Nonlinear analysis and reliability of metallic truss structures

Benyahi, Karim; Bouafia, Youcef; Barboura, Salma; Kachi, Mohand Said

doi:10.1007/s11709-017-0458-y

Cited by 8 publications

(8 citation statements)

References 14 publications

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“…However, in recent years, a so-called semi-probabilistic theory ensures safety by introducing various partial coefficients taking T into account the limit state considered. The use of reliability methods (FORM/SORM) consists in determining the reliability index  and obtaining an approximation of the probability of failure [22]. In the space of physical variables X , the limit state function is denoted   G X and in the standard space, we denote it   H u .…”

Section: Reliability Calculation Proceduresmentioning

confidence: 99%

“…They found that the general characteristics of the reinforced concrete (RC) panels under shear are well captured by the refined RASTM, namely for the ultimate state, as well as the need to refine the model for low load conditions. The RA-STM has been refined in several works (Bernardo et al [19][20][21], Bernardo et al [22]), in order to improve the numerical efficiency as well as provide good stability of the calculation procedure of membrane elements in reinforced concrete (RC) and prestressed concrete (PC). The refined model equations are reformulated using an optimization algorithm and an appropriate stress-strain relationship for tensile concrete is implemented.…”

Section: Introductionmentioning

confidence: 99%

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Reliability assessment of the behavior of reinforced and/or prestressed concrete beams sections in shear failure

Benyahi

Kachi

Bouafia

et al. 2021

Frattura Ed Integrità Strutturale

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The object of this article is to be able to simulate the behavior of reinforced and/or prestressed concrete beam’s section in the shear loading through a model allowing the evaluation of nonlinear strains caused by shear, while taking into account the real behavior of the materials. In this approach, we are often confronted with problems of modeling uncertainties linked to some insufficiencies of the mechanical model allowing to describe the physical phenomena in a realistic way. For that, it is necessary to use a reliability model making it possible to evaluate their probability of failure, by establishing failure curves according to the different transition zones of the limit state curve of the nonlinear behavior in the shear loading up to at section failure of reinforced and/or prestressed concrete beams. In this work, we also propose a coupling of the reliability method by response surface to carry out the reliability optimization on complex mechanical models, where the mechanical and reliability models developed have been implemented on the Fortran. This allows the estimation in an efficient way of the different reliability characteristics according to each transition zone from the limit state curve to the real behavior until failure in the shear loading.

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Section: Reliability Calculation Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability assessment of the behavior of reinforced and/or prestressed concrete beams sections in shear failure

Benyahi

Kachi

Bouafia

et al. 2021

Frattura Ed Integrità Strutturale

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“…1 1,2 . Truss members mainly bear axial tension or pressure 3,4 , so as to make full use of the strength of materials to give full play to the role of materials, save materials and reduce the weight of the structure 5,6 .…”

Section: Forewordmentioning

confidence: 99%

The Phenomenon of Internal Force Hedging After Two Trusses Overlapped With A Common Chord

Xie

Xia

Xie³

et al. 2021

Preprint

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Single truss structure is widely used in various fields of life, and has been very thorough researched. But for truss system, there are still many areas to be researched and developed. In this paper, through the mechanical test of two trusses overlapping, we find a mechanical phenomenon: the "internal force" hedging effect occurs when the two trusses share chord, but not when the chords are not shared.

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“…The method uses two deterministic models; a mathematical and a numerical one, as well as Levels 1 to 3 reliability methods. Benyahi et al (2018) propose an analytical model taking into account mechanical and geometric non-linearities in the case of trusses structures. They propose a new approach to estimate the distribution laws of random variables, thus making it possible to estimate the reliability index of mechanical models by indirect coupling (response surface).…”

Section: Introductionmentioning

confidence: 99%

Effect of the capacity ratio developed at column-beam nodes and evaluation of its random degradation impact on the formation of global ruin mechanisms

Messas

Benyahi

Adjrad

et al. 2022

WJE

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Purpose The purpose of this study, is to deals with capacity design (strong column – weak beam) in reinforced concrete frames, slightly slender, which depends on the determination of a capacity ratio necessary to reach a structural plastic mechanism. To find the capacity ratio allowing to achieve a fairly ductile behavior in reinforced concrete frames, it is necessary to validate this concept by a non-linear static analysis (push-over). However, this analysis is carried out by the use of the ETABS software, and by the introduction into the beams and columns of plastic hinges according to FEMA-356 code. Design/methodology/approach This approach makes it possible to assess seismic performance, which facilitates the establishment of a system for detecting the plasticization mechanisms of structures. It is also necessary to use a probabilistic method allowing to treat the dimensioning by the identification of the most probable mechanisms and to take only those that contribute the most to the probability of global failure of the structural system. Findings In this study, three reinforced concrete frame buildings with different numbers of floors were analyzed by varying the capacity ratio of the elements. The results obtained indicate that it is strongly recommended to increase the ratio of the resistant moments of the columns on those of the beams for the Algerian seismic regulation (RPA code), knowing that the frameworks in reinforced concrete are widespread in the country. Originality/value The main interest of this paper is to criticize the resistance condition required by RPA code, which must be the subject of particular attention to reach a mechanism of favorable collapse. This study recommends, on the basis of a reliability analysis, the use of a capacity dimensioning ratio greater than or equal to two, making it possible to have a sufficiently low probability of failure to ensure a level of security for users.

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Nonlinear analysis and reliability of metallic truss structures

Cited by 8 publications

References 14 publications

Reliability assessment of the behavior of reinforced and/or prestressed concrete beams sections in shear failure

Reliability assessment of the behavior of reinforced and/or prestressed concrete beams sections in shear failure

The Phenomenon of Internal Force Hedging After Two Trusses Overlapped With A Common Chord

Effect of the capacity ratio developed at column-beam nodes and evaluation of its random degradation impact on the formation of global ruin mechanisms

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