Simulations on progressive collapse resistance of steel moment frames under localized fire

Jiang, Binhui; Li, Guoqiang; Li, Liulian; Izzuddin, B.A.

doi:10.1016/j.jcsr.2017.05.018

Cited by 44 publications

(15 citation statements)

References 17 publications

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“…Experimental work previously carried out by Jiang et al (2017a) forms the next case-study. This experiment was also subsequently analysed numerically by Jiang et al (2017b). These works provided data on the post-buckling of heated columns during the cooling stage and also on the subsequent progressive collapse behaviour of the frame.…”

Section: Numerical Model and Validation Studiesmentioning

confidence: 99%

“…applied load/load capacity) can improve the robustness of steel frames in a fire. Jiang et al (2017b) investigated the influence of dynamic effects caused by buckling of columns on the progressive collapse resistance of a steel frame. The results showed that the effect of the damping ratio is negligible on the progressive collapse analysis.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the robustness of a steel frame structure with composite floors subject to multiple fire scenarios

Suwondo

Cunningham

Gillie

et al. 2021

Advances in Structural Engineering

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This study presents robustness analyses of a three-dimensional multi-storey composite steel structure under the action of multiple fire scenarios. The main objective of the work is to improve current understanding of the collapse resistance of this type of building under different fire situations. A finite element approach was adopted with the model being firstly validated against previous studies available in the literature. The modelling approach was then used to investigate the collapse resistance of the structure for the various fire scenarios examined. Different sizes of fire compartment are considered in this study, starting from one bay, three bays and lastly the whole ground floor as the fire compartment. The investigation allows a fundamental understanding of load redistribution paths and member interactions when local failure occurs. It is concluded that the robustness of the focussed building in a fire is considerably affected by the size of fire compartments as well as fire location. The subject building can resist progressive collapse when the fire occurs only in the one-bay compartment. On the other hand, total collapse occurs when fire is located in the edge three-bay case. This shows that more than one fire scenario needs to be taken into consideration to ensure that a structure of this type can survive from collapse in the worst-case situation.

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Section: Numerical Model and Validation Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the robustness of a steel frame structure with composite floors subject to multiple fire scenarios

Suwondo

Cunningham

Gillie

et al. 2021

Advances in Structural Engineering

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show abstract

“…Geometrical and material nonlinearities were considered, and the strain rate effects of material were considered. The Cowper–Symonds model was adopted to consider the strain rate effect on the yield strength of steel, and the values of the parameters in the Cowper–Symonds model were adopted according to the suggestion of the research literature . The substructure was loaded so that the inertial axial force of the column at ambient temperature is the same with that of the column in the frame.…”

Section: Robustness Assessment Of the Reference Steel Framementioning

confidence: 99%

“…Collapse of the Word Trade Center (WTC) towers in the United States in 2001 emphasizes the importance of collapse resistance of building structures under fire since research studies show that it is the fire after the airplane impact that cause the collapse of the buildings . Following this incident, a lot of research has been conducted on the progressive collapse resistance of steel building structures under localized fire, including numerical analyses and experimental studies . Efforts have also been made by researchers to develop robustness assessment methods of buildings under localized fire.…”

Section: Introductionmentioning

confidence: 99%

Robustness assessment of planar steel frames caused by failure of a side column under localized fire

Jiang

Wang

Shen

et al. 2020

Structural Design Tall Build

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Summary Progressive collapse of a building structure under fire is a disaster that may cause heavy casualties and serious economic loss. However, there is a lack of codified method to assess fire‐induced progressive collapse of building structures. A global–local analysis method (GLAM) has recently been proposed by the authors and their colleagues to assess progressive collapse of steel buildings under localized fire, and its application on fire scenarios that causes one inner column to fail has been verified. This paper extends the application of GLAM to fire scenarios that causes a side column to fail in a planar steel frame. The predictions of the GLAM were validated against the results obtained from nonlinear dynamic analysis of the whole frame model. Besides, effects of location of the heated column at different storeys and load level of the frame were also studied. The results show that GLAM gives the same collapse predictions to the case studies with detailed nonlinear dynamic analysis. The differences between the critical load obtained from GLAM and that provided by the nonlinear dynamic analysis is within 7%. Therefore, GLAM has good applicability on robustness assessment of planar steel frames caused by failure of a side column under localized fire.

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“…As shown in Figure , the stress–strain relationship of rebar was assumed to be bilinear with yield stress of 452 MPa, tensile strength of 677 MPa, and limit strain of 0.15. Note that the experimental tensile strength of rebar has been transferred to its true value based on the following relationship:

σ_{true} = σ_{exp e} ((), 1 + ε_{\lim}) .

…”

Section: Load‐bearing Capacity Of Rc Flat‐plate Framed Structuresmentioning

confidence: 99%

Theoretical investigations on load‐bearing capacity of RC flat‐plate framed structures subject to middle column loss

Zhang

Wang

et al. 2017

Structural Design Tall Build

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Summary This paper presents theoretical studies on load‐bearing capacity of reinforced concrete flat‐plate framed structures. The existing methods for determining load‐bearing capacity of simply supported slabs are first reviewed, and their limitations are presented. An energy‐based refined method is then proposed to enhance the accuracy of the existing methods by considering the contributions to internal energy dissipation due to the extension of reinforcing bars along yield lines, the additional resultant bending moment from membrane forces, and the sectional bending moment along yield lines of slabs. The refined method for simply supported slabs is extended for fixed supported slabs, and thus, the load‐bearing capacity of reinforced concrete flat‐plate structures subject to a middle column loss is analytically determined. The performance of the proposed method is validated against test results and also verified against finite element analyses. Parametric studies are conducted to investigate the effect of reinforcement ratio, slab thickness and aspect ratio on the stiffness, and yield‐line resistance of structures. It is found that for the fixed supported slabs, it is reasonable to assume negative yield lines along the slab edges to consider the effect of obvious concrete crushing along the edge. Square slabs have higher ultimate loads than rectangular slabs, due to a longer horizontal yield line in the middle in the rectangular slab, which has detrimental effect on the sectional ultimate bending moment. The numerical results show that the reinforcement ratio has little effect on the initial bending stiffness and yield‐line resistance of slabs for a given slab thickness and aspect ratio. The initial stiffness and yield‐line resistance increase as the slab thickness increases. For the same reinforcement ratio and slab thickness, a larger aspect ratio leads to a lower initial bending stiffness, yield‐line resistance, and stiffness in tensile membrane action stage, due to a longer yield line along which tensile membrane forces have a detrimental effect on the sectional bending moment.

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Simulations on progressive collapse resistance of steel moment frames under localized fire

Cited by 44 publications

References 17 publications

Analysis of the robustness of a steel frame structure with composite floors subject to multiple fire scenarios

Analysis of the robustness of a steel frame structure with composite floors subject to multiple fire scenarios

Robustness assessment of planar steel frames caused by failure of a side column under localized fire

Theoretical investigations on load‐bearing capacity of RC flat‐plate framed structures subject to middle column loss

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