JPH05248009A - Lift up method for framed girder - Google Patents

Abstract

(57) [Abstract] [Purpose] A frame beam to be connected between the tops of a pair of frame columns,
The rigid frame structure is maintained by both, without being deformed, and safely raised along the frame columns. [Structure] The dampers 4 set at both ends of the frame beam 3 are
While elastically pressingly engaging each frame column 2, the frame beams 3 are raised along each frame column 2 by the tension rods 13 loaded with jacks. The frame columns 2 and the frame beams 3 form a rigid frame structure that is stress-coupled via a damper 4, preventing buckling of the frame columns 2 and overall deformation.
It can be safely raised.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when constructing a building such as a building, raises a frame beam to be bridged and connected between the tops of a pair of standing frame columns along the frame column. The present invention relates to a method of lifting up a frame beam used for making it.

[0002]

2. Description of the Related Art As an initial stage of building a building, a plurality of frame columns are erected on a foundation built on the ground.
A frame beam such as a truss beam may be spanned between the tops of these frame columns to be connected to form a ramen structure. In order to raise the frame beams to the top of the frame columns, a method is generally adopted in which the beams are suspended from the tops of the pair of frame columns that bridge the frame beams, while maintaining the horizontal state of the frame beams.

When raising the frame beam in this way,
In order to prevent buckling of the frame columns due to the load of the frame beams and overall deformation due to horizontal force applied by wind, earthquake, etc., increase the cross-sectional area of the frame columns to increase the rigidity of the frame columns. Alternatively, the frame columns have a highly rigid core structure.

[0004]

In the means for improving the rigidity of the frame column as described above, if the site is limited, the cross-sectional area of the frame column may not be increased as desired. In addition, there are cases where the core structure cannot be constructed due to the floor plan of the building. That is, due to various restrictions, it may not be possible to improve the rigidity of the frame column.

Therefore, if the frame beam is always brought into contact with the frame column and the frame beam is lifted while maintaining the rigid frame structure under stress, the frame column can be formed without increasing the rigidity of the frame column. It is assumed that the frame beam can be raised in a stable state without causing deformation. However, at present, there is no technology that specifically realizes such means, and the development thereof has been desired.

The present invention has been made in view of the above circumstances, and a frame beam connected between the tops of a pair of frame columns can be safely held in a frame frame while maintaining a rigid frame structure by both of them. It is an object of the present invention to provide a method for lifting a frame beam to raise it along a road.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and between a pair of vertically installed frame columns, frame beams connected to the tops of these frame columns are connected to each frame column. A method of lifting up a frame beam, which comprises a damper having a predetermined elasticity that elastically presses and engages mutually opposing surfaces of the frame columns to the frame beam. It is characterized in that the frame beams are raised along the frame columns by the lifting device while being elastically pressed and engaged with the frame columns.

[0008]

According to the method of lifting the frame beam of the present invention,
Each frame column and frame beam form a rigid frame structure that is stress-coupled via a damper, and therefore buckling of the frame column during the ascending of the frame beam is prevented. Further, when a horizontal force is applied by a wind or an earthquake, the frame beams are connected to the frame columns in a rigid frame structure that acts like a rigid state, and there is no risk of deformation of the whole structure.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to building construction will be described below with reference to the drawings.

First, as shown in FIG. 1, a frame beam 3 having a truss structure is assembled on a foundation 1 constructed on the ground and between the standing portions of a pair of frame columns 2 which will be described later.

Next, as shown in FIG. 2, the frame columns 2 forming the corners of the building are respectively erected at the above-mentioned erected positions laterally of both ends of the frame beam 3. The erection of the frame columns 2 is performed by a crane installed on the frame beams 3 or a tower crane installed outside (both not shown).

6 and 7 are provided at both ends of the frame beam 3.
Set the damper 4 shown in. The damper 4 includes a cylindrical damper main body 5, a piston 6 extending from one end of the damper main body 5 and elastically and elastically fitted to the damper main body 5, and a stay 7 at the other end of the damper main body 5. It is composed of a pair of rollers 8 which are rotatably mounted via. Each roller 8 is coaxially arranged at the tip of each stay 7, and each stay 7 is detachably attached to the damper body 5.

The damper 4 is attached to a bracket 9 provided slightly inside the end of the upper surface of the frame beam 3 with the axis of each roller 8 being horizontal, and the tip of the piston 6 is attached to the bracket 9. Pin connection is performed through a horizontal shaft 10 that is orthogonal to the length direction. That is, the damper 4 has a horizontal axis 10 along the vertical plane.
It is freely rotatable around. Then, in a free length state, when the damper 4 is directed to the outside of the frame beam 3 and the axial direction (extending direction of the piston 6) of the damper 4 is set in a horizontal state along the length direction of the frame beam 3, Stay 7 and each roller 8
, But protrudes outward from the end of the frame beam 3.

When the pair of frame columns 2 have been installed upright, as shown in FIGS. 6 and 7, the guide rails 11 having a T-shaped cross section made of steel or the like are provided on the mutually facing surfaces 2a of the frame columns 2. Are attached along the frame columns 2, respectively. The guide rail 11 includes a flange 11a and a web 11b, and the tip of the web 11b is attached to the center of the facing surface 2a in the width direction. Therefore, the facing surface 2 a and the guide rail 11 form a pair of vertically extending grooves 12.

The guide rail 11 is used for the frame 2
It may be installed at the same time as standing.

Now, a method for actually raising the frame beam 3 will be described.

First, as shown in FIGS. 6 and 7, from the state where the stays 7 of the dampers 4 set at both ends of the frame beam 3 to which the rollers 8 are attached are removed from the damper main body 5, respectively. After the damper 4 is set in the horizontal state as described above, the damper main body 5 is appropriately moved in the inward direction of the frame beam 3 against the elasticity of the damper main body 5, and each roller 8 is fitted into the groove 12 respectively. Each stay 7 is fixed to the damper body 5.

As a result, each roller 8 is elastically pressed and engaged with the facing surface 2a of the frame column 2 by the action of the damper body 5 and the piston 6 which exert a reaction force on the bracket 9. In other words, both ends of the frame beam 3 elastically engage with the frame column 2 via the damper 4.

Next, as shown in FIG. 3, lift jacks (not shown) are attached to the tops of the frame columns 2 and both ends of the frame beams 3.
Connected with a tension rod (lifting device) 13 equipped with
The frame jack 3 is raised by the lift jack while maintaining the horizontal state.

When the frame beam 3 is raised, the damper 4 is press-engaged with the facing surface 2a of the frame column 2 as described above.
The frame columns 2 and the frame beams 3 form a rigid frame structure in which they are stress-coupled via a damper 4, and therefore the frame beams 3
The buckling of the frame columns 2 during the ascent of the frame columns is prevented, and when a horizontal force is applied by wind, an earthquake, etc., the connection of the frame beams 3 to the frame columns 2 becomes a rigid frame structure that exhibits an action close to a rigid state, There is no risk of deformation.

When the frame beam 3 is raised to some extent as described above, the floor 14 and the pillar 15 on the intermediate floor are built in the space below the frame beam 3 as shown in FIG. And
Ascending of the frame beam 3 and building of the floor 14 and the pillar 15 are repeated, and finally, as shown in FIG. 5, both ends of the frame beam 3 are connected to the top of the frame column 2 and the floor 14 is placed in the space below it. And the pillar 15 is built. When building the floor 14, the damper 4 is set on the edge facing the frame 2 to
Is also elastically pressed into engagement with the frame column 2.

According to the method of raising the frame beam 3 along the pair of frame columns 2 of the present embodiment, as described above,
Buckling of the frame columns 2 during the ascending of the frame beams 3 is prevented, and even if a horizontal force is applied by wind, an earthquake, etc., there is no risk of the entire structure being deformed, and the frame beams 3 can be safely raised. it can. The damper body 5 of the damper 4
It is preferable that the damping material loaded in (1) has a predetermined viscoelasticity, which has a large resistance to abrupt displacement and follows it to a slow displacement.

Further, in the case of this embodiment, even if each frame column 2
Even when the vertical accuracy is low and the distance between the two is not constant, the damper 4 expands and contracts according to the distance, and the rollers 8 are constantly pressed and engaged with the facing surfaces 2a. Therefore, the frame structure composed of the frame columns 2 and the frame beams 3 is always maintained, and there is no possibility that the frame beams 3 cannot be lifted due to the narrow distance between the frame columns 2.

Further, even if the length of the frame beam 3 changes due to temperature change, the expansion and contraction of the damper 4 always causes the frame beam 3 to move.
Presses and engages with each frame pillar 2 via a damper 4,
The ramen structure is retained.

In the above embodiment, the dampers are set at both ends of the frame beam, but the setting position of the damper with respect to the frame beam and the structure of the damper are limited to those in the above example. However, various cases and structures are applied according to design requirements.

[0026]

As described above, according to the method for lifting up a frame beam of the present invention, between the pair of erected frame columns, the frame beams connected to the tops of these frame columns are connected to each frame column. A method of lifting up a frame beam, which comprises a damper having a predetermined elasticity that elastically presses and engages mutually opposing surfaces of the frame columns to the frame beam. It is characterized in that the frame beams are lifted along each frame column by the lifting device while being elastically pressed and engaged with the frame columns, and each frame column and frame beam is stressed through a damper. Has a ramen structure connected to
Therefore, buckling of the frame columns during the ascending of the frame beams is prevented, and when horizontal force is applied by wind, earthquake, etc., the connection of the frame beams to the frame columns becomes a rigid frame structure that exhibits an action close to a rigid state, As a result, there is no risk of the entire structure being deformed, and as a result, it is possible to safely raise the frame beams along the frame columns.

[Brief description of drawings]

FIG. 1 is a front view of the first stage of the procedure in one embodiment of the method of the present invention.

FIG. 2 is a front view of the same second stage.

FIG. 3 is a front view of the same third stage.

FIG. 4 is a front view of the fourth stage.

FIG. 5 is a front view of the fifth stage.

FIG. 6 is a side view showing a state in which the damper is set on the frame beams and frame columns.

FIG. 7 is a plan view of the same.

[Explanation of symbols]

 2 Frame pillar 2a Opposing surface 3 Frame beam 4 Damper 13 Tension rod (lifting device)

Claims (1)

[Claims] 1. A method of lifting a frame beam between a pair of vertically-arranged frame columns, the frame beams being connected to the tops of the frame columns being raised along each frame column. , A damper having a predetermined elasticity that is elastically pressed and engaged to the mutually facing surfaces of the frame columns is set, and while the damper is elastically pressed and engaged to the frame columns, the frame beam is lifted by the lifting device. A method for lifting up a frame beam, which comprises raising each structure column along the columns.