|Table of Contents|

Study on Load-bearing Fire Resistance Test of New Light Steel Composite Wall and Simplified Calculation of Temperature Rise at Thermal Flange of Wall Column(PDF)

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

Issue:
2022年02期
Page:
11-18
Research Field:
防灾减灾工程
Publishing date:

Info

Title:
Study on Load-bearing Fire Resistance Test of New Light Steel Composite Wall and Simplified Calculation of Temperature Rise at Thermal Flange of Wall Column
Author(s):
CHEN Wei1; 2;  LIU Kun1; 2;  YE Ji-hong1; 2;  JIANG Jian1; 2;  GAO Liang1;  LIU Bin3
(1. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 2. Xuzhou Key Laboratory for Fire Safety of Engineering Structures, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 3. Department of Construction Engineering, Zhejiang College of Construction, Hangzhou 311231, Zhejiang, China)
Keywords:
light steel composite wall;  fire resistance limit;  temperature rise increment expression;  homogeneous protective layer;  equivalent thermophysical parameter
PACS:
TU392.5
DOI:
10.19815/j.jace.2021.07037
Abstract:
A new type of light steel composite wall structure was proposed, in which autoclaved aerated concrete(ALC)board and calcium-silicate(CS)board were used as sheathing board, and steel skin and steel strip were used as joint protection measures of wallboard. The full-scale model load bearing and fire resistance test of light steel composite wall with ALC board-CS board was carried out. The fireproof structure composed of different cladding boards on the fire side of light steel composite walls was simplified into a homogeneous protective layer, and a simplified calculation method of equivalent thermophysical parameters(including thickness, specific heat capacity, density and thermal conductivity)was proposed. According to the principle of energy conservation and the finite difference method, a simplified temperature rise increment expression of wall column hot flange of the ALC board-CS board sheathed light steel composite wall was proposed. The results show that the high fire resistance limit of the ALC board-CS board sheathed light steel composite wall with high temperature bearing capacity failure under the condition of 0.27 load ratio reaches 197 min, showing excellent fire resistance. The prediction results of simplified temperature rise increment expression agree well with the finite element simulation results, which can be used to determine the fire resistance limit of light steel composite wall.

References:

[1] YU W W,LABOUBE R A.Cold-formed Steel Design[M].4th ed.Hoboken:John Wiley & Sons,Inc.,2010.
[2]叶继红,陈 伟,许 阳.冷弯薄壁型钢复合墙体受剪性能数值模拟及简化力学模型研究[J].建筑结构学报,2018,39(11):94-103.
YE Ji-hong,CHEN Wei,XU Yang.Numerical Simulation and Simplified Mechanical Model on Shear Behavior of Enhanced Cold-formed Steel Composite Wall[J].Journal of Building Structures, 2018,39(11):94-103.
[3]陈 伟,叶继红,许 阳.夹芯墙板覆面冷弯薄壁型钢承重复合墙体受剪试验[J].建筑结构学报,2017,38(7):85-92.
CHEN Wei,YE Ji-hong,XU Yang.Shear Experiments of Load-bearing Cold-formed Thin-walled Steel Wall System Lined with Sandwich Panels[J].Journal of Building Structures, 2017,38(7):85-92.
[4]CHEN W,YE J H,ZHAO Q Y,et al.Full-scale Experiments of Gypsum-sheathed Cavity-insulated Cold-formed Steel Walls Under Different Fire Conditions[J].Journal of Constructional Steel Research,2020,164:105809.
[5]KESAWAN S,MAHENDRAN M.A Review of Parameters Influencing the Fire Performance of Light Gauge Steel Frame Walls[J].Fire Technology,2018,54(1):3-35.
[6]KODUR V K R,SULTAN M A.Factors Influencing Fire Resistance of Load-bearing Steel Stud Walls[J].Fire Technology,2006,42(1):5-26.
[7]叶继红,陈 伟,尹 亮.C形冷弯薄壁型钢承重组合墙体足尺耐火试验研究[J].土木工程学报,2013,46(8):1-10.
YE Ji-hong,CHEN Wei,YIN Liang.Full-scale Fire Resistance Tests on Load-bearing C-shape Cold-formed Steel Wall Systems[J].China Civil Engineering Journal,2013,46(8):1-10.
[8]CHEN W,JIANG J,YE J H,et al.Thermal Behavior of External-insulated Cold-formed Steel Non-load-bearing Walls Exposed to Different Fire Conditions[J].Structures,2020,25:631-645.
[9]CHEN W,YE J H,ZHAO Q Y,et al.Mid-scale and Full-scale Experiments of Cavity-insulated Gypsum and Calcium-silicate Sheathed CFS Walls Under Different Fire Exposures[J].Thin-walled Structures,2020,155:106928.
[10]CHEN W,YE J H,BAI Y,et al.Full-scale Fire Experiments on Load-bearing Cold-formed Steel Walls Lined with Different Panels[J].Journal of Constructional Steel Research,2012,79:242-254.
[11]DIAS Y,MAHENDRAN M,POOLOGANATHAN K.Full-scale Fire Resistance Tests of Steel and Plasterboard Sheathed Web-stiffened Stud Walls[J].Thin-walled Structures,2019,137:81-93.
[12]CHEN W,YE J H,BAI Y,et al.Improved Fire Resistant Performance of Load Bearing Cold-formed Steel Interior and Exterior Wall Systems[J].Thin-walled Structures,2013,73:145-157.
[13]CHEN W,YE J H,BAI Y,et al.Full-scale Fire Experiments on Load-bearing Cold-formed Steel Walls Lined with Different Panels[J].Journal of Constructional Steel Research,2012,79:242-254.
[14]叶继红,陈 伟,彭 贝,等.冷弯薄壁C型钢承重组合墙耐火性能简化理论模型研究[J].建筑结构学报,2015,36(8):123-132.
YE Ji-hong,CHEN Wei,PENG Bei,et al.Simplified Theoretical Model on Fire Performance of Load Bearing Cold-formed Steel Wall Systems[J].Journal of Building Structures,2015,36(8):123-132.
[15]SULTAN M A.A Model for Predicting Heat Transfer Through Noninsulated Unloaded Steel-stud Gypsum Board Wall Assemblies Exposed to Fire[J].Fire Technology,1996,32(3):239-259.
[16]CHEN W,YE J H,TONG Y K,et al.Influence of Board Joint Configurations on the Fire Performance of CFS Walls[J].Journal of Constructional Steel Research,2021,179:106553.
[17]冯 禹.轻钢组合构件常用建材的高温热物理试验方法研究[D].徐州:中国矿业大学,2021.
FENG Yu.Research on High-temperature Thermophysical Test Methods of Common Building Materials for Cold-formed Composite Components[D].Xuzhou:China University of Mining and Technology,2021.
[18]Eurocode 3:Design of Steel Structures.Part1.2:General Rules-structural Fire Design:EN 1993-1-2[S].Brussels:ECS,2005.
[19]ARIYANAYAGAM A D,MAHENDRAN M.Fire Design Rules for Load Bearing Cold-formed Steel Frame Walls Exposed to Realistic Design Fire Curves[J].Fire Safety Journal,2015,77:1-20.

Memo

Memo:
-
Last Update: 2022-03-20