JPH0452355A - Rc pole and src pole of cruciform cross section - Google Patents

Abstract

PURPOSE:To prevent cracking due to shear, buckling of each main reinforcing bar and expansion of concrete by disposing main reinforcing bars near the outside corner portions of each projecting portion and near that side of a center rectangular portion which is opposite to a lower projecting portion, and disposing a band reinforcing bar around each main reinforcing bar. CONSTITUTION:Main reinforcing bars 11a, 11b each made by an iron bar for normal reinforcement are disposed near the outside corner portions of each projecting portion S1,S2, S3 and a main reinforcing bar 11a is also disposed in a portion opposite to that portion of a center rectangular portion R which is connected to the lower projecting portion S1. A rectangular band reinforcing bar 12a is disposed outside each main reinforcing bar 11a while in contact therewith. Further a rectangular band reinforcing bar 12b is disposed outside each main reinforcing bar 11b while in contact therewith. The rectangular band reinforcing bars 12a, 12b are each formed by bending of a long iron bar or connection of shortly cut iron bars to each other. Connection of the iron bars constituting the band reinforcing bars 12a, 12b is carried out using a normal connecting means such as welding, mechanical joint, lap joint etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides RC columns and SRC columns with T-shaped cross sections;
Particularly related to RC columns and SRC columns with single-shaped cross sections that include column main reinforcement and stirrups that enhance the restraining force of concrete. Most of the structural columns (referred to as SRC columns in this specification) have a rectangular or circular cross section.

For example, the arrangement of the main reinforcement 1° band reinforcement 2 and the connecting reinforcement 3 of an RC column with a rectangular or circular cross section is as shown in FIGS. 30 and 31. Examples of the arrangement of the steel frame 3, main reinforcement 1, and tie reinforcement 2 of the column are as shown in FIGS. 32 and 33. The mechanical performance of these RC columns and SRC columns with square or circular cross sections has been fully elucidated through numerous experiments.

When constructing a building using columns with a square or circular cross section, the thickness of the wall that is formed integrally with the square or circular column is generally determined to be less than the length of one side of the square or the diameter of the circle. Because they are made smaller, the right-angled corners of square columns and the arcs of circular columns protrude into the corners of the room space, and these protrusions impede effective use of the room space. Therefore, there is a proposal to make the cross section of the pillar T-shaped.

Problems to be Solved by the Invention Since the bending moment generated in a column changes depending on the direction of horizontal load, the shape of the cross section of the column is symmetrical, square,
The overwhelming majority of columns are rectangular or circular, and the main reinforcements 1 are also arranged symmetrically with respect to the center of gravity axis of the column, and the tie bars 2 are arranged around the main reinforcements 1.

The tie reinforcement 1 has the function of preventing cracks due to shear force, and the main reinforcement 1
The function of preventing concrete from buckling, preventing extrusion of concrete, and ensuring stickiness is required.
In order to fulfill the above function, in conventional RC columns and SRC columns with a rectangular or circular cross section, for example, the 30th
The shape and arrangement as shown in Figures 33 to 33 are adopted.

However, even though it has been proposed to use RC columns and SRC columns with a T-shaped cross section for the purpose of making effective use of room space, the main bars and tie bars for the RC columns and SRC columns with a T-shaped cross section are The shape and arrangement of steel frames, etc., are still not fully understood. Therefore, RC columns and SRC columns with T-shaped cross sections are hardly ever put into practical use.

The problem to be solved by this invention is to provide RC columns and SRC columns with a T-shaped cross section that have sufficient functions as columns. To provide an RC column and an SRC column having a T-shaped cross section, which can prevent concrete from extruding.

Means for Solving the Problems The present invention employs the following configuration as a means for solving the problems described above.

The structure of the present invention is an RC column having a T-shaped cross section, including main reinforcements and tie reinforcements, and consisting of a central rectangular part and rectangular left, right, and lower protruding parts that protrude from the central rectangular part. , a main reinforcement is arranged near the outer corner of each protrusion, and a main reinforcement is arranged near the side of the central rectangular part on the side opposite to the lower protrusion, facing the main reinforcement arranged on the lower protrusion. A first tie reinforcement is arranged around the main reinforcing bars arranged in the lower protruding part and the central rectangular part, and the main reinforcing bars are arranged in the left protruding part and the right protruding part. The RC column has a T-shaped cross section and is characterized in that a second tie reinforcement is provided around the main reinforcement provided in the section.

In a preferred embodiment, the first ties and the second ties are rectangular. These hoops are made by joining the ends of reinforcing bars bent into a rectangular shape, but they are also made by connecting reinforcing bars into a rectangular shape and connecting the middle part with connecting reinforcing bars etc. in a lattice shape. You may use it. The first strap and the 20th strap are arranged to intersect each other at a substantially right angle.

If necessary, main reinforcing bars are provided at the inner corners of the intersections of the first and second straps in plan view in the lower protrusion side portion of the central rectangular portion.

A reinforcing bar that is effective against axial force is placed in the center or near the center of the square part surrounded by the first stirrup and the second stirrup of the central rectangular part in a plan view, and extends in the longitudinal direction of the column. be located and arranged.

A main reinforcement is provided at each corner of a rectangle in a plan view in the left protrusion, right protrusion, and lower protrusion of the T-shaped RC column, and rectangular reinforcing bars are provided around each of the main reinforcements. do.

In addition, if necessary, reinforcing bars, cage-shaped reinforcing bars, and reinforcing bars may be buried in the areas surrounded by rectangular reinforcing bars, the first ties, and the second ties. The body etc. are arranged to extend in the longitudinal direction of the column.

In some cases, reinforcing bars are provided in the cross section of a T-shaped RC column at an angle to the center line of the T-shaped RC column to withstand high axial force.

Further, the configuration of the present invention includes a T-shaped steel frame, main reinforcement, and tie reinforcement, and includes a central rectangular portion, a rectangular left side protrusion, a right side protrusion, and a lower side protrusion that protrude from the central rectangular portion. In the SRC column with a T-shaped cross section, main bars are provided near the outer corners of each protrusion, and a main reinforcement is provided near the side opposite to the lower protrusion of the central rectangular part. Main reinforcing bars are arranged opposite to the main reinforcing bars arranged on the side protrusions, and through holes are made in each web of the T-shaped steel frame, and each main reinforcing bar is arranged on the lower protruding part and the central rectangular part. A first strap is provided around the through-hole through the through-hole, and a second strap is provided through the through-hole around the main reinforcement provided on the left side protrusion and the main reinforcement placed on the right side protrusion. The SRC column has a T-shaped cross section, which is characterized by the arrangement of stirrups.

In the case of a T-shaped SRC column, if necessary, the inner corner of the intersection of the first stirrup and the second stirrup in plan view in the lower protrusion side part of the central rectangular part Main reinforcing bars are placed around each main reinforcing bar placed at the corner of a rectangle in plan view within each protruding portion of a T-shaped SRC column.

The T-shaped steel frame of the T-shaped SRC column is H-shaped steel and T-shaped steel.
It may be manufactured using shaped steel, or it may be assembled using L-shaped steel, steel plates, etc.

A plurality of through holes for passing the stirrups are made at predetermined positions in the three webs of the T-shaped steel frame.

A reinforcing reinforcing bar is installed between the side surface of the T-shaped steel web and the main reinforcing bar placed inside the corner of the square part surrounded by the first stir bar and the second stir bar in plan view. Arranged diagonally to increase the restraining integrity of the concrete and enable it to withstand high axial forces.

The cruciform cross-section RC columns and SRC columns of this invention may be formed by casting in place or by precasting.

Examples RC columns and SRC columns with T-shaped cross sections of this invention are:
For example, it is used as a T-shaped pillar C1 of a building with a pillar arrangement as shown in FIG.

The cross-sectional shape of the T-shaped column C1 is as shown in FIG.
The center line P1 of one rectangle P is the center line Q1 of the other rectangle Q
The two rectangles are arranged so that they intersect each other at right angles approximately at the center thereof, and the side P2 of one rectangle P that is perpendicular to the center line P1 coincides with the side Q2 of the other rectangle Q that is parallel to the center line Q1. When the rectangles P and Q are overlapped, the T-shaped shape is formed by combining the two rectangles P and Q, that is, the central rectangular portion R1, the lower protrusion S1, the left protrusion S2, and the right protrusion S3. Match the shape consisting of. two rectangles P,
The length of the long side and short side of Q shall be determined as appropriate depending on the building etc. to be constructed.

An RCCl2O embodiment of the present invention will be explained using FIGS. 2 to 22.

The arrangement of the RCCl2O main reinforcement, the shape of the tie reinforcement, the basic form of their arrangement, etc. are shown in FIGS. 2 to 12.

The basic model shown in FIG. 2 has a main bar 11a of an ordinary reinforcing bar near the outer corner of each protruding portion S1, S2, and S3.
At the same time, the main reinforcement 11 is also provided in the part opposite to the part connected to the lower protruding part S1 of the central rectangular part R.
Place a. Main bars 11a, llb and main bars 11a, ll
An appropriate number of main reinforcing bars 11c are also provided between the main reinforcing bars 11c and the main reinforcing bars 11c as necessary.

Then, a rectangular strap 12a is arranged on the outside of each main reinforcement 11a and in contact with these. Further, a rectangular strap 12b is arranged on the outside of each main reinforcement 11b and in contact with these. Strap 12
An appropriate number of main reinforcing bars are also arranged inside the rectangular straps 12a and 12b between the intersection 13 of the main reinforcing bars 11a and llb and the main reinforcing bars 11a and 12b, as necessary.

The rectangular ties 12a and 12b are used to bend long iron bars,
It is formed by connecting short iron rods. Strap 12a
, 12b are connected by ordinary connection means such as welding, mechanical joints, lap joints, etc.

In addition, the main reinforcements 11a, llb, llc and the tie reinforcements 12a,
In addition to ordinary reinforcing bars, the material for 12b is P.
C-wire rods, high-tensile fibers, or a combination of these can also be used.

The basic type shown in Fig. 3 is an L-shaped #11d instead of the main bars 11a and llb of the ordinary reinforcing bars of the type shown in Fig. 2.
, lie is used. In addition to L-shaped steel,
T-shaped steel, H-shaped steel, channel steel, etc. can also be used.

The basic mold shown in FIG. 4 has a strap 12a in the lower protruding portion Sl side of the central rectangular portion R of the basic mold shown in FIG.
, 12b, a main reinforcement 11f is added to the inner corner of the intersection 13.

The basic type shown in FIG. 5 is the basic type of tie bar 12 shown in FIG.
A reinforcing bar IIg, which is effective against axial force, is arranged in the center of the rectangular portion surrounded by the reinforcing bars 12b and the reinforcing bars 12b, extending in the longitudinal direction of the column. As the reinforcing bars 11g, L-shaped steel, T-shaped steel, H-shaped steel, channel steel, PC steel bars, high-tensile fibers, etc. may be used.

The basic type shown in FIG. 6 is similar to the basic type shown in FIG.
In the rectangular part surrounded by a and the ties 12b,
A small rectangle is assumed, and L-shaped steel 11h, which is effective against axial force, is placed at the corner of the assumed rectangle, extending in the longitudinal direction of the column.

Instead of L-shaped steel 11, T-shaped steel, H-shaped steel, channel steel, PC
Steel rods, high tensile strength fibers, etc. can also be used.

In the basic form shown in Figures 2 to 6, the ties 12a, 1
2b are arranged at intervals in the longitudinal direction of the column around the main reinforcements 11a, llb, llc, etc. extending in the longitudinal direction of the column, as shown in FIG.

However, the straps 12a and 12b may be arranged in an overlapping manner.

The basic model shown in FIG. 8 includes a lower protrusion S1, a left protrusion S
This type is adopted when it is desired to intensively reinforce the parts 2 and the right side protrusion 83, etc., and main reinforcements 11a, llb, 11c, and lli are arranged at the corners of the assumed rectangle of each protrusion, and around these main reinforcements. , reinforcing bars 12c made of rectangular iron bars, etc.
In some cases, the main reinforcements 11a, llc, and lli are arranged at the corners of the rectangle assumed there also in the part opposite to the lower protruding part S1 of the central rectangular part R, and A reinforcing strip 12c made of a rectangular iron bar or the like is arranged around the reinforcing bar 12c.

The tie bars 12c are arranged at intervals in the longitudinal direction of the column. This basic type is rarely used alone, and is usually used in combination with the basic types shown in FIGS. 2 to 6.

The basic types shown in FIGS. 2-6 and 8 may be used in combination. FIG. 9 shows an example in which the basic type shown in FIG. 2 and the basic type shown in FIG. 8 are combined. In this applied type, as shown in FIG. 10, the stirrups 12a and the stirrups 12b are arranged at intervals in the longitudinal direction of the column, and between the stirrups 12a and the stirrups 12b A tie bar 12c is arranged between the bar and the tie bar 12b.

The basic model shown in Figs. 11 and 12 is adopted in the basic model shown in Figs. 2 to 6, but in order to increase the restraint integrity of concrete when high axial force is applied, the basic model is installed diagonally within the RC column. A reinforcing bar 14 is inserted in the direction. The mold shown in FIG. 11 is an application of the basic mold shown in FIG.
, llb are arranged, and the bent portions at the ends of the reinforcing bars 14a, 14b are connected to the main bars 11a, llb.
11b. The type shown in FIG. 12 is also an application of the basic type shown in FIG. This is an example in which the bent portions of the reinforcing bars 14c, 14c are applied to each main bar 11f. Reinforcement bars 14a, 14b
, 14c are arranged at intervals in the longitudinal direction of the pillar 10.

The mold shown in FIGS. 13 and 14 is a modification of the mold shown in FIG. 9, and is used to lengthen each of the protrusions S1 to S3. In such a case, if a high axial force is applied and also a large bending stress is applied, a large compressive force will be applied to the portion of the L-shaped column near the end of each of the protrusions S1 to S3. Therefore, reinforcement is required to intensively restrain the concrete near the ends.

In order to strongly restrain the portion closer to the end, the first
Use grid reinforcing bars as shown in Figures 5 to 20.

A lattice-like tie bar used in place of the tie bar 12a is shown in FIGS. 15 to 17. The welding grid 12d shown in FIG. 15 is made by welding the ends of two long iron rods 12d1 and the ends of two short iron rods 12d2 into a rectangular shape, and connects the iron rod 12d3 to one end of the rectangular shape. The ends of the grid are welded to form a welded grid. The lattice-shaped reinforcing bars shown in FIGS. 16(A) and 16(B) are made by overlapping long rectangular ties 12e□ formed by bending an iron bar and short rectangular ties 12e2 formed by bending an iron bar to form a lattice shape. It is connected to The lattice reinforcing bars shown in FIGS. 17(A) and 17(B) are made by hooking the hooks at the ends of the short connecting bars 12f2 to the part from one end of the long rectangular ties 12f1 formed by bending the iron bars. It is made into a grid.

A lattice-like tie bar used in place of the tie bar 12b is shown in FIGS. 18 to 20. The welded grid 12g shown in FIG. 18 is made by welding the ends of two long iron bars 12g□ and the ends of two short iron rods 12g2 into a rectangular shape, and the parts from each end of the rectangular shape. Connect iron bars 12 to each
The ends of g are welded together. The lattice-shaped reinforcing bars shown in FIGS. 19(A) and 19(B) are made by stacking long rectangular reinforcing bars 12h1 formed by bending an iron bar and short rectangular reinforcing bars 12h2 formed by bending an iron bar and joining them in a lattice shape. It is something. The lattice strips shown in FIGS. 20(A) and (B) are
The hooks at the ends of short connecting reinforcing bars 12j2 are hooked onto the ends of long rectangular reinforcing bars 12j1 formed by bending iron bars to form a lattice shape.

The mold shown in FIG. 13 has main reinforcements 11a, 11b,
llc, lli are arranged, and the main reinforcement 11a is placed in the central rectangular part.
llf is arranged, and each main reinforcement 11a, 11c, llf, ll
i a number of welding gratings 1 spaced along their length;
2d, and a large number of welding grids 12g are applied to each main reinforcement 11b, llc, llf, lli at intervals in their longitudinal direction.
It is multiplied by Welding grids 12d and 12g are pillars 10
are arranged at intervals in the longitudinal direction.

The mold shown in FIG. 14 has a portion surrounded by a welded grid 12d that accommodates the main reinforcements 11a, llc, and lli of each protrusion of the mold shown in FIG. 13, and a welded grid 12g that accommodates the main reinforcements 11b, 11c, and A reinforcing reinforcing bar 11g, which is effective against axial force, is provided in the surrounded portion to extend in the longitudinal direction of the column. Examples of the reinforcing bars 11g include ordinary reinforcing bars, PC steel bars, steel pipes, square steel, H-shaped steel,
T-shaped steel, H-shaped steel, channel steel, high tensile strength fibers, etc. are used.

Furthermore, an applied type of RC column is shown in FIGS. 21 and 22, and the one in FIG. 21 includes a portion 15 from the end of the portion surrounded by the ties 12a of the lower protrusion, and the left and right sides. In the portion 15 from both ends of the part surrounded by the straps 12b of the protrusion, brush-shaped reinforcing bars 16 are formed by arranging a large number of main bars 11j on a virtual circle and straps 12k around them, This is what was installed. In FIG. 22, a rod-shaped body 17 made of reinforced concrete and formed by burying reinforcing bars is provided in place of the brush-shaped reinforcing bars 16 in FIG. 21.

Next, an embodiment of the SRC column of the present invention will be described using FIGS. 23 to 28.

The T-shaped shape of the pillar 20 is the same as the T-shaped shape of the RCCl2O embodiment. The column steel frame has a T in the center of the H-shaped steel web.
A 2°A T-shaped steel frame is used, which is made by joining shaped steel.

In the basic type shown in FIG. 23, the arrangement of the main reinforcements 21a and 21b is the same as the arrangement of the main reinforcements 11a and llb in FIG.
, 12b.

As the T-shaped steel frame 2OA, three webs 20A1 are used with through holes 20A1a through which the stirrups 22a and 22b are passed at intervals in the longitudinal direction, and the stirrups 22a
, 22b, at least two portions 22a1.22
It differs from the one shown in FIG. 2 in that it uses a2.22b1.22b2.

Then, one part 12a□, 1 of the ties 22a, 22b
The end of the 2b workpiece is connected to each through hole 20A1a of each web 20A1.
and the other part 2 of the ties 22a, 22b.
The ends of 2a2 and 22b2 are connected by the connecting means 18,
It is assumed that the straps 22a and 22b are integrated.

The basic type shown in FIG. 24 is a main bar 21a with a normal circular cross section.
, 21b, L-shaped steels 21d and 21e are used. In addition, instead of the above-mentioned section steel, T section steel, H section steel
Shaped steel, channel steel, etc. can also be used.

The basic mold shown in FIG. 25 has a structure in which the first strap 22a and the second strap 22b in a plan view on the lower protrusion SJ side of the central rectangular portion R of the basic mold shown in FIG. Main reinforcing bars 21f are added to the inner corners of the intersections.

The basic type shown in FIG. 26 is adopted when it is desired to intensively reinforce the left side protrusion S2, right side protrusion S3, and lower side protrusion S1 of the T-shaped SRC column 20. Main reinforcements 21a, 21b, 21i are arranged at each corner of a rectangle in plan view in S3, and a 1-shaped steel frame 2OA is installed around the main reinforcements 21a, 21b, 21i.
Through hole 20A1b drilled in each sea urchin':l;'20A1
Through.

A rectangular reinforcing strip 22c is provided.

For example, the reinforcing strip 22c is made by passing one end of the reinforcing strip 12c, which is divided into at least two parts, through each through hole 20A1b of each web 20A1, and connecting that end to the other end of the web 20A1 through the coupling means 18. Combine and arrange.

The basic type shown in FIG. 26 is rarely used alone, and is usually used in combination with other basic types.

The basic type shown in Figure 27 is the same as the basic type shown in Figure 23.
This is a combination of the basic type shown in Figure 6. The reinforcing strips 22c are similar to the reinforcing strips 12c shown in FIG.
They are arranged at intervals in the longitudinal direction of the steel frame 20A between the straps 22a and between the straps 22b and the straps 22b.

The basic type shown in Fig. 28 is based on the basic type shown in Fig. 25, and in order to increase the restraint integrity of concrete when high axial force is applied, diagonal reinforcing bars are installed inside the SRC column.
4 & is included.

As the reinforcing bar 24, for example, a dogleg-shaped reinforcing bar 24 having a hook 24a at one end and a straight section 24b at the other end is used.The hook 24a is hung on the main bar 21f, and the straight section 24b is attached to the steel frame 2OA.
The web 20A1 is disposed along the horizontal web 20A1. The straight portion 24b is welded to each web 20A1 as necessary.

As the coupling means 18, conventional means such as welding, joints, and wire binding are used.

In addition, even in the basic type shown in FIGS. 20 to 25, the main reinforcements 21a, 21b and the main reinforcements 21a,
The inside of the straps 12a and 12b between 21b and the strap 1
An appropriate number of main reinforcements are arranged inside the ties 12a and 12b between the intersection 13 of the ties 2a and the ties 12b and the main reinforcements 11a and llb.

Effects of the Invention The RC column of the present invention has main reinforcing bars arranged near the outer corners of the T-shaped left protrusion, right protrusion, and lower protrusion, respectively, and Main reinforcements are arranged near the sides of the central rectangular part, facing the main reinforcements arranged in the lower protrusion, and around the main reinforcements arranged in the lower protrusion and the central rectangular part. Since the first tie reinforcement is arranged and the second tie reinforcement is arranged around the main reinforcement arranged on the left side protrusion and the main reinforcement placed on the right side protrusion, a large shearing force is applied. It also prevents buckling of the main reinforcing bars and prevents concrete from protruding without causing cracks.

When reinforcing bars are placed around the main reinforcement placed at the rectangular corners of the left protrusion, right protrusion, and lower protrusion of a T-shaped RC column in plan view, concrete at each protrusion can be concentrated. When the reinforcing bars are arranged at an angle within the T-shaped RC column, the restraining integrity of the concrete can be increased.

In addition, the SRC column of the present invention has main reinforcements arranged near the outer corners of the left side protrusion, right side protrusion, and lower side protrusion, respectively, and the main reinforcements on the side opposite to the lower side protrusion of the central rectangular part. Main reinforcements are arranged near the sides, facing the main reinforcements arranged in the lower protrusion, and through holes are made in each web of the T-shaped steel frame, and in the lower protrusion and the central rectangular part. A first strap is arranged around each of the main reinforcements arranged through the through hole, and a first strap is arranged around each of the main reinforcements arranged in the left side protrusion and the main reinforcement arranged in the right side protrusion. Since the second tie reinforcements are placed through the concrete, no cracks will occur even if a large shearing force is applied, and the concrete can be completely prevented from protruding.

Reinforcement bars are placed around the main reinforcements placed at the rectangular corners of the left side protrusion, right side protrusion, and upper side protrusion in a plan view of the T-shaped SRC column.

The concrete in each protruding part can be intensively restrained, and it is arranged inside the intersection of the first stirrup and the second stirrup in a plan view of the central rectangular part of the 5-T-shaped SRC column. Placing reinforcing bars between the main bars and the sides of the T-shaped steel web further increases the restraining integrity of the concrete and allows it to withstand high axial forces.

[Brief explanation of the drawing]

1 to 22 show examples of T-shaped RC columns, and are plan views showing the cross-sectional shape of the T-shaped column in FIG.
Figures 2 to 6 are plan views of the basic arrangement of main reinforcements and stirrups, Figure 7 is an elevation view of the main reinforcements and stirrups in Figure 2, and Figure 8 is the basic arrangement of main reinforcements and stirrups. A plan view of the mold, Fig. 9 is a plan view of an applied version of the arrangement of main reinforcements and stirrups, Fig. 10 is an elevational view of the main reinforcements and stirrups in Fig. 9, Fig. 11 and Fig. 1
Figure 2 is a plan view of the basic type of arrangement of main bars, ties and reinforcing bars, Figures 13 and 14 are plan views of other applied types, and Figure 1
5 and 18 are plan views of the welding grid, and FIG. 16 (A
) and (B) and Fig. 19 (A) and (B) are plan views of rectangular reinforcing bars for making lattice reinforcing bars, Fig. 17 (A) and (B) and Fig. 20 (A) and (B) are A plan view of rectangular reinforcing bars and connecting reinforcing bars that create lattice bars, Figs. 21 and 22 are plan views of other applied types, and Figs. 23 to 28 show examples of T-shaped SRC columns. So, the second
Figures 3 to 26 are basic plan views of the arrangement of steel frames, main reinforcements, and stirrups; Figure 27 is a plan view of an applied arrangement of steel frames, main reinforcements, and stirrups; Figure 28 is a plan view of the steel frames, main reinforcements, and ties. Fig. 29 is a schematic plan view of a building using T-shaped RC columns or SRC columns, and Figs. 30 and 31 are the main reinforcement and reinforcing bars of conventional RC columns. The plan view of the arrangement of the stirrup bars, Figures 32 and 33 are of the conventional SR.
FIG. 3 is a plan view of the arrangement of main reinforcements and tie reinforcements of the C column. In the figure, 10 is an RC column, lla to 1iC511f, 1
1i, 21a to 21c, 21f and 21i are main reinforcements, 11g is reinforcing bars, llh is L-shaped steel, 12a, 12b, 2
2a and 22b are stirrups, 12c and 22c are reinforcing stirrups, 13 is an intersection, 14a, 14b, 14c and 24
16 is a reinforcing bar, 16 is a cage-shaped reinforcing bar, 17 is a reinforced concrete bar, 18 is a connecting means, 20 is an SRC column, 20A
20A1a and 20A1b are through holes, R is a central rectangular portion, Sl is a lower protrusion, S2 is a left side protrusion, and S3 is a right side protrusion. Patent applicant: Takenaka Corporation

Claims (1)

[Claims] 1. RC of a T-shaped cross section, including main reinforcement and tie reinforcement, and consisting of a central rectangular portion and rectangular left, right, and lower protruding portions that protrude from the central rectangular portion. In the column, a main reinforcement is provided near the outer corner of each protrusion, and the main reinforcement provided on the lower protrusion is placed near the side of the central rectangular portion on the opposite side of the lower protrusion. Main reinforcements are arranged to face each other, first tie reinforcements are arranged around the main reinforcements arranged in the lower protrusion and the central rectangular part, and first tie reinforcements are arranged around the main reinforcements arranged in the left protrusion and An RC column with a T-shaped cross section, characterized in that a second tie reinforcement is arranged around the main reinforcement arranged on the right side protrusion. 2. The main reinforcement is arranged at the inner corner of the intersection of the first stirrup and the second stirrup in plan view in the lower protrusion side portion of the central rectangular portion. T according to claim 1
RC column with letter-shaped cross section. 3. A reinforcing bar that is effective against axial force is installed in the longitudinal direction of the column at or near the center of the square part surrounded by the first tie bar and the second tie bar of the central rectangular part in plan view. The RC column with a T-shaped cross section according to claim 1 or 2, characterized in that the RC column is arranged in an extended manner. 4. Main reinforcing bars are provided at each corner of a rectangle in plan view in the left protruding part, right protruding part, and lower protruding part of the T-shaped RC column, and reinforcing bars are provided around each of the main reinforcing bars. 4. An RC column with a T-shaped cross section according to any one of claims 1 to 3. 5. A main reinforcement is arranged at each corner of a quadrangular shape in a plan view on the side opposite to the lower protrusion of the central rectangular part,
The RC column with a T-shaped cross section according to any one of claims 1 to 4, characterized in that reinforcing bars are arranged around the main reinforcement. 6. The RC column with a T-shaped cross section according to claim 4 or 5, wherein the first stirrup and reinforcing stirrup and the second stirrup and reinforcing stirrup are constituted by lattice reinforcing bars. . 7. Reinforcing bars, etc. are arranged extending in the longitudinal direction of the column within the part surrounded by the reinforcing bars or the square part surrounded by the first ties and the second ties. An RC column with a T-shaped cross section according to any one of claims 4 to 6. 8. Claim 1, characterized in that reinforcing bars are arranged in the T-shaped RC column at an angle with respect to the center line of the T-shape.
R of the T-shaped cross section described in any one of items 7 to 7
C pillar. 9. A T-shaped steel frame including a T-shaped steel frame, main reinforcing bars, and tie bars, and consisting of a central rectangular part, and a rectangular left protruding part, right protruding part, and lower protruding part that protrude from the central rectangular part. In the cross-sectional SRC column, main reinforcements are arranged near the outer corners of each protrusion, and main reinforcements are arranged near the lower protrusion of the central rectangular part on the side opposite to the lower protrusion. Main reinforcing bars are provided opposite to the main reinforcing bars provided, and through holes are bored in each web of the T-shaped steel frame. A first strap is provided through the through hole, and a second strap is provided through the through hole around the main reinforcement provided on the left side protrusion and the main reinforcement provided on the right side protrusion. An SRC column with a T-shaped cross section. 10. The main reinforcement is arranged at the inner corner of the intersection of the first stirrup and the second stirrup in plan view in the lower protruding portion side of the central rectangular portion. The T-shaped cross-section SRC column according to claim 9. 11. Main reinforcements are arranged at each corner of a rectangle in plan view in the left protrusion, right protrusion, and lower protrusion of the T-shaped SRC column, and around the main reinforcements arranged at each corner of the rectangle. The SR of the T-shaped cross section according to claim 9 or 10, wherein reinforcing bars are respectively arranged through through holes drilled in each web of the T-shaped steel frame.
C pillar. 12. The main reinforcement is placed inside the corner of the square part surrounded by the first stirrup and the second stirrup in plan view in the central rectangular part of the T-shaped SRC column, and the T-shaped steel frame is Claims 9 to 11, characterized in that reinforcing bars are disposed diagonally between the side surfaces of the web and each of the main bars at the corners.
An SRC column with a T-shaped cross section as described in any one of the following.