JPH0213111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing a steel column and a steel beam in a building.

(Prior Art) Conventionally, in the steel frame of columns and beams, brackets 11,
Lift and erect the pillar steel frame 12 protruding from...
Thereafter, the beam steel frame 13 was lifted between the brackets, and this beam was set between the brackets to connect them to each other.

(Problem to be Solved by the Invention) According to the conventional example, the column steel frame 12 and the beam steel frame 13 are each lifted separately, so the lifting efficiency is poor, and the construction period and cost are increased accordingly. there was. In addition, there is a lot of welding work, as it requires factory welding of the brackets to the column steel frames and on-site welding of the brackets to two locations on both ends of the beam steel frames.
It was time consuming.

The purpose of the present invention is to make it possible to simultaneously lift column steel frames and beam steel frames to increase lifting efficiency, shorten the construction period, and reduce costs accordingly.Another purpose of the present invention is to reduce the number of welded parts. The purpose is to save labor.

(Means for Solving the Problems) The present invention is characterized by a column steel frame 1 and a 1/2 structure which is swingably suspended from the column steel frame 1 by a connecting means C and is closed along the column steel frame. Lift the beam steel frame 2 with the length of the span at the same time, erect the column steel frame, swing the beam steel frame from the column steel frame, protrude from the column steel frame, and connect the beam steel frames of the adjacent column steel frames to the center of the beam. The point is to connect them with .

(Function) In the present invention, the column steel frame 1 and the beam steel frame 2 can be lifted simultaneously. Since the two beam steel frames are joined together at the center of the beam, only one welding point is required on the beam.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG. 1, FIG. 2, and FIGS. 3A to 3D.

As shown in Fig. 1, in advance, the inner ends of the upper sides of the beam steel frames 2, 2a having a length of 1/2 span are connected to the flange 1A of the column steel frame 1 and the web 1B by connecting means C so that they can swing in the direction of the arrow. Temporarily tighten and close the beam steel frame along with the column steel frame.

In addition, it is desirable that the lower end portions of the flanges of the beam steel frames 2 and 2a, which are close to the column steel frame 1, be temporarily fixed at the factory for curing during erection. this is,
This is because the position of the beam steel frame 2 is stabilized when the column steel frame 1 is lifted.

To explain the specific structure of the above-mentioned connecting means C, as shown in FIGS. 1 and 2, a front hook-shaped receiving plate 5 protrudes from the flange 1A of the column steel frame 1 and is welded to the flange 1A. A rod 6 made of round steel is fixed to the lower surface of the flange 2A on the lower side of the beam steel frame 2 by welding, and the rod 6 is rotatably engaged with the bent inner side of the receiving plate 5. , beam steel frame 2
is suspended from the receiving plate so as to be swingable about the rod 6.

In the erection process, first, as shown in Figure 3A, with the beam steel frame 2 suspended parallel to the column steel frame, the column steel frame and the beam steel frame are simultaneously lifted using a tower crane, and this column steel frame is Then, as shown in Fig. 3B, the beam steel frame 2 is swung in the direction of the arrow so as to be pushed out at right angles to the column steel frame 1, and the flange 1A and web 1B of the column steel frame are attached as shown in Fig. 1. The beam steel frames are temporarily connected using the protruding gusset plates 3, 3a, bolts and nuts, and then the beam steel frames of adjacent column steel frames are connected at the center of the beams. In addition, in the case of a normal span (approximately 5 to 8 m), the moment at the center of the beam is only a long-term load and is small, so only a web joint is required, and end welding may be performed only on site.

After swinging the beam steel frame 2 in this way, temporarily fixing the webs at the center of the beam, and correcting the distortion as shown in Figure 3C, the column steel frame 1 and the beam steel frame 2 are fully tightened, and the beam steel By welding the flange ends, a steel frame structure as shown in Fig. 3D is completed.

In the above example, since the connecting means consists only of the receiving plate 5 and the rod 6, the number of parts is small and the configuration is simple. Therefore, the welding work for these column steel frames 1 and beam steel frames 2 is also similar to that for conventional column steel frames. This is simpler than welding the bracket.

(Effects of the Invention) As described above, according to the present invention, since the column steel frame and the beam steel frame can be lifted simultaneously, the lifting work can be done only once, and the number of lifting operations can be minimized. It is possible to shorten the construction period and reduce costs accordingly. Since the beam only needs to be welded at one point in the center of the beam, excluding the end facing the column steel frame, welding labor can be reduced compared to the conventional example.

[Brief explanation of drawings]

Fig. 1 is a front view showing a beam steel frame suspended from a column steel frame, Fig. 2 is an enlarged front view showing a means for connecting the column steel frame and beam steel frame, and Figs. 3A to 3D are constructions according to the present invention. FIG. 4 is a schematic diagram showing one step of the construction process in a conventional example, and FIG. 5 is a schematic diagram showing a conventional steel frame structure in a plan view. 1...Column steel frame, 1A...flange, 2, 2a...
...beam steel frame, 2A...flange, 5...receiving plate, 6...rod, C...connection means.

Claims (1)

[Scope of Claims] 1. At the same time, a column steel frame and a beam steel frame with a length of 1/2 span, which is swingably suspended from the column steel frame by a connecting means and closed along the column steel frame. Lift and load;
A method of constructing a column steel frame and a beam steel frame, characterized in that a column steel frame is erected, the beam steel frame is swung from the column steel frame to a horizontal state, and the beam steel frames of adjacent column steel frames are joined at the beam center. . 2. The column according to claim 1, wherein the connecting means is a rod fixed to the beam steel frame and rotatably engaged with a receiving plate provided on the column steel frame. Steel frame and beam steel frame construction methods.