Sensitivity analysis of tensegrity systems due to member loss

Shekastehband, B.; Abedi, Karim; Chenaghlou, Mohammad Reza

doi:10.1016/j.jcsr.2011.03.009

Cited by 33 publications

(13 citation statements)

References 17 publications

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“…Some previous works on element failure in tensegrities are available and worth mentioning. Shekastehband et al [28] perform failure sensitivity analysis of tensegrity grids considering material and geometrical nonlinearities. Korkmaz et al [29] study several failure scenarios and introduce active control for self-repair.…”

Section: Sensitivity To Element Failurementioning

confidence: 99%

Design and Analysis of Tensegrity Power Lines

Dalilsafaei

Tibert

2012

International Journal of Space Structures

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Overhead transmission power lines have undergone very small aesthetic and technical changes over time. Studies on mitigation of the electromagnetic field shows that utilizing a helix configuration is an effective way to reduce the electromagnetic field. This study proposes to use tensegrity structures as power lines. Tensegrity structures are composed of tension and compression elements in equilibrium. Modules, simple units with a certain rotation, are connected together to design of overhead power lines with considerable electromagnetic field reduction. A form-finding method enables the design of various free-form configurations. A parametric study is performed to investigate the influence of the module dimensions on the stiffness of the power line. A design algorithm was used for determining the optimum size of elements and the pre-stress level. The selected baseline structure was able to tolerate the wind and ice loads in severe conditions with a 50 times reduction in electromagnetic field. Finally a sensitivity analysis is performed to show the effects of element loss or damage.

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Section: Sensitivity To Element Failurementioning

confidence: 99%

Design and Analysis of Tensegrity Power Lines

Dalilsafaei

Tibert

2012

International Journal of Space Structures

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“…Limited studies have been conducted the progressive failure of space structures in the last decade. Shekastehband et al [7] investigated the sensitivity of tensegrity grids to removing a member. Their analyses are performed using two methods of static and dynamic non-linear alternative paths.…”

Section: Introductionmentioning

confidence: 99%

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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“…Bhalla et al (2013) investigated damage assessment in a four module tensegrity grid. Shekastehband et al (2011) have studied sensitivity of tensegrity structures to member loss and dynamic propagation of rupture (Shekastehband and Abedi, 2014).…”

Section: Introductionmentioning

confidence: 99%

Using dynamic measurements to detect and locate ruptured cables on a tensegrity structure

Sychterz

Smith

2018

Engineering Structures

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Tensegrity structures are cable-strut systems held in equilibrium due to self-stress. There is potential for damage tolerance when they are kinematically redundant. In this paper, detection and location of a ruptured cable in a deployable tensegrity footbridge are studied through monitoring changes in dynamic behavior. Position values and axial load values of elements are measured before, during, and after a cable breakage. Free and forced-vibration-induced dynamic behavior of the tensegrity structure are characterized in the state of deployment (one half of the structure) and in-service (full structure). Examination of ambient vibrations for the half structure and forced vibrations for the full structure successfully led to detection of ruptured cables. Exclusion of possible damage cases for location using measurements effectively reduces the number of candidate cases when using nodal displacement measurements. Correlation methods using strain measurements are also successful to locate a ruptured cable. These methods reveal the potential for self-diagnosis of complex sensed structures.

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Sensitivity analysis of tensegrity systems due to member loss

Cited by 33 publications

References 17 publications

Design and Analysis of Tensegrity Power Lines

Design and Analysis of Tensegrity Power Lines

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

Using dynamic measurements to detect and locate ruptured cables on a tensegrity structure

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