Mr Zhao Sheng, Mr Zhang Zhi-Ling, Mr Dong Zhao-Hai and Mr Wu Lin-Sen, and technical staff in the Laboratory in College of Civil Engineering in Tongji University. Natural Science Foundation of China (grant no. 50808143) and key innovative research project of Shanghai Municipal Education Commission (grant no. 09ZZ37

Asif Usmani

Chen SW

CNS (Chinese National Standards)

Guo-Qiang Li

Liming Jiang

Suwen Chen

William KJ

Proceedings of the Institution of Civil Engineers - Structures and Buildings

Cementitious coatings are widely used as fire protection for steel structures but they are vulnerable to damage from structural deformations. In this paper, damage mechanisms in cementitious coatings on steel members in bending are investigated. A series of monotonically loaded beam tests are conducted to observe the occurrence of cracks and their propagation leading to final failure. The experiments are then simulated using a cohesive zone finite-element scheme, capable of modelling interfacial damage between the coating and steel substrate as well as internal coating damage. The results of the experimental and numerical studies clearly reveal the distinct damage mechanisms of cementitious coatings on both tension and compression sides of structural steel members in bending. Findings from this study provide the foundation for developing practical methods to determine the condition of cementitious coatings on steel structures after a short-duration extreme loading event (earthquake, blast, windstorms), where there is minimal external damage to the building fabric or longduration cumulative damage from moderate levels of repeated non-monotonic loading. It is very unlikely in either of these cases that the integrity of cementitious fire protective coatings has been investigated in current practice

Usmani, Asif

Chen, Suwen

Jiang, Liming

Li, Guo-Qiang

Edinburgh Research Explorer

Damage mechanisms in cementitious coatings on steel members in bending

Li, G-Q

Usmani, A

Jiang, L

Chen, S

Brunel University Research Archive

 Cementitious coatings are widely used as fire protection for steel structures but they are vulnerable to damage from structural deformations. In this paper, damage mechanisms in cementitious coatings on steel members in bending are investigated. A series of monotonically loaded beam tests are conducted to observe the occurrence of cracks and their propagation leading to final failure. The experiments are then simulated using a cohesive zone finite-element scheme, capable of modelling interfacial damage between the coating and steel substrate as well as internal coating damage. The results of the experimental and numerical studies clearly reveal the distinct damage mechanisms of cementitious coatings on both tension and compression sides of structural steel members in bending. Findings from this study provide the foundation for developing practical methods to determine the condition of cementitious coatings on steel structures after a short-duration extreme loading event (earthquake, blast, windstorms), where there is minimal external damage to the building fabric or long-duration cumulative damage from moderate levels of repeated non-monotonic loading. It is very unlikely in either of these cases that the integrity of cementitious fire protective coatings has been investigated in current practice. </jats:p

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http://bura.brunel.ac.uk/bitstream/2438/11905/1/Fulltext.pdf

Damage mechanisms in cementitious coatings on steel members in bending

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