A new perspective on the effects of abrupt column removal

Pujol, Santiago; Smith-Pardo, J. Paul

doi:10.1016/j.engstruct.2008.11.022

Cited by 19 publications

(9 citation statements)

References 2 publications

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“…To end this, based on the energy analysis for a SDOF system, Pujol el al. [75] established a simple relationship between the yield state and the ultimate collapse state of structures by which the progressive collapse demand could be rapidly calculated. Li and his co-workers [76,77] established a theoretical framework for analyzing the resistance demand.…”

Section: Calculation For Progressive Collapse Resistance Demandmentioning

confidence: 99%

A Review on Progressive Collapse of Building Structures

Wang¹,

Zhang²,

Li³

et al. 2014

TOCIEJ

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Progressive collapse of building structures is generally triggered by a local failure due to accidental actions, followed by subsequent chain effect of the structures which may result in wide range failure or even collapse of the entire buildings. Since the “911” event, progressive collapse of building structures has been widely concerned by engineers and researchers. This paper assesses the current researches on this issue from experimental study, numerical simulation and theoretical analysis. Given the limitation of costs and difficulties of experimental tests, the experimental studies investigate the collapse mechanism, such as development of stress/strain and damage/failure of materials, mainly via the scaled down specimens of structural components and substructures. On the other hand, the collapse behavior of entire building structures is analyzed via the numerical methods, such as the finite element method and the discrete element method. Further, the collapse resistance demand and the robustness assessment for building structures are theoretically studied in depth in which the simplified theoretical models of the collapse-resisting demand and the collapse risk assessment are proposed respectively. At last, the design method to prevent progressive collapse for building structures is also discussed.

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Section: Calculation For Progressive Collapse Resistance Demandmentioning

confidence: 99%

A Review on Progressive Collapse of Building Structures

Wang¹,

Zhang²,

Li³

et al. 2014

TOCIEJ

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“…Researchers adopt different design approaches in modelling the sudden column loss for progressive collapse evaluation, which is often dictated by the assumptions for sudden column loss. Therefore, incorrect assumptions for modelling sudden column loss for progressive collapse assessment could mislead design engineers as observed by and Pujol and Paul Smith-Pardo (2009). This paper investigates the length of column removal time on structural response and compared commonly used assumptions for performing column removal analysis for progressive collapse assessment.…”

Section: Introductionmentioning

confidence: 99%

An evaluation of modelling approaches and column removal time on progressive collapse of building

Stephen

Lam

Forth

et al. 2019

Journal of Constructional Steel Research

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Over the last few decades, progressive collapse disasters have drawn the attention of codified bodies around the globe; as a consequence, there has been a renewed research interest. Structural engineering systems are prone to progressive collapse when subjected to abnormal loads beyond the ultimate capacity of critical structural members. Sudden loss of critical structural members triggers failure mechanisms which may result in a total or partial collapse of the structure proportionate or disproportionate to the triggering event. Currently, researchers adopt different modelling techniques to simulate the loss of critical load bearing members for progressive collapse assessment. GSA guidelines recommend a column removal time less than a tenth of the period of the structure in the vertical vibration mode. Consequently, this recommendation allows a wide range of column removal time which produces inconsistent results satisfying GSA recommendation. A choice of a load time history function assumed for gravity and the internal column force interaction affects the response of the structure. This paper compares different alternative numerical approaches to simulate the sudden column removal in frame buildings and to investigate the effect of rising time on the structural response.

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“…Based on this concept, the progressive collapse resistance demand under the beam mechanism has been studied in the past, using the dynamic method 17 and the energy method. [18][19][20] However, little research has been devoted to the demand evaluation under the catenary mechanism for RC frame structures.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the aforementioned research gap, another critical problem associated with the existing energy-based approaches is the energy distribution in different structural components. [18][19][20] In these approaches, the single-degree-offreedom (SDOF) model is widely adopted to represent the mechanical characteristics, including collapse resistance and deformation, of the collapse-resisting substructures, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, the DAF for the structural resistance is different from that for the elemental resistance. The DAF [18][19][20] for the beam mechanism obtained based on the SDOF model is the structural-level DAF, DAF s . However, in engineering designs the elemental-level DAF, DAF e , is required to determine the resistance demand of the structural elements.…”

Section: Introductionmentioning

confidence: 99%

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Progressive Collapse Resistance Demand of RC Frames under Catenary Mechanism

Li¹,

Lu²,

Guan³

et al. 2014

ACI Structural Journal

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Progressive collapses are resisted by the catenary mechanism in reinforced concrete (RC) frame structures undergoing large deformations. Research to date has mainly focused on the nonlinear dynamic progressive collapse resistance demand of this type of structures under the beam mechanism (that is, for small deformations), and that the catenary mechanism is lacking. As a first attempt, this study establishes a dynamic amplification factor for evaluating the resistance demands of RC frames under the catenary mechanism. To achieve this, an energy-based, theoretical framework is proposed for calculating the aforementioned demands. Based on this framework, the analytical solution for the collapse resistance demands of regular RC frames under the catenary mechanism is readily obtained. Numerical validation indicates that the proposed equations can accurately describe the progressive collapse demand of RC frames undergoing large deformations.

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A new perspective on the effects of abrupt column removal

Cited by 19 publications

References 2 publications

A Review on Progressive Collapse of Building Structures

A Review on Progressive Collapse of Building Structures

An evaluation of modelling approaches and column removal time on progressive collapse of building

Progressive Collapse Resistance Demand of RC Frames under Catenary Mechanism

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