Seismic response and failure mechanism of single-layer latticed domes with steel columns and braces as substructures. (March 2018)

• Record Type: Journal Article
• Authors: Yang, Dabin; Yun, Chaoguang; Wu, Jinzhi; Yao, Yunlong
• Is Part Of: Thin-walled structures. Volume 124(2018)
• Page Start: 458
• Page End: 467
• Publication Date: 2018-03
• Subjects: Seismic response -- Failure mechanism -- Single-layer latticed domes -- Low cycle fatigue -- IDA; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2017.12.038
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Seismic response and failure mechanism of single-layer latticed domes with steel columns and braces as substructures are studied using incremental dynamic analysis in the paper. The member models considering cyclic buckling and low cycle fatigue of steel are used in the analyses. The results show that the seismic responses will be greatly influenced by the material low cycle fatigue under strong earthquakes in different ways for the domes with different parameters. Two typical failure modes are found for the structures: one is the failure of domes and the other is the failure of both the dome and the substructure. Influence of rise-span ratio of domes, brace sections and column sections in substructures on the ultimate PGA and yielding PGA are studied, and the optimized values of the parameters are suggested for structural designing. Highlights: The member models considering cyclic buckling and low cycle fatigue of steel are used in the analyses. Effects of low cycle fatigue on seismic responses are studied. Typical failure modes under strong earthquakes are found.