CN203230191U - Reinforced structure for resisting progressive collapse of existing concrete structure - Google Patents

Abstract

The utility model discloses a reinforced structure for resisting continuous collapse of an existing concrete structure. The reinforced structure for resisting continuous collapse of the existing concrete structure is to embed steel strands inside the reinforced concrete beams or slabs that need to be reinforced, and the two ends of the steel strands are respectively anchored on both sides of the reinforced concrete beams or slabs. Vertical load-bearing members or reinforced concrete beams. According to the reinforced structure of the utility model, when the existing concrete structure is subjected to accidental loads and the vertical components fail, the beams or floors originally supported by the failed vertical components will have a large vertical displacement. At this time, after reinforcement The steel strands in the beams or slabs will play the role of suspension cables to bear the vertical load, avoiding the large-scale damage and collapse of the existing concrete structure that does not match the accidental action or the accidental load, that is, the reinforced structure can improve the existing concrete structure. Progressive collapse resistance of concrete structures.

Description

Reinforcement of Existing Concrete Structures against Progressive Collapse

technical field

The utility model relates to the technical field of building reinforcement, in particular to a reinforced structure for resisting continuous collapse of an existing concrete structure.

Background technique

The continuous collapse of the building structure refers to the local damage of the structure caused by accidental effects (such as gas explosion, bomb attack, vehicle impact, fire, etc.), and triggers a chain reaction that causes the damage to spread to other parts of the building structure, eventually causing a large-scale collapse of the building structure. collapsed. The problem of progressive collapse of building structures is a problem of widespread concern in the world, which seriously threatens the safety of life and property, and has a major social impact. Therefore, how to improve the resistance to progressive collapse of building structures has very important research value. However, for existing buildings with insufficient ability to resist progressive collapse, how to strengthen the structure against progressive collapse is a problem that must be solved.

For existing concrete structures, under the action of accidental loads (explosion, impact, fire, earthquake, etc.), the failure of vertical components will be caused. The beams and floors originally supported by vertical components are under the action of unbalanced vertical loads. There will be a large vertical displacement. When the vertical displacement is small, the beam (floor) provides collapse resistance through the flexural bearing capacity; when the vertical displacement is large, the axial tension of the longitudinal reinforcement in the beam (floor) forms the suspension cable effect to provide collapse resistance. When the longitudinal reinforcement in the beam (floor) is broken, the existing concrete structure will not be able to complete the redistribution of internal forces under large displacements, and continuous collapse will occur.

Utility model content

The utility model provides an existing concrete structure anti-continuous collapse reinforcement structure, and the reinforcement structure can improve the anti-continuous collapse ability of the existing concrete structure.

According to the reinforced structure of the existing concrete structure against continuous collapse of the utility model, steel strands are embedded inside the reinforced concrete beams or floors of the existing concrete structures and the two ends of the steel strands are respectively anchored to the existing concrete structures superior.

According to the utility model, the buried steel strands are not stressed under normal use conditions. When the vertical load-bearing components of the existing concrete structure fail under the action of accidental loads and cause vertical displacement of the beams or floors, the buried steel strands in the beams or floors The steel strand is subjected to axial tension due to deformation. The steel strand has high strength and can provide a large axial tensile force. When the vertical displacement of the beam or floor is large, it can provide a large suspension force for the remaining existing concrete structure after the failure of the vertical component, thus effectively Prevent the occurrence of continuous collapse.

In addition, the reinforcement structure according to the present invention can also have the following additional technical features:

The reinforced concrete beam or the floor is provided with slots, and the steel strands are arranged in the slots.

The slot is arranged in the protective layer of the reinforced concrete beam or floor slab.

The steel strands are arranged in the slots and then grouted into the slots to embed the steel strands in the reinforced concrete beams or floor slabs.

Both ends of the steel strand are respectively anchored to the reinforced concrete beam or vertical load-bearing members or reinforced concrete beams on both sides of the floor slab.

An anti-corrosion paint is coated on the steel strand.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of a reinforced structure of an existing concrete structure against progressive collapse according to an embodiment of the present invention.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal" etc. The orientation or positional relationship shown is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a New types of restrictions.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Referring to FIG. 1 and FIG. 2 , the reinforcement structure of an existing concrete structure against progressive collapse according to an embodiment of the present invention will be described below.

The first thing that needs to be explained here is that the main body of the building structure is made of reinforced concrete. For example, as shown in Figure 1 and Figure 2, the existing concrete structure may include: protective layer 1, reinforced concrete floor 2, reinforced concrete beam 3, longitudinal stress reinforcement 4 in the beam, stress reinforcement 7 in the floor, and vertical load-bearing member 9 .

It should also be noted here that, in the schematic diagram of the reinforced structure shown in Figure 1 , the vertical load-bearing member 9 may be a reinforced concrete column or a shear wall in a specific building structure.

According to the reinforcement structure of the utility model embodiment, steel strands 5 are embedded inside the reinforced concrete beam 3 or the reinforced concrete floor 2 of the existing concrete structure that needs to be reinforced, and the two ends of the steel strands 5 are respectively anchored to the existing concrete. structurally. Specifically, both ends of the steel strand 5 can be respectively anchored to the vertical load-bearing members 9 on both sides of the reinforced concrete beam 3 or the reinforced concrete floor 2 .

According to the reinforced structure of the utility model, the embedded steel strand 5 is not stressed under normal conditions, and when the vertical load-bearing member of the building structure fails under the action of an accidental load, the vertical displacement of the reinforced concrete beam 3 or the reinforced concrete floor 2 occurs , the longitudinal stress bars 4 in the reinforced concrete beam 3 or the stressed bars 7 in the reinforced concrete floor 2 and the steel strands 5 embedded in the reinforced concrete beam 3 or the reinforced concrete floor 2 produce axial deformation due to axial deformation. pull. Due to the high strength of the steel strand 5, it can provide a large axial tension, that is, provide a large suspension force for the remaining reinforcement structure after the failure of the vertical load-bearing member, thereby effectively preventing the continuous collapse of the reinforcement structure.

What needs to be understood here is that the vertical direction refers to the direction of the building perpendicular to the earth under normal conditions. In the description of the embodiments of the present invention, the vertical direction is the up-down direction, and the "up-down direction" is shown by the arrow in FIG. 2 , for example. Among them, the vertical load-bearing components are, for example, load-bearing walls and load-bearing columns in the existing concrete structure.

Therefore, according to the reinforcement structure of the embodiment of the present invention, by embedding the steel strand 5 inside the reinforced concrete beam 3 or the reinforced concrete floor 2, when the existing concrete structure is subject to accidental loads (explosion, impact, fire, earthquake, etc.), the steel The stranded wire 5 can play the role of a suspension cable when the reinforced concrete beam 3 or the reinforced concrete floor 2 that loses vertical support produces a large vertical displacement, providing it with a suspension force to prevent the existing concrete structure from collapsing.

Specifically, as shown in Figure 1, in some embodiments of the present utility model, for example, the two ends of the steel strand 5 can be anchored on both sides of the reinforced concrete beam 3 or the reinforced concrete floor 2 using the steel strand end anchors 8. On the vertical load-bearing member 9 on the side (ie reinforced concrete column or shear wall), the two ends of the steel strand 5 can also be anchored on the reinforced concrete beam 3 or the reinforced concrete beam on both sides of the reinforced concrete floor 2.

Advantageously, the steel strands 5 are anchored to the outermost columns or walls of the building. At this time, the length of the steel strand 5 is the longest, and the force of the steel strand 5 spans the length or width of the entire building. In this way, after the building is subjected to accidental loads, it can more effectively prevent the existing concrete structure from continuing. A collapse occurs.

Optionally, the steel strand 5 can be embedded in the upper protective layer of the reinforced concrete beam 3 or the reinforced concrete floor 2 , and can also be arranged in the lower protective layer of the reinforced concrete beam 3 or the reinforced concrete floor 2 . Advantageously, the steel strands 5 can be embedded in the upper and lower protective layers of the reinforced concrete beam 3 or the reinforced concrete floor 2 at the same time.

In some examples of the present utility model, as shown in Fig. 1 and Fig. 2, the reinforced concrete beam 3 or the reinforced concrete floor 2 can be provided with a slot 6, and the steel strand 5 is arranged in the slot 6, that is, it can be Corresponding parts of the existing concrete structure are provided with slots 6 .

Specifically, the slot 6 is provided in the protective layer 1 of the reinforced concrete beam 3 or the reinforced concrete floor 2 . This facilitates construction.

In some embodiments of the present invention, the steel strand 5 is arranged in the slot 6 and then grouted into the slot 6 to embed the steel strand 5 in the reinforced concrete beam 3 or the reinforced concrete floor 2 . Thus, after the steel strand 5 is buried in the reinforced concrete beam 3 or the reinforced concrete floor 2, the groove 6 can be formed into a unified whole with other positions of the reinforced concrete beam 3 or the reinforced concrete floor 2 after grouting and hardening

Preferably, before the steel strand 5 is embedded, certain anti-corrosion treatment is performed on the steel strand 5 , for example, an anti-corrosion paint can be coated on the steel strand 5 . This can play an effective anti-corrosion effect on the steel strand 5, avoiding the steel strand 5 from being corroded after long-time use, which can reduce the possibility that the steel strand 5 is damaged due to corrosion, and prolong the service life of the steel strand 5. service life.

The reinforced structure according to the utility model can improve the continuous collapse resistance of the existing concrete structure.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (6)

1. An existing concrete structure anti-continuous collapse reinforcement structure is characterized in that steel strands are embedded inside the reinforced concrete beams or floor slabs of existing concrete structures and the two ends of the steel strands are respectively anchored to the existing There is a concrete structure on it. 2 . The reinforced structure for resisting progressive collapse of an existing concrete structure according to claim 1 , wherein the reinforced concrete beam or floor is provided with slots, and the steel strands are arranged in the slots. 3 . 3. The reinforced structure for resisting progressive collapse of existing concrete structures according to claim 2, characterized in that, the slots are arranged in the protective layer of the reinforced concrete beams or floors. 4. The existing concrete structure anti-continuous collapse reinforcement structure according to claim 3, characterized in that, the steel strands are arranged in the slots and then grouted in the slots so that the steel strands The wires are embedded in the reinforced concrete beams or slabs. 5. The existing concrete structure anti-continuous collapse reinforcement structure according to claim 1, characterized in that, the two ends of the steel strand are respectively anchored to the vertical load-bearing members or the two sides of the reinforced concrete beam or floor slab on reinforced concrete beams. 6. The existing concrete structure anti-continuous collapse reinforcement structure according to claim 1, characterized in that, the steel strands are coated with anti-corrosion paint.

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