Progressive collapse assessment of framed reinforced concrete structures according to UFC guidelines for alternative path method

Helmy, Huda; Salem, Hamed; Mourad, Sherif A.

doi:10.1016/j.engstruct.2012.03.058

Cited by 58 publications

(30 citation statements)

References 5 publications

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“…Such modeling approach proves to a good alternative to a complex fracture mechanics based approach. AEM analysis is effectively applied in the progressive collapse analysis of various types of buildings including high rise RC, steel and masonry structures due to its capability in nonlinear and large deformation scenario [16,17]. The method has also been successfully implemented for collapse analysis of bridges also [18].…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Non-linear Analysis Reinforced Concrete Flexure Members Using Elements with Axial – Shear Coupling

2017

IJCRR

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Abstract:This paper explains the formulation of Applied Element Method (AEM) as applied to plain and reinforced concrete beams as two-dimensional structures by primarily implementing material nonlinearity. Both concrete and steel reinforcement have non-linear stress-strain curve in the model. A multi linear curve is assumed for reinforcement and concrete is modeled as a progressively fracturing solid. Static linear analysis of a reinforced beam using this method was compared with finite element and coupled boundary element method solutions. Static non-linear analysis of plain concrete beam using this method was compared with results of fracture mechanics model and published experimental results. The results were in good agreement with established analysis methods and experimental data. Advantages of AEM which is simple and straightforward in the modeling of reinforced concrete members are also discussed.

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Section: Conclusion and Discussionmentioning

confidence: 99%

“…The details are presented below. The problem selected was from the work by Ameen and Prasad [16]. They analyzed a singly reinforced concrete beam by way of coupling FEM and BEM (Boundary Element Method), the method was termed "FEBEM", a coupled Finite Element and Boundary Element Method.…”

Section: Static Linear Analysis Of Rcc Beammentioning

confidence: 99%

Non-linear Analysis Reinforced Concrete Flexure Members Using Elements with Axial – Shear Coupling

2017

IJCRR

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“…Although the recommended tie force(TF) method takes into account the catenary mechanism to describe the progressive collapse demand [3], it neglects the contributions of the membrane action of composite floor slabs at large deformations, which leads to the APM over-conservative and lack of sufficient theory and test data supporting. Nonlinear incremental dynamic analysis also known as the "nonlinear dynamic Pushdown analysis" [17], is usually a promising method for estimating the progressive collapse-resistant capacity, which is time-consuming and requires repeated computational calculations to evaluate the structural progressive collapse-resistant dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

“…It is a complex subject to evaluate the progressive collapse-resistant capacity of structures under different progressive collapse conditions. The alternative path method (APM) is most widely used to analyze the building structures subject to postulate scenarios of initial local structural damages and the load-displacement curves are used to evaluate the progressive collapse-resistant behavior of structures under progressive collapse conditions [2,3]. Izzudin et al [4] and Vlassis et al [5] proposed a framework for a simplified progressive collapse-resistant evaluation of multi-storey buildings, which is evaluated from three aspects: static response, dynamic response and ductility performance.…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Assessment of the Steel Moment-frame with Composite Floor Slabs Based on Membrane Action and Energy Equilibrium

Shi¹,

Wang²,

Dong³

2017

TOBCTJ

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Background and Objective:Progressive collapse resistance of the steel moment-frame with composite floor slabs can be assessed by sudden column loss scenarios. In order to investigate the progressive collapse-resistant capacity of the steel moment-frame with composite floor slabs, a simplified approach based on the theory of membrane action and energy equilibrium principle is presented, which assessed the behaviour of progressive collapse resistance of this frame subjected to the removal of a penultimate column via the static and dynamic analysis. Mateial and Method:The residual vertical bearing capacity model considering of the membrane action and tie force (TF) method of composite floor slabs is developed to evaluate the force mechanism of the composite floor slabs. An energy-based theoretical framework is proposed for calculating the maximum allowable dynamic demands based on the nonlinear static Pulldown analysis, which is used to explore the relationship between of dynamic and static response in the progressive collapse process. Furthermore, the finite element software SAP2000 is used to calculate the numerical example to verify the reliability of this simplified approach. Results:The results show that the composite floor slabs significantly improve the structural progressive collapse-resistant ability and this simplified approach evaluates the progressive collapse resistance of the whole structure effectively. Conclusion:The existence of the floor can increase the ductility of the structure, and increase the progressive collapse-resistant ability. The appropriate value of the DIF depends on the ductility and amount of inelastic action the structure would experience during the column removal scenario.

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“…Therefore, in the current study, the numerical analysis was carried out using the Applied Element Method. The Applied Element Method is based on discrete crack approach and is capable of following the structure's behavior to its total collapse Meguro and Tagel-Din 2001;Tagel-Din 2002;Meguro and Tagel-Din 2003;Tagel-Din and Rahman 2004;Galal and ElSawy 2010;Sasani and Asgitoglu 2008;Salem et al 2011;Park et al 2009;Helmy et al 2009;Helmy et al 2012;Helmy et al 2013;Sasani 2008;Wibowo 2009;Salem 2011;Salem and Helmy 2014) …”

Section: Introductionmentioning

confidence: 99%

Collapse Analysis of Utatsu Ohashi Bridge Damaged by Tohuku Tsunami using Applied Element Method

Salem

Mohssen²,

Kosa

et al. 2014

ACT

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The 2011 Tohuku tsunami on the east coast of Japan resulted in killing more than 15,000 people and missing more than 2,500 people, washing away of more than 250 coastal bridges and loss of US$235 billion. Collapse of coastal bridges due to tsunami impact represents a huge obstacle for rescue works. Therefore, in the current study, the collapse of Utatsu Ohashi bridge is numerically studied. The analysis is carried out using the Applied element Method due to its advantages of simulating structural progressive collapse. The AEM is a discrete crack approach, in which elements can be separated, fall and collide to other elements in a fully nonlinear dynamic scheme of computations. The Utatsu Ohashi bridge collapse was successfully simulated using AEM. It was numerically found that the amount of trapped air between deck girders during tsunami had a significant effect on the behavior of the bridge. This is attributed to the buoyant force accompanied with the trapped air. A simplified method for estimating trapped air was assumed and proved to give reasonable results compared to reality. Three different solution examples for mitigating collapse of similar existing bridges were introduced and applied to Utatsu Ohashi bridge case and found to be efficient for preventing collapse.

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Progressive collapse assessment of framed reinforced concrete structures according to UFC guidelines for alternative path method

Cited by 58 publications

References 5 publications

Non-linear Analysis Reinforced Concrete Flexure Members Using Elements with Axial – Shear Coupling

Non-linear Analysis Reinforced Concrete Flexure Members Using Elements with Axial – Shear Coupling

Progressive Collapse Assessment of the Steel Moment-frame with Composite Floor Slabs Based on Membrane Action and Energy Equilibrium

Collapse Analysis of Utatsu Ohashi Bridge Damaged by Tohuku Tsunami using Applied Element Method

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