1. A U-shaped prestressed plate with two ribs and tension bars on its upper and lower parts is composed of a long-span U-shaped prestressed plate, the tension bars on its upper part, and the tension bars on its lower parts.

2. The double-ribbed n-shaped prestressed plate with upper and lower tension bars according to claim 1, wherein: the upper part of the rib is provided with a tension steel bar, the upper part of the plate between the upper parts of the two ribs can be provided with a tension steel bar, and the upper parts of the rib and the plate can be provided with tension steel bars.

3. The double-ribbed n-shaped prestressed plate with upper and lower tension bars according to claim 1, wherein: the lower tension bar may be connected to the plate rib lower embedded member.

4. The double-ribbed n-shaped prestressed plate with upper and lower tension bars according to claim 1, wherein: the plate width is substantially the same as the cross-sectional width of the column to which the plate is attached.

5. The board of claim 4 has a width substantially the same as the width of the cross section of the column to which the board is attached, and means that the board has a width the same as or slightly smaller than the width of the cross section of the column to which the board is attached, and works by welding a board seam or the like.

6. The double-ribbed n-shaped prestressed plate with upper and lower tension bars according to claim 1, wherein: if the section width of the column connected with the frame column is larger, a flange can be added on one side or two sides of the prestressed inverted U-shaped plate.

7. The utility model provides a prestressing force inverted U-shaped plate frame structure system of upper and lower part area tension reinforcing bar of double rib, includes prestressing force inverted U-shaped plate, frame post, bracket roof beam, the ordinary prestressing force roof beam board of upper and lower part area tension reinforcing bar on the double rib, and the frame longeron between the frame post can be the roof beam of falling T or L roof beam, its characterized in that: arranging a prestressed inverted U-shaped plate with tension steel bars at the upper and lower parts of the double ribs on a bracket beam on a frame column, and connecting the tension steel bars at the upper part with the frame column steel bars; the lower part steel bars of the ribs are connected with the upper steel bars of the bracket beams, and the lower part tension steel bars of the ribs can be connected with the embedded parts and the upper steel bars of the bracket beams or welded with the embedded parts of the bracket beams; other long-span prestressed beam slabs are arranged on two opposite frame longitudinal beams, usually an inverted T beam or an L beam, to form a frame structure system.

8. The n-shaped plate frame structure system of claim 7, wherein the n-shaped plate frame structure system is composed of embedded members, upper tension bars, and lower tension bars, and the embedded members are connected to the upper tension bars and bent to the back of the rib.

9. The method of claim 8, wherein the plate is provided with a rib at a back portion of the rib.

10. The other long span prestressed girder slabs set forth in claim 7, comprising prestressed & -shaped slabs, double T slabs, single T slabs, rectangular girders, hollow slabs, bridge slabs.

Background art: the large-span prestressed plate is used for a frame structure, a feasible structure system does not exist, the structure of an upper structure embedded end, which is connected with an underground garage and a main building, of a multi-storey building and an underground garage requires the frame structure, a hinged bent frame structure is not allowed to be used, and the situation that a cast-in-place structure beam is too large cannot be realized; the virtual frame is also very large in manufacturing cost, the transverse ribs are large and dense, the template hanging cannot be realized in reality, the cost of the template supporting is not saved, the template supporting is difficult to realize, and most designers cannot recognize the template. The single rib of the combined frame structure is too small to complete two tasks, namely a plate with a large coverage area and a frame beam; the two ribs are combined to form a cross beam, a bracket on a column and a bracket beam on a supporting beam between the columns are not on the same horizontal line, one rib of one page plate and one rib of the other page plate are combined to be arranged on the bracket beam, the other rib is arranged on the bracket of the supporting beam and must form two ribs with different lengths, the large-span and large-load carrier plate is difficult to crack during production, a frame longitudinal beam between the columns is the most reasonable as the supporting beam, and if the reinforced concrete huge supporting beam is manufactured on the bracket, the waste is huge, and the processing is needed between the supporting beam and the longitudinal beam, so the processing cannot be realized.

The invention content is as follows: the invention provides a double-rib prestressed inverted U-shaped plate with upper and lower parts provided with tension steel bars and a structural system, which are very simple, feasible and reasonable and solve the problems;

a U-shaped prestressed plate with two ribs and tension bars on its upper and lower parts is composed of a long-span U-shaped prestressed plate, the tension bars on its upper part, and the tension bars on its lower parts.

Furthermore, the upper part of the rib can be provided with a tension steel bar, the upper part of the plate between the upper parts of the two ribs can be provided with a tension steel bar, and the upper parts of the rib and the upper part of the plate can be provided with tension steel bars.

Further, the lower tension bar may be connected with the plate rib lower embedded member.

Further, the plate width is substantially the same as the width of the cross-section of the column to which the plate is attached.

Further, the plate width is substantially the same as the cross-sectional width of the column connected with the plate, which means that the plate width is the same as or slightly smaller than the cross-sectional width of the column connected with the plate, and the plate is welded to the plate seam.

Further, if the section width of the post connected to the frame post is large, a flange may be added to one side or both sides of the pre-stressed inverted-U-shaped plate.

Further, the U-shaped prestressed plate frame structure system with the tension steel bars on the upper and lower portions of the double ribs comprises the U-shaped prestressed plate with the tension steel bars on the upper and lower portions of the double ribs, frame columns, bracket beams on the frame columns and common prestressed beam plates, wherein frame longitudinal beams between the frame columns can be inverted T beams or L beams, and are characterized in that: arranging a prestressed inverted U-shaped plate with tension steel bars at the upper and lower parts of the double ribs on a bracket beam on a frame column, and connecting the tension steel bars at the upper part with the frame column steel bars; the lower part steel bars of the ribs are connected with the upper steel bars of the bracket beams, and the lower part tension steel bars of the ribs can be connected with the embedded parts and the upper steel bars of the bracket beams or welded with the embedded parts of the bracket beams; the other large-span prestressed beam plates are arranged on two opposite frame longitudinal beams, usually an inverted T beam or an L beam, so that the maximum bending moment in the span is completed by prestressed reinforcements, the shearing force provided by the connection of the lower embedded part is less than or equal to the pulling force formed by the connection of the upper tensioned reinforcements and the column reinforcements, and the beam bending moment is formed according to the height of the plates, so that the prestressed plates are restrained from rotating up and down under the action of seismic force and horizontal force, and are combined to form a frame structure system, but the system is characterized in that: 1. the system is formed by connecting all upper and lower tension steel bars of double ribs or steel bars including the middle position of the upper parts of the two ribs with column beam steel bars together, and compared with the system formed by connecting the upper and lower steel bars with the column beam steel bars after one rib is combined up and down or the two ribs are combined, the system is more reasonable in stress and more complete, the structure of a building is simpler and easier to realize, and the construction period and the construction cost are saved. In reality, one rib is usually insufficient, and the combined stress of 2 ribs is inconsistent; the invention also needs to deal with the problems of plate joints and the like, such as crack pouring, mesh adding in the middle and other measures, the invention is characterized in that two ribs of the same plate are connected with the column-beam steel bars together, the connection with the beam column is changed from one line connection into a connection surface, the same plate does not have the problems of stress inconsistency and two plate joint treatment, and the effect after the connection is greatly improved even if the same steel bars are connected; 2. the prestressed inverted U-shaped plates are basically as wide as the columns, the problem of frame beams is solved independently, combination with other plates and supporting beams of the plates is simpler, and stress is clearer; the bracket beam on the longitudinal beam between the frame columns and the prestressed plates on the bracket beam and the bracket beam on the columns and the prestressed plates on the bracket beam are respectively conveniently and independently designed, the complex waste of a building structure caused by the coordination stress between the bracket beam and the prestressed plates does not need to be on the same horizontal line, and even the complex and waste which are required to be processed in production, design and use and are caused by the fact that two ribs of the same sheet plate are different in length and stress are different are avoided.

Furthermore, the embedded part is connected with the upper tension steel bar and bent to the plate surface, the upper tension steel bar of the rib is connected with the embedded part and bent to the back of the rib, and the steel bars on the frame columns are respectively connected with the embedded parts on the corresponding plate surface, so that the necessary steel bar lap joint length requirement specified by the specification and the simple and feasible construction are ensured.

Furthermore, the embedded part is connected with the tension steel bar and bent to the plate surface, and the plate surface is characterized in that the back part of the rib is provided with a dowel.

And the other long-span prestressed beam plates further arranged on the two opposite frame longitudinal beams comprise prestressed inverted U-shaped plates, double T plates, single T plates, rectangular beams, hollow plates and bridge plates.

Description of the drawings and detailed description;

FIG. 1 is a schematic view of a double-ribbed pre-stressed inverted U-shaped plate structure with upper and lower tension bars; wherein, 1 is a double-rib prestressed reverse U-shaped plate with tension steel bars at the upper and lower parts; 2 is a tension steel bar on the upper part of the prestressed reverse U-shaped plate rib; 3 is a pre-embedded part at the lower part of the prestressed reverse U-shaped plate rib; 4 is a tension steel bar at the lower part of the prestressed inverted U-shaped plate; FIG. 1-1 is a pre-stressed inverted U-shaped plate with reinforcing bars under tension at the upper part of ribs; FIGS. 1-2 are pre-stressed inverted U-shaped plates with reinforcing bars under tension at the upper portions of ribs and plates;

FIG. 2 is a schematic view of a double-ribbed inverted U-shaped plate frame structure system with upper and lower tension bars; 5 is a frame column; 6 is a bracket beam on the frame column; 7 is a lower beam of a frame longitudinal beam inverted T beam between the frame columns; 8 is a frame longitudinal beam between the frame columns and a high beam of an inverted T beam; and 9, common prestressed beam plates including prestressed n-shaped plates, double T plates, single T plates, rectangular beams, hollow plates and bridge plates.

The specific implementation mode is as follows: as shown in fig. 1 and fig. 2, a frame column 5 is constructed by a conventional method, and a bracket beam 6 is arranged on the frame column; and frame longitudinal beams 7 and 8 between the frame columns are inverted T-shaped beams.