TWI780013B - Comb-shaped cutting steel plate - Google Patents

Abstract

A comb-shaped cutting steel plate for a construction is provided. The comb-shaped cutting steel plate is combined with reinforced concrete. The construction includes a beam, a first boundary element, and a second boundary element. The beam is connected between the first column and the second column. The comb-shaped cutting steel plate includes a main plate, a plurality of first fixing plates and a plurality of second fixing plates. The main plate is arranged on the beam and has a first side and a second side. The first fixing plates are connected to the first side of the main plate, and the first fixing plates are arranged at intervals to form a first comb- shaped structure on the first side and partially extend in the first boundary element. The second fixing plates are connected to the second side of the main plate, and the second fixing plates are arranged at intervals to form a second comb-shaped structure on the second side and partially extend inside the second boundary element.

Description

Comb cut steel plate

The invention relates to a comb-shaped cutting steel plate composite reinforced concrete connecting beam of a building.

The connecting beam is an important key member of the ductile reinforced concrete shear wall system. Since the short-span reinforced concrete connecting beam is prone to shear failure and the gripping and slipping damage of the main steel bar, the current Taiwan and American codes are not suitable for short-span connecting beams. It is required to adopt the reinforcement type of diagonal reinforcement, as shown in Figure 1. However, it is very difficult to implement the main reinforcement on site with diagonal reinforcement, which becomes one of the main resistances to promote the shear wall system.

In addition, in reinforced concrete connecting beam members, if the shear force capacity is greater than the shear force requirement, the in-line steel plate is usually placed in the reinforced concrete connecting beam of the traditional beam reinforcement to increase the shear force capacity. However, the result of adding steel plates also increases the moment capacity of the overall connecting beam, resulting in an increase in shear force demand.

In view of this, there is an urgent need for an improved steel plate, which can not only improve the problem of increased bending moment capacity caused by inline steel plates, but also achieve similar seismic behavior to standard diagonal steel bars and have higher constructability.

The object of the present invention is to provide a comb-shaped cutting steel plate for reinforced concrete connecting beams. By cutting both sides of the in-line steel plate, the two sides of the in-line steel plate form a comb-like structure, and then put it into the connecting beam, which can reduce the The bending moment at the end of the beam caused by the insertion of the steel plate increases. Its comb-like structure extends to the anchoring area, which can avoid the reinforcement of the boundary members and improve the construction feasibility. In addition, reducing the cross-sectional area of the steel plate can reduce the bending moment capacity that the steel plate needs to transmit, reduce its shear force demand, and under the condition that the steel plate thickness and yield strength remain unchanged, it can reduce the anchoring demand of the boundary member.

To achieve the above purpose, the present invention discloses a comb-cut steel plate for a reinforced concrete connection structure. The reinforced concrete connection structure includes a beam, a first boundary member and a second boundary member. The beam is connected between the first boundary member and the second boundary member. The comb-shaped cutting steel plate includes a main board, a plurality of first fixing plates and a plurality of second fixing plates. The main board is arranged on the beam and has a first side and a second side opposite to the first side. The first fixing plates are connected to the first side of the main board. Each of the first fixing plates is arranged at intervals to form a first comb-like structure on the first side and partially extend in the first boundary member. The second fixing plates are connected to the second side of the main board. Each of the second fixing plates is arranged at intervals to form a second comb-shaped structure on the second side and partially extend in the second boundary member.

The beam, the first boundary member and the second boundary member are respectively made of a reinforced concrete structure. The reinforced concrete structure includes a plurality of steel bars, and there is a gap between each of the steel bars. Each of the first fixing plates has a first width, the first width is smaller than the gap between the steel bars in the first boundary member, and each of the second fixing plates has a second width, the second width smaller than the gap between the steel bars in the second boundary member.

The main board further has a third side connected between the first side and the second side. The first fixing plate of the first fixing plates near the third side is not aligned with the third side, and the second fixing plate of the second fixing plates near the third side is not aligned with the third side Side aligned.

The main board further has a fourth side opposite to the third side and connected between the first side and the second side. Among the first fixing plates, the first fixing plate near the fourth side is not aligned with the fourth side, and among the second fixing plates, the second fixing plate near the fourth side is not aligned with the fourth side. Side aligned.

The first fixing plates define a first plastic hinge section, adjacent to the first side of the main board, and located between the first column and the main board. The length of the first plastic hinge section is between 1/3 to 1/2 of a depth of the beam.

The second fixing plates define a second plastic hinge segment, adjacent to the second side of the main board, and located between the second column and the main board. The length of the second plastic hinge section is between 1/3 to 1/2 of the depth of the beam.

The first plastic hinge section and the second plastic hinge section respectively have a total width, and the main board has a main board width. The total width is smaller than the width of the main board.

The first plastic hinge section forms a first arc portion near the third side and the fourth side respectively.

The second plastic hinge section forms a second arc portion near the third side and the fourth side respectively.

The main board is compounded with the reinforced concrete structure in the beam by one of a shear connector and a shear nail. The first fixed plates are compounded with the reinforced concrete structure in the first boundary member with the shear connector and one of the shear studs, and the second fixed plates are connected with the shear connector And one of the shear studs is combined with the reinforced concrete structure in the second boundary member.

After referring to the drawings and the implementation methods described later, those with ordinary knowledge in this technical field can understand other objectives of the present invention, as well as the technical means and implementation modes of the present invention.

The content of the present invention will be explained through the following examples. The examples of the present invention are not intended to limit the present invention to be implemented in any specific environment, application or special method as described in the examples. Therefore, the descriptions of the embodiments are only for the purpose of explaining the present invention, rather than limiting the present invention. It should be noted that in the following embodiments and drawings, elements not directly related to the present invention have been omitted and not shown, and the dimensional relationship between the elements in the drawings is only for easy understanding, and is not used to limit the actual ratio.

Please refer to Figure 2 to Figure 4. Fig. 2 is a schematic diagram of the comb-shaped cutting steel plate of the present invention installed on a reinforced concrete connecting beam. The comb-cut steel plate 1 can be used in a reinforced concrete connection structure 2 . The reinforced concrete connection structure 2 includes a beam 21 , a first boundary member 23 and a second boundary member 25 . The beam 21 is connected between the first boundary member 23 and the second boundary member 25 . The beam 21 , the first boundary member 23 and the second boundary member 25 are respectively made of a reinforced concrete structure 27 . The reinforced concrete structure 27 includes a plurality of steel bars 271 , and there is a gap D between each steel bar 271 .

The comb cutting steel plate 1 includes a main board 11 , a plurality of first fixing plates 13 and a plurality of second fixing plates 15 . The main board 11 is disposed on the beam 21 and has a first side 111 and a second side 113 opposite to the first side 111 . The first fixing plates 13 are connected to the first side 111 of the main board 11 . The first fixing plates 13 are arranged at intervals to form a first comb-like structure on the first side 111 and partially extend inside the first boundary member 23 . The second fixing plates 15 are connected to the second side 113 of the main board 11 . The second fixing plates 15 are arranged at intervals to form a second comb structure on the second side 113 and partially extend inside the second boundary member 25 .

Specifically, the first fixing plates 13 and the second fixing plates 15 are obtained by cutting both sides of the straight steel plate. The central part of the cut steel plate is the main plate 11 of the comb-shaped cut steel plate 1, and the two sides of the main plate 11 are comb-shaped structures with symmetrical length and width. The first fixing plate 13 formed on the first side 111 of the main board 11 has a first width D1, and the second fixing plate 15 formed on the second side 113 of the main board 11 has a second width D2.

In order to allow the first fixing plate 13 forming the first comb-like structure to be partially arranged on the first boundary member 23 of the reinforced concrete connection structure 2, and to allow the second fixing plate 15 forming the second comb-like structure to be partially arranged on the steel bar The second boundary member 25 of the concrete connection structure 2, the first width D1 of the first fixing plate 13 is smaller than the gap D between the steel bars 271 in the first boundary member 23, and the second width D2 of the second fixing plate 15 Smaller than the gap D between the steel bars 271 in the second boundary member 25 . In other embodiments, the cut first fixing plate 13 and the second fixing plate 15 can also be non-comb-shaped steel plates slightly narrower than the main plate 11 .

In addition, the main board 11 further has a third side 115 and a fourth side 117 . The third side 115 is connected between the first side 111 and the second side 113 . The fourth side 117 is opposite to the third side 115 and connected between the first side 111 and the second side 113 . To form a cutting state, the parts of the first fixing plates 13 and the second fixing plates 15 close to the third side 115 and the fourth side 117 are not aligned with the third side 115 and the fourth side 117 .

Specifically, among the first fixing plates 13, the first fixing plate 13 close to the third side 115 is not aligned with the third side 115, and is arranged slightly toward the direction of the fourth side 117, and the first fixing plates 13 The first fixing plate 13 close to the fourth side 117 is not aligned with the fourth side 117 , and is arranged slightly toward the third side 115 . Among the second fixing plates 15, the second fixing plate 15 close to the third side 115 is not aligned with the third side 115, and is slightly arranged towards the direction of the fourth side 117, and among the second fixing plates 15, the one close to the fourth side The second fixing plate 15 of the side 117 is not aligned with the fourth side 117 , and is arranged slightly in the direction of the third side 115 . The sum of the first width D1 of each first fixing plate 13 is less than the width of the first side 111 of the main board 11, and the sum of the second width D2 of each second fixing plate 15 is less than the width of the second side 113 of the main board 11 .

Combination between the comb-cut steel plate 1 and the reinforced concrete structure 27 can be done by preparing lateral tie bars, shear connectors or shear nails. Specifically, the main board 11 , the first fixing plates 13 and the second fixing plates 15 have a plurality of openings, so as to combine with the reinforced concrete structure 27 through the openings. The main board 11 is compounded with the reinforced concrete structure 27 in the beam 21 by using one of lateral tie bars, shear connectors and shear nails, and these first fixing plates 13 are made of lateral tie bars, shear connectors and One of the shear nails is compounded with the reinforced concrete structure 27 in the first boundary member 23, and the second fixed plates 15 are connected with the second fixed plate 15 with one of the lateral tie bars, shear connectors and shear nails. The reinforced concrete structure 27 in the boundary member 25 is combined.

For example, please refer to FIG. 7 and FIG. 8 . FIG. 7 is a cross-sectional view of the comb-cut steel plate of the present invention arranged on the reinforced concrete connection structure 2 . Fig. 8 is a section A-A' of the beam 21 shown in Fig. 7 . The comb-shaped cutting steel plate 1 is provided with a plurality of steel bars in the horizontal direction, and the steel bars are fixed vertically with tie bars, and the comb-shaped cutting steel plate 1 and the reinforced concrete structure 27 are combined with shear nails.

The first fixing plate 13 defines a first plastic hinge segment 131 adjacent to the first side 111 of the main board 11 and located between the first boundary member 23 and the main board 11 . The length of the first plastic hinge section 131 is between 1/3 to 1/2 of a depth of the beam 21 . The second fixing plates 15 define a second plastic hinge section 151 adjacent to the second side 113 of the main board 11 and located between the second boundary member 25 and the main board 11 . The length of the second plastic hinge section 151 ranges from 1/3 to 1/2 of the depth of the beam 21 . For example, assuming that the beam 21 has a depth of 50 cm, the lengths of the first plastic hinge section 131 and the second plastic hinge section 151 are respectively between 15 cm and 25 cm.

The first plastic hinge section 131 and the second plastic hinge section 151 respectively have a total width W1, and the main board 11 has a main board width W2. The total width W1 is smaller than the width W2 of the main board. The first plastic hinge section 131 forms a first arc portion 1311 near the third side 115 and the fourth side 117 respectively. The second plastic hinge section 151 forms a second arc portion 1511 near the third side 115 and the fourth side 117 respectively. The first arc portion 1311 and the second arc portion 1511 are a pair. In other embodiments, the first plastic hinge section 131 near the third side 115 and the fourth side 117 can also form a right angle or a slope, etc., and the second plastic hinge section 151 near the third side 115 and The fourth side 117 can also be formed into shapes such as right angles or slopes.

To sum up, the comb-shaped cutting steel plate of the present invention cuts both sides of the in-line steel plate to form a comb-shaped cutting steel plate with comb-shaped structure on both sides, so as to reduce the problem of the increase of the beam end bending moment caused by the insertion of the steel plate , and set multiple openings on the comb-cut steel plate to combine with the reinforced concrete connecting beam in the building. In addition, the comb-cut steel plate of the present invention can further increase the shear strength to avoid shear damage, and can reduce the need for anchoring, and the configuration of lateral tie bars will not cause binding conflicts.

The above-mentioned embodiments are only used to illustrate the implementation of the present invention and explain the technical features of the present invention, and are not used to limit the scope of protection of the present invention. Any changes or equivalence arrangements that can be easily accomplished by those familiar with the technology fall within the scope of the present invention, and the protection scope of the present invention should be based on the scope of the patent application.

1: Comb cutting steel plate 11: Motherboard 111: first side 113: second side 115: third side 117: Fourth side 13: The first fixed plate 131: The first plastic hinge section 15: The second fixed plate 151: The second plastic hinge section 2: Reinforced concrete connection structure 21: Beam 23: First boundary member 25: Second boundary member 27: Reinforced concrete structure 271: Rebar D: Gap D1: first width D2: second width W1: total width W2: Motherboard width

Fig. 1 is prior art diagonal reinforcement Schematic diagram of the board; Fig. 2 is the schematic diagram that the comb cutting steel plate of the present invention is arranged on the reinforced concrete connection structure; Fig. 3 is the schematic diagram of comb cutting steel plate of the present invention; Fig. 4 is the cross-sectional view of the comb-shaped cutting steel plate of the present invention arranged on the reinforced concrete connection structure; Fig. 5 is the local schematic diagram of comb cutting steel plate of the present invention; Fig. 6 is a partial schematic view of the comb-shaped cutting steel plate of the present invention arranged on a reinforced concrete connection structure; Fig. 7 is a cross-sectional view of a comb-shaped cutting steel plate of the present invention arranged on a reinforced concrete connection structure; and Fig. 8 is a cross-sectional view of the beam shown in Fig. 7 .

1: Comb cutting steel plate

2: Reinforced concrete connection structure

21: Beam

23: First boundary member

25: Second boundary member

27: Reinforced concrete structure

Claims (10)

A comb-shaped cutting steel plate used in a reinforced concrete connection structure, the reinforced concrete connection structure includes a beam, a first boundary member and a second boundary member, the beam is connected to the first boundary member and the second boundary member Between the two boundary members, the comb-cut steel plate contains: a main plate disposed on the beam and having a first side and a second side opposite to the first side; A plurality of first fixing plates connected to the first side of the main board, each of the first fixing plates is arranged at intervals to form a first comb-like structure on the first side and partially extend in the first boundary member ;as well as A plurality of second fixing plates connected to the second side of the main board, each of the second fixing plates is arranged at intervals to form a second comb-like structure on the second side and partially extend in the second boundary member . The comb-cut steel plate as described in Claim 1, wherein the beam, the first boundary member and the second boundary member are respectively made of a reinforced concrete structure, and the reinforced concrete structure includes a plurality of steel bars, each of the steel bars There is a gap between them, each of the first fixing plates has a first width, the first width is smaller than the gap between each of the steel bars in the first boundary member, and each of the second fixing plates has a second width , the second width is smaller than the gap between the steel bars in the second boundary member. The comb-cut steel plate as described in claim 2, wherein the main plate further has a third side connected between the first side and the second side, and the one of the first fixing plates close to the third side The first fixing plate is not aligned with the third side, and the second fixing plate close to the third side among the second fixing plates is not aligned with the third side. The comb-cut steel plate as described in claim 3, wherein the main plate further has a fourth side opposite to the third side and connected between the first side and the second side, among the first fixed plates The first fixing plate close to the fourth side is not aligned with the fourth side, and the second fixing plate of the second fixing plates close to the fourth side is not aligned with the fourth side. The comb-cut steel plate as claimed in claim 4, wherein the first fixed plates define a first plastic hinge section, adjacent to the first side of the main plate, and located between the first boundary member and the main plate , the length of the first plastic hinge section is between 1/3 and 1/2 of a depth of the beam. The comb-cut steel plate as claimed in claim 5, wherein the second fixed plates define a second plastic hinge section adjacent to the second side of the main plate and located between the second boundary member and the main plate , the length of the second plastic hinge section is between 1/3 and 1/2 of the depth of the beam. The comb-cut steel plate according to claim 6, wherein the first plastic hinge section and the second plastic hinge section respectively have a total width, the main board has a main board width, and the total width is smaller than the main board width. The comb-cut steel plate as described in Claim 7, wherein the first plastic hinge section forms a first arc portion near the third side and the fourth side respectively. The comb-cut steel plate according to claim 8, wherein the second plastic hinge section forms a second arc-shaped portion near the third side and the fourth side respectively. The comb-cut steel plate as described in claim 9, wherein the main plate is combined with the reinforced concrete structure in the beam by one of a shear connector and a shear nail, and the first fixed plates are connected by the shear force One of the connector and the shear stud is compounded with the reinforced concrete structure in the first boundary member, and the second fixed plates are connected with the second fixed plate by one of the shear connector and the shear stud. 2. Composite reinforced concrete structure in boundary members.

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