JP4288665B2 - Band and stirrup made of round and round T-shaped section steel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the construction of civil engineering and architectural structures, the present invention relates to a reinforcing bar column, a girder used for beam reinforcement, a cross-sectional shape of a cross-section steel material, and a monolithic band using this shape steel material. , Concerning the production and use of stirrup
[Prior art]
Conventionally, band bars and stirrups used in rebar construction for civil engineering, architectural reinforced concrete structures, steel reinforced concrete structures, etc., are mostly constructed by processing and manufacturing atypical rebars by the cold method.
[0003]
[Problems to be solved by the invention]
Because the strength of the bending part of the band and ribs using atypical reinforcing bars is reduced by the cold construction method of the bender, the deterioration of the steel and concrete due to the earthquake and the passage of time (rust of the steel) Insufficient yield strength may be generated against breakage or cracks in steel materials due to the occurrence of cracks, cracks, fractures, etc. caused by the occurrence of chemical reactions or the chemical reaction of concrete, and the stability of the structure is impaired.
[0004]
In atypical reinforcing bars, when the compressive force is generated in the concrete, the central part of the stirrup and stirrups is weak against bending, and may not be able to cope with bending against the stress of the main bars.
[0005]
By using the stirrups and stirrups of the present invention, the above-mentioned drawbacks are sought by increasing the strength and compensating the proof stress as compared with the conventional method.
[0006]
[Means for Solving the Problems]
In the present invention, strength is improved by making the stirrup and stirrup made of a deformed reinforcing bar with a steel material having a T-shaped cross section.
[0007]
In order to improve the strength of the bending corner, the product has a four-sided closed structure, and the basic manufacturing method is the hot rolling method, which improves the decrease in the strength of the bending corner compared to the conventional method. .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The cross section of the shape steel material used for the band stirrup and the stirrup was T-shaped so that the protruding corners of the cross section were rounded and the inset corners were rounded so that they could easily blend in with the concrete.
[0009]
A four-sided closed type with an integrated manufacturing method prevents the corners from being lowered due to bending.
[0010]
The manufacturing method is based on a hot rolling method, but it is also possible to use joints, etc., such as welding, a gas pressure welding method, and a bolt connection method, etc. in part on site.
[0011]
【Example】
An embodiment will be described below with reference to the accompanying drawings. As shown in FIG. 1, the shape steel used for the stirrup and stirrup has a rounded T-shaped cross section.
As shown in Fig. 1 (a), the steel with a rounded round T-shaped cross section has a round chamfered corner as shown in Fig. 1 (b) and rounded corners as shown in Fig. 1 (b). The density of the concrete frame is increased by smoothing the flow of steel, and the shape is such that no gaps are likely to form around the steel. [0013]
The manufacturing method is based on the hot rolling method (and may be used in combination with other manufacturing methods) and has a four-way closed integrated structure.
Since the four-way closed type described in the previous section may cause inconvenience in construction on site, products such as two-part products are also manufactured, and a welding method, a gas pressure welding method, or the like may be used at the time of on-site construction. It can also be constructed by connecting with bolts etc.
The embodiment of the present invention has the above-described configuration, and the cross-sectional shape of the steel bars used for assembling the column reinforcement of the rebar construction and the rib reinforcement used for the rebar construction in the construction of civil engineering and construction, and the construction and production thereof. Processing [0016]
【The invention's effect】
As described above, the stirrup and stirrup using the round steel T-shaped section steel material of the present invention is advantageous in the following points as compared with the conventional processing of deformed reinforcing bars. (B) Improves yield strength against breakage and fracture of steel due to expansion and degradation of concrete due to concrete chemical reaction, etc. ( C) Expected to improve the proof stress against various stresses applied to structures such as earthquakes [Brief description of the drawings]
FIG. 1 is a cross-sectional view of a section steel material having a rounded T-shaped cross section according to the present invention. FIG. 2 is a plan view of a four-way closed strip and stirrup integrally manufactured by a hot rolling method. Side view of four-way closure type stirrup and stirrup integrally manufactured by the construction method. [FIG. 4] Plan view of FIG. 2 divided into two parts. [FIG. 5] Assembly correlation diagram of steel material of the present invention and column bars and beam bars. 6] Assembly correlation diagram of the steel material of the present invention and column reinforcement and beam reinforcement. [Fig. 7] Plan view of engagement with a string stop hoop (diahoop) at the time of band reinforcement assembly. [Fig. Cross section with diamond hoop) [Explanation of symbols]
B Round corner T-shaped cross-section steel section corner B Round corner T-shaped cross section steel corner 1 Corner steel T-section section steel 2 Column main bar and beam main bar 3 Steel receiving material 4 Drawstring (diamond hoop)

Claims (3)

Shaped steel with a T-shaped cross section of the steel bars of the stirrups of the columns and the stirrups of the beams used in the rebar construction in the construction of civil engineering structures     A shape steel material having a rounded T-shaped cross-section with chamfered corners of the projecting corner portion of the shaped steel material described in claim 1 on an outer round surface and a chamfered corner portion.     A monolithic four-way closure type stirrup and stirrup manufactured by the shaped steel described in claim 1 or 2.

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