Effects of heating and loading histories on post-fire cooling behaviour of concrete-filled steel tubular columns

Concrete-Filled Double Skin Steel Tubular Columns Exposed to ASTM E-119 Fire Curve for 60 and 90 Minutes of Fire

“…Residual strength of fire-damaged columns is important so that it can be used to assess the damage done by fire. Therefore, engineers can calculate the amount of repair that needs to be done [16][17][18][19].…”

Stiffness matrix derivation of space beam element at elevated temperature

“…The finite program FEAST developed by Liu [3] , the FIREFRAME by Wang and Moore [4] , and the FASBUS by Jeanes [5] are all able to analyze the behavior of structure in fire. Also Yang et al [6] developed the program NFEACFST for fire-resistance analysis on concrete-filled steel tubular columns, Zhao et al [7] developed the software NASFAF by using secant stiffness matrix method to study the performance of steel frame under fire condition, and Li [8] developed fire-resistance analysis program for 2D steel frame, using continuous function as material property at high temperature.…”

Numerical analysis of the fire resistance of circular and elliptical slender concrete filled tubular columns

“…These authors assumed a series of simplifications in their model, as neglecting the local buckling of the steel tube and the interaction between the steel tube and the concrete core. Yang et al (2008a) presented a finite element model developed using Visual Fortran, where the column was divided into a small number of two-noded finite elements along its length and each cross-section was subdivided into a large number of blocks which represented the concrete or steel elements. The model was used to analyze the behaviour of CFT columns during the entire stage of fire exposure including loading at ambient temperature, heating, cooling to the ambient temperature and post-fire loading to failure.…”

“…Recently, the group headed by professor Han at Tsinghua University (Beijing, China) (Song et al 2010) developed a realistic finite element threedimensional model in ABAQUS to simulate a set of experiments of concrete filled steel tube stub columns under various thermal and mechanical loading conditions, as previously done in a more simplistic way in Yang et al (2008a). The sequentially coupled thermal-stress analysis module in ABAQUS was used.…”

“…The sequentially coupled thermal-stress analysis module in ABAQUS was used. Different stressstrain relationships at ambient, heating, cooling and post-fire conditions were used, as described in Yang et al (2008a). The model was meshed by means of four-noded shell elements for the steel tube and eight-noded brick elements for the concrete core.…”