Identification of progressive collapse pushover based on a kinetic energy criterion

Menchel, Kfir; Massart, Thierry; Bouillard, Ph.

doi:10.12989/sem.2011.39.3.427

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…The energy-based concept was also used to develop analytical expressions for the DIFs (Tsai 2010) and a performance-based retrofit design approach for regular building frames . Also, Menchel et al (2011) proposed a methodology to identify the static pushover procedure for sudden column removal by using a similar energy criterion. Fang et al (2013) used the energy-based concept to evaluate the robustness of steel-composite car parks under vehicle fire.…”

Section: Introductionmentioning

confidence: 99%

Application of the work-energy principle to assess the risetime effect on the dynamic response amplification under column loss

Tsai¹

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Progressive collapse analysis of building structures is usually performed under sudden column loss conditions. This means that the bearing capacity of the targeted column disappeared instantaneously. Hence, a time length less than one tenth of the natural period in the gravitational direction of the damaged structure has been recommended for disabling the targeted column in the numerical analysis. The time length required for disabling the postulated column in dynamic progressive analysis is defined as the rise time. Most seismically designed structural members may have a minimum ductility capacity as regulated in design codes. When the column is subjected to a devastating abnormal loading, it may gradually lose its load-carrying ability with increased deflection. Thus, the column strength is completely lost within a finite rise time. In other words, the dynamic loading for progressive collapse analysis of the remaining structure is increased gradually rather than instantaneously. This study intends to apply the work-energy principle to investigating the rime-time effect on the dynamic response amplification under column loss. A single-degree-of-freedom (SDOF) model is used to derive the analytical formulation with consideration of the rise-time effect. It is constructed with an assumption that the maximum imposed loading can be attained before yielding. Analytical procedures for calculate the force-and displacement-based dynamic increase factors (DIFs) are proposed. Nonlinear time-history analyses are then carried out to evaluate the accuracy of the proposed approach. The analysis results indicate that the dynamic amplification will decrease with increased finite rise time. The rise-time effect decreases with increased plastic demand. For practical application, the rise-time effect may be reasonably neglected as the ductility demand is larger than 5.0 and the normalized loading is larger than 1.5 for the force-and displacementbased DIFs, respectively. Its influence on the column-loss response may vary with the ratio of the rise-time length to the natural period and the extent of plastic deformation.

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Section: Introductionmentioning

confidence: 99%

Application of the work-energy principle to assess the risetime effect on the dynamic response amplification under column loss

Tsai¹

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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An Approximate Analytical Formulation for the Rise-Time Effect on Dynamic Structural Response Under Column Loss

Tsai

2018

Int. J. Str. Stab. Dyn.

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Dynamic progressive collapse analysis of building structures is usually conducted under sudden column loss conditions. The time length required for disabling the failed column is defined as the rise time. The rise-time effect on the maximum dynamic response of building frames under column loss is investigated in this study. Based on the work-energy principle, an approximate analytical formulation for the maximum dynamic response is derived considering the rise-time effect. The force- and displacement-based dynamic increase factors (DIFs) of a single degree-of-freedom model and a clamped steel beam are used to assess the accuracy and validity of the proposed formulation. Analysis results indicate that the DIFs decrease with increased rise time. Also, the rise-time effect decreases with increased ductility demand. Practical application of the analytical formulation to regular building frames subjected to column loss is illustrated. Primary factors related to the extent of the rise-time effect on the column-loss response are identified for design consideration.

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Collapse behaviour in reciprocal frame structures

Garavaglia¹,

Pizzigoni²,

Sgambi³

et al. 2013

Structural Engineering and Mechanics

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Identification of progressive collapse pushover based on a kinetic energy criterion

Cited by 4 publications

References 29 publications

Application of the work-energy principle to assess the risetime effect on the dynamic response amplification under column loss

Application of the work-energy principle to assess the risetime effect on the dynamic response amplification under column loss

An Approximate Analytical Formulation for the Rise-Time Effect on Dynamic Structural Response Under Column Loss

Collapse behaviour in reciprocal frame structures

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