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Analysis of Axial Bearing Capacity
In the reinforced CFST, there are more than one steel tube to confine the concrete, so its compressive behavior is different from the ordinary CFST. Compressive strength is an important parameter for structural members, and most of the researches were concentrated on the superposition method to calculate the ultimate compressive strength (Zhang et al. in J Comput Theor Nanos 13(2):1422–1425, 2016), so different formulas were deduced for every different cross-section of reinforced CFSTs. To facilitate the practical application of the composite column in seismic retrofit, the ultimate compressive strength of this reinforced column needs to be accurately calculated and properly modeled. In this chapter, some tests on stub CFDST columns are introduced firstly to testify the advantages of reinforced CFST columns. Then, two models are applied to evaluate the ultimate bearing capacity for various sections of reinforced CFST columns, based on the Unified Theory of CFST and elastoplastic limit equilibrium theory respectively. In comparison with other empirical models, the analysis on bearing capacity is extended to predict the optimal design of reinforced CFSTs. Thus, CFDST is confirmed as the applicable heavy-loading column type, and the optimal cross-section is inner circular-outer square, and a parametric investigation is carried out for inner circular tubes.
Analysis of Axial Bearing Capacity
In the reinforced CFST, there are more than one steel tube to confine the concrete, so its compressive behavior is different from the ordinary CFST. Compressive strength is an important parameter for structural members, and most of the researches were concentrated on the superposition method to calculate the ultimate compressive strength (Zhang et al. in J Comput Theor Nanos 13(2):1422–1425, 2016), so different formulas were deduced for every different cross-section of reinforced CFSTs. To facilitate the practical application of the composite column in seismic retrofit, the ultimate compressive strength of this reinforced column needs to be accurately calculated and properly modeled. In this chapter, some tests on stub CFDST columns are introduced firstly to testify the advantages of reinforced CFST columns. Then, two models are applied to evaluate the ultimate bearing capacity for various sections of reinforced CFST columns, based on the Unified Theory of CFST and elastoplastic limit equilibrium theory respectively. In comparison with other empirical models, the analysis on bearing capacity is extended to predict the optimal design of reinforced CFSTs. Thus, CFDST is confirmed as the applicable heavy-loading column type, and the optimal cross-section is inner circular-outer square, and a parametric investigation is carried out for inner circular tubes.
Analysis of Axial Bearing Capacity
Springer Tracts in Civil Engineering
Zhang, Yufen (Autor:in) / Guo, Degang (Autor:in)
18.09.2020
27 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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