Behaviour and design of restrained steel column in fire, Part 1: Fire test

Li, Guo Qiang; Wang, Peijun; Wang, Yongchang

doi:10.1016/j.jcsr.2010.03.017

Cited by 52 publications

(14 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison of the results was presented in one previous paper of the authors [4]. For conciseness, here only present the comparison between the analysis results and the column test results in [12], See Fig. 5.…”

Section: Validation Of Numerical Modelmentioning

confidence: 97%

“…To validate the numerical model of this paper, one column test [12], two steel frame tests [22] and one theoretical model of catenary behaviour of beams [23] were analysed, using the analysis method adopted in this paper. Good agreements are obtained.…”

Section: Validation Of Numerical Modelmentioning

confidence: 99%

“…Tan et al [10,11] studied the behaviour of axially restrained columns and the effects of load eccentricity, boundary friction and steel material models on structural responses. Li et al [12,13] conducted two experiments to study the behaviour of axially and rotationally restrained steel columns under fire and investigated the effects of axial restraint stiffness, axial load, bending moment load and column slenderness on the buckling temperatures and critical temperatures of axially restrained columns under fire through quasi-static parametric numerical analysis. Shepherd and Burgess [14] explained the snap-back behaviour of columns which may occur when the temperature decreases after buckling.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic performance of axially and rotationally restrained steel columns under fire

Jiang

Izzuddin

2016

Journal of Constructional Steel Research

Self Cite

View full text Add to dashboard Cite

Section: Validation Of Numerical Modelmentioning

confidence: 97%

Section: Validation Of Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic performance of axially and rotationally restrained steel columns under fire

Jiang

Izzuddin

2016

Journal of Constructional Steel Research

Self Cite

View full text Add to dashboard Cite

“…An experimental study to investigate the failure time of unprotected steel columns subjected to axial restraint at elevated temperature has been carried out by Tan et al [3]. Li et al [4] performed two fire tests on axially and rotationally restrained steel columns that have different axial restraint stiffness. On the other hand, the restraints that affect the stability of steel columns at elevated temperature were widely investigated by several researchers [5][6][7] with theoretical derivations.…”

Section: Introductionmentioning

confidence: 99%

“…In reality, thermal gradient attributed to the different fire exposed conditions in columns experiencing elevated temperature might affect the buckling strength of steel frames subject to fire. However, similar to the investigations carried out by other researchers [4,7,10,13], the assumption of uniform temperature along the cross section of the members was adopted in this study for the reason of simplicity. In addition, the connection stiffness is assumed to remain constant at elevated temperature and the thermal expansion of beam at elevated temperature is neglected.…”

Section: Introductionmentioning

confidence: 99%

Storey-based stability of unbraced steel frames at elevated temperature

Zhuang

2012

Journal of Constructional Steel Research

View full text Add to dashboard Cite

Collapse analysis of regular and irregular tall steel moment frames under fire loading

Heshmati

Aghakouchak

2019

Structural Design Tall Build

View full text Add to dashboard Cite

This study is carried out to evaluate the progressive collapse of steel buildings under fire event. To this end, a 15-story steel structure with moment-resisting system and composite floors is considered. The effects of various parameters such as beam section size, gravity load ratio, vertical irregularity of resisting system, and location of fire compartments on collapse modes are investigated numerically. Different temperature-time curves are defined across the composite floors according to the Eurocode 4. It is found that local collapse of the frames at the ground floor fire is triggered by the buckling of the interior heated columns at approximately 540°C. The redistributed loads by floors delay the global collapse at least 45 min. Increasing gravity loads accelerates the global collapse of the frames significantly. The heated columns of the middle floor buckle at higher temperature compared to the ground floor heated columns and no global collapse occur due to this scenario. In general, the potential of collapse of the regular and irregular frame due to fire in the edge bay is higher compared to the fire in the middle bay. It is also found that the local and global collapse of regular frames occur earlier than irregular frames. KEYWORDS collapse mode, column buckling, concrete slab, progressive collapse, tall steel frame, vertical irregularity 1 | INTRODUCTION The fire-induced collapse of real tall steel buildings such as the World Trade Centre (WTC) Towers in New York (2001), Windsor Tower in Madrid (2005), and the Plasco building in Tehran (2017) provided important information about the stability and progressive collapse of high-rise buildings during fire events. The progressive collapse of structures is defined as "the spread of an initial local failure from element to element, resulting eventually in the collapse of an entire structure or a disproportionately large part of it". [1] The level of damage to the buildings due to fire can be extensive and is dependent on various factors such as material properties, intensity and duration of fire, and also external factors such as wind conditions, firefighting operation, and building height. While steel materials have been widely used in many tall structures, temperature sensitivity of steel material is a major disadvantage, since the mechanical properties of steel deteriorate significantly at high temperatures. According to Eurocode 3, [2] the yield stress of steel remains unchanged up to 400°C. But at 700°C and 900°C, it reduces to 23% and 6% of ambient temperature yield stress, respectively. Also the yield stress and modulus of elasticity of steel material reach almost zero at 1,200°C.Fire and heat in buildings cause changes in the geometry (thermal expansion) and material properties (reduction of stiffness and strength) of structural members. In the frame structures in early stages of fire, the thermal expansion effects are crucial, and then, if further increase in temperature occurs, the reduction of stiffness and strength of materials will be more import...

show abstract

Behaviour and design of restrained steel column in fire, Part 1: Fire test

Cited by 52 publications

References 12 publications

Dynamic performance of axially and rotationally restrained steel columns under fire

Dynamic performance of axially and rotationally restrained steel columns under fire

Storey-based stability of unbraced steel frames at elevated temperature

Collapse analysis of regular and irregular tall steel moment frames under fire loading

Contact Info

Product

Resources

About