Nonlinear Dynamic Response and Stability Analysis of a Tensegrity Bridge to Selected Cable Rupture

Kahla, Nabil Ben; Ouni, Mohamed Héchmi El; Ali, Nizar Bel Hadj; Khan, Roohul Abad

doi:10.1590/1679-78255907

Cited by 7 publications

(5 citation statements)

References 25 publications

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“…In Figure (18), the members whose removal has led to the initial instability in the structure (in red color) are seen among all the members selected for removal. In Figure (19), all the members marked in red in Figure (18) are observed among all the members of the structure. According to Figures (18) and (19), it can be said that as we approach the middle of the cask, the number of members whose removal leads to the initial instability of the structure increases.…”

Section: Numerical Resultsmentioning

confidence: 97%

“…In Figure (19), all the members marked in red in Figure (18) are observed among all the members of the structure. According to Figures (18) and (19), it can be said that as we approach the middle of the cask, the number of members whose removal leads to the initial instability of the structure increases. Figure (20) shows the displacement -time curves (obtained from nonlinear dynamic analysis) of barrel-vault due to the loss of some members of the M3 module.…”

Section: Numerical Resultsmentioning

confidence: 97%

“…Significant gains in collapse resistance of these structures under symmetric loading are obtained with strengthened critical struts or cables, depending on which collapse case dominates, but the initial stiffness is not generally influenced by these schemes. Ben Kahla et al [19] presented a non-linear dynamic analysis procedure for the investigation of the response of a tensegrity bridge to a selected sudden cable rupture. The non-linear equation of motion of the tensegrity bridge subjected to dynamic loads is discretized and integrated in time using the unconditionally stable Newmark constant-average acceleration method combined with a Newton-Raphson iterative scheme.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Critical Members in the Progressive Collapse Analysis of Two-Layer Tensegrity Barrel Vaults

Ghandi

Ahmad

2022

NMCE

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Tensegrity structures have a high degree of indeterminacy. The occurrence of initial partial failure at one point of these structures can lead to the propagation of failure throughout the structure. One of the influential factors in the propagation of initial failure is the initial starting point of failure. The first failure can occur in a member that is considered "critical member" and causes further damage to the structure, or it can occur in a member that has caused minor damage to the structure and maintained the overall stability of the structure. Identification of critical members in tensegrity barrel-vaults, due to the application of these structures in the roof covering of meeting halls, passenger terminals, industrial halls, aircraft hangars, etc., can lead to important and effective results in preventing the occurrence of progressive collapse and possible damages. Therefore, in this paper, the critical members of a two-layer tensegrity barrel-vaults consisting of square simplexes are identified by performing nonlinear dynamic analysis using Abaqus software. Abaqus software uses the Model Change settings to simulate the initial failure. The stability of the structure under the dynamic effects of failure of different members is investigated, and finally, the critical and non-critical members are introduced. It was found that the failure of members of the modules, which are closer to the center of the structure in the longitudinal direction of the barrel vault, shows more critical behavior than the members of other modules. Also, as observed in the results of analysis, members with maximum stress are not among the most critical members.

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Section: Numerical Resultsmentioning

confidence: 97%

Section: Numerical Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Identification of Critical Members in the Progressive Collapse Analysis of Two-Layer Tensegrity Barrel Vaults

Ghandi

Ahmad

2022

NMCE

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“…However, while they discussed the active deformation behavior, local soft modes that arise in such structures are not considered, limiting the serious applicability for tensegrity engineering. Some of the other works that consider the behavior of tensegrity towers include Luo et al (2017); Oh et al (2019);Ben Kahla et al (2020); Li et al (2020); Yıldız and Lesieutre (2020). The concept of deployable tensegrity is re-visited by Liu et al (2017) where they proposed the usage of soft elastomers for the programmable deployment of these tensegrities.…”

Section: Tensegrity Towersmentioning

confidence: 99%

Mathematics of stable tensegrity structures

Harish¹,

Nandurdikar²,

Deshpande³

et al. 2023

Journal of Theoretical, Computational and Applied Mechanics

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Tensegrity structures have been extensively studied over the last years due to their potential applications in modern engineering like metamaterials, deployable structures, planetary lander modules, etc. Many of the form-finding methods proposed continue to produce structures with one or more soft/swinging modes. These modes have been vividly highlighted and outlined as the grounds for these structures to be unsuitable as engineering structures. This work proposes a relationship between the number of rods and strings to satisfy the full-rank convexity criterion as a part of the form-finding process. Using the proposed form-finding process for the famous three-rod tensegrity, the work proposes an alternative three-rod ten-string that is stable. The work demonstrates that the stable tensegrities suitable for engineering are feasible and can be designed.

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“…However, while they discuss the active deformation behavior, local soft modes that arise in such structures are not considered, limiting the serious applicability for tensegrity engineering. Some of the other works that consider the behavior of tensegrity towers include Luo et al [32], Oh et al [40], Kahla et al [21], Li et al [27], Yıldız and Lesieutre [67]. The concept of deployable tensegrity is re-visited by Liu et al [29] where they propose the usage of soft elastomers for the programmable deployment of these tensegrities.…”

Section: Introductionmentioning

confidence: 99%

Mathematics of Stable Tensegrity Structures

Harish¹,

Deshpande²,

Rachel³

2021

Preprint

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Tensegrity structures have been extensively studied over the last years due to their potential applications in modern engineering like metamaterials, deployable structures, planetary lander modules, etc. Many of the form-finding methods proposed continue to produce structures with one or more soft/swinging modes. These modes have been vividly highlighted and outlined as the grounds for these structures to be unsuitable as engineering structures. This work proposes a relationship between the number of rods and strings to satisfy the full-rank convexity criterion as a part of the form-finding process. Using the proposed form-finding process for the famous three-rod tensegrity, the work proposes an alternative three-rod ten-string that is both stable. The work demonstrates that the stable tensegrities suitable for engineering are feasible and can be designed.

show abstract

Nonlinear Dynamic Response and Stability Analysis of a Tensegrity Bridge to Selected Cable Rupture

Cited by 7 publications

References 25 publications

Identification of Critical Members in the Progressive Collapse Analysis of Two-Layer Tensegrity Barrel Vaults

Identification of Critical Members in the Progressive Collapse Analysis of Two-Layer Tensegrity Barrel Vaults

Mathematics of stable tensegrity structures

Mathematics of Stable Tensegrity Structures

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