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Experimental study of the cyclic behavior of steel tube in concrete‐filled steel tube members

Auteur(s): (State Key Laboratory of Disaster Reduction in Civil Engineering & Department of Structural Engineering Tongji University Shanghai China)
(State Key Laboratory of Disaster Reduction in Civil Engineering & Department of Structural Engineering Tongji University Shanghai China)
(École Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland)
Médium: article de revue
Langue(s): anglais
Publié dans: ce/papers, , n. 3-4, v. 6
Page(s): 5-10
DOI: 10.1002/cepa.2287
Abstrait:

A concrete‐filled steel tube (CFST) specimen was tested under uniaxial loading to acquire the nonlinear monotonic and cyclic response of the steel tube in CFST members including inelastic cyclic local buckling. The failure mode, hysteretic response, envelope curves, strength, and stiffness degradation of the CFST specimen were comprehensively studied. The observed failure modes of the CFST specimen were local buckling and ductile fracture of the steel tube due to ultra‐low‐cycle fatigue. The effective stress‐strain curve of the steel tube exhibited negative stiffness due to local buckling. The compressive resistance of the CFST specimen decreased significantly when local buckling progressed at the steel tube. The tensile unloading stiffness slightly decreased relative to the elastic stiffness of the CFST specimen; conversely the compressive unloading stiffness experienced severe deterioration upon increased cyclic loading. The tensile stiffness decreased gradually during the whole loading process, while the post‐capping stiffness remained stable.

Structurae ne peut pas vous offrir cette publication en texte intégral pour l'instant. Le texte intégral est accessible chez l'éditeur. DOI: 10.1002/cepa.2287.
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  • Reference-ID
    10767349
  • Publié(e) le:
    17.04.2024
  • Modifié(e) le:
    17.04.2024
 
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