CN201071566Y - Fiber-reinforced plastic-steel pipe-concrete column - Google Patents

Abstract

A fiber reinforced plastics-steel tube-concrete column, which relates to an architectural element, consists of a steel tube, a fiber reinforced plastic circular tube and concrete filled therein. The utility model is characterized in that: the steel tube of the concrete column is produced through welding steel plates; the fiber reinforced plastic circular tube is made by winding fiber reinforced plastic cloth on a winding machine, and then arranged in the central part of the concrete column; the geometric center of the fiber reinforced plastic circular tube coincides with that of the concrete column; and the concrete column is filled therein with the concrete. The utility model has the advantages of high bearing capacity, high rigidity, light weight, good plasticity and toughness, good impact resistance and fatigue resistance, great aseismic performance, etc.

Description

A fiber-reinforced plastic-steel pipe-concrete column

technical field

The utility model relates to a building component, in particular to a composite column composed of three different materials: FRP, steel pipe and concrete.

Background technique

At present, due to the advantages of flexible layout and large use space, the frame structure has received extensive attention from engineering. The frame column as the main component of the frame structure is generally an ordinary reinforced concrete column, that is, the steel cage is bound first, the formwork is supported, and the concrete is poured at last. The production of this traditional reinforced concrete column has long construction period, great difficulty, and The shortcoming of low efficiency, Chinese utility model patent No. 03248845.9 provides an improved "a reinforced concrete column", including reinforced concrete prefabricated components, steel bars, reinforced concrete columns are composed of multiple reinforced concrete cylindrical prefabricated components, longitudinal reinforcement positioning net A plurality of reinforced concrete tubular prefabricated components are stacked to form a column formwork, and a longitudinal reinforcement positioning mesh suitable for the inner cavity of the tubular prefabricated component is arranged between the joints of adjacent reinforced concrete tubular prefabricated components. The steel bars are interspersed in the longitudinal steel bar positioning mesh grid, and multiple reinforced concrete cylindrical prefabricated components are connected in series, and then concrete is poured in the cavity of the column mold where the reinforced concrete cylindrical prefabricated components are stacked, and finally a reinforced concrete column is formed. Although this improved reinforced concrete column preliminarily overcomes the shortcomings of the traditional reinforced concrete column, it cannot meet the increasingly high requirements of high-rise buildings on the concrete structure used. For this reason, people have developed novel concrete structure again, for example No. 3051161 of the United States provides and fills the steel pipe with concrete, to increase the technical scheme of the steel pipe concrete structure of compressive strength. Chinese utility model patent No. 99236299.7 provides "a new type of concrete-filled steel pipe column", wherein the steel pipe used for filling concrete is a special-shaped thin-walled steel pipe, and restraint rods are arranged on each side of the special-shaped thin-walled steel pipe. The problem of the single shape of the existing steel pipe concrete column is solved, but there are still disadvantages that restraint rods need to be set in order to prevent the local instability of the thin-walled steel pipe, and the construction is often inconvenient.

Contents of the invention

The purpose of this utility model is to provide a kind of FRP-steel pipe-concrete column, this concrete column is made of rectangular or square steel pipe, round FRP pipe placed in the steel pipe and concrete filled therein, the steel pipe is welded by steel plate, It can be rectangular or square. The FRP round tube is wound by FRP cloth, which can reduce the cross-sectional size of the column, improve the ductility of the column, and increase the bearing capacity of the column.

The purpose of this utility model is achieved by the following technical solutions:

A fiber-reinforced plastic-steel pipe-concrete column is composed of steel pipe, round fiber-reinforced plastic pipe and concrete poured into it. Manufactured on the machine, the fiber-reinforced plastic circular tube is arranged at the center of the concrete column, the geometric center of the fiber-reinforced plastic circular tube coincides with the geometric center of the concrete column, and concrete is poured inside the concrete column.

A fiber reinforced plastic-steel pipe-concrete column as described above has a concrete column with a rectangular or square cross-sectional shape.

For a fiber reinforced plastic-steel pipe-concrete column as described above, the fiber reinforced plastic circular tube can be filled with concrete or not, that is, the concrete column can be hollow or solid.

Advantage and effect of the present utility model are:

1. The utility model is a combined column composed of three different materials: FRP, steel pipe and concrete. It utilizes the circular FRP pipe placed inside the steel pipe to reduce the lateral pressure of the core concrete on the steel pipe wall, and there is no need to set restraint rods, which can reduce the number of components The cross-sectional size, the steel pipe skeleton can provide temporary support during construction to speed up construction.

2. The utility model improves the ductility of the column and the bearing capacity of the column due to the existence of the steel pipe, which is beneficial to the seismic design in the earthquake zone.

3. When the FRP-steel pipe-concrete column of the present invention is in use, it can reduce the weight of the building and increase the effective use area.

Description of drawings

Fig. 1 is the rectangular solid structure schematic diagram of the utility model concrete column;

Fig. 2 is the square solid structure schematic diagram of concrete column of the present invention;

Fig. 3 is a schematic diagram of a rectangular hollow structure of a concrete column of the present invention;

Fig. 4 is the square hollow structure schematic diagram of concrete column of the present invention;

Detailed ways

The utility model is described in detail below with reference to accompanying drawing.

The FRP (fiber reinforced plastic) pipe-steel pipe-concrete column of the present utility model is a composite column composed of three materials: FRP, steel pipe and concrete, that is, the FRP-steel pipe-concrete composite column, wherein the cross-sectional shape of the FRP-steel pipe-concrete column It is a rectangular structure or a square structure, which can be divided into pouring concrete into the FRP pipe and not pouring concrete, that is, hollow and solid.

Example 1

As shown in Fig. 1, the section of the FRP-steel pipe-concrete column provided by the utility model is a rectangular solid structure, mainly composed of a rectangular steel pipe 1, a round FRP pipe 3 and concrete 2 poured therein. (1) The steel pipe is welded by steel plates, and the two ends of the steel pipe are turned flat on a lathe to ensure the flatness and verticality of the two ends of the steel pipe. The geometric center coincides and the quality of the weld is guaranteed; (2) The round FRP pipe is made by winding method, and the fiber fabric is cut according to the size required by the design; use a brush to evenly apply the prepared bottom layer adhesive to the winding thin plastic film On the PVC pipe (mold) that plays the role of demoulding, the adjusted primer should be used up within the specified time, and the next step of construction can be carried out when the finger is dry; use a roller brush or a brush, and a scraper to dip in the preparation Apply a good surface layer adhesive evenly on the PVC pipe; stick the carbon fiber cloth on it, and use a hard rubber or plastic scraper to roll back and forth to drive out the air bubbles and promote the penetration of the adhesive; the fiber lap length is 100mm, and the bottom layer is glued After the dipping glue is fully penetrated, scrape the upper layer of glue, and scrape back and forth to make the adhesive penetrate into the carbon fiber cloth; after 1-2 hours at room temperature, use a plastic scraper to roll back and forth to eliminate possible floating and misalignment; Apply a layer of adhesive evenly on the surface of the two-layer fiber cloth; after standing for a day, take the round pipe made of FRP cloth from the PVC pipe. The above work can also be done on the winding machine. (3) When pouring concrete, first fix the FRP round pipe in the steel pipe to ensure that the geometric centers of the two coincide, then place the steel pipe vertically, pour concrete from the top, and vibrate fully for half a minute for every 150mm of concrete poured. The prepared FRP-steel pipe-concrete column is cured in a curing room, and the curing room temperature is about 20°C.

Example 2

As shown in Figure 2, the cross-section of this FRP-steel pipe-concrete column of the utility model is a square solid structure, mainly composed of square steel pipes 4, round FRP pipes 3 and concrete 2 poured into it, and the steel pipes are welded by steel plates , the round FRP pipe is made of FRP cloth on a winding machine.

Its concrete preparation method is identical with embodiment 1.

Example 3

As shown in Figure 3, the section of this FRP-steel pipe-concrete column of the present utility model is a rectangular hollow structure, mainly composed of a rectangular steel pipe 1, a round FRP pipe 3 and concrete 2 poured between the rectangular steel pipe and the round FRP pipe. Composition, the steel pipe is welded by the steel plate, and the FRP round pipe is made by the FRP cloth on the winding machine.

The specific manufacturing method is the same as that of Example 1, except that concrete is only poured between the rectangular steel pipe and the FRP pipe, and no concrete is poured in the FRP pipe.

Example 4

As shown in Figure 4, the section of this FRP-steel pipe-concrete column of the present utility model is a square hollow structure, mainly composed of a square steel pipe 4, a round FRP pipe 3 and concrete 2 poured between the square steel pipe and the round FRP pipe. Composition, the steel pipe is welded by the steel plate, and the FRP round pipe is made by the FRP cloth on the winding machine.

The specific manufacturing method is the same as that of Example 1, except that concrete is only poured between the rectangular steel pipe and the FRP pipe, and no concrete is poured in the FRP pipe.

Claims (3)

1. fibre reinforced plastic-steel pipe-concrete column, form by steel pipe, cylindrical fibre reinforced plastic pipe and the concrete that pours into wherein, it is characterized in that, the steel pipe of this coagulation upper prop is welded by steel plate, cylindrical fibre reinforced plastic pipe (3) is made on winding machine by fibre reinforced plastics cloth, the fibre reinforced plastics pipe is located at the centre of concrete column, and the geometric center of fibre reinforced plastics pipe and the geometric center of concrete column overlap, the inside concreting (2) of concrete column.

2. a kind of fibre reinforced plastic-steel pipe-concrete column according to claim 1 is characterized in that, the cross sectional shape of concrete column is rectangular configuration or square structure.

3. a kind of fibre reinforced plastic-steel pipe-concrete column according to claim 1 is characterized in that, but penetration concrete or penetration concrete not in the fibre reinforced plastics pipe, and promptly concrete column can be hollow or solid.

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