Investigation into the Collapse Behavior of a Cable Dome with Hybrid Form and Improvement of the behavior with Force Limiting Devices

Authors

1 Faculty of Civil Engineering, Sahand University of Technology, Tabriz. Iran

2 Faculty of Civil Engineering, Urmia University of Technology, Urmia, Iran

Abstract

Tensegrity systems have been used as a class of light space structures in the various forms including flat modular systems, barrel vaults and cable domes. Conventional cable domes achieve their stability through a concrete compression ring, which is inconsistent with the self-support characteristic of tensegrity systems. The previous evidences also showed that the presence of a rigid support system such as a concrete ring around the space structure especially subjected to seismic loads may cause more structural damages in boundary region of structure. In this research, the combination of a Levy-type cable dome with a tensegrity ring created by the semi-regular modules is considered, which leads to a new hybrid cable-strut system. Form-finding of the studied structures is carried out using the force density method. After designing the hybrid structure, its initial collapse behavior is evaluated by the numerical finite elements method. In this regard, static and dynamic analyses are performed on both the hybrid structure and the cable dome attached to rigid supports to evaluate the effect of the tensegrity ring on the cable dome behavior and also the adequacy of static analyses to estimate capacity of the structures. After estimating the initial behavior and the collapse mechanism type of the studied structures, their behavior, are improved by equipping a number of critical struts with Force-limiting devices.

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References

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Journal of Civil and Environmental Engineering
Volume 53.2, Issue 111 - Serial Number 111
Summer 2023
August 2023
Pages 1-16

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