KR20080020915A - Bolted moment resist connection of steel column and steel beams for easy site job - Google Patents

Abstract

A rigid joint bolted method of a steel column and a steel beam for easy installation is provided to increase inner resistant moment of bolt holes by placing the bolt combining holes on the steel plate and increasing the inner resistant moment of the combined parts. Upper and lower parts of steel plates(20) are shaped like a hook. Ý‹ shaped steel plates(8) are formed by welding the hook shaped steel plates. The hook shaped steel plates are bolted by placing steel plates(16) and bolt holes(9,10,15,18) at higher or lower positions than the upper and lower flanges of the steel beams. The upper parts of the steel plates are curved with a predetermined angle to insert the hook shaped steel plates easily. A plurality of steel beam columns(7') are vertically installed. Multiple deck plates are installed on the steel beam columns and steel beams(1').

Description

Bolted Moment Resist Connection of Steel Column and Steel Beams for Easy Site Job}

1 is an elevation view showing a pin joint structure of a conventional steel column and cheolgolbo,

Figure 2 is an elevation view showing a moment bolt joint structure of the steel column and cheolgolbo of the present invention,

3 is a plan view showing the moment bonding structure of the steel column and steel cheolgolbo of the present invention,

4 is a perspective view, elevation view of a steel plate protruding from a conventional steel column;

5 is a perspective view, elevation view of the steel plate protruding from the steel frame pillar of the present invention,

Figure 6 is a perspective view of the separated steel plate protruding from the steel beam of the present invention,

7 is a perspective view of a steel plate protruding from the steel beam of the present invention,

8 is a comparative detail of the hook-shaped iron plate of the iron plate protruding from the steel beam of the present invention and the existing method,

9 is a detailed view of the hook-shaped iron plate of the steel plate protruding from the steel beam of the present invention,

10 is an elevation view showing a moment welded structure of the steel column and cheolgolbo of the present invention,

11 is a schematic view showing the construction of the steel column and cheolgolbo of the present invention,

<Explanation of symbols for main parts of drawing>

1,1 ': Steel frame 2: Steel plate protruding from the beam

3: lowest bolt hole of the steel plate protruding from the beam 4: upper junction of the iron plate protruding from the pillar

5: Iron plate protruding from the pillar 6: Iron plate bonded to the pillar

7,7 ': Steel column 8: Steel plate joined to beam

9: Top bolt hole of steel plate protruding from beam

10: top bolt hole of steel plate protruding from pillar

11: Upper bolt to be bonded to beam 12: Lower bolt to be bonded to beam

13: Upper bolt to be joined to the pillar 14: Lower bolt to be joined to the pillar

15: lowest bolt hole of steel plate protruding from pillar

16: iron plate protruding from the column

17: Iron plate joined to pillar 18: Lowermost bolt hole of steel plate protruding from beam

19: fan-shaped iron plate protruding from the pillar

20: hook-shaped iron plate protruding from the beam 21: deck plate

22: topping concrete

The purpose of the present invention is to improve the problems occurring in the existing pin joint, by positioning the bolt hole position of the beam-column connection greater than the upper and lower length of the cheolgolbo flange is possible to move closer to the moment joint than the existing pin joint By dispersing the moment generated at the joints to adjacent members, it is possible to resist the lateral force with only the beam-column frame without additional shear wall construction, and to propose the connection that can improve the workability and increase the effect of air shortening. The purpose is.

As a conventional method for forming the connection portion of the steel column and cheolgolbo, the pin bonding method shown in Figure 1 is generally used. In this pin joining method, as shown in FIG. 1, a separate steel plate 6 is welded or bolted to a steel column, and bolt holes are placed on two steel plates 4 protruding from the steel plate, and the steel plates protruding from the beams. The construction can be completed by arranging the bolt holes at the two ends and fastening the two bolt holes with the bolts. Compared to conventional steel cheolgolbo by welding, the field work is easier and has the advantage of accelerating the construction speed.

In the conventional method of Figure 1 the bolted joint is fastened in two ways. An opening such as (4) was placed in the upper part of the plate protruding from the column to facilitate insertion of the iron plate from the beam, while a hook-shaped insert (3) was placed under the iron plate protruding from the column, so that the lowest bolt When fastened, the upper bolt is a joining method considered to facilitate construction at high floors by considering that all bolts are filled even if the beam is moved a little. This joining method has the merit of excellent joining method except that it is a pin joint that cannot receive moments.

4 is a hardware protruding from the pillar in the existing method. In order to insert the iron plate coming from the beam between the two protruding iron plate to this iron, as shown in Figure 4 (4) the iron of the upper part of the iron plate is bent. In this case, a work that requires cutting or welding the iron is required and it is not very efficient to insert the iron plate. In the present invention, by bending the entire upper portion of the iron plate as shown in (19) of Figure 5, it was considered to be easy to iron processing operations and iron plate insertion process.

In the conventional method, the simple joint portion of the steel plate coming from the beam as shown in Figure 8 is to insert one bolt at the bottom and place the iron plate on it, and to complete the connection work by additional bolting work. In this case, the iron plate is considered to be inserted into the bolt's diameter by 2/3 after bending, but it is structurally stable because the iron plate may pop out of the bolt when subjected to dynamic load such as excessive lateral force or earthquake load. not. In the present invention, by considering that the iron plate is bent 1.5 times or more of the bolt diameter as shown in (18) of Figure 9, it is possible to stably exhibit sufficient strength even under excessive lateral force or dynamic load.

The technical problem to be achieved in the present invention is to increase the weak moment resistance ability in the iron plate bolting method with excellent workability. To this end, various methods can be conceived, but by increasing the length of the iron plate to be inserted and placing a bolted joint therein, the internal resistance moment of the joint is increased by increasing the moment arm length. The additional bolt holes 9, 10, 15, 18 result in an increase in the internal resistance moment, and the joint internal resistance moment increases with the bolt size and the thickness of the insert plate.

The configuration of the present invention is a rectangular shape attached to the two long iron plate 16 of Fig. 4, the upper portion protruding from the steel column (7 ') fan-shaped to facilitate the insertion of the hook-shaped iron plate 20 protruding from the beam. Iron plate 17; The upper and lower portions protruding from the cheolgolbo (1 ') is composed of a c-shaped iron plate 8 welded to the iron plate 20 of the hook shape. The bolt is fastened to the lowermost bolt hole 15 of the long iron plate 16 extending in a fan shape on the upper part of the two iron plates protruding from the pillar, and the bent bolt protruding from the beam above the iron plate 20. The insertion hole 18 is inserted between two long iron plates 16 extending in a fan shape to be placed on the lowermost bolt hole 15 to fix the beams, and then tighten the remaining bolts to join the steel column and the cheolgolbo. do.

The joining of the steel column and the cheolgolbo is made through the steel plate attached to each member, and the bolted holes (9, 10, 15, 18) machined on the steel plate attached to the member is positioned higher than the steel golbo, so It is characterized by enabling the behavior.

The iron plate (4) is spread in a fan shape on the top to facilitate the insertion of the iron plate 20 to the hook shape attached to the cheolgolbo, triangular shape and bolts from the bottom bolt hole to the bottom of the iron plate of the hook-shaped iron plate 20 It is machined to be inserted to the depth of the hole (18) and is formed to receive additional parent.

Column and beam joints are often divided into theoretical pure pin joints or complete steel joints. Most joints exhibit performance between pure pin joints and full hard joints. A complete steel joint refers to a connecting part capable of dispersing moment generated in one member through the connecting part as it is to the adjacent connecting member. On the other hand, the pinned portion refers to a connecting portion that absorbs through deformation in the connecting portion itself without dispersing the moment generated in one member to the connecting member.

The closer it is to the complete steel connection, the less the parent moment occurs at the beam end and the positive moment in the center of the beam decreases. Therefore, in the beam of the same load and the same span, the closer the connecting portion is to the steel connection, the smaller the cross section of the beam is required.

In addition, as the building becomes more arduous, it needs the ability to withstand a certain amount of lateral force. If the building frame is purely formed with pin joints, shear walls that can resist lateral forces should be constructed inside the building. The only way to resist the lateral force by the pure frame is to use the moment resistance frame using the connection close to the complete steel connection. Therefore, the closer the connection is to the steel connection, the smaller the shear wall size required, the smaller the beam and column size, and the more efficient the structure can be formed.

In the present invention, the moment resistance frame connection by the bolt joint was proposed. This connection part is a construction method that can bring convenience of construction and shortening of air, and it can be several floors per day, and it is possible to carry out several layers of slab construction at the same time, so that high-speed construction is possible, and the field work and manpower are innovative. Decrease.

Claims (4)

The upper and lower parts of the iron plate 20, characterized by the shape of the iron plate (8) and the U-shaped iron plate (8) attached by welding the hook-shaped iron plate; In addition, the hook-type iron plate is the steel plate (20, 16) and bolt holes (9, 10, 15, 18) in the upper and lower positions of the upper and lower flanges of the steel plate, so that the steel joint is simple by simple bolting Structures characterized in that to enable the behavior of. By bending the entire upper part of the iron plate as shown in (19) of FIG. 5 to facilitate the insertion of the hook-shaped iron plate 20 protruding from the beam, the form of the iron to be considered to facilitate the iron processing operation and the iron plate insertion process . Since the hook shape protruding from the cheolgolbo is considered to be inserted at the bottom of the iron plate 20 in a triangular form as shown in FIG. 9 (18) to be inserted more than 1.5 times the bolt diameter, even under excessive lateral force or dynamic load The shape is considered to be able to exhibit sufficient strength. By utilizing the junctions of claims 1, 2 and 3, Installing a plurality of steel pillars 7 'vertically; Fastening bolts to the lowermost bolt hole 15 between two steel plates 16 extending in a fan shape on top of two steel plates protruding from the pillars at right angles to the steel pillars 7 '. Then, the shape of the hook projecting from the beam is inserted between the two long iron plates 16 extending in a fan shape by inserting the bolt insertion holes 18 bent from the lower end of the iron plate 20 and placing them on the lowermost bolt hole 15. Binding the beam and the pillar by fastening the remaining bolts after fixing the beam; Installing several deck plates 20 on the steel pillars 7 'and the cheolgolbo 1'; And Placing a topping concrete 21 on top of the plurality of steel pillars 10, cheolgolbo 1 and deck plate 20; Method for building a structure, characterized in that consisting of.

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