|Table of Contents|

Study on Fire Resistance of Axially Compressed Partially-encased Composite Steel and Concrete Columns with Different Strengthening Measures(PDF)

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

Issue:
2022年02期
Page:
19-29
Research Field:
防灾减灾工程
Publishing date:

Info

Title:
Study on Fire Resistance of Axially Compressed Partially-encased Composite Steel and Concrete Columns with Different Strengthening Measures
Author(s):
HU Chen1;  ZHANG Hui-jie1;  WANG Jing-feng2; 3;  SUN Tong2;  LIU Yong2; 3
(1. Research Institute of Economics and Technology of State Grid Anhui Electric Power Co., Ltd., Hefei 230009, Anhui, China; 2. School of Civil and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China; 3. Advanced Steel Structure Technology and Industrialization Collaborative Innovation Center of Anhui, Hefei University of Technology, Hefei 230009, Anhui, China)
Keywords:
PEC column;  fire resistance performance;  axial compression;  strengthening measure;  fire resistance limit
PACS:
TU398
DOI:
10.19815/j.jace.2021.08082
Abstract:
Due to the exposed steel flanges, the fire resistance limit of partially-encased composite steel and concrete(PEC)columns is difficult to meet the design requirements. In order to explore the strengthening method of the fire resistance performance of PEC columns and obtain the economic and reasonable strengthening measures, the ABAQUS was used to establish the temperature field and the thermodynamic finite element models of PEC columns under axial compression. The reliability of the model was verified using the existing test data, and the temperature field, stress mechanism and failure mode of PEC column in fire were investigated. The parameter analysis was carried out to study the influence of parameters such as load ratio, longitudinal reinforcement ratio, flange area ratio, section size, slenderness ratio and fireproof coating thickness on the fire resistance limit of PEC columns. The results show that the fire resistance limit of PEC columns will improve with the decrease of the load ratio, slenderness ratio and flange area ratio and the increase of the fireproof coating thickness and section size. A simplified equation is regressed based on the parametric analyses to predict the fire resistance limit of PEC column considering the influence of fire proof coating thickness. The research results will provide a scientific basis for the fire resistance design of the PEC components.

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Last Update: 2022-03-20