Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Buckling length determination of concrete filled steel tubular column under axial compression in standard fire test
Abstract The structural behavior of the column under fire becomes essential since it concerns the safety of buildings and people inside in case of fire event occurs. The standard fire tests were usually used to evaluate the resistance of the members under fire. This paper presents a method to determine the buckling length that was used to predict the resistance of the concrete filled steel tubular (CFST) column under axial compression in standard fire test. In this method, the fourth-order differential equation was used to develop the analytical model. Various boundary conditions of the column at working condition, e.g. fixed–fixed, fixed–pinned, and pinned–pinned, were considered in this analytical model. Design formulae and charts were developed to determine the buckling lengths that considered varying flexural stiffness along the column height in fire. Temperature-independent buckling lengths were also proposed to further simplify the fire resistance design procedure. To establish the validity, the determined fire resistance of CFST columns based on the analytical and proposed buckling lengths were compared with test results in literature and predictions based on empirical buckling lengths.
Buckling length determination of concrete filled steel tubular column under axial compression in standard fire test
Abstract The structural behavior of the column under fire becomes essential since it concerns the safety of buildings and people inside in case of fire event occurs. The standard fire tests were usually used to evaluate the resistance of the members under fire. This paper presents a method to determine the buckling length that was used to predict the resistance of the concrete filled steel tubular (CFST) column under axial compression in standard fire test. In this method, the fourth-order differential equation was used to develop the analytical model. Various boundary conditions of the column at working condition, e.g. fixed–fixed, fixed–pinned, and pinned–pinned, were considered in this analytical model. Design formulae and charts were developed to determine the buckling lengths that considered varying flexural stiffness along the column height in fire. Temperature-independent buckling lengths were also proposed to further simplify the fire resistance design procedure. To establish the validity, the determined fire resistance of CFST columns based on the analytical and proposed buckling lengths were compared with test results in literature and predictions based on empirical buckling lengths.
Buckling length determination of concrete filled steel tubular column under axial compression in standard fire test
Xiong, Ming-Xiang (Autor:in) / Yan, Jia-Bao (Autor:in)
2015
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch