Load-resisting mechanisms of 3D composite floor systems under internal column-removal scenario

Fu, Qiuni; Tan, Kang Hai; Zhou, Xu; Yang, Bo

doi:10.1016/j.engstruct.2017.06.070

Cited by 50 publications

(11 citation statements)

References 19 publications

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“…Fu, Tan [8] experimentallly studied loadresisting mechanisms of 3D composite floor systems under an internal column-removal scenario. Fu, Tan [9] experimenally revealed the effects of slab aspect ratio, degree of compoiste action and boundary condition on the behaviour of compoiste floor systems subjected to an internal column removal scenario.…”

Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

Numerical study on steel-concrete composite floor systems under corner column removal scenario

Tan

2019

Structures

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This paper evaluates the robustness of steel-concrete composite floor systems subjected to Corner Column (CC) removal scenario based on numerical simulations. Firstly, a FE model is statically analysed subjected to a CC removal scenario, yielding the static loaddisplacement curve, the failure mode and load-transfer mechanisms. These results are compared with those of composite floor systems under an Internal Column (IC) removal scenario. Besides, the FE model was dynamically analysed by six times under the respective six levels of loads by suddenly removing the corner column. The dynamic displacement-time responses under all levels of loads were obtained. Six pairs of load versus peak displacement constitute the pseudo-static response, to assess the loadcarrying capacity and ductility of this composite floor system subjected to a sudden corner-column-removal scenario. Lastly, dynamic increase factors (DIFs) are obtained through comparing the quasi-static and pseudo-static responses, which is further compared with DIF under IC scenario.

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Section: Universitat Politècnica De Valènciamentioning

confidence: 99%

Numerical study on steel-concrete composite floor systems under corner column removal scenario

Tan

2019

Structures

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“…It is noted that the simplified model [16] does consider the effect of axial restraint provided by the neighbouring structural elements at both end of the double-span beam. The axial stiffness provided by these neighbouring structural elements is essential in developing the tensile catenary action at large deformation [32][33][34][35]. However, under the edge column-removal case, the axial restraint is present only at one end of the double-span beam.…”

Section: Collapse Spectrummentioning

confidence: 99%

“…Apart from that, the steel wire must be securely fixed to the edge of the collapsed bay in order to maintain the tensile response of the slab. The fixity of the wire mesh to the edge of the collapsed bay is governed by the shear resistance provided by the shear studs [28,32,34,36], the bond strength between the steel P u = ∑ ƒ u max R (u) du (3) wire and concrete [39], and the continuity of the steel wire o max i 0 i…”

Section: Energy-based Nonlinear Static Progressive Collapse Analysis mentioning

confidence: 99%

“…It is said that the slab enhances the flexural capacity of the composite beam in the elastic stage and subsequently permits the compression arching action to progress. Second, it redistributes the load at high deformation state via tensile membrane action, which is developed within the reinforcement bars (or the welded steel wire mesh) and the metal deck [34,38]. These actions can be mobilised only if there is sufficient shear resistance between the concrete slab and the steel beam in order to maintain the composite behaviour [28,32,34,36].…”

Section: Energy-based Nonlinear Static Progressive Collapse Analysis mentioning

confidence: 99%

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Progressive Collapse Assessment: A review of the current energy-based Alternate Load Path (ALP) method

et al. 2019

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The Alternate Load Path (ALP) is a useful method that has generated a considerable recent research interest for the assessment of progressive collapse. The outcome of the ALP analysis can be assessed either using the force-based approach or the energy-based approach. The Unified Facilities Criteria (UFC- 4- 023-03) of progressive collapse guideline - have outlined that the force-based approach can either be analysed using static or dynamic analysis. The force-based approach using static analysis is preferable as it does not require a high level of skill and experience to operate the software plus no effort is required in scrutinising the validity of the analysis results output. However, utilising the static approach will eliminate the inertial effect in capturing the actual dynamic response of the collapsed structure. In recent years, the development of the energy-based progressive collapse assessment is attracting widespread interest from researchers in the field; as the approach can produce a similar structural response with the force-based dynamic analysis by only using static analysis. Most of the current energy-based progressive collapse assessments are developed following the requirements which are given in the progressive collapse guidelines provided by the Unified Facilities Criteria. However, little attention is given to the development of the energy-based approach using the Eurocode standards as a base guideline. This article highlights the merits of utilising the energy-based approach against the force-based approach for a collapsed structure and explains the collapse mechanism of a steel frame in the perspective of the energy concept. The state of the art of energy-based progressive collapse assessment for a structural steel frame is reviewed. The comprehensive review will include insights on the development of the energy-based method, assumptions, limitations, acceptance criterion and its applicability with the European standards. Finally, potential research gaps are discussed herein.

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“…Studies reported in [6,7] also investigated the behavior of structures under blast loads. However, the difficulties and risk in developing real blast tests transferred most of the research to column loss tests (or similar) under static or dynamic conditions [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the response of steel columns to close-in detonations

Dinu

Mărginean

Dubină

et al. 2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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Explosions produced in urban areas by the detonation of explosives are low-probability but high-impact events. When they occur in the immediate vicinity of buildings, the explosions can pose a high risk to the structural integrity (local/global failures) and to the occupants (risk of injury, death). Therefore, the design and the construction of the buildings should contain preventive measures to increase the robustness of the structures. The paper presents the results of recent research carried out on the safety of building structures under extreme actions. Blast tests performed on two identical 3D specimen extracted from a typical moment resisting steel frame structure, allow to calibrate the numerical models of a full scale building structural frame system and evaluate the consequences of close-in detonations on the structural elements. The data of the experimental testing, combined with the numerical modelling, allow to investigate different factors, such as dynamic factors that affect the local failure mechanism and the residual capacity of steel columns under different blast scenarios.

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Load-resisting mechanisms of 3D composite floor systems under internal column-removal scenario

Cited by 50 publications

References 19 publications

Numerical study on steel-concrete composite floor systems under corner column removal scenario

Numerical study on steel-concrete composite floor systems under corner column removal scenario

Progressive Collapse Assessment: A review of the current energy-based Alternate Load Path (ALP) method

Factors affecting the response of steel columns to close-in detonations

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