Stress-Strain-Temperature Relationship for Structural Steel

Poh, K. W.

doi:10.1061/(asce)0899-1561(2001)13:5(371)

Cited by 90 publications

(61 citation statements)

References 7 publications

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“…Poh [13] developed generalized temperature-stress-strain relations (shown in Figure 3) for structural steel based on large set of experimental data. These relations account for specific features, such as the yield plateau and the effect of strain hardening.…”

Section: Stress-strainmentioning

confidence: 99%

“…Temperature-Stress-Strain relations, for structural steel, specified in the codes and standards [11,12] do not properly account for high-temperature creep, which can be significant under fire exposure, especially prior to the failure of the member. Therefore, and in an attempt to understand the effect of high-temperature creep on the response of restrained steel beams, temperature-stress-strain relations recommended by Poh [13] were used in the analysis.…”

Section: Stress-strainmentioning

confidence: 99%

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Effect of Location of Restraint on Fire Response of Steel Beams

Dwaikat

Kodur

2009

Fire Technol

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Restrained steel beams, when exposed to fire, develop significant restraint forces and often behave as beam-columns. The response of such restrained steel beams under fire depends on many factors including: fire scenario, beam slenderness ratio, location of axial restraint at the supports, and high-temperature properties of steel. A set of numerical studies, using finite element computer program ANSYS, is carried out to study the fire response of steel beam-columns under realistic fire and restraint scenarios. Results from the parametric studies indicate that fire scenario, beam slenderness, location of axial restraint and high-temperature creep have significant influence on the behavior of restrained beams under fire conditions. Severe fires produce high axial forces at early stages of fire exposure; whereas in moderate fires, significant axial force develops only at later stages of fire exposure. Axial restraint enhances the fire resistance due to the development of tensile catenary action in restrained beams. Furthermore, restrained beams with low slenderness ratio exhibit better fire performance when the axial restraint at the support is located at the bottom flange.

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Section: Stress-strainmentioning

confidence: 99%

Section: Stress-strainmentioning

confidence: 99%

Effect of Location of Restraint on Fire Response of Steel Beams

Dwaikat

Kodur

2009

Fire Technol

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“…As mentioned earlier, a comparison with other fast-strain-rate test results [18][19] and the rheological model R3 is given in Figure 5(b). The damping coefficient c 1 always has a smaller value than that for c 2 when utilizing equation (10). The damping coefficient c 2 is determined using a logarithmic relation between strain rate and temperature.…”

Section: Constitutive Rheological Componentsmentioning

confidence: 99%

“…The origin of the ASCE model is uncertain [5], but the shape of the stress-strain model suggests that the test data is probably taken from constant-temperature coupon tests conducted at a fast strain rate. Various researchers have proposed other types of stress-strain model, mostly based on curve-fitting of constant-temperature and transient test data [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A unified rheological model for modelling steel behaviour in fire conditions

Torić

Burgess

2016

Journal of Constructional Steel Research

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“…Since both Young's modulus and the yield strength are degraded at high temperature, the definition of the stressstrain relation of steel according to elevated temperature is necessary to reflect this degradation in material properties, and many related experimental and analytical researches have been performed (BSI, 2004;Lie, 1992;Poh, 2001). Among these, the stress-strain relationship of steel presented in EN 1992-1-2 (BSI, 2004) is used in this paper because this material model represents a flexible stress-strain relationship that can effectively include the creep effect at elevated temperature as a result of being determined from a transient test considering a steady change of temperature (Kwak and Kim, 2002).…”

mentioning

confidence: 99%

Fire-resistant capacity of RC structures considering time-dependent creep strain at elevated temperature

Hwang¹,

Kwak²,

Hwang³

et al. 2016

Magazine of Concrete Research

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This paper introduces a numerical evaluation of the fire-resistant capacity of reinforced concrete structures. On the basis of a time-dependent temperature distribution across a section determined from a transient heat transfer analysis considering heat conduction, convection and radiation, a layered fibre section method is adopted to take into account the non-linear material properties depending on the temperature. Furthermore, non-mechanical strains of concrete and steel such as thermal strain, transient strain and creep strain, which increase with elevated temperature variation induced by fire, are implemented into the formulation. Numerical results for structural members are compared with experimental data obtained from standard fire tests to investigate the influence of nonmechanical strains at elevated temperature. Beyond the member level, frame structures exposed to fire are also analysed to evaluate the influence of fire on statically indeterminate structures exposed to practical fire conditions. Finally, consideration of the change in material properties induced by elevated temperature in design practice is emphasised through correlation studies between the resisting capacities evaluated by the introduced numerical algorithm and those determined by the design code EN 1992-1-2.

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Stress-Strain-Temperature Relationship for Structural Steel

Cited by 90 publications

References 7 publications

Effect of Location of Restraint on Fire Response of Steel Beams

Effect of Location of Restraint on Fire Response of Steel Beams

A unified rheological model for modelling steel behaviour in fire conditions

Fire-resistant capacity of RC structures considering time-dependent creep strain at elevated temperature

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