Izvorni znanstveni članak
https://doi.org/10.30765/er.39.1.8
Fire resistance of circulat steel tubes infilled with ultra-high strength concrete with external fire protection
Xiao Lyu
; School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
Erfeng Du
; School of Civil Engineering, Southeast University, Nanjing 210096, ChinaKey Laboratory of C & PC Structures, Ministry of Education, Southeast University, Nanjing 210096, China
Ran Li
; School of Civil Engineering, Southeast University, Nanjing 210096, ChinaKey Laboratory of C & PC Structures, Ministry of Education, Southeast University, Nanjing 210096, China
Sažetak
In this paper, a non-linear three-dimensional finite element model is presented in order to study the behaviour of axially loaded ultra-high strength concrete filled circular hollow tubular columns exposed to fire. Ultra-high strength concrete with compressive strength greater than 180 N/mm2 has been developed for concrete filled tubes for use in high–rise buildings. This paper studies the structural performance of fire protected ultra-high strength concrete filled tubular columns exposed to the standard ISO fire. The aim of this work is to understand and represent the behaviour of axially loaded ultra-high strength concrete filled circular hollow tubular columns in fire situations and to compare calculation results with experiment. The numerical analyses are carried out using a general finite element analysis package ABAQUS and the results are validated against the test results in terms of heat distribution and mechanical behavior. Comparison with the test results showed a reasonable agreement with finite element results in terms of temperature prediction and load displacement behavior during the fire.
Ključne riječi
finite element analysis; fire protection; fire resistance; circular steel tube; Ultra-high strength concrete
Hrčak ID:
215366
URI
Datum izdavanja:
14.1.2019.
Posjeta: 1.075 *