CFRP Embedded Reinforced Concrete Structure Research And Its Application In Foundation Pit Engineering Exploration

Academicians Lv Zhi-Tao, Southeast University, pointed out that many projects needed some repair and reinforcement. Research of how to select a more economical, more reasonable material, will be the trend of the future reinforcement for research in the field and in the future. After two decades the development of carbon fiber-reinforced plastics(CFRP) in repairing and reinforcing the building structure and bridge works been widely used in the field. CFRP composites because of their own with lightweight, high-strength, corrosion resistance, and resistance to fatigue and other advantages in the field of structural reinforcement, gradually replaced by bonded steel plates, increasing section method traditionally reinforced way.In view of this, the research CFRP reinforced concrete structural members to study the application of CFRP in the field of engineering is particularly necessary.This paper reinforced concrete beam and shaped columns by CFRP embedded control initial crack, launched a large number of tests, to achieve better test results. Then the general-purpose finite element analysis software ABAQUS for solving the core, according to their tests, the simulation analysis to consider the many problems caused due to experimental error, to get a better answer. Finally, the author will be strengthened with CFRP technology, based on the finite element simulation, simulation to explore the CFRP composite material used in the excavation support reinforcement and optimize the design, including:(1) In this paper, the study less NSM reinforcement method, the use of CFRP comparative test study, a large number of experimental studies and analysis of reinforced concrete beams and shaped columns, explore the ultimate load and strain indicators before and after the reinforcement to carry out change;(2) Using the ABAQUS finite element analysis software, author participation CFRP reinforced concrete beams and columns finite element simulation analysis to simulate the tests carried out, the experimental and theoretical studies can further guidance; (3) The authors propose a new type of carbon fiber reinforced (CFRP) reinforcement tensile failure in eccentric shaped columns on one side adhesive carbon fiber, carbon fiber reinforcement in the side of the compression failure of implantation. The performance and effectiveness of the modular carbon fiber reinforced concrete columns;(4) For large costs spent on supporting the construction and Pit displacement control reinforcement, this article using the ABAQUS software analog CFRP material in the pit feasibility study to explore enough support shaft reinforcement support, and initialdesigned using a combination of steel and FRP tendons the excavation support beam implantation, reduce the size of the pit support beams and reinforcement, considering its economic, explore and study its feasibility.Finally, the results show that the CFRP Near Surface-Mounted reinforced concrete structure reinforced concrete structure can effectively improve the ultimate bearing capacity and ductility of the structure of a larger, can effectively suppress the crack extension; Based on ABAQUSthe the platform simulation CFRP reinforced concrete structure, can effectively simulate the testing process, and has good feasibility; finite element simulation of CFRP materials in the pit of CFRP excavation engineering feasibility and economicworth engineers further explore its usefulness.