|Table of Contents|

Performance and bearing capacity calculation method of concrete-filled double steel tubular composite stub columns under fire(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年01期
Page:
128-137
Research Field:
建筑结构
Publishing date:

Info

Title:
Performance and bearing capacity calculation method of concrete-filled double steel tubular composite stub columns under fire
Author(s):
YANG Qingtian1;  DUO Fei1;  ZHANG Jinchuan1;  HOU Liqun2;  CHEN Shicai1
(1. Department of Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2. China Railway Construction Group Co., Ltd., Beijing 100040, China)
Keywords:
concrete-filled double steel tubular composite stub column;  temperature field;  fire resistance limit;  simplified calculation formula;  bearing capacity
PACS:
TU398.9
DOI:
10.19815/j.jace.2022.03101
Abstract:
In order to study the fire resistance of concrete-filled double steel tubular composite stub columns(CFDST), a refined numerical model of CFDST was established. Based on the verification of test results of similar components, the high-temperature response law and fire resistance influence factor of CFDST were analyzed. The effects of internal pipe diameter thickness ratio, external pipe diameter thickness ratio, internal and external pipe diameter ratio were comprehensively analyzed. The fire resistance limits of CFDST with different section combinations(inner circle and outer circle, inner square and outer circle, inner circle and outer square)were compared and analyzed. Based on the theory of heat conduction analysis, the temperature field distribution formula of CFDST section was deduced, and the formula was modified according to the results of finite element simulation. Finally, based on the principle of temperature equivalence, the simplified calculation formula and bearing capacity calculation method of section temperature field of CFDST under fire were further proposed. The results show that CFDST has good fire resistance. Increasing the thickness of the inner steel tube when the diameter is unchanged and increasing the diameter of the inner steel tube when the thickness is unchanged are conducive to the improvement of the fire resistance limit. Under the condition of the same load and steel content, the fire resistance limit of CFDST with different section combinations is almost the same, but on the whole, the fire resistance of double circular steel tube concrete stub column is better. The difference between the simplified calculation formula of temperature field, the bearing capacity calculation method and the finite element results is less than 15%.

References:

[1] ROMERO M L,ESPINOS A,PORTOLES J M,et al.Slender double-tube ultra-high strength concrete-filled tubular columns under ambient temperature and fire[J].Engineering Structures,2015,99:536-545.
[2]WAN C Y,ZHA X X,DASSEKPO J B M.Analysis of axially loaded concrete filled circular hollow double steel tubular columns exposed to fire[J].Fire Safety Journal,2017,88:1-12.
[3]CAMARGO A L,RODRIGUES J P C,FAKURY R H,et al.Fire resistance of axially and rotationally restrained concrete-filled double-skin and double-tube hollow steel columns[J].Journal of Structural Engineering,2019,145(11):04019128.
[4]XIONG M X,XIONG D X,RICHARD LIEW J Y.Behaviour of steel tubular members infilled with ultra high strength concrete[J].Journal of Constructional Steel Research,2017,138:168-183.
[5]EKMEKYAPAR T,AL-ELIWI B J M.Concrete filled double circular steel tube(CFDCST)stub columns[J].Engineering Structures,2017,135:68-80.
[6]钱稼茹,张 扬,纪晓东,等.复合钢管高强混凝土短柱轴心受压性能试验与分析[J].建筑结构学报,2011,32(12):162-169.
QIAN Jiaru,ZHANG Yang,JI Xiaodong,et al.Test and analysis of axial compressive behavior of short composite-sectioned high strength concrete filled steel tubular columns[J].Journal of Building Structures,2011,32(12):162-169.
[7]XIONG M X,XIONG D X,RICHARD LIEW J Y.Axial performance of short concrete filled steel tubes with high-and ultra-high-strength materials[J].Engineering Structures,2017,136:494-510.
[8]RICHARD LIEW J Y,XIONG D X.Ultra-high strength concrete filled composite columns for multi-storey building construction[J].Advances in Structural Engineering,2012,15(9):1487-1503.
[9]AHMED M,LIANG Q Q,PATEL V I,et al.Numerical analysis of axially loaded circular high strength concrete-filled double steel tubular short columns[J].Thin-walled Structures,2019,138:105-116.
[10]AHMED M,LIANG Q,PATEL V,et al.Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete[J].Engineering Structures,2019,201:109790.
[11]CI J C,JIA H,CHEN S C,et al.Performance analysis and bearing capacity calculation on circular concrete-filled double steel tubular stub columns under axial compression[J].Structures,2020,25:554-565.
[12]ESPINOS A,ROMERO M L,LAM D.Fire performance of innovative steel-concrete composite columns using high strength steels[J].Thin-walled Structures,2016,106:113-128.
[13]LU H,ZHAO X L,HAN L H.FE modelling and fire resistance design of concrete filled double skin tubular columns[J].Journal of Constructional Steel Research,2011,67(11):1733-1748.
[14]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
HAN Linhai.Concrete filled steel tubular structures:theory and practice[M].3rd ed.Beijing:Science Press,2016.
[15]LU H,ZHAO X L,HAN L H.Testing of self-consolidating concrete-filled double skin tubular stub columns exposed to fire[J].Journal of Constructional Steel Research,2010,66(8/9):1069-1080.
[16]CI J C,CHEN S C,JIA H,et al.Axial compression performance analysis and bearing capacity calculation on square concrete-filled double-tube short columns[J].Marine Structures,2020,72:102775.
[17]CI J C,JIA H,AHMED M,et al.Experimental and numerical analysis of circular concrete-filled double steel tubular stub columns with inner square hollow section[J].Engineering Structures,2021,227:111400.
[18]周绪红,张瑞芝,王卫永,等.火作用下钢管约束钢筋混凝土柱温度场分析[J].钢结构,2017,32(1):105-110,116.
ZHOU Xuhong,ZHANG Ruizhi,WANG Weiyong,et al.Temperature distribution analysis of steel tube confined RC columns in fire[J].Steel Construction,2017,32(1):105-110,116.

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Last Update: 2024-01-25