Structural fire safety design of square and rectangular tubed-reinforced-concrete columns

Structural behaviour and design of end-restrained square tubed-reinforced-concrete columns exposed to fire

“…On the other hand, when the column starts to contract as temperature rises, the axial restraint becomes beneficial as it relieves the axial force in the column. Since the previous studies [11,12] indicate that the working mechanism of TRC columns exposed to fire is very different from those of the steel columns, CFST columns and steel columns encased in concrete, it is expected that the effects of end restraints on the fire performance of TRC columns may also be different from those of the other column types referred to above.…”

“…[10] have investigated the fire behaviour of circular TRC columns, both experimentally and numerically, and they have proposed a practical fire design method. Additional fire tests of five square and two rectangular slender TRC columns have been reported by the authors of this paper [11,12]. A finite element analysis (FEA) model has also been developed and validated against experiments [12].…”

“…Additional fire tests of five square and two rectangular slender TRC columns have been reported by the authors of this paper [11,12]. A finite element analysis (FEA) model has also been developed and validated against experiments [12]. Then the model has been used for comprehensive parametric studies, facilitating the development of the fire design method for the square and rectangular TRC columns [12].…”

“…A finite element analysis (FEA) model has also been developed and validated against experiments [12]. Then the model has been used for comprehensive parametric studies, facilitating the development of the fire design method for the square and rectangular TRC columns [12].…”

Creep behavior of reinforced concrete-filled steel tubular columns under axial compression

“…The fire failure of an external steel tube under longitudinal load is often considered in CFST columns, and the reinforcement in RCFST columns improves their fire resistance. Thus, any fire damage to the steel tube would have little influence on the fire resistance limit of the columns [ 4 – 6 ]. RCFST columns overcome some of the drawbacks of CFST columns in practical applications, with advantages of high bearing capacity, simple joint structure, and good ductility.…”