Stress performance of embedded carbon fiber reinforced plastics plate consolidated reinforced concrete structure

Hua Zhu

doi:10.3221/igf-esis.46.33

Abstract

With the development of the building industry, various novel building materials have emerged. Modern buildings requires higher on performance of building materials, and the performance of old buildings has not been able to keep up the pace of the times. Extending the service time of old buildings by repairing and reinforcing is inevitable. In this study, 10 reinforced concrete beams including 2 ordinary reinforced concrete beams and 8 carbon fiber reinforced plastics (CFRP) plate reinforced test beams were manufactured. Three-dimensional finite element model was established using finite element software to simulate and compare the stress performance of the strengthening beams with different number of CFRP plate, size, number of groove and shear span ratio. The results demonstrated that the ultimate carrying capacity of the embedded CFRP plate reinforced beams was obviously superior to that of the ordinary reinforced concrete beams; two plates and two grooves were appropriate; the larger the shear span ratio, the better the bearing performance and the smaller the deformation. CFRP plate consolidated reinforced concrete can effectively stabilize buildings which need repairing and reinforcement.

Highlights

With the acceleration of urbanization, the performance of many old buildings has not been able to satisfy the requirements of the society
The finite element analysis software ANSYS was used for simulation, and the simulated values were compared with the test values to verify the effectiveness of the model; the stress performance of Carbon Fiber Reinforced Plastics (CFRP) plates in different structures was simulated using finite element model to analyze the influence of different number of CFRP plate, grooving mode and shear span ratio on beams and explore the best reinforcement way of embedded CFRP plate
Taghia et al [15] explored the influence of CFRP plate on reinforced concrete short columns using finite element software, studied different aspects of constraint effect such as difference of sectional dimension, number of carbon fiber cloth and volume ratio of carbon fiber cloth, and found that outside sticking of carbon fiber cloth was quite effective in improving the axial strength and ductility of concrete short columns

Summary

INTRODUCTION

With the acceleration of urbanization, the performance of many old buildings has not been able to satisfy the requirements of the society. Embedded Carbon Fiber Reinforced Plastics (CFRP) plate reinforcement is a prospective method in the reinforcement of reinforced concrete beams. Rezazadeh M et al [4] designed an experimental procedure to evaluate the influence of prestress technology on the bending performance of the embedded CFRP plate consolidated reinforced concrete beams and found that prestressing could improve the load carrying capacity corresponding to the concrete cracking and steel yielding initiations. FRP reinforcement can effectively strengthen the bending and shear resistance performance of reinforced concrete beams [10], which has many advantages compared to other reinforcement methods. In this study ANSYS was used for simulating and analyzing embedded CFRP plate consolidated reinforced beams.

Design of component

Findings

DISCUSSION AND CONCLUSION