KR970059431A - Prestressed Continuous Composite Structure Construction and Construction Method - Google Patents

Abstract

The present invention can overcome the structural and functional defects due to the expansion joints by eliminating the expansion joint which is inevitably installed in the construction and continuously tremendously by the single span prestressed composite structure constructed so far, The present invention also relates to a new method of producing a prestressed composite beam and a method of constructing a prestressed composite beam structure capable of drastically reducing material. Further, in order to improve the difficulty of conveying and handling occurring when the length of the prestressed composite beam is changed, the composite beams can be dividedly manufactured, and the divided segments can be assembled, And a prestressed composite beam for inter-sideways interconnection is continuously integrated on a point. In order to achieve this purpose, a prestressing method corresponding to the tensile stress generated in the upper flange due to the inner branch buoyant moment caused by dead load and live load in the continuous beam structure should be adopted. The construction method of the continuous invented composite prestressed composite structure is to integrate without any complicated processes such as rising and falling of points and problems of fixed end processing in the manufacturing process. However, a key technique for achieving the object of the present invention is to solve the problem caused by the installation of the fixed end in the manufacturing process and to integrate the connection part between the continuous gait prestressing composite bones separated and produced in a short span without any complicated process of ascending and descending of the fulcrum It is in Sikkim. Accordingly, it is possible to completely eliminate the problems of the expansion joint generated in the existing prestressed composite building structure, and to provide a construction method which is high in fatigue breaking strength, high vibration resistance, and deflection. It is a further object of the present invention to provide a method and apparatus for continuously reducing the maximum bending moment in the span due to its own weight and live load by significantly reducing the pre- And to provide a new prestressed continuous composite structure having an economic and safe cross section by introducing a split manufacturing method which is advantageous for handling. The fabrication and construction of the prestressed continuous composite beam structure at the point elevation manufacturing stage and the fixed stage installation according to the present invention can be further divided into three different functions and construction characteristics in different ways, After constructing and installing the restrained composite beams, the slab and the abdomen of the section of the upper section of the section are put into the concrete as a whole, and the upper section of the section of the upper section is treated with the pre-casting with the compressive stress. The construction method is performed by pre-casting with partially stressed concrete or with factory-produced pre-casting, and pre-stressed prestressed tops of the parent section. And thirdly, it provides a method to complete the high-quality structure in a short period of time by factory-making the whole roof and assembling it easily in the field.

Description

Prestressed Continuous Composite Structure Construction and Construction Method

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a view showing a shape of a prestressed continuous composite beam structure according to the present invention, a shape of a prestressed composite beam having different characteristics of the outer span steel beam,

FIG. 2 is a principle view of a prestressing process for a longitudinal section in the outer span section of the continuous prestressed composite beam structure according to the present invention; FIG.

FIG. 3 is a principle diagram of a process for introducing a compressive stress to a section of the moment in the outer span of the prestress continuous composite beam structure according to the present invention;

FIG. 4 is a view showing the shape of a steel beam for internal side sill according to the present invention and a prestressed composite beam having different functions and construction characteristics,

FIG. 5 is a principle diagram for a prestressing process of the compression stress in the inner and outer diametric sections of the prestress continuous composite structure according to the present invention; FIG.

FIG. 6 is a principle diagram for a prestressing process of a compression stress in a section of the inner diameter of a continuous prestressed composite beam structure according to the present invention; FIG.

7 is a perspective view of a prestressed continuous composite beam structure according to the present invention. FIG. 7 is a perspective view of a prestressed continuous prestressed concrete structure according to the present invention. The combined assembly of the left and right sidewall prestressed composite beams,

FIG. 8 is a top view of a continuous prestressed composite beam structure according to the present invention; FIG. In addition, the upper plate of the momentum section is connected and assembled between the outer-span prestress composite beam and the inner-span inter-prestricted composite beam in the case of completing the pre-

FIG. 9 is a perspective view of a connection assembly of an outer sheath prestressing composite beam and a inner sheath prestressing composite beam in a case where a precast upper plate is fully assembled and completed in a continuous prestressed composite beam structure according to the present invention.

Claims (9)

When the continuous composite beam structure is completed in the production and construction of the continuous prestressed composite structure, the deflection curve due to the external force is roughly inverted and the outer span steel with the vertex at about 1 / (1), (4) and (4) and (5) and (5) with the point where the moment is "0" in the roughness under the dead load when the structure is completed, (2) and (5). In order to compensate the tensile stress generated in the completion of the continuous structure after the split fabrication, two concentrators can be installed in a simple beam system to introduce the compressive stress necessary for the lower flange of the beam The concrete is placed and cured in the lower flange with the load P applied (Fig. 2, Fig. 5). In particular, in the case of the parent moments section, (2), (5) are connected to the right and left sides of the third member (3), and a load P capable of introducing a necessary compressive stress after a point is established at both ends of the third member is added to the beginning and end of the momentum section member (Fig. 3, Fig. 6), and then the concrete is placed in the upper flange. (9), and (9), where the compressive stress is introduced in the upper part of the upper section, and the lower part of the upper section, The top plate of the section is integrally joined by the pre-cast concrete or the pre-fabricated precast, and the upper part of the joint 8 between the outer-span prestress composite and the inner-span inter-prest constriction is completed by filling the expanded concrete (See Figs. 7, 8, and 9) of a continuous prestressed composite structure having the characteristics shown in Fig. In order to compensate the tensile stress due to the momentum, the continuous beam structure is subjected to a compressive stress (Prestressing) between the joints (8) of the beam by the concentrated reinforcement of the tensile steel reinforcement Wherein the prestressed continuous composite beam structure has a plurality of prestressed continuous composite beams. When the continuous composite structure is completed at the outer span of the prestressed continuous composite beam structure according to claim 1, the deflection curve due to the external force is schematically inverted, and the outer side of the state having the vertex at about 1 / Prestressed composite beams are produced by separating the prestressed composite beams into a section with a maximum moment (~ 0.751) (1) and a section with a maximum moment (~ 0.251) (2). When the continuous composite structure is completed between the inner diameters of the prestress continuous composite beam structure, the deflection curve due to the external force is substantially inverted, and the inner sagittal prestress composite beam in the state having the vertex at the center of the beam, And a segment (~ 0.21) (5) of the parent segment (4) and a segment of the parent segment (5). The method according to claim 1, wherein, when the continuous prestressed composite structure is completed, the outer prestressed composite beam and the inner prestressed composite beam segment, in which the deflection curve due to external force is roughly inverted, In order to compensate, the concrete is placed and cured in the lower flange with two concentrated loads P applied to the upper part of the beam by the simple beam system (Fig. 2, Fig. 5) A method of manufacturing a composite prestressed prestressing device for prestressing a concrete placed in a lower flange. (2), (5) of the momentum section are connected to the right and left of the third member (3) in the outer prestressed composite beam and the inner prestressed composite beam of the continuous composite beam structure of claim 1, (3) After installing a point on both ends of the member, the load P, which can introduce the necessary compressive stress at the beginning and end of the member, is applied to the upper flange. A method of manufacturing a prestressed composite beam having a characteristic of introducing a compressive stress capable of canceling a saddle stress caused by a stress. In the construction of the continuous prestressed composite building structure according to claim 1 and claim 2, the upper plate of the section of the grand moment is completed by the compression stress introduction method and the continuous composite structure is completed by using the pre-cast (9) Construction method of continuous prestressed composite beam structure. In the construction of the continuous prestressed composite building structure according to any one of claims 1 and 2, the top plate of the moment frame section is completed by partially casting the prefabricated continuous casting structure using prefabricated cast concrete or factory prefabricated concrete Construction method of prestress continuous composite beam structure. The continuous prestressed composite beam structure according to any one of claims 1 and 2, wherein a protrusion and a shear key are installed on the upper part of the prestressed composite beam to enable assembly and connection of the upper plate precast produced in the factory. . ※ Note: It is disclosed by the contents of the first application.