CN112012400A

CN112012400A - Rectangular octagonal combined spiral hoop and reinforced concrete column applying same

Info

Publication number: CN112012400A
Application number: CN202010830906.1A
Authority: CN
Inventors: 周建龙; 徐浩; 邱介尧; 包联进; 钱鹏
Original assignee: East China Architectural Design and Research Institute Co Ltd
Current assignee: East China Architectural Design and Research Institute Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-12-01

Abstract

The invention belongs to a rectangular octagonal combined spiral hoop in the technical field of structural engineering and a reinforced concrete column applied by the same, and the technical scheme is as follows: the utility model provides a shape that rectangle octagon combination spiral hoop, single reinforcing bar spiral continuous processing form multiturn stirrup, every circle by octagon stirrup and rectangle stirrup interval arrangement, octagon stirrup be the shape that forms behind the shape excision four corners of rectangle stirrup. The concrete column uses a rectangular octagonal combined spiral hoop as a stirrup, and the number of main reinforcements on each side of the column is 4-7 under the condition of not adding a tie short stirrup. The concrete column member has the advantages of improving the stress performance and the easy processing performance of the concrete column member and widening the application range under the condition of not supplementing additional tie short stirrups.

Description

Rectangular octagonal combined spiral hoop and reinforced concrete column applying same

Technical Field

The invention relates to the technical field of structural engineering, in particular to a stirrup and a column applying the stirrup.

Background

With the development of the times, the construction industry puts forward more requirements on the aspects of product processing precision, efficiency, energy consumption control, labor saving and the like. Through the reformation and the opening of a large amount of construction for decades, the urbanization level of China is greatly developed, and the existing construction is more likely to be updated and expanded in a busy city area. The construction site is greatly limited, and the external processing proportion needs to be enlarged as much as possible. Meanwhile, with the increase of income and living standard of the masses, the increase of field labor cost and aging condition are increasingly prominent, and the field operation efficiency and the progress are required to be improved in the construction process. The existing precast concrete system solves part of problems, but the whole precast concrete component also brings new problems of large mass, easy damage, difficult connection and the like. Even if the construction period is not so dominant, the advanced design stage needs to be added. The building design is also limited by the modulus of the components.

Therefore, under the condition that the prefabrication benefits of certain integral concrete components are not high, the idea of improving the design and construction level of the industry by improving the processing efficiency and quality of the reinforcing steel bars is provided for the building industry. Aiming at square and rectangular column components, the existing high-efficiency stirrup processing mode mainly comprises a continuous spiral hoop around the column edge and a cross-shaped one-stroke hoop. These forms of stirrup have their own characteristics and also have corresponding disadvantages. Each turn of the groined-shaped pen hoop needs 12 90-degree bends, so that the bending energy consumption is high, the integral rotary displacement is large, and continuous spiral production is difficult to form. The traditional continuous spiral hoop around the column edge has no lateral tie at the corner, and the column section is slightly larger, so that a short tie stirrup needs to be added at the later stage, and the requirement on the artificial participation degree is higher. The stirrup forms have the condition that the area of the center of the section of the column, which is not penetrated by the stirrup, is small, the bearing capacity cannot be greatly improved by accommodating large steel bones to form the steel reinforced concrete column, and the application range is limited to a certain extent.

In summary, the existing stirrup form has one or more directional lifting spaces in the aspects of stress performance, application range, processing efficiency and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a rectangular octagonal combined spiral hoop and a reinforced concrete column using the same, which improve the stress performance and the easy processing performance of concrete column members and widen the application range under the condition of not supplementing additional tie short stirrups.

The technical scheme of the invention is as follows: the utility model provides a shape that rectangle octagon combination spiral hoop, single reinforcing bar spiral continuous processing form multiturn stirrup, and each circle is arranged by octagon stirrup and rectangle stirrup interval, and the shape of octagon stirrup is the shape that forms after the shape excision four corners of rectangle stirrup.

Based on the technical characteristics, the concrete column takes a rectangular octagonal combined spiral hoop as a stirrup, and the number of main reinforcements on each side of the column is 4-7 under the condition of not adding a tie short stirrup.

Based on the technical characteristics, the column core in the octagonal hoop is provided with the steel rib.

The invention has the beneficial effects that:

1. the section area of the column core concrete part surrounded by the rectangular octagonal combined spiral hoop is larger, and the bearing capacity and ductility of the column can be improved better according to the stress characteristics of the concrete column.

2. When the surrounding effect is improved, the area of the middle part of the rectangular octagonal rechecking stirrup without the stirrup penetrating through the part is larger than that of a common stirrup, steel ribs with larger sizes can be accommodated, and the steel reinforced concrete column with higher bearing capacity is formed.

3. Creating 2 lateral tie nodes at each column edge. Due to the current structural specification requirements, the main ribs on the sides of the column are provided with lateral ties at least every other main rib and have the requirement of the minimum spacing of the main ribs. Therefore, compared with the traditional well-shaped one-stroke hoop and the continuous spiral hoop around the column edge, the hoop can support more column longitudinal main ribs and larger column edge length under the conditions of not supplementing and tying short hoops and one-step forming continuous hoops. Therefore, the application range and the forming efficiency of the reinforcement cage can be greatly improved.

4. This stirrup form volume of buckling is little, and most dog-ear is the obtuse angle and buckles (8 obtuse angles add 4 90 angles for every circle stirrup totally), compares a well style of calligraphy hoop (12 90 angles for every circle stirrup totally) that supports same main muscle quantity, and the volume of buckling is little when adding man-hour, and the whole rotary motion of stirrup is little, and the processing energy consumption is little, and process velocity is fast, realizes continuous spiral hoop machining more easily.

Drawings

Fig. 1 is a schematic plan view of a prior art continuous spiral hoop around the column edge.

Fig. 2 is a schematic view of a prior art arrangement of reinforcing bars around a column edge continuous spiral hoop.

Fig. 3 is a schematic plan view of a well-shaped pen collar in the prior art.

Fig. 4 is a schematic view illustrating bending of a reinforcing bar of a well-shaped pen hoop in the prior art.

Fig. 5 is a perspective view of the rectangular octagonal combined spiral hoop of the present invention.

Fig. 6 is a schematic view of the bending of the steel bar in the rectangular octagonal combined spiral hoop.

Fig. 7 is a sectional view of the reinforced concrete column of the present invention.

The graphical representation is: a rectangular octagonal combined spiral hoop 1; a main rib 2; a steel skeleton 3; a concrete column 4; a well-shaped pen hoop 5; the short stirrups 6 are tied; a helical hoop 7 is continuous around the column edge.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The concrete column 4 with the same section size and the column edge main reinforcements 2 with the same number are used for respectively describing the continuous spiral hoop around the column edge, the cross-shaped one-pen hoop and the rectangular octagonal combined spiral hoop.

As shown in fig. 1 and 2, for the concrete column 4 with the same cross-sectional dimension, when the column-side main reinforcement 2 is 7 reinforcing steel bars, according to the arrangement requirement of the existing structural specification on the column-side main reinforcement, two tie short stirrups 6 are required to be added vertically and horizontally to form the transverse constraint on the column main reinforcement 2 together with the continuous spiral stirrup 7 around the column side.

As shown in fig. 3 and 4, for the concrete column 4 with the same cross-sectional size, when the column edge main reinforcement 2 is 7 reinforcing steel bars, and when the # -shaped one-pen hoop 5 is adopted, as shown in fig. 4, each turn of the hoop has 12 90-degree angles.

As shown in fig. 5, the rectangular octagonal combined spiral hoop is formed by continuously processing a single steel bar, each turn of the rectangular octagonal combined spiral hoop is arranged by an octagonal stirrup and a rectangular stirrup at intervals, and the shape of the octagonal stirrup is the shape formed by cutting four corners of the rectangular stirrup.

As shown in fig. 6 and 7, for the concrete column 4 with the same cross-sectional size, when the column-side main reinforcements 2 are 7 reinforcing steel bars, each turn of the rectangular octagonal combined spiral hoop 1 has 8 obtuse angles plus 4 90 degrees, which is 360 degrees less than the total bending angle of the # -shaped one-pen hoop, and accounts for 1/3 degrees of the total bending amount. The spiral hoop machining device has the advantages of small bending amount, small integral rotation displacement of the hooping, low machining energy consumption, high machining speed and easy realization of continuous spiral hoop machining during machining. And by adopting the rectangular octagonal combined spiral hoop, when the number of the main reinforcements 2 at the column side is in the range of 4-7, no additional post-tensioned short hooping is needed, and the sectional area of the column core part is greatly increased. The diagonal line hatching shown in fig. 6 and 3 indicates the pillar core portion, and the hatched area of fig. 6 is about 4.2 times the hatched area of fig. 3. Thus, a larger steel skeleton 3 can be arranged in the concrete column 4, and the bearing capacity of the whole concrete column 4 can be improved.

The rectangle in the rectangular octagon combined spiral hoop comprises a square, and the octagon comprises a regular octagon.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rectangle octagon combination spiral hoop which characterized in that: the single steel bar is spirally and continuously processed to form a plurality of turns of stirrups, each turn of stirrups is formed by arranging octagonal stirrups and rectangular stirrups at intervals, and the octagonal stirrups are in shapes formed by cutting four corners of the rectangular stirrups.

2. The utility model provides an use reinforced concrete column of rectangle octagon combination spiral hoop which characterized in that: the concrete column (4) is hooped by a rectangular octagonal combined spiral hoop as claimed in claim 1, and the number of main reinforcements on each side of the column is 4-7 without additionally arranging a tie short hoop.

3. The reinforced concrete column using the rectangular octagonal combined spiral hoops as claimed in claim 2, wherein: and the column core in the octagonal stirrup is provided with a steel rib (3).