WO2001020089A1 - Structure de beton et procede de construction - Google Patents

Structure de beton et procede de construction Download PDF

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Publication number
WO2001020089A1
WO2001020089A1 PCT/JP1999/004954 JP9904954W WO0120089A1 WO 2001020089 A1 WO2001020089 A1 WO 2001020089A1 JP 9904954 W JP9904954 W JP 9904954W WO 0120089 A1 WO0120089 A1 WO 0120089A1
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WO
WIPO (PCT)
Prior art keywords
reinforcing bar
steel
frame
precast
concrete
Prior art date
Application number
PCT/JP1999/004954
Other languages
English (en)
Japanese (ja)
Inventor
Kazunori Kono
Hidekimi Imanishi
Minoru Tabata
Tatsuya Ueda
Original Assignee
Maeda Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maeda Corporation filed Critical Maeda Corporation
Priority to PCT/JP1999/004954 priority Critical patent/WO2001020089A1/fr
Publication of WO2001020089A1 publication Critical patent/WO2001020089A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings

Definitions

  • the present invention relates to a steel-frame concrete structure, and more particularly to a concrete structure excellent in quickness and safety of construction and a method of constructing the same. Background technology
  • the conventional construction method is as follows. First, a number of main reinforcing bars are erected from the foundation, and the belt reinforcing bars are fixed so as to surround the main reinforcing bars. When fixing the belt reinforcing bar, it is fixed to the main reinforcing bar manually using a binding wire or the like.
  • a concrete formwork is set up around the rebar by attaching supports. After completion of the formwork, concrete is poured into the formwork, and after curing, the formwork and support are dismantled and removed. A series of operations consisting of such steps are repeatedly performed as many times as necessary.
  • assembling the rebar may be a work at height, which reduces safety and workability.
  • An object of the present invention is to solve such a problem, and an object of the present invention is to provide a concrete structure and a method of constructing a concrete structure that can easily assemble a reinforcing bar and can shorten a period by removing a mold. To provide.
  • Another object of the present invention is to provide a method for constructing a concrete structure capable of ensuring work safety and improving the covering accuracy of concrete and the assembling accuracy of reinforcing bars. Disclosure of the invention
  • the present invention provides a step of forming a foundation by building a steel frame to a required height, a step of forming a frame-shaped form member in which a reinforcing bar is arranged via a reinforcing bar mounting tool, and surrounding the steel frame.
  • This is a method of constructing a concrete structure with and.
  • Reinforcing bars can be arranged by a method of arranging a reinforcing bar assembly on the inner surface of the form member and fixing the reinforcing bar to the reinforcing bar assembly.
  • a reinforcing bar and a steel material are arranged so as to be alternately stacked with a space therebetween, and the reinforcing bar is fixed to a reinforcing bar assembly material arranged on the inner surface of the form member, and the steel material is a formwork. It may be fixed in the transverse direction of the member.
  • the steel member protects the formwork member from deformation due to external pressure. Therefore, in the work of stacking the form members, the form members are prevented from being deformed.
  • reinforcing bar a band reinforcing bar and an intermediate reinforcing bar can be used.
  • the band reinforcement is also called a shear reinforcement and has a bar-shaped or plate-shaped cross-section. Since the reinforcement is installed away from the side of the formwork, it is desirable to fix the reinforcement through a band reinforcement.
  • band Casting concrete without placing the rebar in contact with the steel (steel or rebar) installed inside.
  • an L-angle, small H steel, or the like can be used as the band reinforcing bar, and supports the band reinforcing bar and forms an appropriate gap between the formwork and the band reinforcing bar. After casting concrete, this gap becomes concrete cover.
  • the steel frame is preferably an H-beam, but other shapes such as an L-beam may be used, which connect to a steel frame or anchor protruding from the top surface of the foundation.
  • projections are provided on the flange surface of steel frame, etc., the adhesion of concrete is improved, and the integrity with concrete is obtained. This projection may be formed on the surface in the manufacturing stage, not to mention a post-installed one.
  • the precast formwork is constituted by a precast outer frame member arranged outside the steel frame, and a precast inner frame member arranged on the ⁇ side of the steel frame.
  • the concrete frame can be built by attaching the frame for use and the reinforcing bar to one or both of the precast outer frame member and the precast inner frame member.
  • the form member is usually manufactured in a factory or the like and assembled on site. After the cast-in-place concrete is hardened, it will be part of the structure without demolding. The surface may be decorated or left alone. Since this formwork member is an industrial product, it is possible to secure the durability of the structure constructed using the formwork member and to improve the appearance at the factory manufacturing stage.
  • the mold member may a water-cement ratio Ca s 2 0 ⁇ 6 0% of cementitious mortars and child.
  • a mortar having such a low water cement ratio is used, resistance to corrosion factors such as salt, carbon dioxide, oxygen, and water is increased, and the durability of the structure can be improved.
  • the mortar mold member one containing one or two or more reinforcing materials selected from the group consisting of steel fiber, stainless fiber, aramid, vinylon, carbon fiber, and glass fiber is preferably used.
  • Can be Aramid is aromatic It is a polyamide fiber and has a tensile strength more than 5 times that of iron.
  • the carbon fiber for example, a polyacrylonitrile-based carbon fiber made of graphite-like carbon can be used.
  • FIG. 1 is a sectional view of a pier constructed by the method of the present invention.
  • FIG. 2 is a perspective view showing a semi-finished state of a pier constructed by the method of the present invention.
  • FIG. 3 is a diagram showing a part of the inner side surface of a form member to which a band reinforcing bar is attached.
  • FIG. 4 is a side view of a form member to which a band reinforcing bar is attached.
  • FIG. 5 is a conceptual diagram of a form member to which a reinforcing material is added.
  • FIG. 6 is a flowchart showing a construction order in the second embodiment.
  • FIG. 7 is a sectional view of a pier according to the second embodiment.
  • Figure 8 is a diagram showing the installation of a steel frame.
  • FIG. 9 is a cross-sectional view showing a state in which footing has been formed.
  • FIG. 10 is a cross-sectional view showing a step of stacking the form members.
  • FIG. 11 is a cross-sectional view showing a state in which concrete has been poured into formwork ⁇ to form the foundation of the pier.
  • FIG. 12 is a cross-sectional view showing a state where a steel frame is added.
  • FIG. 13 is a cross-sectional view showing a state in which mold members are stacked on a foundation.
  • FIG. 14 is a cross-sectional view showing a state in which the precast inner forms are stacked.
  • FIG. 15 is a cross-sectional view showing a state in which reinforcing bars are arranged.
  • FIG. 16 is a cross-sectional view showing a state in which a concrete is cast in a Brecast formwork.
  • Figure 17 is a cross-sectional view of the completed pier.
  • FIG. 18 is a diagram showing a state where a mesh reinforcing bar is fixed to the inner frame.
  • FIG. 19 is a diagram showing a state in which a belt reinforcing bar is fixed to the inner frame.
  • FIG. 20 is a diagram showing a state where the outer frame is attached.
  • FIG. 21 is a diagram showing a state where a reinforcing bar is attached to the outer frame.
  • FIG. 22 is a diagram showing a state where an intermediate reinforcing bar is attached.
  • FIG. 23 is a flowchart showing a construction order in the third embodiment.
  • FIG. 24 is a diagram showing the construction order in the third embodiment.
  • (b) is the footing construction
  • (c) is the installation of formwork members
  • (d) is the placement of concrete
  • (e) is the diagram showing the completed pier.
  • FIGS. 25A and 25B are views showing a mold member, wherein FIG. 25A is a plan view thereof, FIG.
  • (c) is a side view thereof.
  • Fig. 26 is a diagram showing the order of assembling the reinforcing steel and copper material in the formwork member, (a) showing the state where the steel material is arranged inside, and (b) showing the state where the reinforcing steel is fixed to the steel material.
  • (c) is a diagram showing a state in which a shape-retaining steel material is arranged
  • (d) is a diagram showing a formwork member completed by laminating a reinforcing bar and a steel material.
  • FIG. 27 is a perspective view of a pier in the middle of construction according to the third embodiment.
  • FIG. 28 is a diagram showing the position of the load P in Test Example 1.
  • FIG. 29 is a cross-sectional view of the specimen 1.
  • FIG. 30 is a cross-sectional view of the test piece 2.
  • FIG. 31 is a cross-sectional view of the test piece 3.
  • FIG. 32 is a diagram showing cracks of the test piece 1 to which the load P is applied.
  • FIG. 33 is a diagram showing cracks of the test piece 2 to which the load P is applied.
  • FIG. 34 is a diagram showing cracks of the test piece 3 to which the load P is applied.
  • FIG. 35 is a diagram showing the crack width of the test pieces 1 to 3 in the bending-shear test.
  • C Fig. 36 is a view showing the toughness factor of the test pieces 1 to 3 in the bending-shear test.
  • FIG. 37 is a cross-sectional view showing the structure of the test piece 4.
  • FIG. 38 is a cross-sectional view showing the structure of the test piece 5. As shown in FIG.
  • FIG. 39 is a diagram showing an apparatus for performing Test Example 2.
  • FIG. 40 is a diagram showing the horizontal displacement of the specimen 4 at the unloading point.
  • FIG. 41 is a diagram showing the horizontal displacement of the specimen 5 at the unloading point.
  • FIG. 42 is a diagram showing the relationship between the load and the displacement of the test pieces 4 and 5.
  • a plurality of annular formwork members 1 are stacked to form a pier A in which the surface of the precast formwork 9 becomes an outer wall.
  • a cylindrical precast material 7 made of concrete is provided inside the laminated annular form member 1.
  • the precast material 7 and the steel frame 4 are erected in the center of the foundation 2 before performing the following construction.
  • the installation of the precast material 7 is not an indispensable process, and may be performed after the completion of the steel frame 4 to be described later.
  • the inner diameter of the precast material 7 is 3.1 meters, and the thickness is 0.1 meters.
  • the form member 1 is manufactured in advance in a factory, and is formed by joining curved plates to form an integral annular body. Its cross section is circular, 4.5 meters in diameter, 2.5 meters in height and 5 cm in thickness.
  • the form member 1 is a cement-based mortar having a water-cement ratio of 20% to 60%, and as shown in FIG. % It is mixed.
  • the mold member 1 is provided with vertical copper bars 35 for suspension at predetermined intervals on the inner peripheral surface thereof.
  • a hole 36 is provided at the tip of the flat steel 35, a hook is passed through the hole 36, and the hook is suspended by a crane (not shown). W 1 wornIt is possible to sequentially stack them on the foundation 2. By stacking a plurality of form members 1, a concrete form A having a desired height can be obtained.
  • the reinforcing bars inside the formwork member 1 are set up.
  • Reinforcing bars are arranged as follows. As shown in FIG. 4, mounting strip reinforcing bars 5a made of an L-shaped steel material are attached to the inner surface of the mold member 1 at intervals of 1.2 meters.
  • the belt reinforcing bar fixing device 5 a is fixed on a ring-shaped horizontal flat steel 37 provided at regular intervals in the inner circumferential direction of the form member 1.
  • assembled reinforcing bars 6 are attached to the belt reinforcing bar fixture 5a at predetermined intervals in the height direction.
  • the strip reinforcing bar 3 is attached horizontally so as to be orthogonal to the assembled reinforcing bar 6, and the reinforcing bars are arranged in a lattice shape.
  • the reinforcing bars 3 are provided at intervals of about 15 cm.
  • a steel frame 4 is erected around the precast material 7.
  • a structure (not shown) equal to or more than the steel frame 4 is embedded in the base 2 as an anchor in advance, and the steel frame 4 is connected to this structure by bolting.
  • the steel frame 4 is made of H copper (H-318 x 3 13 x 15 x 24), and its flange surface has a height of 2.1 mm and a pitch of 20 mm in the direction perpendicular to the longitudinal direction. Protrusions are formed on the surface to provide projections. Then, as shown in FIG.
  • the steel frame 4 is erected at a position where it does not come into contact with any of the band reinforcing bar 3 and the precast material 7.
  • the process of erecting the steel frame 4 does not matter before or after the process of stacking the formwork member 1 or the process of setting the precast material 7 and before and after the process.
  • the pier When the above construction is completed, the pier will be in a semi-finished state as shown in Figure 2. In this step, the required number of form members 1 and steel frames 4 are connected to each other to obtain a desired height. Then, a concrete is cast between the precast material 7 and the stacked formwork members 1. When the concrete hardens, the concrete pier is completed without removing the precast formwork 9.
  • the concrete pier A constructed in this way uses the precast formwork 9 and also has a projection on the steel frame, so that the crack width is about the same as or less than that of the reinforced concrete structure. As a result, the amount of deformation of the pier was reduced. It is also expected to have excellent earthquake resistance. (Example 2)
  • FIG. 6 is a flowchart showing a method of constructing a concrete pier. First, the construction order will be described based on this flowchart.
  • a required number of frame-shaped form members 10 are formed in an assembly yard or a manufacturing factory (step 1).
  • the belt reinforcing bar 11 is attached to these form members 10 via the reinforcing bar frame 14 shown in FIG. 7 (step 2).
  • a steel frame 12 such as an H-beam is erected at the concrete pier 1 construction site (step 3).
  • a precast form member 10 is set around the steel frame 12 (step 4).
  • a support (not shown) is assembled (step 5).
  • the precast form members 10 are sequentially stacked to a predetermined height.
  • step 3 of setting up the steel frame 12 and the concrete placing of step 6 are repeated a predetermined number of times n. By doing so, concrete pier 1 is completed (step 7).
  • the steel frame 12 is made into one step, a predetermined number of form members 10 are stacked around the steel frame 12, and then concrete 13 is poured into the concrete pier. Can be completed. This is the case where n is 1 as described above.
  • Figure 7 shows a cross section of a concrete pier B constructed by applying the above construction method.
  • the form member 10 of the concrete pier B is a frame-shaped, in this embodiment, a quadrilateral precast outer frame member 10a, and a precast frame member 1 arranged on one side of the precast outer frame member 10a.
  • a predetermined number of H-shaped steel frames 12 are arranged between the precast outer frame member 10a and the precast frame member 10b.
  • the outer cast frame member 10a and the precast frame member 10b serve as the outer walls of the concrete pier B, and are formed in a rectangular shape by concrete or mortar.
  • the precast outer frame member 10a and the precast frame member 10b are divided into a plurality of pieces in advance in an assembly card manufacturing plant or the like as described above, and these divided pieces are connected to form an integrated body. It can be formed as a frame.
  • the cross-sectional shape is a quadrangle in the present embodiment, but may be any shape such as a circle, an ellipse, and a polygon.
  • a plurality of reinforcing steel frames 14 are provided at appropriate intervals on the outer peripheral side of the precast inner frame member 10b, and the belt reinforcing steel 11 is attached to these reinforcing steel frames 14. I have.
  • the structure and mounting method of the reinforcing bar frame 14 and the belt reinforcing bar 11 will be described later.
  • Fig. 8 to Fig. 17 show the construction procedure of the concrete pier B mentioned above. It is assumed that the mold member 10 is manufactured in advance.
  • the anchoring portion of steel frame 12 such as H-shaped copper is erected on the foundation step 21 of concrete pier B.
  • a concrete for forming the fitting 22 is cast.
  • a predetermined number, in this embodiment, two, of the precast outer frame members 10a are stacked and installed on the fitting 22.
  • Fig. 11 if concrete 13 is poured into the stacked precast outer frame members 10a, 10a, the solid part which becomes the foundation of the concrete pier B is completed.
  • a steel frame 12 is further added to the steel frame 12 and connected by a connecting means such as a bolt.
  • a connecting means such as a bolt.
  • a predetermined number of precast outer frame members 10a are additionally placed on the precast outer frame members 10a already installed as shown in FIG. 13, and then, as shown in FIG.
  • a precast inner frame member 10b is stacked inside by a certain number and placed inside 12.
  • a strip reinforcing bar 11 is attached to the precast frame member 10b as described later.
  • the precast outer frame member 10a and the precast inner frame member 10b are connected by, for example, a bar-shaped connecting member 24.
  • the connecting member 24 can be made of a steel material such as an equilateral mountain steel or a groove steel other than the rod-shaped member.
  • FIG. 18 to FIG. 22 show a procedure for attaching the above-described reinforcing bar frame 14 and reinforcing bar 11 to the precast inner frame member 10b.
  • the reinforcing bar frame 14 is a quadrangle and is vertically divided into two.
  • one inner frame 14a of the reinforcing bar frame 14 is fixed to the outer peripheral surface of the precast inner frame member 10b by an appropriate method.
  • the inner frame 14a has a U-shape, and mesh streaks 25 are provided on the vertical sides.
  • the mesh bars 25 are attached to maintain the pitch of the band reinforcing bars 11 accurately and to facilitate the assembly of the band reinforcing bars 11.
  • a plurality of belt reinforcing bars 11 are attached to the mesh bars 25.
  • the other outer frame 14b is attached to the inner frame 14a as shown in FIG.
  • the outer frame 14 b is also provided with a mesh streak 26.
  • the strip reinforcing bar 11 is attached to the mesh bar 26 of the outer frame 14 b, and as shown in Fig. 22, the strip reinforcing bar 11 of the upper frame 14 a is The intermediate reinforcing bar 27 is connected to the belt reinforcing bar 11 of the outer frame 14 b. This completes the installation of the reinforcing bar frame 14, the belt reinforcing bar 11 and the intermediate reinforcing bar 27.
  • the method for constructing a concrete pier according to the present invention is as follows. Since the reinforcing bar 11 is previously attached to the inner frame member 10b, which is the form member 10, via the reinforcing bar frame 14 and then piled up. Installation of 1 becomes easy. In addition, since it is not necessary to assemble the rebar 11 and disassemble the formwork at the site, it is possible to reduce the number of work steps and the time required for delivery. In addition, rebar assembly work at high places is omitted, and work safety is improved.
  • a reinforcing bar frame 14 is provided on the precast inner frame member 10b, and the reinforcing bar 11 is mounted on the inner frame 14a of the reinforcing bar frame 14, so that the mounting of the reinforcing bar 11 is easy.
  • the reinforcing bar frame 14 and the band reinforcing bar 11 are attached to the precast frame member 10b in the present embodiment, they can be attached to the precast outer frame member 10a. Further, the step of installing the form member 10 and the step of erection of the steel frame 12 can be replaced with each other as appropriate.
  • FIG. 23 is a flowchart showing a method of constructing a concrete leg according to the third embodiment. First, an outline of the construction will be described based on this flowchart and FIG.
  • the pier construction site is excavated, a plurality of steel frames 12 such as H-beams are erected, and concrete is cast to form the foundation of pier C.
  • the assembling of the formwork member 10 is performed in parallel with the work of the footing 22, which is performed in a factory or a yard near the construction site.
  • Predetermined reinforcing bars and copper materials are arranged inside the formwork member 10 to manufacture the required number of pieces for construction.
  • formwork members 10 are sequentially stacked from below along steel frames 12. After forming the precast form 9 by fastening the form members 10 together with bolts or the like, concrete is poured into the precast form 9 through a concrete pumping pipe P from a pump truck. This work is required n times! : Repeat and build the pier C to the specified height to complete the construction.
  • Fig. 24 (a) As shown in Fig. 24 (a), at the construction site of concrete pier C, ground G is excavated to a predetermined depth. 10 H-beams 12 are erected on the excavated surface and inside the formwork members. A reinforcing bar (not shown) is arranged around the H-shaped steel 12 and a concrete formwork is assembled and arranged around the H-shaped copper 12 and the reinforcing bar. Pour concrete. For the steel frame 12, an H-section steel with a protrusion formed on the flange is used.
  • the form member 10 is a rectangular frame having a short side to long side ratio of about 1: 2, and is formed with a predetermined height.
  • a belt reinforcing bar 11 is attached to these precast form members 10 via a reinforcing steel assembly 40 (step 2).
  • the steel rebar assembly steel material 40 is a channel steel or an angle steel that is disposed at a predetermined interval on the inner peripheral surface of the frame-shaped form member 10.
  • the rebar-assembled steel materials 40 are provided at eight locations at predetermined intervals in the vertical direction with respect to the form member 10.
  • the frame-shaped reinforcing bar 11 is fixed to the reinforcing steel assembly 40 by welding or the like, and crosses the reinforcing bar 11 and intersects with the reinforcing bar 11 in a grid pattern. Distribute.
  • the strip reinforcing bar 11 and the intermediate reinforcing bar 27 may be assembled as a single unit, or those previously assembled in a rice cake net shape may be fixed to the reinforcing bar assembled steel material 40.
  • the frame-shaped portion forming the form member 10 is assembled by joining the U-shaped body 43 at the end and the linear body 44 connecting the two U-shaped bodies. To join them, a joint steel member 42 is provided in contact with the reinforcing steel member 40, and the reinforcing steel member 40 and the joint steel member 42 are fastened to each other by bolts.
  • one shape-retaining steel material 41 which is a channel steel or an angle iron, is arranged in the longitudinal direction of the formwork member, and three in the lateral direction. These are arranged so as to be alternately stacked with the above-mentioned belt reinforcing bars 11 and intermediate reinforcing bars 27 as shown in FIG. 26 (d).
  • the strip reinforcing bar 11 and the like and the shape-retaining steel material 40 are arranged at positions where they do not come into contact with the H-shaped steel when the form members 10 are stacked.
  • the shape-retaining steel material 41 is arranged in the transverse direction of the form member 10 to prevent both deformation of the form member 10 at the time of lifting and deformation due to lateral pressure at the time of placing concrete, and the latter is generally used in concrete. It will perform the same function as the separator used for a single formwork.
  • the precast form members 10 are sequentially stacked around the steel frame 12 to a predetermined height, and the stacked precast Pour concrete 13 into form member 10.
  • the scaffold 14 is installed on the uppermost formwork member, and the above-mentioned work (for the formwork member 10 ).
  • the concrete pier C is completed by repeating the installation and concrete casting) a predetermined number of times n.
  • the concrete pier C is completed by stacking all the form members 10 around the steel frame 12 and then placing the concrete 13 thereon.
  • the cross-sectional shape of the form member 10 is substantially quadrangular in this embodiment, but may be any shape such as a circle, an ellipse, or a polygon according to the cross-sectional shape of the pier.
  • each of the specimens is a concrete beam with a length (L) of 4.6 m, width (W) of 0.5 m, and height (H) of 0.8 meter. 120.
  • Specimen 1 has a conventional reinforced concrete structure (R C).
  • a belt reinforcing bar 110 is provided around the main reinforcing bar 100.
  • Specimen 2 has a steel frame concrete structure (S C), and is provided with four H-section steels 130 as shown in FIG.
  • the specimen 3 has a steel frame precast concrete structure (SC + PCa) of the present invention, and has a precast formwork 120a on a side surface and four insides. H steel 130 is provided.
  • Figure 32 through Figure 34 show the state of occurrence of cracks in specimens 1 through 3.
  • the solid line shows the cracks when the tension-side reinforcement reaches the allowable stress
  • the dotted line shows the cracks when the tension-side reinforcement gives the allowable stress to the yield stress.
  • the steel frame precast concrete structure of the present invention has almost the same dispersibility of cracks as the reinforced concrete structure.Also, the structure of the present invention has little difference in allowable stress but cracks in yield stress compared to other structures. I understood that there were few.
  • Figure 35 shows the relationship between the load on specimens 1 to 3 and the maximum crack width.
  • Specimen 3 has a smaller crack width than Specimen 1, and the steel frame precast concrete structure of the present invention has an effect of suppressing cracking.
  • the toughness of the steel frame precast concrete structure of the present invention exceeds that of the steel bar or the steel frame concrete structure.
  • Specimen 4 is a reinforced concrete structure as shown in Figure 37.
  • the main reinforcement 220 and the belt reinforcement 240 are arranged inside this, and the center is hollow.
  • Specimen 5 is a steel frame precast concrete structure of the present invention as shown in FIG.
  • H-shaped copper 230 and its surrounding rebar 250 are provided, and the center is hollow.
  • Each of the specimens 4 and 5 was a cylindrical column having a diameter (D) of 0.9 m, an inner diameter (I) of 0.3 m, and a height (T) of 2.6 m. These were mounted on a 0.75 meter high base 200 as shown in FIG.
  • An axial force loading jack 300 was installed on the upper surface of the test piece, a PC steel rod 310 was hung from this jack 300, and the lower end was embedded and fixed in the base 200. Connected to the NC 320. Also, an actuator 350 was installed between the stub 330 at the upper end and the reaction wall 340, and one end thereof was fixed to the stub 330.
  • FIG. 40 shows the horizontal displacement of the loading point of the specimen 4 and FIG. 41 shows that of the specimen 5 which is the structure of the present invention.
  • the vertical line shows the load (t f)
  • the horizontal line shows the horizontal displacement at the load point in millimeters
  • the dotted line shows the calculated ultimate strength.
  • Fig. 42 shows the relationship between the load and the displacement (envelope) of the test specimens 4 and 5
  • the vertical axis represents the load (tf)
  • the horizontal axis represents the horizontal displacement at the load point.
  • the structure of the present invention has the deformation performance not inferior to the conventional reinforced concrete structure, and has toughness higher than that of the conventional reinforced concrete.
  • the present invention is used in the construction of a concrete structure, and is particularly useful for the construction of a concrete structure such as a pier which requires work at height.

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Abstract

La présente invention concerne une structure de béton capable de réduire le terme de construction en omettant les opérations de fabrication de l'armature et d'enlèvement de forme dans le travail de construction, et de garantir la sécurité du travail; et un procédé de construction du même. Le procédé comprend la formation d'une base en construisant des châssis d'acier d'une hauteur déterminer, la formation de membres de forme du type du châssis dans lesquels les armatures sont agencées via des membres de fixation d'armature, l'empilement d'une pluralité de membres de forme de façon à y enfermer les châssis d'acier, la mise en place de béton dans une forme pré-coulés formée des membres de forme en pile, et unifier dans un corps les châssis d'acier, les frettes et la forme pré-coulée par prise du béton.
PCT/JP1999/004954 1999-09-10 1999-09-10 Structure de beton et procede de construction WO2001020089A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6852746B2 (en) 2001-12-06 2005-02-08 Pfizer Inc Crystalline drug form
CN102011508A (zh) * 2010-08-19 2011-04-13 常熟风范电力设备股份有限公司 一种高强度水泥杆
CN102031890A (zh) * 2010-08-19 2011-04-27 常熟风范电力设备股份有限公司 一种高强度树脂复合杆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0978763A (ja) * 1995-09-18 1997-03-25 Maeda Corp コンクリート構造物の施工方法及びプレキャスト型枠
JPH0978762A (ja) * 1995-09-18 1997-03-25 Maeda Corp 鉄骨コンクリート構造物
JPH0978532A (ja) * 1995-09-18 1997-03-25 Maeda Corp コンクリート橋脚の施工方法
JPH11241311A (ja) * 1998-02-23 1999-09-07 Maeda Corp コンクリート橋脚の施工方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0978763A (ja) * 1995-09-18 1997-03-25 Maeda Corp コンクリート構造物の施工方法及びプレキャスト型枠
JPH0978762A (ja) * 1995-09-18 1997-03-25 Maeda Corp 鉄骨コンクリート構造物
JPH0978532A (ja) * 1995-09-18 1997-03-25 Maeda Corp コンクリート橋脚の施工方法
JPH11241311A (ja) * 1998-02-23 1999-09-07 Maeda Corp コンクリート橋脚の施工方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6852746B2 (en) 2001-12-06 2005-02-08 Pfizer Inc Crystalline drug form
CN102011508A (zh) * 2010-08-19 2011-04-13 常熟风范电力设备股份有限公司 一种高强度水泥杆
CN102031890A (zh) * 2010-08-19 2011-04-27 常熟风范电力设备股份有限公司 一种高强度树脂复合杆

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