The shortcomings of FRP composite columns are mainly manifested in the following aspects:
1.Poor fatigue resistance: When the FRP composite column is subjected to cyclic load for a long time, its fatigue resistance is relatively poor, and fatigue cracks are easy to occur, resulting in the decline of column strength and stiffness.
2.Poor wear resistance: The surface hardness of the FRP composite column is low, the wear resistance is poor, and it is easy to be worn and scratched.
3.Poor thermal insulation: The thermal insulation performance of FRP composite columns is poor, and there are certain limitations for the use in high-temperature environments.
4.Poor chemical corrosion resistance: FRP composite columns have poor corrosion resistance to certain chemicals, such as acids, alkalis, etc., and are susceptible to chemical corrosion.
5.High installation accuracy requirements: The installation accuracy of FRP composite columns is high, and if the installation is improper or poorly matched, it is easy to lead to problems such as column deformation and loosening.
6.*Higher: Compared with the traditional metal column, the ** of the FRP composite column is higher, which may increase the cost pressure for some projects with limited budgets.
To sum up, although the FRP composite column has the advantages of good strength, stiffness and corrosion resistance, there are also some shortcomings, which need to be considered and solved in the process of design, manufacture and use.