JP2007100383A - Divided structure of large steel h beam, and method of assembling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a large steel H beam which is divided into upper and lower sections or into upper and lower end sections, and facilitates assembly of the divided sections in the construction field. <P>SOLUTION: The steel H beam is formed of: a steel H beam upper block 1 consisting of an upper flange 1a, upper vertical stiffener plates 2 for preventing buckling, and upper connection plates 4 to be mounted on columns 9, respectively; and a steel H beam lower block 6 consisting of a lower flange 6a, lower vertical stiffener plates 7 for preventing buckling, and lower connection plates 8 to be mounted on the column 9, respectively. The steel H beam lower block 6 has a vertical partition plate 3 which doubles as a horizontal stiffener plate for preventing buckling and as a connection plate between the upper block 1 and the lower block 6. Thus the steel H beam is set up by connecting the vertical partition plate 3, the upper vertical stiffener plates 2, and the upper connection plates 4 together. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steel structure, and more particularly to a split structure of a large steel H-shaped beam such as a boiler suspension beam of a power generation boiler support frame and an assembling method thereof.

  FIG. 6 shows a structure of a conventional large steel H-beam and a cross-sectional view thereof. Conventionally, the large steel H-shaped beam 30 is composed of an H-shaped main body, a vertical stiffener plate 31 for preventing buckling of the plate, a horizontal stiffener plate 32, and the like, and is integrally welded and assembled at a factory. . After being brought into the field, the connection plate 33 is used to join the pillars 9 on both sides with the joining bolts 5 and is installed as one member of the steel frame.

  In large structures, especially boiler suspension beams for power generation boiler frames, the size of the members has increased to a size that exceeds 7m in height and 30m in length. It becomes impossible to transport by trailer.

  As described above, when transporting large boiler suspension beams, transportation using large rivers or large barges on the sea is necessary. In addition to the large cost of maintenance, there is a problem that the manufacturing plant requires a large place and manufacturing equipment because of its large size, and the options for the manufacturing place are limited.

  In addition, the conventional method of dividing a beam and carrying it to the site and assembling it with bolts requires an enormous number of bolts and bolt holes when the size of the member increases. There was a problem that the bolt could not be tightened due to a drop in strength due to a cross-sectional defect or a bolt hole shift on site.

  An object of the present invention is to provide an optimal large-sized steel H-beam divided structure that can solve the above-described problems, and an integrated assembly method at or near the site.

In order to solve the above problems, the present invention adopts the following configuration.
A steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for mounting on a column;
A steel H-shaped beam comprising a lower flange, a lower vertical stiffener plate for preventing buckling, and a lower connection plate for attaching to a column, a steel H-shaped beam lower block,
The steel H-beam lower block is a horizontal stiffener plate that prevents buckling and has an upper and lower partition plate that is a coupling plate of the upper block and the lower block,
The upper and lower partition plates are combined with the upper vertical stiffener plate and the upper connection plate.

In addition, a steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for mounting on a column,
Upper and lower partitions which are a lower flange, a lower vertical stiffener plate for preventing buckling, a lower connection plate for mounting on a column, a horizontal stiffener plate for preventing buckling, and a coupling plate for the upper block and the lower block A steel H-shaped beam lower block comprising a plate, and a steel H-shaped beam assembly method comprising:
Installing the lower flange on a cradle;
Providing a guide plate for determining the attachment position of the upper connection plate on the upper and lower partition plates;
Hanging the steel H-beam upper block along the guide plate and temporarily attaching it to a predetermined position;
A method of assembling a steel H-shaped beam, comprising: welding the upper and lower partition plates, the upper vertical stiffener plate and the upper connection plate after the temporary attachment to form a steel H-shaped beam.

A steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for attachment to one pillar;
A steel H-shaped beam comprising a lower flange, a lower vertical stiffener plate for preventing buckling, and a lower connection plate for attaching to the one pillar, a steel H-shaped beam lower block,
In addition to the steel H-beam upper block and the steel H-beam lower block, the steel H-beam has an integrated connection plate for attachment to the other column, and forms an end in the length direction of the steel H-beam. Further having an end block;
The steel H-beam lower block is a horizontal stiffener plate that prevents buckling and has an upper and lower partition plate that is a coupling plate of the upper block and the lower block,
The upper and lower partition plates, the upper vertical stiffener plate and the upper connection plate are combined to form an integrated structure, and the integrated structure and the end block are combined.

  According to the present invention, there is an advantage that a large member can be divided and manufactured, and the location of the manufacturing factory is not limited. In addition, manufacturing costs and transportation costs can be greatly reduced. Furthermore, it is possible to shorten the assembly period at the site or in the vicinity and reduce the cost.

  A large steel H-shaped beam according to an embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a view showing a configuration after assembling of divided blocks of a large steel frame H-beam according to an embodiment of the present invention. FIG. 2 is a diagram showing a divided block of a large steel H-beam according to the present embodiment. FIG. 3 is a view showing a method and a procedure for assembling a divided block of a large steel frame H-beam according to this embodiment.

  1-3, 1 is a steel H-shaped beam upper block, 1a is an upper flange, 2 is an upper stiffener plate, 3 is an upper and lower partition plate, 4 is an upper connection plate, 5 is a joint bolt, and 6 is a steel H-shaped beam. Lower block, 6a is a lower flange, 7 is a lower stiffener plate, 8 is a lower connection plate, 9 is a column, 20 is a fall prevention stay, 21 is a guide plate, 22 is a hydraulic jack, 23 is a cradle, 24 Represents a scaffold, and 25 represents a jack rest.

  1 and 2, the large steel H-beam according to the embodiment of the present invention is manufactured by being divided into a steel H-beam upper block 1 and a steel H-beam lower block 6. The steel H-beam upper block 1 includes an upper flange 1a, an upper stiffener plate 2, and an upper connection plate 4. The steel H-beam lower block 6 includes an upper and lower partition plate 3, a lower flange 6a, and a lower side. It consists of a stiffener plate 7 and a lower connection plate 8, each manufactured at a factory.

  These components are welded to the upper connection plate 4 and the upper stiffener plate 2 of the steel H-beam upper block 1 on the upper and lower partition plates 3 of the steel H-beam lower block 6 at or near the installation site. By doing so, it is completed as a large steel frame H-shaped beam. The upper and lower partition plates 3 have the same function as the horizontal stiffener plate 32 provided on the large steel H-shaped beam having the conventional structure shown in FIG.

  Next, FIG. 3 shows an assembling method of the steel H-beam upper block 1 and the steel H-beam lower block 6 which are separately manufactured. First, the steel H-shaped beam lower block 6 is installed on the cradle 23 so that the lower flange 6a faces downward, and if necessary, a fall prevention stay 20 for preventing the fall, a scaffold 24 for work, etc. are installed. To do. Subsequently, guide plates 21 for determining the mounting position of the upper connection plate 4 of the steel H-beam upper block 1 are mounted on the upper and lower partition plates 3 at appropriate intervals. Thereafter, the steel H-beam upper block 1 is suspended along the guide plate 21, temporarily set at a predetermined position, and tack welded.

  At this time, if the upper connection plate 4 cannot be temporarily attached to the center of the upper and lower partition plates 3 due to deformation, the jack receiver 25 is attached by welding as shown in the figure, and correction is performed using the hydraulic jack 17 or the like. After completing the tacking as described above, the upper connection plate 4, the upper stiffener plate 2, and the upper and lower partition plates 3 are welded to complete a large steel H-shaped beam. Of course, care should be taken not to cause deformation in connection with welding.

  A feature of the embodiment of the present invention is that a horizontal stiffener plate 32 (see FIG. 6) having a conventional structure is provided to the upper and lower partition plates 3, and the upper and lower partition plates 3 and the steel H-beam upper block 1 are welded. It is that. When splitting a large steel H-beam with a conventional structure and integrating it at the installation site, the upper and lower connection plates will be welded together. At this time, the connection plates are distorted by welding, and the accuracy of the bolt holes It is difficult to secure. On the other hand, in the embodiment of the present invention, the upper and lower partition plates 3 serve as flanges, and deformation of the connection plates 4 and 8 can be minimized (the upper and lower partition plates in this embodiment are horizontal stiffeners). It can be said that this function is combined with the function of combining the upper and lower blocks).

  FIG. 2 shows a block diagram of a large steel H-beam according to the present embodiment, and FIG. 1 shows a completed diagram after the divided blocks are assembled together. According to the present embodiment, as shown in FIG. 2, the steel H-type upper block 1 to which the upper stiffener plate 2 is attached, and the steel H-type lower block 6 composed of the lower stiffener plate 7 and the upper and lower partition plates 3. Produce separately. Thereafter, the steel H-type upper block 1 is attached to the steel H-type lower block 6 by welding as shown in FIG. The horizontal stiffener plate 32 shown in FIG. 6 which is necessary in the conventional structure is not necessary because the upper and lower partition plates 3 shown in FIG.

  The upper and lower blocks 1 and 6 are assembled by the procedure and method shown in FIG. First, in addition to the fall prevention stay 20, the guide plate 21 is installed on the lower block 6. Thereafter, the upper block 1 is inserted from above along the gap of the guide plate 21 to perform temporary setting. Next, the jack holder 25 is used to make final adjustments with the jack 22, a vise, and the like, and the upper block 1 is attached to the upper and lower partition plates 3 by welding to complete an integral H-shaped beam. According to the assembly method shown in FIG. 3, the upper block 1 can be smoothly inserted and temporarily fixed during welding by the guide blade 21, and the jack holder 20 can be used for fine adjustment with a jack or the like, thereby suppressing welding distortion. However, it can be integrated and assembled quickly.

  Next, a large steel H-shaped beam according to another embodiment of the present invention will be described below with reference to FIGS. FIG. 4 shows a large steel H-beam according to another embodiment of the present invention, which is divided into an upper block and a lower block, and further divided into end blocks in the length direction of the H-beam. It is a figure which shows the structure which assembled the block. FIG. 5 is a view showing a divided block obtained by dividing a large steel H-shaped beam according to another embodiment of the present invention into an upper block, a lower block, and an end block.

  4 and 5, reference numeral 12 denotes an end block (a block obtained by dividing an end portion in the longitudinal direction of the H-shaped beam), 13 denotes a web splice plate, 14 denotes a flange splice plate, 15 denotes an integral connection plate, 16 Is an end block joint bolt, 30 is a steel H-shaped beam, 31 is a vertical stiffener plate, 32 is a horizontal stiffener plate, and 33 is a connection plate. 4 and 5 denote the same components as those in FIGS. 1 to 3 in common.

  A large steel H-shaped beam according to another embodiment of the present invention is a configuration example in which the length direction of the beam is further divided by an end block 12 in addition to the upper block 1 and the lower block 6. This is an effective configuration example when the length of a block is limited due to a place restriction at the time of manufacturing each block in a factory.

  In another embodiment of the present invention, the upper block 1 and the lower block 6 are integrally assembled by the assembling method shown in FIG. 3 (after assembling as an integral assembly), then the web splice plate 13, the flange splice plate. The end assembly 12 is joined to the end block 12 using the end block joining bolts 16.

  Here, the flange splice plate 14 connects the upper flange 1a (see FIG. 1) in the upper block 1 and the lower block 6 assembled together and the upper flange 1a of the end block 12 with a splice plate. It is. In that case, a hole is provided in each of the flange splice plate 14, the upper flange 1 a of the upper block 1, and the upper flange 1 a of the end block 12, and a bolt and a splice plate are connected to the holes through bolts. Similarly, the lower flanges are connected by the flange splice plate 14 and bolts). Similarly, a hole is formed in the connecting member that connects the upper flange 1a and the lower flange 6a in the H-shaped beam (a hole is formed in each connecting member of the integrated assembly block and the end block), and the integrated assembly block The end block is connected to the perforated web splice price 13 with a bolt.

  This connection may be joined by welding in addition to the bolt connection by the end block joining bolt 16. In addition, after the end block 12 alone is previously installed in the normal position of the column 9 with the joint bolt 5 using the integrated connection plate 15 in advance, the upper and lower blocks of the remaining integrated assembly are similarly installed in the normal position. Also good.

  As explained above, with the increase in the size of steel structures, especially structures that support heavy objects such as a power generation boiler support frame, the size of steel members such as H-beams has increased. Increasing cases are difficult to transport. When assembling locally, it is difficult to ensure the required product tolerances or quality due to the lack of equipment and lack of welding engineers. In other words, it is a factor of cost increase. Therefore, in the present invention, a large H-shaped beam is divided into several blocks, and a structure that can be easily assembled integrally by welding and an assembling method thereof are employed. Larger parts will require a large scaffold during welding assembly, or equipment to correct distortion due to welding heat input. By adopting the structure and assembly method according to the present invention, these incidental equipment will be greatly improved. It is possible to reduce the manufacturing period and the manufacturing cost.

It is a figure which shows the structure after the assembly of the division | segmentation block of the large sized steel frame H type beam which concerns on embodiment of this invention. It is a figure which shows the division | segmentation block of the large sized steel frame H type beam which concerns on this embodiment. It is a figure which shows the method and procedure which assemble the division | segmentation block of the large sized steel frame H type beam which concerns on this embodiment. In addition to dividing the large steel H-beam according to another embodiment of the present invention into an upper block and a lower block, the large steel H-beam is divided into end blocks in the longitudinal direction of the H-beam, It is a figure which shows the assembled structure. It is a figure which shows the division | segmentation block by which the large sized steel frame H type beam which concerns on other embodiment of this invention was divided | segmented into the upper block, the lower block, and the edge part block. It is a figure which shows the structure of the conventional large steel frame H type beam, and its cross section.

Explanation of symbols

1 Steel H-shaped beam upper block 1a Upper flange 2 Upper stiffener plate 3 Upper / lower partition plate 4 Upper connection plate 5 Joint bolt 6 Steel H-shaped beam lower block 6a Lower flange 7 Lower stiffener plate 8 Lower connection plate 9 Column 12 End block 13 Web splice plate 14 Flange splice plate 15 Integrated connection plate 16 End block joint bolt 20 Fall prevention stay 21 Guide plate 22 Hydraulic jack 23 Receiving base 24 Scaffold 25 Jack receiver 30 Steel H-shaped beam 31 Vertical stiffener plate 32 Horizontal stiffener plate 33 Connection plate

Claims (3)

A steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for mounting on a column;
A steel H-shaped beam comprising a lower flange, a lower vertical stiffener plate for preventing buckling, and a lower connection plate for attaching to a column, a steel H-shaped beam lower block,
The steel H-beam lower block is a horizontal stiffener plate that prevents buckling and has an upper and lower partition plate that is a coupling plate of the upper block and the lower block,
A steel H-shaped beam comprising the upper and lower partition plates, the upper vertical stiffener plate, and the upper connection plate. A steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for mounting on a column;
Upper and lower partitions which are a lower flange, a lower vertical stiffener plate for preventing buckling, a lower connection plate for mounting on a column, a horizontal stiffener plate for preventing buckling, and a coupling plate for the upper block and the lower block A steel H-shaped beam lower block comprising a plate, and a steel H-shaped beam assembly method comprising:
Installing the lower flange on a cradle;
Providing a guide plate for determining the attachment position of the upper connection plate on the upper and lower partition plates;
Hanging the steel H-beam upper block along the guide plate and temporarily attaching it to a predetermined position;
A method of assembling a steel H-shaped beam comprising the steps of welding the upper and lower partition plates, the upper vertical stiffener plate and the upper connection plate after the temporary attachment to form a steel H-shaped beam. . A steel H-beam upper block comprising an upper flange, an upper vertical stiffener plate for preventing buckling, and an upper connection plate for attachment to one of the columns;
A steel H-shaped beam comprising a lower flange, a lower vertical stiffener plate for preventing buckling, and a lower connection plate for attaching to the one pillar, a steel H-shaped beam lower block,
In addition to the steel H-beam upper block and the steel H-beam lower block, the steel H-beam has an integrated connection plate for attachment to the other column, and forms an end in the length direction of the steel H-beam. Further having an end block;
The steel H-beam lower block is a horizontal stiffener plate that prevents buckling and has an upper and lower partition plate that is a coupling plate of the upper block and the lower block,
The upper and lower partition plates, the upper vertical stiffener plate and the upper connection plate are combined to form an integrated structure, and the integrated structure and the end block are combined. Steel frame H beam.

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