Abstract
In this paper, the results of finite element analyses of a single-layer cylindrical latticed shell under severe earthquake are presented. A 3D Finite Element model using fiber beam elements is used to investigate the collapse mechanism of this type of shell. The failure criteria of structural members are simulated based on the theory of damage accumulation. Severe earthquakes with peak ground acceleration (PGA) values of 0.5 g are applied to the shell. The stress and deformation of the shell are studied in detail. A three-stage collapse mechanism “double-diagonal -members-failure-belt” of this type of structure is discovered. Based on the analysis results, measures to mitigate the collapse of this type of structure are recommended.
Highlights
After the events of 11 September 2001, more and more researchers have carried out research work on the investigation of the mechanism of progressive collapse in buildings, trying to find possible mitigating methods
In this paper, based on thermodynamic theory, the damage evolution equations for fiber beam elements derived by the authors [36] are used to simulate the progressive collapse mechanism of a single-layer cylindrical latticed shell
The results showed that nothing, apart from the time when the dome acceleration (PGA)
Summary
After the events of 11 September 2001, more and more researchers have carried out research work on the investigation of the mechanism of progressive collapse in buildings, trying to find possible mitigating methods. Kato et al [32] performed an analysis on buckling and developed an analytical method for steel reticulated domes with semi-rigid ball joints, on the basis of a nonlinear elastic–plastic hinge analysis equation for three-dimensional beam-columns with elastic–plastic hinges perfectly located at both ends and at the mid-span for each member While those studies focused on the response of the space structure under static load, little research has been carried out on the collapse mechanism of a space structure under seismic load. In this paper, based on thermodynamic theory, the damage evolution equations for fiber beam elements derived by the authors [36] are used to simulate the progressive collapse mechanism of a single-layer cylindrical latticed shell Both a corresponding constitutive relationship for beam elements and a relevant numerical analysis method are developed. Based on this numerical method, parametric studies on single-layer reticulated shells are performed and the collapse mechanism of this type of structure is studied
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