has been a great concern that researchers try to handle over the past decades. In most developing nations such as ours, fewer or no experimental trials are available to obtain requisite information for the proper understanding of this phenomenon. It is on this premise that an attempt is made to conduct a preliminary study to numerically evaluate the buckling of steel columns under eccentric loadings. To achieve this, a static, linear perturbation analysis was initially performed on a pin-ended steel column using the subspace Eigen solver for the different buckled mode shapes to illustrate the likely behaviour of the column when subjected to compressive actions. Then, the static, general analysis was conducted with the column subjected to varying magnitudes of eccentric loadings. It was required to determine the load level at which the column would fail when subjected to these eccentric loadings. Consequently, a base load value equivalent to 10 % of Euler's critical buckling load was used. This load value was thereafter increased by 20 % in sequence. It was discovered that 10 % of the Euler's critical buckling load can alter the stiffness of the column when loaded eccentrically. It was further observed that the steel column finally failed at a load greater than 20 % of the Euler's critical buckling load and 40.1% of Rankine's critical buckling load. This is because the permissible deflection for unbraced columns may be taken as the quotient of effective length of column to 250, which translates to 13.8 mm. Therefore, the maximum deflection of 14.72 mm reached by applying an eccentric load of 514 kN exceeds the allowable limit of 13.8 mm.

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Section: Modelling Strategymentioning

confidence: 99%

Section: Related Studiesmentioning

confidence: 99%

Section: Related Studiesmentioning

confidence: 99%

Section: Modelling Strategymentioning

confidence: 99%

Section: Modelling Strategymentioning

confidence: 99%

See 3 more Smart Citations

Numerical analysis of steel columns subject to eccentric loadings

Ufuah¹

2021

J. Adv. Sci. Eng.

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Design and development of a table-mounted manual drilling machine for the rural purpose

Banjo

Babalola

osagie³

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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This paper presents a simple and flexible table mounted manual drilling machine designed and developed for rural applications to drill metallic and non-hardened material manually. The drilling machine is one of the essential devices with its applications where a circular cross-section hole is required. However, the manually operated drilling machine was developed for small drilling operations. It eradicated the major challenge of the inability to access electricity in most hamlets and villages across the country where solid materials such as wood and metalwork were engaged daily. The lack of power has deteriorated the economy and reduced some essential services to minimum benefit in those vulnerable areas. The high cost of equipment, especially the highly technological machines, has prompted the implementation of the simple but technically based manual drilling machine (MDM). The use of the manual approach in producing holes in solid materials is of more significant advantage in the rural communities where their sources of income and purchasing power are deficient.

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Evaluation of a constructed manual drilling machine for small scale operation

Banjo

Joseph

Fayomi

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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In this study, a critical analysis was carried out on the various classes of drilling machine to establish their performance based on their applications and also, to have comparative evaluation between electrically driven drilling machines (EDDM) and manually operated drilling machine (MODM). In the ancient days, flat punch was used to make holes on materials, but due to advancements in technology, drilling machines are now being used instead, making the work easier and faster. There are different drilling machines, including radial, sensitive, upright, gang, deep hole, multiple spindles, and automated drilling machines. Also, an indigenous table-mounted manual drilling machine was fabricated, with a rigid and robust structure but flexible to operate enhances the production of the hole on solid materials such as metal, wood, Teflon, and other materials. This evaluation has provided an enormous privilege for the manual operated drilling machine to be employed for small scale operation (SSO) and to serve as a relief to the less privilege communities. More so, this simple method would save the end-user from the unnecessary expense on fuel and expensive bills.

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A comparative study between experimental and theoretical buckling load for hollow steel column

Cited by 4 publications

References 6 publications

Numerical analysis of steel columns subject to eccentric loadings

Numerical analysis of steel columns subject to eccentric loadings

Design and development of a table-mounted manual drilling machine for the rural purpose

Evaluation of a constructed manual drilling machine for small scale operation

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