FRP (fiber reinforce plastic) tube-concrete-multiple steel tube hollow combined single-box or multi-box multi-compartment beam

Abstract

The invention discloses a FRP (fiber reinforce plastic) tube-concrete-multiple steel tube hollow combined single-box or multi-box multi-compartment beam, which is composed of an outer FRP tube, built-in steel tubes and concrete, wherein the concrete is arranged between the two layers; the outer FRP tube is in a single-box or multi-box multi-compartment beam form; the number of the built-in steel tubes is equal to or greater than two; and the longitudinal central axes of the built-in steel tubes are arranged in the outer FRP tube in an axial symmetry mode so as to form a hollow combined single-box or multi-box multi-compartment beam. The beam disclosed by the invention is in a single-box multi-compartment beam or multi-box multi-compartment beam combined form, so that the integrity, torsional stiffness and stability of a combined member can be effectively improved, thereby improving the unbalanced load and horizontal load bearing capacities of the combined member; the combined member has good ductility and earthquake resistance; the member is externally coated with a corrosion-resistant material FRP, so that the built-in steel tubes and concrete are effectively protected, therefore, the member has good durability, and low later-period maintenance costs; and the member also has the advantages of light self-weight, convenience in construction, and the like, and has a broad application prospect in areas with high requirements on durability and earthquake resistance.

Description

technical field [0001] The invention relates to a single-box or multi-box and multi-chamber beam composed of FRP pipe-concrete-multi-steel tube hollow composite. Background technique [0002] Concrete-filled steel tube technology has been widely used in practical engineering, but because the steel tubes are exposed, they are easily corroded by the external environment. In some large-scale construction projects that require high bending and compressive capacity, if the steel tube concrete technology is used, the overall cross-sectional size of the component must be increased to ensure that it has sufficient bearing capacity, but increasing the component cross-section not only consumes materials , and will increase the self-weight of the component. [0003] In recent years, Fiber Reinforced Polymer (FRP) has been widely used in the maintenance and reinforcement of old structures due to its light weight, high strength and corrosion resistance, and has begun to be applied in ne...

AI Technical Summary

Problems solved by technology

[0002] Concrete-filled steel tube technology has been widely used in practical engineering, but because the steel tubes are exposed, they are easily corroded by the external environment

In some large-scale construction projects that require high bending and compressive capacity, if the steel tube concrete technology is used, the overall cross-sectional size of the component must be increased to ensure that it has sufficient bearing capacity, but increasing the component cross-section not only consumes materials , and will increase the self-weight of the component

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