Analysis of Fire Resistance for X-Type Intersecting Joints of Stainless Steel Square Pipes and Round Branch Pipes

DOI

10.2991/978-94-6463-856-1_21How to use a DOI?

Keywords

stainless steel; X-joints; fire resistance performance; refractory temperature

Abstract

This article conducts an in-depth study on the fire resistance performance of the X-type intersecting joint of stainless steel square main pipes and round branch pipes. By establishing a finite element model, the mechanical behavior of the joint in a fire environment is simulated, and the effects of parameters such as width ratio β, main pipe flange width-to-thickness ratio 2γ, thickness ratio τ, and branch pipe load ratio n on the fire resistance performance of the joint are analyzed. The study found that an increase in the value of β shortens the fire resistance time, lowers the failure temperature, and changes the failure mode from ductile failure to brittle failure; similarly, increases in 2γ and n also shorten the fire resistance time and lower the failure temperature but do not affect the failure mode; the increase of τ has little effect on the fire resistance performance of the joint, with the fire resistance time and failure temperature remaining essentially constant. This study provides a theoretical basis for optimizing the design of X-type intersecting joints and improving the safety of steel structures in fire situations.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Shilong Jia
AU  - Yunqiang Zhang
PY  - 2025
DA  - 2025/09/22
TI  - Analysis of Fire Resistance for X-Type Intersecting Joints of Stainless Steel Square Pipes and Round Branch Pipes
BT  - Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
PB  - Atlantis Press
SP  - 207
EP  - 216
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-856-1_21
DO  - 10.2991/978-94-6463-856-1_21
ID  - Jia2025
ER  -