Seismic performance and collapse prevention of concrete-filled thin-walled steel tubular arches |
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| Affiliation: | 1. Key Lab of Structures Dynamic Behaviour and Control (Harbin Institute of Technology), Ministry of Education, Heilongjiang, Harbin 150090, China;2. School of Civil Engineering, Harbin Institute of Technology, Heilongjiang, Harbin 150090, China;1. CTU in Prague, Faculty of Civil Engineering, Deparment of Building Structures, Thákurova 7, Prague, Czech Republic;2. Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prosecká 809/76, Prague, Czech Republic;1. Department of Construction, Università IUAV di Venezia, Dorsoduro 2206, Venice 30123, Italy;2. College of Civil Engineering, Fuzhou University, Fuzhou, Fujian 350108, China;3. Sustainable and Innovative Bridges Engineering Research Center, Fuzhou 350108, China |
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| Abstract: | The primary objective of this paper is to investigate the seismic behaviour of concrete-filled steel tubular (CFST) arches using incremental dynamic analysis (IDA). A nonlinear elastic–plastic finite element model is developed using OpenSees software and is verified with a shaking table test. Single-record IDA studies indicate that a CFST arch undergoes global dynamic instability when subjected to ground motions of increasing intensity levels. During this process, either dynamic elastic buckling or dynamic elastic–plastic buckling may occur. Dynamic strength, which is defined as the capacity for preventing global dynamic instabilities of CFST arches, is determined with a series of multi-record IDA calculations. A lower bound equation that takes into account the effect of slenderness ratio, axial compression ratio, and included angle is proposed for the prediction of the dynamic strength of CFST arches. |
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| Keywords: | Concrete-filled steel tubes Arches Seismic analysis Buckling modes Dynamic instability |
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