On the behaviour of single-span steel beams under uniform heating

Mourão, Hellen dos R.; Silva, Valdir P. e

doi:10.1590/s1678-58782007000100015

Cited by 8 publications

(10 citation statements)

References 3 publications

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“…For the bending moment, the decrease for high temperature agrees with results in [2]. But at low temperatures, the authors of [2] obtained an increase of this moment depending on the loading level.…”

Section: Case Of Constant Loadsupporting

confidence: 83%

“…Solving the collapse problem can now be reduced to a comparison between the bending moment and the resistance moment in fire [2][3][4][5][6][7]. This is managed numerically by an algorithm which extracts the time corresponding to the condition M(t) ≥ M cr (t).…”

Section: Collapse Stressmentioning

confidence: 99%

“…In the presence of fire, physical, chemical and mechanical properties of structures change. For instance in the case of steel, the strength of the material reduces, the length increases and the modulus of elasticity decreases [1][2][3][4]. If the beam is mechanically loaded in addition to fire exposure, phenomenon such as breaking or collapse can occur and has to be investigated since the use of steel beam in industries and civil engineering structures is of prime importance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the dynamics of fire-exposed steel beam under mechanical load

Ndoukouo

Nubissie

Woafo

2011

Journal of Constructional Steel Research

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Section: Case Of Constant Loadsupporting

confidence: 83%

Section: Collapse Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the dynamics of fire-exposed steel beam under mechanical load

Ndoukouo

Nubissie

Woafo

2011

Journal of Constructional Steel Research

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“…They posited that the first stage constitutes the initiation mechanism of failure, involving the yielding of members before the inelastic regime and the reduction of Young's modulus. Mourão and Silva [2] investigated the expansion of steel beams caused by uniformly elevated temperatures and illustrated that in an axially restrained beam, the end supports resist against thermal expansion. Wong [3] demonstrated that the strength of a steel beam at room temperature is acceptable for design regardless of the existence of axially restrained boundary conditions or otherwise.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Performance of Slant End-Plate Connections at Elevated Temperature

Zahmatkesh¹,

Osman²,

Talebi³

et al. 2018

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Axially restrained steel beams exhibit lower structural efficiency when they are subjected to elevated temperature. Thermal expansion is one of the most hazardous conditions such beams could experience throughout their service life. In this regard, using an adequately performing connection can enhance the thermal performance of the beams. This paper, therefore, evaluates experimentally the performance of slant end-plate as a proposed connection for dissipating thermal expansion experienced by the steel beam. In this study, several experimental tests were carried out on two different specimens in terms of scaling and gravity loads to prove the hypothesis and results obtained from a present analytical study. The evaluation of tests and analytical results showed that both outcomes are consistent with each other with comparison ratios between 0.96 and 1.09. In addition, the experimental tests, as well as analytical outcomes, have proven that the slant end-plate connection can successfully reduce the additional thermally induced axial forces via the upward crawling mechanism.

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“…To characterize the behaviors of steels such that a full utilization of their special feature can be executed, Chen and Young (2006) had proposed a stress-strain model that unifies the yield strength, elastic modulus, ultimate strength, and ultimate strain of steel at elevated temperatures for general use. Mourão and E Silva (2007) had pointed out that it is insufficient to rely only on the consideration of reduction in strength and modulus of steel structure in the thermal load environment analyses, even when the heat is uniformly distributed. They suggested that the behavior of the structures including the realistic boundary conditions at high temperatures is required under such condition, indicating the significance of design details for the elevated temperature loading resistance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Structural Performance of Steel Beams with Slant End-plate Connections

Zahmatkesh

Osman

Talebi

et al. 2016

Lat. Am. j. solids struct.

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Thermal effects can be one of the most harmful conditions that any steel structure should expect throughout its service life. To counteract this effect, a new beam, with a capability to dissipate thermally induced axial force by slanting of end-plate connection at both ends, is proposed. The beam was examined in terms of its elastic mechanical behavior under symmetric transverse load in presence of an elevated temperature by means of direct stiffness finite element model. The performance of such connection is defined under two resisting mechanisms; by friction force dissipation between faces of slant connection and by small upward crawling on slant plane. The presented numerical method is relatively easy and useful to evaluate the behavior of the proposed beam of various dimensions at different temperatures. Its applicability is evident through satisfactory results verification with those from experimental, analytical and commercially available finite element software. Based on the good agreement between theoretical and experimental methods, a series of design curves were developed as a safe-practical range for the slant end-plate connections which are depend on the conditions of the connection.

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On the behaviour of single-span steel beams under uniform heating

Cited by 8 publications

References 3 publications

On the dynamics of fire-exposed steel beam under mechanical load

On the dynamics of fire-exposed steel beam under mechanical load

Experimental Study on the Performance of Slant End-Plate Connections at Elevated Temperature

Numerical Study on the Structural Performance of Steel Beams with Slant End-plate Connections

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