Numerical Investigation on Bending Failure of Concrete Beam Strengthened by Bonded Steel Plate

Abstract:

Based on micromechanics, an elastic-plastic-brittle damage model of concrete beam strengthened by bonded steel plate is proposed by considering the aggregate gradation curve algorithms and the heterogeneity. In this model, the concrete beam strengthened by bonded steel plate is taken as a five-phase composite material that consists of the mortar matrix, coarse aggregate, bonds between matrix and aggregate, steel plate, and the adhesive layer between steel plate and concrete beam. Through the numerical investigation on bending failure of concrete beam strengthened by bonded steel plate under external force, the results show that the model can clearly simulate microscopic plastic yield, and the initiation and extension of crack. The strength of the steel plate is relatively lower and it firstly yield and damage, then the bending stress born on the steel plate is transferred to the concrete beam. This results that the inner cracks of concrete beam increase rapidly and coalesce until the failure of the whole specimen. The final failure mode of concrete beam strengthened by bonded steel plate is the ductile bending failure.

• Periodical: Advanced Materials Research (Volumes 671-674)
• Pages: 906-911
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.671-674.906
• Online since: March 2013
• Authors: Bing Xu, Da Guo Wang, Zhi Xiu Wang
• Keywords: Bending Failure, Concrete Beam Strengthened by Bonded Steel Plate, Damage Mechanics, Elastic-Plastic-Brittle, Solid Mechanics

References

[1] Strengthening techniques in reinforced and pre-stressed concrete structures standard (CECS25: 90) (China Planning Press, China 1990) (in Chinese).

[2] C.J. Felming, G.E.M. King: Materials and Structures Vol. 37(1967), pp.241-251.

[3] C.H. Lerchenthal: Materials and Structures Vol. 37(1967), pp.263-269.

[4] D.A. Van Gemert: Proc. of International Sysmposium on Plastics in Materials, Prague, (1981).

[5] M. Hussain, A. Sharif and I.A. Basunbul etc: Structural Journal Vol. 92(1995), pp.14-23.

[6] N. Barrel: New Civil Engineer (1985).

[7] H. Hugenschmidht: Procs of the First Interational Congress on Polymers in Concrete, London, (1975).

[8] M.L. Wan, J.Y. Han: Construction Technology Vol. (8) (1994), pp.46-48 (in Chinese).

[9] Y.L. Zhou, G.G. Chu: Industrial Construction Vol. (12) (1991), pp.48-51 (in Chinese).

[10] K.F. Wang, W.H. Zhuang and J.H. Gao: Construction Technology Vol. (2) (1992), pp.25-26 (in Chinese).

[11] Y.J. Yu, D.G. Wang and Q. Li etc: Journal of China Coal Society Vol. 37 (2012), pp.585-589 (in Chinese).

[12] J.C. Walraven, H.W. Reinhardt: Heron Vol. 26 (1991), pp.26-33.

[13] L.C. Pei, Z.J. Wang: The Monte Carlo Method and its Application (Ocean Press, China 1998) (in Chinese).