Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of reinforcing opening of steel frame girder

A technology of steel frame beams and construction methods, applied in the direction of building reinforcements, joists, girders, etc., can solve the problems of inability to install, complex shapes of reinforcement plates, and difficult installation at the same time, achieving a large strengthening effect, safe and simple structural endurance , the effect of increasing the degree of freedom

Active Publication Date: 2008-07-09
ISHIHARA KK
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the reinforcement plates 52 and 53 described in Patent Document 1 have complicated shapes.
Furthermore, it is difficult to install the reinforcing plates 52, 53 and the gasket 54 simultaneously by one operator, and the installation cannot be performed unless two or more persons are working on the side and the inside of the beam.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of reinforcing opening of steel frame girder
  • Method of reinforcing opening of steel frame girder
  • Method of reinforcing opening of steel frame girder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Hereinafter, the first embodiment of the present invention is based on Figure 1 to Figure 6 Be explained. First, a circular opening 1B is opened in the middle portion of the web 1A of the steel frame girder 1 which is a reinforced base material having an H-shaped cross-sectional shape. Next, in the strengthening operation, under the condition that the steel frame beam 1 is kept upright without falling down, the central pipe 3 of the hollow cylindrical shape (refer to Figure 5 ), inserted into the opening 1B of the beam web 1A.

[0039] Then, one pair of reinforcing steel plates 2, 2 (referring to Figure 4 ), the screw grooves 2A formed on the edge of the opening are screwed to the screw grooves 3A of the central pipe 3 from the outside to clamp the beam web 1A.

[0040] Then, a plurality of (for example, 1 per 180 degrees, 2 in total) axial force introduction holes 5, 5 provided on the aforementioned reinforced steel plates 2, 2 are inserted into clamps and other ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention provides a method of reinforcing an opening of a steel frame girder by which a degree of freedom in the design and construction is improved, and a better reinforcing effect is obtained while being safe and simple in terms of structural resistance. A center tube 3 is inserted into an opening 1B of a girder web 1A while keeping the steel frame girder 1 erected. Threaded grooves 2A formed in an edge part of the opening are threadably fitted to threaded grooves 3A of the center tube 3, and a pair of reinforcing steel plates 2, 2 are attached to the center tube 3 in a manner of sandwiching the girder web 1A. Then, an auxiliary force applicator like a jig is inserted into and axial force introduction holes 5, 5 of the reinforcing steel plates 2, 2. In a state where one reinforcing steel plate 2 is fixed, a larger force is introduced by applying a load in a rotational axial force direction to rotate the other reinforcing steel plate 2 so that the girder web 1A and the pair of reinforcing plates 2, 2 may be friction-welded to each other. The auxiliary force applicator is pulled out of the axial force introduction hole 5, the hole 5 is plug welded, and the reinforcing plates 2, 2 and the girder web 1A are fixed further.

Description

technical field [0001] The invention relates to a construction method for opening reinforcement of a steel frame beam. Background technique [0002] Generally, the beam web of the steel frame girder is provided with through holes for various piping and wiring, and a reinforcing device is added to the opening of the beam web to compensate for its cross-sectional defect. As the opening reinforcing means of the beam web, there is an annular reinforcing plate (for example, refer to Patent Document 1) and the like. That is, Patent Document 1 discloses a technique of inserting an externally threaded cylindrical portion 52a protruding from the center hole portion of the annular reinforcing plate 52 shown in FIG. 13 into the web opening 51 of the steel frame beam 50. , and the internally threaded cylindrical portion 53a protruding from the center hole of the other annular reinforcing plate 53 is inserted into the web opening 51 from the other side, and is screwed with the aforement...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/08E04G23/02E04B1/00E04C3/04E04C5/08E04G21/00E04G23/00
CPCE04G23/0218E04C2003/0452E04G23/0244
Inventor 石原正己
Owner ISHIHARA KK