CN104389347A - Hinging joint structure of large-span prestressed concrete framed girder - Google Patents

Abstract

A long-span prestressed concrete frame beam-hinge joint structure, which includes frame beams (1) and frame columns (2), and the frame beams (1) and frame columns (2) are connected together to form a prestressed concrete frame structure, and its characteristics In that: the inside and outside of the interface between the bottom surface of the frame beam (1) and the top surface of the frame column (2) are respectively provided with an inner isolation layer (3) and an outer isolation layer (4), and the frame beam (1) and the frame The columns (2) are connected by reinforced concrete core columns (5), and the frame beam (1) is provided with a reinforced concrete beam pad (6) on the side of the inner plate isolation layer (3). In the present invention, the side columns of the large-span prestressed concrete frame on the top floor are set as a single-item hinged structure to release the bending moment transmitted from the large-span prestressed concrete frame beam, so that the side frame columns are in a small eccentric compression state, reducing the amount of reinforcement and the size of the section , improve the mechanical performance of the frame structure, and meet the design requirements of the large space of the building.

Description

A long-span prestressed concrete frame beam-hinge joint structure

technical field

The invention belongs to the technical field of construction engineering, and in particular relates to a beam-hinge node structure of a prestressed concrete frame, which can improve the stress condition of a large-span prestressed concrete frame. the

Background technique

In architectural engineering technology, prestressed concrete frame structure is a commonly used structural type in order to obtain a larger usable space, but when the top floor of a building adopts a large-span prestressed concrete frame structure, the axial pressure on the side frame columns is relatively large. Small, but the bending moment is large, so it is necessary to configure a lot of stressed steel bars or use a large column section size. However, too much reinforcement in the frame column will lead to dense reinforcement, which will affect the quality of concrete pouring and increase the cost; increasing the cross-sectional size of the frame column will not only make the structural design unreasonable, but also increase the cost, which will also affect the aesthetics of the building and reduce the useable area of the building. Therefore, the design of the side columns of the top-floor long-span prestressed concrete frame structure is an urgent problem to be solved in current engineering. the

Contents of the invention

The purpose of the present invention is to provide a long-span prestressed concrete frame beam-hinge joint structure aiming at the technical defect of the large-span prestressed concrete frame column in the existing construction project that the force and bending moment are too large. The side columns of the frame are set in a single-item hinged structure to release the bending moment transmitted by the long-span prestressed concrete frame beams, so that the side frame columns are in a small eccentric compression state, reduce the amount of reinforcement and section size, and improve the mechanical performance of the frame structure. It meets the design requirements of the large space of the building. the

Technical solutions

In order to achieve the above technical purpose, the present invention designs a large-span prestressed concrete frame beam hinge joint structure, which includes frame beams and frame columns, and the frame beams and frame columns are connected together to form a prestressed concrete frame structure, which is characterized in that: The inside and outside of the interface between the bottom surface of the frame beam and the top surface of the frame column are respectively provided with an inner isolation layer and an outer isolation layer, and the frame beam and the frame column are connected by a reinforced concrete core column, and the reinforced concrete core column is located on the inner isolation Between the layer and the outer isolation layer, one end extends into the frame beam, and the other end extends into the frame column, and a reinforced concrete beam pad is provided in the frame beam on the side of the inner plate isolation layer. the

Further, the main reinforcement on the inner and outer sides of the frame column is bent and anchored at the height of the beam bottom. the

Further, the inner isolation layer and the outer isolation layer are both made of tetrafluoro board, the width of the tetrafluoro board is 1/4 of the height of the frame column, the length is the same as the width of the frame column, and the thickness is 5mm. the

Further, the width and height of the reinforced concrete core column are 1/2 of the width and height of the frame column, and the number of main reinforcements is not less than 4 The length of the main reinforcement extending into the frame beam and frame column shall not be less than 30 times the diameter of the main reinforcement, and the size of the stirrup shall not be less than The stirrup spacing is 100mm.

Further, the width of the reinforced concrete beam pad is 1/4 of the height of the frame column, the length is the same as the width of the frame column, and the specification of the main reinforcement is not less than The stirrup spacing is 200mm.

Beneficial effect

The present invention provides a beam-hinge joint structure of a long-span prestressed concrete frame. The side columns of a large-span prestressed concrete frame on the top floor are set as a single-item hinge structure to release the bending moment transmitted from the long-span prestressed concrete frame beam, so that the side frame columns are in the In the small eccentric compression state, the amount of reinforcement and section size are reduced, the mechanical performance of the frame structure is improved, and the design requirements of the large space of the building are met. the

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention. the

Accompanying drawing 2 is A sectional view in accompanying drawing 1. the

Accompanying drawing 3 is the B-direction sectional view in accompanying drawing 1. the

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. the

Example

As shown in Figures 1 to 3, a large-span prestressed concrete frame beam-hinge joint structure, which includes frame beams 1 and frame columns 2, frame beams 1 and frame columns 2 are connected together to form a prestressed concrete frame structure, wherein , the inside and outside of the interface between the bottom surface of the frame beam 1 and the top surface of the frame column 2 are respectively provided with an inner isolation layer 3 and an outer isolation layer 4, the inner isolation layer 3 and the outer isolation layer 4 are made of PTFE board, and the PTFE The width of the board is 1/4 of the height of the frame column, the length is the same as the width of the frame column, and the thickness is 5mm. The inner and outer main reinforcements of the frame column 2 are bent and anchored at the height of the beam bottom. The frame beam 1 and the frame column 2 are connected by a reinforced concrete core column 5, the reinforced concrete core column 5 is located between the inner isolation layer 3 and the outer isolation layer 4, one end extends into the frame beam 1, and the other end extends into the frame column 2. The width and height of the reinforced concrete core column 5 are 1/2 of the width and height of the frame column 2, and the number of main bars is not less than 4 The length of the main reinforcement extending into the frame beam 1 and frame column 2 shall not be less than 30 times the diameter of the main reinforcement, and the size of the stirrup shall not be less than The stirrup spacing is 100mm. In the frame beam 1, a reinforced concrete beam pad 6 is arranged on one side of the inner plate isolation layer 3. The width of the reinforced concrete beam pad 6 is 1/4 of the height of the frame column 2, and the length is the same as the width of the frame column 2. The main reinforcement specification not less than The stirrup spacing is 200mm.

In the present invention, the side columns of the large-span prestressed concrete frame on the top floor are set as a single-item hinged structure to release the bending moment transmitted from the large-span prestressed concrete frame beam, so that the side frame columns are in a small eccentric compression state, and the amount of reinforcement and the size of the section are reduced , improve the mechanical performance of the frame structure, and meet the design requirements of the large space of the building. the

The front, back, left, and right described in the present invention are relative positions, not absolute positions. The scope of protection of the present invention is not limited to the technical solutions mentioned in this embodiment. Any technical solutions inspired by the present invention should fall into the protection of the present invention scope. the

Claims (5)

1. A large-span prestressed concrete frame beam-hinge joint structure, which comprises frame beams (1) and frame columns (2), and frame beams (1) and frame columns (2) are connected together to form a prestressed concrete frame structure, It is characterized in that: the inside and outside of the interface between the bottom surface of the frame beam (1) and the top surface of the frame column (2) are respectively provided with an inner isolation layer (3) and an outer isolation layer (4), and the frame beam (1) It is connected with the frame column (2) through a reinforced concrete core column (5), the reinforced concrete core column (5) is located between the inner isolation layer (3) and the outer isolation layer (4), and one end extends into the frame beam (1) , the other end extends into the frame column (2), and a reinforced concrete beam pad (6) is provided on the side of the inner plate isolation layer (3) in the frame beam (1). 2. A long-span prestressed concrete frame beam-hinge joint structure according to claim 1, characterized in that: the main reinforcement on the inner and outer sides of the frame column (2) is bent and anchored at the elevation of the beam bottom. 3. A kind of long-span prestressed concrete frame beam-hinge joint structure as claimed in claim 1, characterized in that: the inner isolation layer (3) and the outer isolation layer (4) are all made of PTFE board, and the PTFE The width of the board is 1/4 of the height of the frame column, the length is the same as the width of the frame column, and the thickness is 5mm. 4. A long-span prestressed concrete frame beam-hinge joint structure as claimed in claim 1, characterized in that: the width and height of the reinforced concrete core column (5) are respectively 1% of the width and height of the frame column (2) /2, the number of main ribs is not less than 4 The length of the main reinforcement extending into the frame beam (1) and frame column (2) shall not be less than 30 times the diameter of the main reinforcement, and the size of the stirrup shall not be less than The stirrup spacing is 100mm. 5. A kind of large-span prestressed concrete frame beam-hinge joint structure as claimed in claim 1, characterized in that: the width of the reinforced concrete beam pad (6) is 1/4 of the height of the frame column (2), and the length is 1/4 of the height of the frame column (2). The width of the frame column (2) is the same, and the specification of the main reinforcement is not less than The stirrup spacing is 200mm.