JPS62264228A - Construction of body of multistairs building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing a frame for a multi-story building using high-strength precast (hereinafter referred to as PC) columns.

(Prior Art) Conventionally, there has been a PC construction method as a method for constructing the frame of a multi-story building. This PC construction method is a method in which 20 components such as walls, floors, and roofs are manufactured in advance in a factory and then assembled on-site, which allows for high-quality components to be obtained through factory production control, as well as shortening construction periods and making implementation easier. Facilitation can be realized,
It has the advantage of being able to reduce indirect expenses and keep total costs down.

Among these PC construction methods, there is the wall-type PC construction method in which walls, floor slabs, and partitions are constructed on-site, or the R-type construction method in which the columns and beam frames are rigid-frame structures and all or part of the members are made of PC members.
Various construction methods such as PC construction method are being implemented.

(Problems to be Solved by the Invention) However, among the structures constructed using the conventional construction method, the wall-type PC structure is structurally suitable for low-rise and middle-rise buildings, and the internal space is divided into small parts by walls, so It is not suitable for the space, and RPC structures are suitable for high-rise buildings, but because the columns are cast on-site, there are safety issues such as scaffolding in the current shortage of skilled technicians, and there are other problems, especially in the performance of cast-in-place concrete with ready-mixed concrete. There is a problem that the column strength cannot be kept constant.

Furthermore, most of the damage to high-rise buildings caused by large earthquakes is due to the collapse of column bases, and ensuring the strength of column members is an important issue, especially in high-rise buildings.

(Purpose of the Invention) The present invention was made to solve the above-mentioned conventional problems, and in particular, to ensure column strength of multi-story buildings, increase structural rigidity, and shorten the construction period. The purpose of this invention is to provide a method for constructing the frame of a multi-story building that can facilitate construction.

(Means for Solving the Problems) According to the present invention, the above-mentioned object is to provide high-strength PC columns with a cross-shaped cross section each having a height of one story in both orthogonal directions of the girder direction and the span direction. A beam and a floor slab are arranged by connecting large diameter reinforcing bars arranged at predetermined intervals and protruding in both directions orthogonal to the column head of each column body with beam main reinforcements, and furthermore, a beam and a floor slab are arranged. The large-diameter reinforcing bars that vertically penetrate the body and the large-diameter reinforcing bars of the lower PC column are joined by a splice sleeve or coupler, and the splice sleeve or sheath is filled with a filler material and tied together. This is achieved using a distinctive multi-story building frame construction method.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the PC column 10 is a high-strength PC column with a cross-shaped cross section and a height of one story.
A predetermined number of sheaths 14 are provided in the vertical direction on each projection 12 that protrudes in both orthogonal directions on the column head of the column body 10, and a predetermined number of sheaths 14 are provided in the column head of the PC column body 10 by a predetermined length from each column surface in both orthogonal directions. A predetermined number of protruding large-diameter reinforcing bars 16 for beam main reinforcements are provided in two rows, upper and lower, with intervals corresponding to the beam upper end reinforcements and the beam lower end reinforcements.

As shown in FIG. 2, the PC columns 10 formed in this manner are arranged at predetermined intervals in both orthogonal directions of the girder direction and the span direction. Next, the large-diameter reinforcing bars 18 for beam main bars are connected between the large-diameter reinforcing bars 16 for connection that protrude from each PC column body 10 . At this time, large-diameter reinforcing bars 18 for beam main reinforcement and large-diameter reinforcing bars 1 for connection
A threaded groove is provided at one end of the beam main reinforcement 1.
8 and the screw groove of the large-diameter connecting reinforcing bar 16 with a nut (
20 is a spring connection part), and the other ends are connected by gas pressure contact or the like (21 is a gas pressure contact part).

Next, as shown in Fig. 3, the main reinforcement 30 and the stirrup 31
, predetermined reinforcement such as slab reinforcement 32 is arranged, and cast-in-place concrete is placed to form the beam floor slab 28 and the beam 23.

After constructing one layer as described above, as shown in FIG. 3, the PC columns 10 are installed on top of each PC column 10 in the same manner as described above. As shown in FIG. 4, these PC columns 10 are connected to each other by inserting large-diameter reinforcing bars 22 for column main reinforcement into the lower PC column 10 in a sheath 14 provided in advance in the PC column 10.
The large-diameter reinforcing bar 22 is attached in a state protruding from the zero end surface, and the protruding portion of the large-diameter reinforcing bar 22 and the large-diameter reinforcing bar 22 of the upper layer PC column 10 are connected by a coupler 24. At this time, the upper layer PCC column 1 color and the lower layer PCC column 1 color are joined in a butt state using an appropriate adhesive 26, and then the voids in the sheath 14 of these upper and lower layers are filled without shrinkage. A filler 27 such as mortar, polymer mortar, or aramid fiber mortar is filled, and the large-diameter reinforcing bars 22 for the main bars of the PCC columns in the upper and lower layers are tied together.

Note that a splice sleeve can also be used as a method for connecting the upper and lower PC columns 1o. In this case, as shown in FIG. 5, one end of the large-diameter reinforcing bar 22 for the main column reinforcement is placed inside the splice sleeve 28, and the other end protrudes from the PC column 10. At the same time, the filler 27 is injected into the splice sleeve 28 through the injection hole 30 to integrally connect the large-diameter reinforcing bars 22 for the upper and lower column main reinforcements and the PC column 10 to each other.

Further, the upper layer PC column 10 is bonded to the lower layer PC column 10 using a suitable adhesive 26.

After constructing as described above, layers are successively stacked one after another in the same manner to construct a frame of a desired floor.

In addition, regarding the connection of the large-diameter reinforcing bars 16 for connection and the large-diameter reinforcing bars 18 for beam main reinforcement in the embodiment, one end of each is connected to each other by a nut, and the other ends are connected to each other by gas pressure welding or the like. The present invention is not limited to this, and connection can be made by any appropriate method.

Furthermore, in the embodiment of the present invention, cast-in-place concrete floor slabs are used as the floor slabs, and cast-in-place concrete beams are used as the beams, but these can also be made into PC floor slabs and PC beams, respectively. Furthermore, a PS steel bar may be used as the main column reinforcement of the PC column. When using a PC beam, as shown in FIG.
The other end is gas pressure welded (38 is the gas pressure welding part)
It is preferable to join with.

(Effects of the Invention) As explained above, the construction method of the present invention connects the large-diameter reinforcing bars of a high-strength PC column with a cross-shaped cross section to each other using splice sleeves or couplers. Since the inner column is filled with a filler material to integrally connect the upper and lower column main reinforcing bars and the PC columns, it is possible to obtain a frame having columns with high strength and excellent stability. Additionally, this framework construction method has the advantage of being relatively unaffected by the skill of the worker and allows for easy work, and by using 20 members for beams, floor slabs, etc., the construction period can be further shortened. It is possible to aim for

Furthermore, the PC column of the present invention is formed into a cross-shaped cross section so that the cross-sectional shape itself has stability, and after construction, the protruding portion of the cross-shaped cross section is spatially connected to the beam or wall. Since it functions as a part of the column, it is possible to effectively utilize indoor space while ensuring column strength and stability.

[Brief explanation of drawings]

Figure 1 is a perspective view and top view of the PC pillar of this embodiment, and Figure 2 is a
The figure is a plan view showing the construction status of the PC columns and beam main reinforcements.
The figure is a longitudinal sectional view taken along the line A-A in Fig. 2, Fig. 4 is a sectional view showing how the PC pillars are connected to each other using a cuff puller, and Fig. 5 is a sectional view showing how the pillars are connected to each other using a splice sleeve. , FIG. 6 is a diagram showing the connection between the PC column and the PC beam. 10... PC column body, 12... Projection, 14... Sheath, 16... Large diameter reinforcing bar for connection, 18... Large diameter reinforcing bar for beam main reinforcement, 22... Thick diameter reinforcing bar for column main reinforcement diameter reinforcing bar, 24... coupler, 27... filler, 28... splice sleeve, 32... PC beam. Agent Patent Attorney Jo Taira Yamashita Figure N2 Figure 3 Figure N4

Claims (3)

[Claims] (1) High-strength PC columns with a cross-shaped cross section each having a height of one story are arranged at predetermined intervals in both orthogonal directions of the girder direction and the span direction, and are arranged at predetermined intervals in both orthogonal directions to the column head of each column. Beams and floor slabs are arranged by connecting the large-diameter reinforcing bars provided so as to protrude with beam main reinforcements, and furthermore, the large-diameter reinforcing bars that vertically penetrate the PC column and the large diameter of the lower PC column are connected. A method for constructing a frame for a multi-story building, characterized in that reinforcing bars are joined with a splice sleeve or a coupler, and a filler is filled in the splice sleeve or sheath to bind them together. (2) The method for constructing a frame of a multi-story building as set forth in claim 1, wherein the beam or floor slab is constructed by pouring cast-in-place concrete. (3) The framework construction method according to claim 1, wherein the beam or floor slab is a PC structure.