The Finite-Element Analysis for CFRP and Steel Bar Strain in the Strengthened Concrete Slab

Abstract:

This paper studies the mechanical behavior of Carbon-fiber-reinforced polymer (CFRP) in one-way reinforced concrete slabs, and the relation of CFRP and steel bar strain under the uniformly distributed load. Based on the theoretical analysis of the constitutive relationship, the analysis calculation model was built by using the ABAQUS software. Data analysis demonstrates that under the same conditions the load-strain curves of CFRP and steel bar are similar, which indicates that the mechanical cooperation performance of CFRP and steel is mutually beneficial. The load-strain curve of CFRP and steel bar is linear before the steel bended, and the curve is approximately linear after the steel bended. In the reinforced stage, the curve is again linear and the strain rate of the CFRP and steel bar increases constantly with the increase of load. This result is valuable for related studies.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1679-1683
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1679
• Online since: May 2012
• Authors: Xi Guang Cui, Jian Wei Ding, Yang Yang, Yong Fang Liu
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Finite Element Analysis (FEA), One-Way Slab, Steel Bar, Strain

References

[1] GB50010-2010，Code for design of concrete structures[S].

[2] CECS146:2003, Technical specification for strengthening concrete structures with carbon fiber reinforcea polymer laminate[S].

[3] GB50367-2006，Degin code for strengthening concrete structure[S].

[4] Francois Buyle-Bodin, Emmanuelle David, Eric Ragneau Finite element modeling of flexural behaviour of externally bonded CFRP reinforced concrete structures .Engineering Structures.2002, (24):1423-1429.

DOI: 10.1016/s0141-0296(02)00085-8

[5] Meier U. Strengthening of Sturetures Using Carbon Fiber/Epoxy Composites. Consturction and Building Materails, 1995, 9(6).

[6] XI Qiaoling, YI Weijian, DING Hongtao. Experiment and Research of Reinforced Concrete Column Externally Bonded with CFRP Sheets Under Eccentric Load [J]. Industrial Construction, 2004, 34(11):78-81. In Chinese.

[7] The Study and Finite Element Analysis of Reinforced Concrete Beam Strengthened with CFRP, Tianjin university architecture engineering institute, 2006. In Chinese.

[8] LU Xinzheng, FENG Peng, YE Lieping. Behavior of FRP-Confined Concrete Square Columns under Uniaxial Loading [J]. China Civil Engineering Journal, 2003, 36(2):46-51.In Chinese.

[9] Experimental Study on Flexural Strength of RC Beams Strengthened with Continuous Carbon Fiber Sheet [J].Building Structure, 2000, (7)

[10] Structure engineering analysis and example explanation [M]. China Architecture and Building Press. In Chinese.