CN212317147U

CN212317147U - Cable net-reinforced concrete frame structure

Info

Publication number: CN212317147U
Application number: CN202021516155.8U
Authority: CN
Inventors: 李莉; 郑涛; 张华刚; 曹新明; 丁婷; 张赟
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-01-08
Anticipated expiration: 2030-07-28

Abstract

The utility model provides a cable net-reinforced concrete frame structure, which comprises a reinforced concrete frame structure, wherein in the reinforced concrete frame structure, two groups of obliquely crossed steel cables are connected in a plane grid formed by frame columns and frame beams to form a cable net; the two ends of each steel cable are connected with the frame columns or the frame beams through anchoring devices. The cable net support of the structure belongs to a flexible support, and the steel cable only bears tension force and cannot generate buckling damage; the steel cables in the two directions work alternately under horizontal loads in different directions, and the yield strength of the steel cables is high, so that the steel cables are in elastic deformation in work, and the deformation of the steel cables basically disappears and returns to the original shape when the steel cables quit work.

Description

Cable net-reinforced concrete frame structure

Technical Field

The utility model relates to a cable net-reinforced concrete frame structure belongs to building structure technical field.

Background

The reinforced concrete frame structure is simple in structure, clear in force transmission, flexible in space separation and material-saving, is widely used in multi-story and high-rise buildings, but has small lateral stiffness, when the building height reaches a certain height, the frame generates large displacement under the action of horizontal load, the use of the building is directly influenced, and the building height is limited. In order to solve the problem of insufficient lateral stiffness of a reinforced concrete frame structure, a rigid support is usually added in the frame structure to form a concrete supporting frame structure, but when a large horizontal load is met, a supporting system is easy to buckle and destabilize, and the horizontal resistance of the structure is sharply reduced, so that the structure is damaged. In order to prevent buckling of the concrete supporting frame, a buckling restrained brace frame structure is developed, but the current buckling restrained brace frame structure needs to be studied deeply, the buckling restrained brace structure is complex, the design is complex, the economic effect is not good enough, the installation is not fast enough, and the light weight and stability are difficult to achieve. In addition, most buckling restrained braces do not have a self-healing function.

Steel cables are used in building construction for a few times and are commonly used in structures such as bridges and retaining walls. In building construction, the steel cable support is usually only partially arranged, and if the steel cable is used as the support in a reinforced concrete frame structure, the advantages of the steel cable are as follows: the concrete frame structure has the advantages of high tensile strength, difficult yielding, high axial tensile rigidity and difficult large deformation under the action of axial tension, thereby effectively limiting the lateral deformation of the area-constrained concrete frame structure. Meanwhile, the steel cable bears a part of horizontal force, so that the horizontal force borne by the area-constrained concrete frame column is greatly reduced, the frame column cannot be sheared and broken, and the horizontal load resistance of the structure is enhanced.

When a plurality of mutually vertical two-way steel cables are arranged in the reinforced concrete frame structure to form a cable net, the steel cables in two directions fully exert the performance of a flexible material under horizontal loads in different directions, work when the steel cables are pulled and quit work when the steel cables are pressed, meanwhile, because the yield strength of the steel cables is high, the steel cables are generally in elastic deformation when the steel cables work, and the deformation of the steel cables basically disappears and restores to the original shape when the steel cables quit work, the self-recovery can reduce or eliminate the residual deformation after an earthquake, and the self-recovery is very beneficial to maintaining the normal use function of the structure after the earthquake.

Therefore, how to effectively combine the steel cable with the reinforced concrete frame structure to exert their respective advantages is a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

To the deficiency among the above-mentioned prior art, the utility model provides a cable net-reinforced concrete frame structure, this structure dead weight is light, can not take place the bucking, and has from restoring the function, and simple structure construction is swift, and simple to operate easily restores, can also effectively improve the anti-seismic performance of building.

The technical scheme of the utility model: a cable net-reinforced concrete frame structure comprises a reinforced concrete frame structure, wherein in the reinforced concrete frame structure, two groups of obliquely crossed steel cables are connected in a plane grid formed by frame columns and frame beams to form a cable net; the two ends of each steel cable are connected with the frame columns or the frame beams through anchoring devices.

Furthermore, the included angle between the steel cables and the horizontal direction is 45 degrees, and the intervals between the steel cables are the same.

Furthermore, the anchoring device is composed of a fixed plate pre-embedded in the frame column or the frame beam and a pull ring welded on the fixed plate.

Due to the adoption of the technical scheme, the utility model has the advantages of:

(1) the cable net support of the structure belongs to a flexible support, and the steel cable only bears tension force and cannot generate buckling damage; the steel cables in the two directions work alternately under horizontal loads in different directions, and the yield strength of the steel cables is high, so that the steel cables are in elastic deformation in work, and the deformation of the steel cables basically disappears and returns to the original shape when the steel cables quit work.

(2) The structure is simple and easy to construct, only anchoring devices are embedded in corresponding positions of the frame beams and the frame columns in the construction process of the conventional reinforced concrete frame structure, and the steel cables are installed after the construction of the main body of the frame structure is finished; the anchoring device has simple structure, can be manufactured in batches in a factory, and effectively saves the construction period;

(3) the steel cable of the structure is convenient to replace, and when the steel cable is damaged or aged under the horizontal action, the steel cable is taken down and replaced by a new steel cable.

Drawings

Fig. 1 is a schematic diagram of a single frame grid in the cable-mesh-reinforced concrete frame structure of the present invention.

FIG. 2 is a schematic diagram of the deformation of a cable-mesh-reinforced concrete frame structure under the action of horizontal load;

FIG. 3 is a schematic view of the connection of steel cables to frame beams or columns when the ends of the steel cables intersect in a cable-mesh-reinforced concrete frame structure;

FIG. 4 is a schematic view of the connection of the steel cables to the frame beams or columns when the ends of the steel cables do not intersect in the cable-mesh-reinforced concrete frame structure;

FIG. 5 is a schematic view of a cable-mesh-reinforced concrete frame structure on the first floor of a building;

fig. 6 is a schematic view of a cable-mesh-reinforced concrete frame structure arranged in a multi-layer multi-span frame plane.

Description of reference numerals: 1-frame columns; 2-a frame beam; 3-cable net; 4-anchoring means; 5-a pull ring; 6-foundation beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and examples.

The embodiment of the utility model provides a: referring to fig. 1, the cable net-reinforced concrete frame structure of the present invention comprises a reinforced concrete frame structure, wherein two groups of obliquely intersecting steel cables 3 are connected in a planar grid formed by frame columns 1 and frame beams 2 to form a cable net; the two ends of each steel cable 3 are connected with the frame column 1 or the frame beam 2 through anchoring devices. The included angle between the steel cable 3 and the horizontal direction is 45 degrees, and the distance between the steel cables 3 is the same. The anchoring device is composed of a fixing plate 4 pre-buried in the frame column 1 or the frame beam 2 and a pull ring 5 welded on the fixing plate 4.

When the cable net-reinforced concrete frame structure is manufactured, the method is implemented according to the following steps:

s1, manufacturing a reinforced concrete frame: determining the positions of the frame column 1 and the frame beam 2 according to the building requirements, and arranging the frame column 1 and the frame beam 2 according to the value-taking principle of the reinforced concrete frame structure; embedding anchoring devices in a plurality of frame grids enclosed by frame columns 1 and frame beams 2 at equal intervals in one or more frame planes, wherein the embedding positions of the anchoring devices should avoid the joints of the frame beams and the column nodes; then pouring reinforced concrete and curing and forming, so that the anchoring device is firmly fixed on the frame column 1 or the frame beam 2;

s2, manufacturing a cable net: in a plane frame of a reinforced concrete frame structure, a frame grid is formed by adjacent frame columns 1 and frame beams 2, the frame grid is a basic unit for arranging a cable net, a first steel cable 3 with an included angle of 45 degrees with the horizontal direction is arranged in the unit by taking a central point of the plane of the frame grid as a base point, and then the steel cable 3 vertical to the first steel cable 3 is arranged; then, other steel ropes 3 are arranged at equal intervals along the parallel direction of the two steel ropes 3 to form a cable net, and the diameter and the number of the steel ropes 3 are calculated according to the requirement of the anti-side; two ends of each steel cable are fixed on anchoring devices on the frame columns 1 or the frame beams 2, and finally, a steel cable tensioning device is adopted to tension each steel cable 3, so that a cable net-reinforced concrete frame structure is formed.

The utility model discloses a theory of operation:

as shown in fig. 2, when the cable-net-reinforced concrete frame structure is subjected to the horizontal load as shown in the figure, the two cables 3 in the cable net are stressed differently, the cable 3 inclined to the right participates in the work, helps the frame structure to share the horizontal load and resist the lateral deformation, and the cable 3 inclined to the left exits the work. If the load is reversed, the steel cables 3 in the two directions are stressed and exchanged, so that the performance of the flexible material can be fully exerted, the structure can have certain self-restoring capacity, and the self-restoring steel cable structure is very beneficial to reducing or eliminating residual deformation after an earthquake and maintaining the normal use function of the structure after the earthquake.

As shown in fig. 3 and 4, the connection between the steel cable 3 and the frame column 1 or the frame beam 2 is schematically shown, and when the steel cable 3 in fig. 3 is intersected at the end, an anchoring device with two pull rings 5 can be adopted for fixing the two steel cables 3. The steel cable 3 of fig. 4 can be used as an anchoring device with a pull ring 5, when the ends do not intersect. And after the steel cable 3 is connected with the frame column 1 or the frame beam 2, a steel cable tensioning device is adopted for tensioning.

As shown in fig. 5, the frame grid is composed of frame columns 1, frame beams 2 and foundation beams 6, the connection of the steel cables 3 and the foundation beams 6 is the same as the connection of the steel cables 3 and the frame beams 2, and the method of arranging the anchoring devices on the foundation beams is the same as the method of arranging the anchoring devices on the frame beams 2.

As shown in fig. 6, the position of the cable net arrangement may be made with reference to the shear wall arrangement position of the frame shear wall structure. And arranging cable nets on the upper and lower grids in the frame plane in a penetrating manner, independently installing the frame grids to form a cable net-reinforced concrete frame structure plane structure, and arranging a plurality of cable net-reinforced concrete frame structure plane structures in one house building to obtain the cable net-reinforced concrete frame structure integral structure.

Claims

1. The utility model provides a cable net-reinforced concrete frame structure, includes reinforced concrete frame structure, its characterized in that: in a reinforced concrete frame structure, two groups of obliquely crossed steel cables (3) are connected in a plane grid formed by a frame column (1) and a frame beam (2) to form a cable net; two ends of each steel cable (3) are connected with the frame column (1) or the frame beam (2) through an anchoring device.

2. A cable-mesh-reinforced concrete frame structure according to claim 1, wherein: the included angle between the steel cables (3) and the horizontal direction is 45 degrees, and the intervals between the steel cables (3) are the same.

3. A cable-mesh-reinforced concrete frame structure according to claim 1, wherein: the anchoring device is composed of a fixed plate (4) pre-buried in the frame column (1) or the frame beam (2) and a pull ring (5) welded on the fixed plate (4).