JPH03235840A - Supporting device for structure supporting part - Google Patents

Abstract

PURPOSE:To decrease stress generated in an anchor bolt, by transmitting horizontal force, which acts on an upper part structure, to a lower part structure through a sheet plate, arranged in the lower surface of a base plate, and stoppers provided in both sides. CONSTITUTION:A sheet plate 2, having a plane area larger than a base plate 1, is arranged over a total surface between its lower surface and the upper surface of a lower part structure S2. Next, stoppers 3... are positioned in both sides in at least one direction of the base plate 1 and fixed to an upper surface of the sheet plate 2 to restrict a horizontal movement of the base plate 1. Horizontal force, which acts on an upper part structure S1, is transmitted through the stoppers 3, 3 and the sheet plate 2 to anchor bolts 4, 4 or directly to the lower part structure S2. In this way, the anchor bolts 4, 4 of small diameter can be used with no bending moment acting on the anchor bolts 4, 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a roof of a steel frame structure, or a supporting part of a superstructure including columns, which is attached to a substructure after its horizontal expansion after construction is completed. The present invention relates to a support device for a structure support part, which is fixed to a structure support part.

[Problem to be solved by the invention]

Conventionally, the support part of the roof structure consisting of beams and girders, etc., and the steel frame superstructure, including the columns connected thereto, to the concrete or steel frame substructure is as shown in Figure 7-■. For example, the structure is such that a base plate, which is connected to the lower end of a column leg made of a rib plate, etc., is connected by anchor bolts embedded in the lower structure.

The superstructure is assembled while the vertical load is supported by the supports, but if the superstructure has a sloped roof, such as a mountain-shaped rigid frame structure, when the supports are removed after the superstructure has been constructed, the supporting parts tend to expand due to their own weight. , because it moves horizontally, in order to avoid applying excessive force to the anchor bolt at this time, a hole larger than the diameter of the anchor bolt and allowing for the amount of movement is provided in the base plate, as shown in Figure 7-■ and Figure 8. is dawned.

Due to the presence of these holes, the upper structure is in a movable state relative to the lower structure when the base plates are joined, so in order to transmit horizontal force between the upper and lower structures, for example, as shown in Figures 7 and 8, It is necessary to weld a holding plate with a hole about the same diameter as the anchor bolt after the upper structure has been moved, and to integrate the base plate with the anchor bolt to restrain the upper structure against horizontal forces.

However, in this structure, the anchor bolt is loaded at the holding plate position, and as a result of receiving horizontal force on the cantilever beam 2 above the top of the concrete or base mortar, it bears a bending moment in addition to pullout force and shear force. I will do it.

It is possible to cope with the stress caused by this bending moment by increasing the diameter of the anchor bolt, but since the anchor bolt becomes extremely thick, the supporting device becomes large and may become impractical.

This invention was made based on this background, and aims to propose a new support device that reduces the influence of horizontal force on anchor bolts.

[Means to solve the problem]

In the present invention, a seat plate with a larger planar area is placed below the base plate, and stoppers are connected to both sides of the base plate in at least one direction on the upper surface of the seat plate, so that the horizontal force of the upper structure is absorbed by the protruding ends of the anchor bolts. It is transmitted from the seat plate position to the lower structure, preventing bending moments from acting on the anchor bolts and reducing the stress they bear.

The seat plate is disposed over the entire surface between the lower surface of the base plate and the upper surface of the lower structure, and a stopper is joined to the upper surface of the seat plate in a direction opposite to the base plate so as to be engaged therewith.

The horizontal force applied to the upper structure is transmitted from the base plate to the protruding end of the anchor bolt via the stopper and the seat plate, and only the pull-out force and shearing force act on the anchor bolt.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The support device A of the present invention includes a seat plate 2 disposed between a base plate 1 joined to the lower end of the upper structure S and the upper surface of the lower structure S2, and a seat plate 2 joined to both sides of the base plate 1 on the upper surface in the horizontal direction. The horizontal force of the upper structure S1 is transmitted to the lower structure S2 via the seat plate 2 and the stopper 3.

The base plate 1 and the seat plate 2 have insertion holes 1a and 2a, respectively, through which the anchor bolts 4 are inserted, as shown in FIG.
is made larger than the diameter of the anchor bolt 4 in order to allow horizontal movement of the upper structure S1 when loaded, and the insertion hole 2a of one sheet plate 2 is made to have the same size as necessary to transmit force to the anchor bolt 4. It's dawning.

If the lower structure S2 is made of concrete, the sheet plate 2 is installed on the base mortar 5 laid on the top.

Further, a sliding pad 6 is interposed between the seat plate 2 and the base plate 1, if necessary, for smoothing the relative movement of the base plate 1 with respect to the seat plate 2 when the upper structure S1 moves horizontally.

The sliding pad 6 is formed, for example, by applying grease or the like to one side of a thin plate, or by placing a polytetrafluoroethylene film on the plate to reduce the coefficient of friction between the base plate 1 and the seat plate 2. This is what I did.

This sliding pad 6 also reduces frictional force,
It serves to prevent the base plate 1 from sliding unevenly and to equalize the force applied to the stopper 3.

The stops 3.3 are arranged oppositely on both sides of the base plate 1 in at least one direction.

Figure 1 shows a case in which the insertion hole 1a of the base plate 1 is opened in a circular shape larger than the diameter of the anchor bolt 4, and is arranged facing each other in two directions. This is a case where they are made to face each other in one direction.

In the former case, in the embodiment shown in FIG. 1, the planar shape of the stopper 3 is made into a piece-like shape, so that the stopper 3 is arranged at four locations and is opposed in two directions.

In the case of the latter embodiment, the stopper 3.3 is disposed in a direction perpendicular to the length direction of the insertion hole 1a, and transmits external force by restricting movement in that direction, while preventing movement in the long hole direction of the insertion hole 1a. The structure allows this, and the support part becomes a roller support in that direction.

Further, in this case, the insertion hole 1a is given a play in the direction opposite to the stopper 3.3 by the movement of the anchor bolt 4 relative to the base plate 1 due to the weight of the upper structure S1.

Further, in this embodiment, since the upper structure S1 is allowed to move in the direction of the elongated hole, a sliding pad 6 is also interposed between the side surfaces of the base plate 1 and the stopper 3.

In any of the above embodiments, the stopper 33 is joined to the seat plate 2 by welding or the like after the movement of the upper structure SI due to its own weight is completed.

After joining the stopper 3, the base plate 1 is fixed to the lower structure S2 by inserting the presser plate 7 into the anchor bolt 4 and tightening the nuts 1-4a from above.

The embodiment shown in FIGS. 3 and 4 is a case where the anchor 8 is joined to the lower surface of the seat plate 2, and at the same time, the lower side thereof is buried in the lower structure S2 to fix the seat plate 2 to the lower structure S2. The structure is such that the anchor 8 transmits the horizontal force of the upper structure S1 to the lower structure Sz.

3 shows a case where a stud bolt is used for the anchor 8, and FIG. 4 shows a case where a steel frame is used.

In these embodiments, the anchor 8 bears most of the horizontal force transmitted from the stopper 3 to the seat plate 2, so that almost no shearing force acts on the anchor bolt 4, and only a pulling force acts on the anchor bolt 4.

The embodiment shown in FIG. 5 is a case where the lower structure S2 is a steel frame structure, but in this case, the flange plate on the upper end side of the lower structure S2 also serves as the seat plate 2, so the stoppers 3, 3 are attached to this flange plate. directly welded to. Since the force acting on the stopper 3 is directly transmitted to the lower structure S2, the force acting on the anchor bolt 4 is only a pulling force.

FIG. 6 shows the fit when the stopper 3 is joined to the seat plate 2 in advance. In this case, the gap between the outer circumference of the base plate 1 and the inner circumference of the stopper 3, which occurs as a result of the movement of the upper structure S1 after installation of the base plate 1, is adjusted by the liner plate 9.

〔Effect of the invention〕

The present invention is as described above, and since the horizontal force of the upper structure is directly transmitted from the base plate to the anchor bolt or to the lower structure via the stopper that restrains it around the base plate and the seat plate, the anchor bolt is No bending moment is applied, and only the pull-out force, or in addition to the pull-out force, the shear force acts, and the stress generated therein can be reduced.

As a result, the diameter of the anchor bolt can be reduced, the support portion does not need to be enlarged, and its installation becomes easy.

[Brief explanation of drawings]

Figures 1 - ■ and ■ are respectively an elevational view and a plan view showing an embodiment of the present invention, Figure 2 is a plan view showing a modification thereof, and Figure 3 is a plan view showing an embodiment of the present invention.
Figure 4 is an elevational view showing an example in which an anchor is protruded under the seat plate, Figure 5 is an elevational view showing an example in which the lower structure is a steel frame structure, and Figure 6 7 is a plan view showing an embodiment in which the stopper is joined to the seed plate in advance, FIG. FIG. A: Support device, 1: Base plate, 1a: Through hole, 2: Seat plate, 2a: Through hole, 3 ...Stopper, 4...Anchor bolt, 4a...
・Natsuto, 5...Base mortar, 6...
...Sliding pad, 7...Press plate, 8
... Anchor 9 ... Liner plate, Sl ... Upper structure, S2 ... Lower structure.

Claims (2)

[Claims] (1) A device that connects a base plate that is horizontally connected to the lower end of the support member of the upper structure in a state that transmits horizontal force to the lower structure, and that covers the entire surface between the lower surface of the base plate and the upper surface of the lower structure. It consists of a seat plate that is arranged and has a larger planar area than the base plate, and a stopper that is located on both sides of the base plate in at least one direction and is fixed to the upper surface of the seat plate to restrain the horizontal movement of the base plate. A support device for a structure support, characterized in that it transmits force to a lower structure via a stopper and a seat plate. (2) The support device for a structure support portion according to claim 1, wherein a material is interposed between the lower surface of the base plate and the upper surface of the seat plate to reduce the coefficient of friction between the two.