CN207228402U - The reinforced concrete shear wall of built-in prestress steel diagonal brace - Google Patents

Abstract

The utility model relates to the technical field of concrete buildings, in particular to a reinforced concrete shear wall with built-in prestressed steel diagonal braces, including concrete wall supports, steel trusses and prestressed steel diagonal braces built in the concrete wall supports, and is characterized in that: Prestressed steel diagonal braces include diagonal brace casings and prestressed steel bars. Two pairs of opposite diagonal through holes are reserved on both sides of the steel truss, and the same diagonal brace casings are inserted into the opposite diagonal through holes. The pipes form a cross shape and are staggered from each other. The grouting channels reserved on the side of the diagonal brace casing extend to the outside of the concrete wall support; the diagonal brace casing penetrates into the prestressed steel bar, and after prestressing and anchoring are applied to both ends of the prestressed steel bar, the The grouting channel of the slanted casing is filled with grout. The utility model combines the prestressing technology and the steel-concrete composite structure technology, and proposes a new type of reinforced concrete shear wall with built-in prestressed steel diagonal bracing, which prevents premature cracks, has a simple structure, is safe and reliable.

Description

Reinforced Concrete Shear Wall with Built-in Prestressed Steel Diagonal Braces

technical field

The invention relates to the technical field of concrete buildings, in particular to a reinforced concrete shear wall with built-in prestressed steel diagonal braces.

Background technique

With the rapid development of my country's national economy and the continuous acceleration of urbanization, high-rise buildings are developing rapidly, and shear walls are the most basic vertical structural components in high-rise building structures. Lateral member. However, as the height of buildings continues to rise, traditional shear walls are difficult to meet the functional requirements of buildings.

However, the steel concrete shear wall has good bearing capacity and ductility, and has great development potential.

A lot of research has been done at home and abroad on the steel concrete shear wall. It was found that the steel and concrete are jointly stressed and have good bearing capacity and ductility. However, under repeated horizontal loads, the surface of the steel concrete shear wall components prematurely Cracks appear, and the cracks continue to grow under the earthquake, and the damage is aggravated, resulting in serious stiffness and strength degradation. The prestressed concrete structure is more and more widely used in the engineering field due to its characteristics of controlling the development of cracks, reducing the deformation of the structure under load, and improving the restoring force performance after unloading. In combination, there are still problems such as construction difficulties and complex structures.

Contents of the invention

In view of the above technical defects, the purpose of the present invention is to provide a reinforced concrete shear wall with built-in prestressed steel braces. The present invention combines prestressed technology and steel-concrete composite structure technology to propose a method to prevent premature cracks, A new type of reinforced concrete shear wall with built-in prestressed steel diagonal bracing is simple in structure, safe and reliable.

Technical scheme of the present invention is as follows:

A reinforced concrete shear wall with built-in prestressed steel diagonal braces, including concrete wall supports, steel trusses built in concrete wall supports and prestressed steel diagonal braces, characterized in that: the prestressed steel diagonal braces include diagonal brace sleeves pipe and prestressed steel bar, two pairs of opposite diagonal through holes are respectively reserved on both sides of the steel truss, and the same diagonal bracing casing is inserted into the opposite diagonal through holes, and the diagonal bracing casing Form a cross shape between them and stagger each other, the grouting channel reserved on the side of the diagonal brace casing extends to the outside of the concrete wall support; the diagonal brace casing penetrates into the prestressed steel bar, and the two ends of the prestressed steel bar are applied After prestressing and anchoring, grout is poured into the grouting channel of the brace casing.

Through the built-in prestressed steel diagonal bracing structure, the diagonal bracing sleeves form a cross shape and are staggered with each other, so that the tensioned prestress can be more effective on the concrete of the steel concrete shear wall, and the prestress can be improved. utilization rate.

Specifically, the brace casing is one of square steel casing, PVC casing or corrugated casing. .

Specifically, distributed steel bars are arranged inside the concrete wall support.

Specifically, reinforcement treatment is performed at the inclined through hole.

Through reinforcement treatment, the integrity of the tunnel is ensured, the service life of the tunnel is extended, and the seismic performance of the structure is enhanced.

The reinforcement treatment makes it have the safety, durability and applicability required by the current design specifications and the owner.

Specifically, the prestressed steel bars are FRP bars.

The tensile strength of FRP bars is high, and its tensile strength is significantly higher than that of steel bars, and FRP materials have almost no plastic deformation before reaching the tensile strength.

Preferably, the steel truss is welded by channel steel, flat steel and angle steel.

Preferably, the slurry is cement mortar or asphalt.

Specifically, the prestressing method is post-tensioning, and the prestressed steel bars are anchored by gaskets and double-layer nuts.

Using the post-tensioning method, it has the characteristics of convenient construction, safety and reliability.

Specifically, the anchor is provided with special-shaped steel bars to prevent local stress on the concrete.

The beneficial effects created by the present invention are:

(1) Combining prestressing technology with steel concrete, the steel concrete shear wall itself has better seismic performance, and the existence of prestress prevents premature concrete cracks on the surface of the wall support, resulting in aggravated damage and severe stiffness and strength degradation . Compared with other components, this invention has better seismic performance, can effectively delay the generation and development of cracks in the wall during the stress process, and has a significant effect on the number, length and width of the restrained shear oblique cracks. With the increase of tension control stress, the effect becomes more significant.

(2) Through the built-in prestressed steel diagonal bracing structure, the diagonal bracing sleeves are penetrated at both ends of the steel truss and the diagonal bracing sleeves are formed in a cross shape and staggered from each other, and then prestressed steel bars are installed in the diagonal bracing sleeves for anchoring. The structure It is simple, making the tensioning work safe and reliable, and it can be realized by simple standard parts of gaskets and nuts, and it has strong control over the size of prestress.

(3) The grouting work is more convenient, and the grouting materials and casing materials can adopt different schemes according to the actual engineering conditions, combined with the energy consumption capacity and economy of components.

Description of drawings

Fig. 1 is a structural representation of a reinforced concrete shear wall with built-in prestressed steel braces in Embodiment 1 of the present invention;

Fig. 2 is a left sectional view of a reinforced concrete shear wall with built-in prestressed steel braces in Embodiment 1 of the present invention;

Fig. 3 is a top view of a reinforced concrete shear wall with built-in prestressed steel diagonal braces in Embodiment 1 of the present invention;

Fig. 4 is a diagram of a built-in steel truss of a reinforced concrete shear wall with built-in prestressed steel diagonal braces in Embodiment 1 of the present invention.

Part names and serial numbers in the figure:

Concrete wall supports 1, steel trusses 2, diagonal bracing sleeves 3, prestressed steel bars 4, distributed steel bars 5.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in the accompanying drawings 1-3, the reinforced concrete shear wall with built-in prestressed steel diagonal bracing of the present embodiment includes a concrete wall support 1, a steel truss 2 built in the concrete wall support 1 and a prestressed steel diagonal brace. The stress steel diagonal brace includes a diagonal brace sleeve 3 and a prestressed steel bar 4, wherein as the most preferred solution, the diagonal brace sleeve 3 of the present embodiment adopts a PVC sleeve, and the prestressed steel bar 5 adopts a FRP bar with high tensile strength, and Not limited to this.

As shown in FIG. 4 , it is a perspective view of the built-in steel truss 2 of this embodiment, and the steel truss 2 is welded by channel steel, angle steel, and flat steel.

Partial oblique through holes are reserved on the side of the steel truss 2 to facilitate the insertion of the oblique bracing casing 3. The grouting channels reserved for the oblique bracing casing 3 protrude from the outside of the wall support. The bottom end of the steel bar 4 is anchored by gaskets and nuts, and the top protrudes to a certain length to facilitate post-stress tensioning; the steel bar 5 is bound and distributed, and the formwork is nailed, and the concrete is poured and vibrated compactly; when the concrete reaches a certain strength, post-tensioning The top of the prestressed steel bar 4 is stretched in one direction, and when the tension reaches a certain value, use gaskets and nuts to anchor it; after the tension is completed, use a grouting machine to pour cement mortar into the inside of the diagonal brace casing 3 through the reserved grouting channel slurry.

The undescribed technical features of the present invention can be realized by or using the prior art, and will not be repeated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Those of ordinary skill in the art Changes, modifications, additions or substitutions made within the essential scope of the present invention shall also belong to the protection scope of the present invention.

Claims (9)

1. A reinforced concrete shear wall with built-in prestressed steel diagonal braces, comprising a concrete wall support (1), a steel truss (2) built in the concrete wall support (1) and prestressed steel diagonal braces, characterized in that: The prestressed steel braces include brace casings (3) and prestressed steel bars (4). Two pairs of opposite diagonal through holes are respectively reserved on both sides of the steel truss (2). The same slanting sleeves (3) are penetrated into the through holes, and the slanting sleeves (3) form a cross shape and are staggered from each other. Grouting channels are reserved on the sides of the slanting sleeves (3) to extend to the outside of the concrete wall support (1); after the diagonal bracing casing (3) penetrates into the prestressed steel bar (4), and the two ends of the prestressed steel bar (5) are prestressed and anchored, the The grouting channel of the diagonal brace casing (3) is filled with slurry. 2. A reinforced concrete shear wall with built-in prestressed steel braces according to claim 1, characterized in that: the brace casing (3) is a square steel casing, a PVC casing or a corrugated casing one of them. 3. A reinforced concrete shear wall with built-in prestressed steel diagonal bracing according to claim 1 or 2, characterized in that: the concrete wall support (1) is provided with distributed steel bars (5) inside. 4. The reinforced concrete shear wall with built-in prestressed steel diagonal braces according to claim 1, characterized in that: the inclined through holes are reinforced. 5. A reinforced concrete shear wall with built-in prestressed steel diagonal braces according to claim 1, characterized in that: the prestressed steel bars (4) are FRP bars. 6. A reinforced concrete shear wall with built-in prestressed steel braces according to claim 1, characterized in that: said steel truss (2) is welded by channel steel, flat steel and angle steel. 7. A reinforced concrete shear wall with built-in prestressed steel braces according to claim 1, wherein the slurry is cement mortar or asphalt. 8. The reinforced concrete shear wall with built-in prestressed steel braces according to claim 1, characterized in that: the method of applying prestress is post-tensioning, and the prestressed steel bars are anchored by gaskets and double-layer nuts (4). 9. A reinforced concrete shear wall with built-in prestressed steel diagonal bracing according to claim 1 or 8, characterized in that: the anchor is provided with a special-shaped steel bar to prevent local stress on the concrete.