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Author
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Adam Nagy
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This project focuses on the design and collapse resistance of suspen-domes; in the first part of the work a literature review is presented as the preparation for the actual case study of preliminary design and progressive collapse analysis of the dome.
The review discusses the typical design features, the behavior and the applicable acceptance criteria of suspen-domes. Also the aspects of progressive collapse are presented in general and specifically for suspen-domes. A preliminary design study is carried out for a forty-meter spanning trimmed lamella suspen-dome. It has been proven that the global stability is a governing design aspect, the outermost-ring stiffened suspen-dome can fail even with a moderate stress utilization ratio and deflections if the nonlinear stability with the imperfect geometry is not assessed.
The progressive collapse analyses of the work were carried out according to the strategy of limiting the extent of localized failure. In case of most space structures, including suspen-domes, the alternative load path method with the notional member removal is the most viable approach. The first model, consisting of beams only (Han et al., 2015), was found efficient for locating those member configurations of the notional removal, that are mostly likely causing a progressive collapse. On the other hand, a combined beam & shell model was found as safer and more reliable for predicting the stability and integrity of the remaining structure. The results of the two analyses are compared and discussed. Flowcharts of the used methodologies are presented.
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