Finite Element Analysis on Mechanical Performance of CFRP Used in Masonry Structure Strengthening

Abstract:

CFRP is a new kind of building materials popularly used in structure strengthening. When CFRP is used to strengthen the masonry structures built by the traditional building materials-bricks and mortar, good reinforcing effect will be achieved. But there are still a lot of theoretical difficulties in CFRP’s application in structure strengthening. The paper studied the mechanical performance of CFRP strengthening the masonry structures by finite element analysis. Ansys is used in the paper to establish discrete models of brick walls strengthened by CFRP. In the models, mortar and blocks are given different material properties and simulated by contact elements and plane elements respectively. Through the comparison of the results of finite element calculation and experimental study, the mechanical performance of the walls is studied. The study shows that contact elements can simulate the mortar very well and the mechanical performance of the discrete models presented in the paper meets the actual masonry structure well too; in addition, the strengthening material-CFRP can improve the mechanical performance of the walls effectively.

• Periodical: Advanced Materials Research (Volumes 228-229)
• Pages: 592-596
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.228-229.592
• Online since: April 2011
• Authors: Zhao Yang, Wei Gang Wu
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Contact Element, Finite Element, Masonry Structure

References

[1] Yang Zhao, Gu Qian, Peng Shaomin. Experimental Reserch on the Brick Wall with a Door Strengthened by Carbon Fiber Sheet[J]. Journal of Wuhan University of Technology. 2005, 27(9): 70-73(in Chinese).

[2] Yang Zhao, Zhu Gang, Huang Renjing. The Analysis on Seismic Shear Capacity of Brick Wall Strengthened by CFRP [J]. Journal of Wuhan University of Technology. 2007, 9(3): 96-98(in Chinese).

[3] Gawady E. l., Mohamed Ao. ShearStrength of URM Walls Retrofitted Using FRP[J]. Engineering Structures, 2006, 28(12): 1658~1670.

DOI: 10.1016/j.engstruct.2006.03.005

[4] Antonietta Aiello Maria. Structural Upgrading of Masonry Columns by Using Composite Reinforcements[J]. Journal of Composites for Construction, 2007, 11(6): 650~658.

DOI: 10.1061/(asce)1090-0268(2007)11:6(650)

[5] Gabriele Milani. Homogenized Limit Analysis of FRP-reinforced Masonry Walls Out-of-Plane Loaded[J]. Comput Mech, 2009(43): 617–639.

DOI: 10.1007/s00466-008-0334-7

[6] Lu Huifang, Gu Qian, Peng Shaomin. Experimental Study on Seismic Reinforcement of Brick Wall with a Window by Carbon Fiber Sheet [J]. Journal of Huazhong University of Science and Technology. 2005, 22(5): 105~108(in Chinese).

[7] Ansys Inc. ANSYS Theory Reference[M]. Cali-fornia: Sun Microsystems Inc, (2000).

[8] Lai Yongbiao, Hu Renxi, Huang Shuzhen. Example of finite element analysis in civil engineering [M]. Publishing house of electronics industry, 2007(in Chinese).

[9] Liu Guiqiu. The Research on the Basic Mechanical Behavior of Masonry Structure[D]. Hunan: Hunan Univesity, 2005(in Chinese).