Fiber reinforced plastic and ultra-high performance concrete pipe filled common concrete combined column and production method thereof

Abstract

The invention discloses a fiber reinforced plastic and ultra-high performance concrete pipe filled common concrete combined column. The fiber reinforced plastic and ultra-high performance concrete pipe filled common concrete combined column comprises an ultra-high performance concrete pipe, a fiber reinforced plastic coating the outside of the ultra-high performance concrete pipe, and core cast-in-place concrete filled in an inner cavity of the ultra-high performance concrete pipe. A production method comprises the following steps of: manufacturing the ultra-high performance concrete pipe, adhering the fiber reinforced plastic to the outer wall of the ultra-high performance concrete pipe by a wet adhesion method, and filling the core cast-in-place concrete in the inner cavity of the ultra-high performance concrete pipe to form the combined column. The core cast-in-place concrete is restrained by the Fiber Reinforced Plastic (FRP) and the ultra-high performance concrete (UHPC) pipe together, cracking and lateral expansion deformation of the core concrete are delayed, and the bearing capacity, the deformation performance and the ductility of the combined column are greatly improved; the section size can be greatly reduced, the self weight is reduced, and the anti-seismic property of the combined column is further improved; and the fiber reinforced plastic and ultra-high performance concrete pipe filled common concrete combined column has excellent high temperature resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the field of building materials and structural engineering, in particular to a composite column filled with fiber-reinforced material and ultra-high-performance concrete pipes and a production method thereof. Background technique [0002] As the latest generation of advanced cement-based materials, ultra-high performance concrete (UHPC) has great market application potential. UHPC prefabricated pipes double as permanent formwork for reinforced concrete to improve construction efficiency and achieve good economic benefits. They work together with core reinforced concrete to increase bearing capacity. Strength, stiffness and ductility, at the same time as a reinforced concrete protective layer can effectively prevent moisture and erosive media from entering, thereby significantly improving durability and service life. [0003] The combination of external winding fiber reinforced material and ultra-high performance concrete can de...

AI Technical Summary

Problems solved by technology

[0004] At present, ordinary reinforced concrete columns have disadvantages such as large cross-sectional area, self-heavy weight, low bearing capacity, poor ductility, and poor durability.

Although the traditional concrete-filled steel tube composite column makes up for the above-mentioned shortcomings of ordinary concrete columns to a certain extent, it has poor corrosion resistance and fire resistance, and is prone to local buckling and early failure and damage, so that the role of the steel tube cannot be fully utilized. The deformation of the two different materials is inconsistent, and the shrinkage of the concrete may also cause the interface bond failure and voiding between the steel pipe and the concrete.

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