CN103711201A - Large-span prestressed concrete beam board frame structural system - Google Patents

Abstract

The upper part of the long-span concrete beam slab is connected with the column by adding bending reinforcement, so that the long-span slab rib acts as a frame beam to form a frame structure.

Description

A long-span prestressed concrete beam-slab frame structure system

1. Technical field: construction engineering field

2. Background technology

Large-span prestressed concrete beams and slabs are used in frame structures. At present, there is no matching structural system, so they cannot be used. The proposed frame beams are also expensive, especially because there are too many horizontal ribs, too long, and the cost is too high. And the high-altitude support formwork is cumbersome, and quite a few experts questioned that it is unreliable, and the fixed frame spacing of 5 meters, 7.5 meters, and 9.9 meters must be fixed for the 2.4-meter-wide plate-column net, which does not meet the process requirements of many factories.

3. Contents of the invention

The invention provides a large-span prestressed concrete beam-slab frame structure to solve the above disadvantages.

Large-span prestressed concrete beam-slab frame structure, including: frame columns, frame longitudinal beams or corbels on columns, long-span prestressed concrete beam-slabs, including double T-slabs, single T-slabs, channel-shaped slabs, swallow-shaped slabs, Rectangular beams, bridge slabs, multi-T box girders and hollow slabs are characterized in that: the ribs of the beams and slabs are placed on the corbels on the columns or on the longitudinal beams in front of the columns, and the upper part of the concrete beams and slabs, especially the upper part of the ribs, is increased Bending steel bars are connected with the steel bars on the columns. There are iron embedded parts at the bottom of both ends of the beam and slab ribs, which are welded with the steel or embedded parts on the frame longitudinal beams or frame column corbels, thus forming a large-span prestressed concrete beam-slab frame structure system .

Further place the ribs without flanges corresponding to the columns, and the upper bending steel bars and the columns

Connect the upper steel bar or connect the upper bending steel bar with the column steel bar after strengthening the ribs or combine two adjacent ribs together, or merge them together after strengthening, fill the middle joint, and place it correspondingly to the column, and the upper bending steel bar and the column Reinforcement connection; place the single rib of the double T plate with flange corresponding to the column, connect the bending reinforcement on the beam plate to the column reinforcement, or connect two adjacent ribs without the corresponding flange, and pour in the middle The upper part of the two plates, especially the upper part of the two ribs, is connected with the steel on the column, or the two ribs or one of the ribs are strengthened, and the joint is filled in the middle, and the upper parts of the two plates, especially the upper part of the two ribs, are connected together with the column Made of steel connections.

Further, the bending reinforcement in the large-span prestressed concrete beam slab is provided with inserting reinforcement in the lower concrete, and an anchor reinforcement is provided at the end.

Further, the amount of bending reinforcement on the large-span prestressed concrete beam slab is more at both ends and less at the middle.

Further, the double T-slab with bending steel bars on the upper part can remove one side flange, or the ribs can be moved to the side, and the width and effective area of the slab remain basically unchanged, forming an "F" slab.

Further use the shear force provided by the welding of the embedded parts under the beam slab rib and the embedded parts on the beam or on the corbel beam, which is less than or equal to the tension formed by the connection of the bending reinforcement on the beam slab and the reinforcement on the column, and form a restraint bending moment according to the height of the slab rib , thus forming a steel-jointed frame-beam structure.

Further, in the long-span prestressed concrete beam slab, the large-span prestressed concrete beam slab of the bending steel bar is provided with inserting bars up and down the concrete along the bending steel bar, and the anchor bars are set at the ends.

4. Description of drawings:

Figure 1-1 is a schematic diagram of the long-span prestressed beam-slab frame structure system, front and elevation

Figure 1-2 is a schematic side elevation view of the long-span prestressed beam-slab frame structure system

Figure 2-1 is the front elevation view of the schematic diagram of the prestressed channel plate frame structure system

Figure 2-2 is a schematic side elevation view of the prestressed channel plate frame structure system

1 is the frame column; 2 is the frame stringer. 3 is the double T-slab that removes the upper part of one flange and adds bending reinforcement; 4 is the bending reinforcement on the plate;

5. Specific implementation methods:

Taking the double T plate as an example, as shown in Figure 1: the frame column 1 and the corbel 2 on the column are built by the conventional method, and the two double T plates 3 with the corresponding flanges removed are arranged on the frame column 1 at both ends of the double T plate. On the corbel of the upper part of the plate, the bending steel bar 4 on the upper part of the plate is connected with the reinforcing bar on the column 1, and the angle steel can be set at the end of the double T plate 3, welded with the upper steel of the column 1, and the embedded part of the lower part of the plate is connected with the upper part of the corbel 2 The embedded parts are connected, and a secondary pouring layer is made on it. This scheme only adds bending steel bars and light-weight insertion bars, anchor bars, and end angle steels. The cost is very low, and the huge cost of the high-altitude formwork for the proposed frame beam and the thick, long, and dense horizontal Erecting steel bars, (the 4 ribs that pass through the double T plate are 2 x 2.4m wide double T plate - 2 that do not pass through x one side flange 0.5m = 3.8m long), as well as drawing review, design experts, mostly Those who do not accept that the proposed frame is not a frame beam but a disadvantage of a system to be further tested,

Take the grooved plate as an example: as shown in Figure 2:

1. Construct the frame column 1 and the corbel 2 on the column by conventional methods, and reserve embedded parts on the corbel 2

2. Place the channel-shaped plate 3 with the bending reinforcement 4 on the upper part corresponding to the column 1, connect the bending reinforcement 4 at both ends to the upper reinforcement of the column 1 at both ends, and connect the lower embedded part of the end of the channel-shaped plate 3 with the corbel 2 The embedded parts on it are connected.

Claims (6)

1. large-span prestressed concrete beam slab frame construction, comprise: bracket on frame column, frame rails or post, large-span prestressed concrete beam slab, comprise T plate, trough slab, it is characterized in that: beam slab rib correspondence is placed on post on bracket or on post front longitudinal, on concrete beam plate top, especially rib top increases bending steel muscle, be connected with reinforcing bar on post, bottom, rib two ends has iron embedded part to be connected with steel on frame rails or frame column bracket or embedded part, thereby forms a kind of large-span prestressed concrete beam slab frame structure system.

2. large-span prestressed concrete beam slab frame structure system as claimed in claim 1, it is characterized in that: the placement corresponding to post of the flute profile rib of slab without the edge of a wing, its top bending steel muscle is connected with reinforcing bar on post or rib is strengthened to upper back bending steel muscle and is connected with post reinforcing bar or 2 ribs that face are mutually combined, or combine after strengthening, the middle cementation of fissures, placement corresponding to post, top bending steel muscle is connected with post reinforcing bar; The single rib placement corresponding to post that has the T plate on the edge of a wing, on beam slab, bending steel muscle is connected with post reinforcing bar, also 2 ribs that remove the corresponding edge of a wing that face mutually can be combined, the middle cementation of fissures, placement corresponding to post, two plate tops especially both sides of the chest top bending steel muscle be connected with steel on post together or both sides of the chest or one of them rib are strengthened after in the middle of the cementation of fissures, two plate tops especially both sides of the chest top bending steel muscle together with post on steel be formed by connecting.

3. the large-span prestressed concrete beam slab frame structure system as described in claims 1,2, is characterized in that: in described large-span prestressed concrete beam slab, bending steel muscle is provided with joint bar in the concrete of bottom, and end is provided with dowel.

4. the large-span prestressed concrete beam slab frame structure system as described in claims 1 or 2, is characterized in that: on plate, bending steel muscle amount two ends are how middle few.

5. large-span prestressed concrete beam slab frame structure system as claimed in claim 2,

It is characterized in that: the T plate that described top is provided with bending steel muscle can remove a side wing edge, also can move limit portion by rib, plate is wide substantially constant, and effective area is substantially constant, forms " F " plate.

6. large-span prestressed concrete beam slab frame structure system as claimed in claim 1, it is characterized in that: utilize under beam slab rib on embedded part and beam or shearing that the slugging on bracket beam provides, be less than or equal to the pulling force that on beam slab, on bending steel muscle and post, reinforcing bar is connected to form, according to rib of slab height, form restraining moment, thereby form steel, connect frame girder construction.

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