Method for compositely strengthening steel pipe column through external sleeveing of circular steel pipe concrete fibre composite materials

Abstract

The invention provides a method for compositely strengthening a steel pipe column through external sleeveing of circular steel pipe concrete fibre composite materials. The method is characterized by comprising the following steps that (1), polishing and derusting are conducted on the surface of an original steel pipe column; (2), an externally-sleeved circular steel pipe is installed on the periphery of the original steel pipe column, and the original steel pipe column is wrapped with the externally-sleeved circular steel pipe; (3), the fibre strengthening composite materials are twined outside the externally-sleeved circular steel pipe; and (4), after adhesives of the fibre strengthening composite materials are solidified, filling materials are poured between the original steel pipe column and the externally-sleeved circular steel pipe. According to the method for compositely strengthening the steel pipe column through the external sleeveing of the circular steel pipe concrete fibre composite materials, a steel pipe concrete structure is applied to the solidifying process of the steel pipe column, and a method for local solidifying or overall solidifying of a damaged steel pipe column through externally-coated steel pipe concrete is provided; when local solidifying is conducted, the externally-sleeved steel pipe mainly has a hooping effect, and when overall solidifying is conducted, the externally-sleeved steel pipe can jointly bear the pressure and has the hooping effect, so that a new thought is provided for the solidifying method of the steel pipe column.

Description

technical field [0001] The invention relates to a method for reinforcing a building structure, in particular to a method for compositely reinforcing a steel pipe column with a circular steel pipe concrete fiber composite material. Background technique [0002] Concrete filled steel tubes can give full play to the advantages of steel tubes and core concrete, and can make up for the respective shortcomings of these two materials. It has the advantages of high bearing capacity, good ductility, good energy consumption, and good seismic performance. At present, it is widely used in multi-storey, high-rise and super high-rise buildings, long-span bridges, large-scale industrial plants and other structures. It is convenient for construction, shortens the construction period, and reduces cost and achieved good economic results. In the existing steel pipe concrete, concrete is poured in the steel pipe to form a solid composite structure, so as to increase the strength and rigidity o...

AI Technical Summary

Problems solved by technology

Patent Publication No. CN1538012A "Hollow Concrete Steel Tube" proposes a combination of two coaxial steel tubes with unequal diameters to fill the gap between the inner and outer tubes with concrete to form a hollow interlayer concrete tube column to ensure the strength of the column. , to increase the cross-sectional area and reduce the self-weight of the structure. This structure has a good application prospect in new construction. Usually, two steel pipes of equal length are fixed and then poured into concrete to form a new composite structure. But this patent relates to a A reinforcement method for building structures. The service structure may be under stress because it cannot be completely unloaded before reinforcement, resulting in strain lag between the original components and the newly added parts, and the reduction of the material utilization rate of the newly added parts. At present, there is no in-depth study on the mechanical mechanism of this structural reinforcement method.

If it is replaced as a whole, the installation and transportation costs are higher, especially in remote areas

In addition, power transmission or production needs to be stopped during construction, which will affect normal life and production

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