JPH0657967A - Framing method of building capable of reusing pc member - Google Patents

Abstract

PURPOSE:To cut and dismember the existing structure unapplicable to needs and reuse the main structural members such as columns, beams, etc., for a new building. CONSTITUTION:In the beginning of construction of a building, PC steel materials 2 are inserted in a PC girder A manufactured by providing a plurality of insertion holes of the PC steel materials or sheaths 1 ' to a column A and a beam D and are tensed. When the existing framing constructed by introducing prestress to a concrete skeleton of the building is reused, the column D and girder A of the same existing framing are cut off at good positions X-X' and Y-Y', and PC steel materials 2' are inserted into auxiliary insertion holes provided in expectation of reusing in PC members reused for a new structure. In the column D, the PC steel materials 2 are inserted over the overall length of the column and foundation and are tensed, and in the girder A, the PC steel materials 2 are inserted over the overall length of the beam spanning the external end of the column A to introduce the prestress to the framing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method of a building that enables reuse of PC members.

[0002]

2. Description of the Related Art Methods for constructing building frames by introducing columns, beams and prestresses of precast concrete have been widely practiced.

[0003]

The life cycle of buildings is becoming shorter year by year. The main reason is that it has become unsuitable for the needs of the new era in terms of the uses and functions of buildings. However, the life of the skeleton of a building is 60 to 100 years, or there are many cases where it can be used semipermanently.

The present invention has been proposed under such a background, and the purpose thereof is to cut and dismantle a structural body that is no longer suitable for the needs, and particularly main structural members such as columns and beams. The point is to provide a building frame method that can be reused as a new building.

[0005]

In order to achieve the above-mentioned object, according to the frame construction method of the present invention, at the beginning of the construction of the building, the reuse of the pillar beam member is predicted and the insertion for the main steel material is performed. When reusing an existing frame constructed by inserting a PC steel material into a PC member made by providing multiple through holes and tensioning it, and introducing prestress into the concrete frame, the columns and beams of the existing frame are specified. In the PC member that is cut at the length position and reused as a new structure, insert the PC steel material into the spare through hole that was provided in anticipation of reuse, and in the pillar, the full length of the pillar and the foundation In the beam, the PC steel material is inserted and tightened over the entire length of the beam straddling the outer end of the column to introduce prestress to the frame.

[0006]

According to the present invention, as described above, a plurality of through holes for main steel, including spare parts, are prepared at the beginning of building construction in anticipation of reuse of pillar and beam members. PC to PC member
When a member is inserted, strained, and prestress is introduced into the frame to build a frame structure, and when a new frame structure is needed for the existing building, the existing frame structure The pillar beam is cut at a predetermined length position, the PC steel material is inserted through the through hole provided in the front of the pillar beam to be reused, and the pillar extends over the entire length of the pillar and the foundation, and the beam is A new PC steel material is penetrated over the entire length of the beam and the outer end column to make it tense, or by connecting a newly produced PC member between columns and columns for reuse. Prestress is introduced into the frame by inserting and tightening the PC steel material.

[0007]

The present invention will be described below with reference to the illustrated embodiments. A is a PC girder manufactured at the beginning of construction, B is a PC column, and a plurality of PC steel material through holes or sheaths 1 are arranged in the PC girder A. The PC steel material 2 is inserted and tightened, and prestressed is introduced into the girder frame.

The PC steel material through hole or the sheath 1 is provided with an extra spare PC steel material through hole or sheath 1'of the cavity in consideration of reuse. P for reuse
The C steel material through hole 1 or the sheath is filled with a viscous material 3 such as grease after the prestress is introduced, or is unbonded after the prestress is introduced. (See FIGS. 2 and 3) When the member is reused without exceeding the service life, the PC girder A is cut at a required position as indicated by XX ′ to prepare a spare or unused PC. PC steel material is inserted and tightened in the steel material through hole or sheath 1 ', or the PC steel material through hole of the existing PC girder A or the used PC in the sheath
The steel material 2 and the viscous material 3 are removed, and a newly manufactured PC member C is interposed between the reused PC girder A and PC pillar B,
In the same manner as above, the new beam P, the newly-fabricated PC member C, and the column B of the PC steel material through-holes or sheath 1'are provided.
Insert and tighten C steel material 2 '. In the figure, 4 is a bracket, 5 is a mortar, an epoxy resin and other adhesives. (Fig. 2
5 and 6 show a case where the present invention is applied to the PC pillar D, and when the PC pillar D is reused, the PC pillar D is cut along a cutting line YY ', and the reuse pillar D is used in the same manner as described above. A newly-produced PC member C'is interposed between the column and the column D ', and the PC steel material is inserted into the PC steel material through hole or the sheath of each of the above-mentioned portions and tightened to introduce prestress into the frame.

Thus, according to the present embodiment, the PC member is optimally used in a new building to deal with building uses such as floor height and span.

[0010]

As described above, according to the present invention, it is possible to reuse the PC member for a new building and to cope with the change of the building size such as the floor height and the span, thereby eliminating the waste of resources. It is possible to reduce construction waste. Further, since the precast member has high strength, it can be sufficiently reused.

[Brief description of drawings]

FIG. 1 is a front view showing a frame composed of precast concrete girders and columns.

FIG. 2 is a vertical cross-sectional view showing an arrangement example of PC steel material through holes of a large beam.

FIG. 3 is a vertical sectional view showing another embodiment of FIG.

FIG. 4 is a front view showing a state when the girder is reused.

FIG. 5 is a front view of a precast concrete column.

FIG. 6 is a front view showing a state when both of the columns are used.

[Explanation of symbols]

 A PC girder A ′ Girder for reuse B PC column B ′ PC column for reuse C Newly produced PC member C ′ Newly produced PC member D PC column D ′ PC column for reuse 1 PC steel through hole or Sheath 2 PC Steel 3 Viscous 4 Bracket 5 Mortar

Claims (1)

[Claims] 1. A PC member manufactured by inserting a plurality of penetration holes for a main steel member into a PC member at the beginning of building construction in anticipation of reuse of the beam member, and then tensioning the PC member by inserting the PC member into the PC member. When reusing an existing frame constructed by introducing stress into the concrete frame, the pillars and beams of the existing frame are cut at specified lengths and the reuse of PC members reused as a new structure is predicted. Insert the PC steel material into the spare insertion hole provided by
Pre-stress is introduced into the frame by inserting and tightening the PC steel material over the entire length and the foundation of the column and over the entire length of the beam over the outer end of the column.
A building frame method that allows the reuse of C members.