CN207392603U - Steel-epoxy resin mortar multiple tube concrete combination column - Google Patents

Abstract

The utility model discloses a steel-epoxy mortar composite pipe-concrete composite column, which comprises a high-strength thin-walled steel pipe, a profiled steel plate, epoxy mortar and concrete; the high-strength thin-walled steel pipe, profiled steel plate and epoxy The mortar together constitutes the outsourcing composite pipe of the composite column, wherein the high-strength thin-walled steel pipe serves as the outer wall of the composite pipe, the profiled steel plate forms the inner wall of the composite pipe, and the epoxy mortar is filled between the outer wall and the inner wall; the concrete is filled in the profiled Within the inner wall surrounded by steel plates; the average distance between the high-strength thin-walled steel pipe and the profiled steel plate is 3 to 5 times the wall thickness of the high-strength thin-walled steel pipe. The utility model can not only effectively prevent the degradation of the bearing capacity of the combined column due to local buckling of the high-strength thin-walled steel pipe, improve the deformation capacity of the combined column, but also reduce the consumption of steel and reduce the cost of the combined column by using relatively cheap epoxy mortar .

Description

Steel-Epoxy Mortar Composite Tube Concrete Composite Column

technical field

The utility model belongs to the technical field of building structures, in particular to a steel-epoxy mortar composite pipe-concrete composite column.

Background technique

The concrete-filled steel tube column is a new type of high-efficiency composite member developed in recent years, which consists of steel tubes and concrete inside the steel tubes. Through the exertion of combination, CFST can give full play to the material properties of both steel and concrete. In addition, the steel pipe can also be used as a template for concrete pouring, which greatly shortens the construction period. For CFST columns, under other conditions being the same, the higher the yield strength of the steel, the higher the bearing capacity of the column. Therefore, in the case of the same bearing capacity, the use of high-strength steel pipes can reduce the wall thickness of the steel pipes and save steel. However, when the wall thickness of the steel pipe is reduced in the high-strength CFST column, the local stable bearing capacity of the steel pipe will also be reduced accordingly, so that the steel pipe of the composite column will buckle locally before reaching the yield strength. In addition, thin-walled high-strength steel pipes cannot effectively restrain the concrete inside the steel pipes, causing the concrete to show brittle failure, resulting in insufficient deformation capacity of the composite column.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art and provide a steel-epoxy mortar composite tube-concrete composite column.

The technical scheme of the utility model is:

A steel-epoxy mortar composite pipe-concrete composite column, the composite column includes a high-strength thin-walled steel pipe, a profiled steel plate, epoxy mortar and concrete; the high-strength thin-walled steel pipe, profiled steel plate and epoxy mortar together form a composite column Outsourcing composite pipe, wherein, the thin-walled high-strength steel pipe serves as the outer wall of the composite pipe, the profiled steel plate encloses the inner wall of the composite pipe, and epoxy mortar is filled between the outer wall and the inner wall; the concrete is filled in the inner wall surrounded by the profiled steel plate Within; the average distance between the high-strength thin-walled steel pipe and the profiled steel plate is 3 to 5 times the wall thickness of the high-strength thin-walled steel pipe.

Preferably, the high-strength thin-walled steel pipe is a steel pipe for cold bending, welding or seamless structure.

Preferably, the high-strength thin-walled steel pipe has a rectangular cross-section with an aspect ratio of 40-100.

Preferably, the high-strength thin-walled steel pipe has a circular cross-section, and the diameter-to-thickness ratio is 50-150.

Preferably, the profiled steel plate encloses a tubular structure with the same cross-sectional shape as the high-strength thin-walled steel pipe, and the tubular structure coincides with the center of the high-strength thin-walled steel pipe.

Preferably, the profiled steel plate is an open profiled steel plate with a thickness of 0.8-1.6mm.

Compared with the prior art, the utility model has the following advantages and outstanding effects:

The outstanding feature of the steel-epoxy mortar composite pipe-concrete composite column proposed by the utility model is that the steel-epoxy mortar composite pipe is used as the outsourcing component of the composite column. Epoxy mortar has the advantages of high cohesive force, high compressive strength and is not limited by the structural shape. By bonding with thin-walled high-strength steel pipes into a whole, it can effectively avoid local buckling of high-strength thin-walled steel pipes and prevent combination The bearing capacity of the column degrades due to the local buckling of the steel pipe. On the other hand, filling the epoxy mortar between the steel pipe and the profiled steel plate can increase the cross-sectional area of the composite pipe, improve the restraint effect of the composite pipe on the concrete in the pipe, avoid brittle failure of the concrete, and improve the deformation capacity of the composite column. In addition, the profiled steel plate can not only be used as the inner formwork of the composite pipe during construction, but also increase the mechanical bite force and friction between the composite pipe and the concrete inside the pipe, thereby improving the bond strength between the composite pipe and concrete, so that the composite pipe and concrete can Achieving synergistic deformation. To sum up, the utility model can not only effectively prevent the degradation of the bearing capacity of the composite column due to local buckling of the high-strength thin-walled steel pipe, improve the deformation capacity of the composite column, but also reduce the consumption of steel by using relatively cheap epoxy mortar, Reduce the cost of the composite column.

Description of drawings

Fig. 1 is the cross-sectional view of steel-epoxy mortar composite tubular concrete composite column;

Fig. 2 is the three-dimensional view of steel-epoxy mortar composite tubular concrete composite column;

In the figure: 1 - high-strength thin-walled steel pipe; 2 - epoxy mortar; 3 - profiled steel plate; 4 - concrete.

Detailed ways

Below in conjunction with accompanying drawing, the specific implementation method of the present utility model is further described.

Referring to Fig. 1 to Fig. 2, a steel-epoxy mortar composite tubular concrete composite column is composed of high-strength thin-walled steel pipe 1, profiled steel plate 3, epoxy mortar 2 and concrete 4. The high-strength thin-walled steel pipe 1, the profiled steel plate 3 and the epoxy mortar 2 together constitute the outsourcing composite pipe of the combined column, wherein the high-strength thin-walled steel pipe 1 serves as the outer wall of the composite pipe, and the profiled steel plate 3 forms the inner wall of the composite pipe, The epoxy mortar 2 is filled between the outer wall and the inner wall; the concrete 4 is filled in the inner wall surrounded by the profiled steel plate 3; the average distance between the high-strength thin-walled steel pipe 1 and the profiled steel plate 3 is 1 3 to 5 times the wall thickness.

The high-strength thin-walled steel pipe 1 adopts a rectangular cross-section (such as a square), which can be cold-formed, welded or seamless steel pipe, and the width-to-thickness ratio of the rectangular steel pipe cross-section can be 40-100. The profiled steel plate 3 is a prefabricated open profiled steel plate, such as YX75-200-600, with a thickness of 0.8-1.6mm. The epoxy mortar 2 uses epoxy resin as the main agent, quartz sand, wear-resistant powder (such as alumina powder, microsilica powder, cast stone powder, etc.) , with a series of additives such as accelerators, after mixing and curing, a high-strength, high-bonding consolidated body is formed. The profiled steel plate 3 also forms a rectangular tubular structure, and the tubular structure coincides with the center of the high-strength thin-walled steel pipe 1 , and the distance between the high-strength thin-walled steel tube 1 and the profiled steel plate 3 is the thickness of the epoxy mortar 2 .

The construction method of above-mentioned composite column is:

First, the ends of the four profiled steel plates 3 are welded in pairs to form a steel pipe with a rectangular outline. Next, arrange the steel pipe with a rectangular outline in the high-strength thin-walled steel pipe 1, the center of the section of the steel pipe with a rectangular outline is the center of the section of the high-strength thin-walled steel pipe 1, and the average distance between the steel pipe with a rectangular outline and the high-strength thin-walled steel pipe is 1/2 of the wall thickness of the high-strength thin-walled steel pipe 3 to 5 times. Next, the epoxy mortar 2 is poured between the rectangular profile steel pipe and the high-strength thin-wall steel pipe 1. The pouring operation should be uniform and slow to avoid closed air bubbles in the pouring space. The steel-epoxy mortar is completed after the epoxy mortar 2 is cured. Construction of composite pipes. Finally, the configured concrete 4 is poured into the steel-epoxy mortar composite pipe, and the construction of the utility model is completed when the strength of the concrete reaches the requirement.

In addition, in other embodiments, the high-strength thin-walled steel pipe can also be provided with cross-sections of other shapes according to requirements, for example, it can be a circular cross-section with a ratio of diameter to thickness of 50-150.

The above-mentioned embodiments are only used to further illustrate a steel-epoxy mortar composite pipe-concrete composite column of the present invention, but the present invention is not limited to the embodiments. Any simple modification, equivalent change and modification all fall within the protection scope of the technical solution of the utility model.

Claims (6)

1. A steel-epoxy mortar composite pipe-concrete composite column is characterized in that: the composite column comprises high-strength thin-walled steel pipe, profiled steel plate, epoxy mortar and concrete; described high-strength thin-walled steel tube, profiled steel plate and ring Oxygen mortar together constitutes the outsourcing composite pipe of the composite column, wherein, the high-strength thin-walled steel pipe serves as the outer wall of the composite pipe, the profiled steel plate forms the inner wall of the composite pipe, and the epoxy mortar is filled between the outer wall and the inner wall; the concrete is filled in the within the inner wall surrounded by profiled steel plates; the average distance between the high-strength thin-walled steel tube and the profiled steel tube is 3 to 5 times the wall thickness of the high-strength thin-walled steel tube. 2. The steel-epoxy mortar composite pipe-concrete composite column according to claim 1, characterized in that: the high-strength thin-walled steel pipe is a cold-formed, welded or seamless steel pipe. 3. The steel-epoxy mortar composite pipe-concrete composite column according to claim 1, characterized in that: the high-strength thin-walled steel pipe has a rectangular cross-section with a width-to-thickness ratio of 40-100. 4. The steel-epoxy mortar composite pipe-concrete composite column according to claim 1, characterized in that: the high-strength thin-walled steel pipe has a circular cross-section, and the ratio of diameter to thickness is 50-150. 5. The steel-epoxy mortar composite pipe-concrete composite column according to claim 1, characterized in that: the profiled steel plate encloses a tubular structure with the same cross-sectional shape as the high-strength thin-walled steel pipe, and the tubular structure is identical to the described The centers of high-strength thin-walled steel pipes overlap. 6. The steel-epoxy mortar composite tubular concrete composite column according to claim 1, characterized in that: the profiled steel plate is an open profiled steel plate with a thickness of 0.8-1.6 mm.