Progressive collapse analysis of steel frame structure based on the energy principle

Chen, Chang Hong; Zhu, Yan Fei; Yao, Yao; Huang, Ying

doi:10.12989/scs.2016.21.3.553

Cited by 11 publications

(2 citation statements)

References 15 publications

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“…Most of papers about progressive collapse assessment published in the latest years were concerned with steel structures (Chen et al 2016;Kim and Park 2008;Kim et al 2009Kim et al , 2011Ferraioli et al 2014Ferraioli et al , 2018a, whereas less contributions devoted to reinforced concrete structures are present in literature (Sasani and Sagiroglu 2008;Ferraioli et al 2012;Ferraioli 2019a). Even though accurate analyses based on finite-element models have shown in general good simulation capabilities (Keyvani et al 2014), the validity of these complex models has not been checked for large structural systems, yet.…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Retrofit of a RC Hospital Building Using Steel Braces

Ferraioli

Lavino

Mandara

2021

Lecture Notes in Civil Engineering

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The progressive collapse retrofit of a RC hospital building making use of steel braces is described in the paper. The vulnerability of the construction when subjected to specific threat scenarios is preliminary analysed by removing critical column and applying the alternate load path method to evaluate the capability of the damaged structure to bridge across the removed column. A detailed threedimensional model of the building has been created to carry out both nonlinear static and nonlinear dynamic analyses. Both geometrical and material nonlinearities have been considered in the analysis in order to account for the inelastic behaviour following the sudden column removal and the possible subsequent catenary effects. In order to retrofit the building against progressive collapse the use of steel braces in some bays has been proposed, designed on the basis on simple equilibrium conditions under vertical loads. The retrofitting bracing system proved to be effective in improving the global building behaviour under several accidental scenarios.

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Section: Introductionmentioning

confidence: 99%

Progressive Collapse Retrofit of a RC Hospital Building Using Steel Braces

Ferraioli

Lavino

Mandara

2021

Lecture Notes in Civil Engineering

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“…В современной научной литературе уделяется большое внимание разработке методического обеспечения для выполнения расчетов такого типа [1,2]. В работах [3][4][5][6][7][8][9][10][11][12] рассматриваются алгоритмы оценки динамических догружений стальных и железобетонных конструкций при возможных локальных повреждениях на основе квазистатических подходов. В ряде публикаций [13][14][15][16][17][18][19] выполняются исследования деформаций строительных объектов при аварийных ситуациях в динамической постановке.…”

Section: Introductionunclassified

Simulation of Deformations of Pre-Stressed Steel Trusses in Emergency Situations

Serpik

Тарасова

2021

Proceedings of the SWSU

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Purpose of research is to make methodology and algorithm for finite element modeling in a single computational scheme of deformation of flat steel trusses, previously stressed using high-strength ropes, in accordance with the chronology of impacts on the object in the form of prestresses, normative loads and emergency destruction of one of the bearing elements.Methods. The solution of the problem is carried out in geometrically nonlinear staging using numerical integration based on Newmark approach with the construction of equilibrium equations of the finite element model of the structure in a deformed state at each integration step. Structural nonlinearity related to structural restructuring and consideration of ropes operation for tension only is described. The application of gravity forces of the carrier system, sequential introduction of tightening and their prestress, the application of payload and emergency impact in the form of instantaneous local destruction are traced. Before failure occurs, static loading condition is simulated using dynamic relaxation method. Methodology of accounting within numerical integration of emergency impact is formulated by application of dummy forces, values of which are calculated in excluded structural element before its destruction.Results. Performance of presented computational procedure is illustrated by the example of a flat steel truss calculation with a span (54 m), including two ropes. Object behavior is considered considering the break of one of the ropes subjected to preliminary stress. It was revealed that the investigated emergency does not lead to the destruction of the second rope and the occurrence of plastic deformations in the truss rods.Conclusion: Completed developments can be used to ensure the survivability of pre-stressed steel trusses under beyond design basis effects, leading to the destruction of individual structural elements.

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