Numerical Analysis of Fire Performance of a Spacial Pre-Stressed Steel Structure in Fire

Abstract:

The numerical model of analysis of fire performance of a spatial pre-stressed steel structure with large span was established based on the software Marc. The thermal response and structural response of the pre-stressed steel structure was computed for some nodes of the structure in fire. The different fire scenes were considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed steel structure.It is concluded that the temperature rise of the nodes of the structure is far behind that of air near the nodes, however they are quite close as the fire lasted for 3600s and almost the same after 7200s.The results show that the displacement of the node right above the inner cable is the maximum and the node above the outer cable has the smallest value of displacement and the maximum value is about two and half times as large as the minimum.The results show that the reason why the cables are out of work is that the equilibrium between the cables and the rods of the structure is lost, but not that the stress relaxation caused by thermal expansion make the cables out of work.

• Periodical: Advanced Materials Research (Volume 790)
• Pages: 189-192
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.790.189
• Online since: September 2013
• Authors: Tian Hong Wang, Jin Can Xu, Hai Lun Tong, Xin Tang Wang
• Keywords: Fire Performance, Numerical Analysis, Pre-Stressed, Steel Structure

References

[1] Y.J. Shi, Y. Bai and Y. Q. Wang: Chemical Building Material Vol. 34 (2005), p.54 (In Chinese).

[2] Y. Bai, Y. J. Shi and Y. Q. Wang: China Safety Science Journal Vol. 16(2006), p.34 (In Chinese).

[3] Y. Z. Li, G. P. Zhu and Y. X. Kuang: Journal of Disaster Prevention and Mitigation Engineering Vol. 28 (2008), p.492 (In Chinese).

[4] S. L. Dong: Advance in Research and Application of Steel Construction, edited by China Architecture & Building Press, Peking (2009) (In Chinese).

[5] G. Q. Li, L. H. Han and G.B. Lou: Fire Resistant Design of Steel and Steel-Concrete Composite Structures, edited by China Architecture & Building Press, Peking (2006) (In Chinese).