Dynamic Elasto-Plastic Analysis on the Steel Spatial Arch Truss with 30m Span and 0.2 Rise-Span Ratio

Abstract:

In this paper, the elasto-plastic dynamic analysis on the steel spatial arch truss with 30m span and 0.2 rise-span ratio is carried out under earthquake action with SAP2000. In the analyses, the geometric and material nonlinear effects are considered at the same time based on the plastic-hinge theory. Under the action of EL wave with the peak increasing gradually, its elasto-plastic dynamic responses have been obtained. The results show that its failure mode under the earthquake action is elasto-plastic dynamic buckling; that its critical peak acceleration of EL earthquake wave when applied in X direction is 654gal, and is 1108gal when applied in Z direction; The ratio of its maximal node horizontal displacement and its structural height is 1/102, and its displacement ductility coefficient is 4.215 and the ratio of its bars with plastic hinge appearing when buckling is 15.54% when EL-Centro waves applied on structure in X direction; The ratio of its maximal node vertical displacement and its structural span is 1/994, and its displacement ductility coefficient is 1.338 and the ratio of its bars with plastic hinge appearing when buckling is 11.66% when EL-Centro waves applied in Z direction.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 1101-1104
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.1101
• Online since: October 2011
• Authors: Hai Wang Li, Yi Shi, Jing Liu
• Keywords: Earthquake Action, Elasto-Plastic Dynamic Response, Plastic Hinge, Steel Arch Truss

References

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DOI: 10.1016/j.engstruct.2007.07.002