CN210596979U

CN210596979U - Multilayer steel plate-concrete combined beam

Info

Publication number: CN210596979U
Application number: CN201921275097.1U
Authority: CN
Inventors: 徐向锋; 李忻忻; 张峰; 张东立
Original assignee: Shandong Jiaotong University
Current assignee: Shandong Jiaotong University
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-22
Anticipated expiration: 2029-08-08

Abstract

The multi-layer steel plate-concrete combined beam comprises a bottom steel plate, a middle steel plate, an upper steel plate, a lower concrete layer and an upper concrete layer, wherein studs embedded into the lower concrete layer and the upper concrete layer are uniformly fixed on the upper surfaces of the bottom steel plate and the middle steel plate respectively; the two ends of the composite beam are provided with beam head columns, and the middle part of the composite beam is uniformly provided with a plurality of middle connecting columns which penetrate through the lower concrete layer and the upper concrete layer to connect the bottom steel plate, the middle steel plate and the upper steel plate together. The utility model discloses a composite beam adopts multilayer steel sheet and multilayer concrete, utilizes the excellent compressive property of concrete and the good tensile effect of steel sheet for the composite beam who forms has bigger bearing capacity, and when the bridge atress, every layer of steel sheet in the bridge, the common atress in every layer of concrete layer bear the bending deformation that the load causes, have increased composite beam's span, and have prolonged composite beam's life.

Description

Multilayer steel plate-concrete combined beam

Technical Field

The present invention relates to a steel plate-concrete composite beam, and more particularly, to a multi-layered steel plate-concrete composite beam.

Background

Compared with reinforcing steel bars, the steel plates have larger cross-sectional areas and more excellent bending properties, and the composite beams formed by the steel plates and concrete are gradually widely applied to high-rise buildings and bridge construction. The concrete has stronger compression strength, when the tensile strength is lower, the steel plate has good tensile strength, after the steel plate and the concrete are combined to form the combined beam, the steel plate bears the tension part of the combined beam, and the concrete bears the pressure part of the combined beam, so that the combined beam with good compression, tensile and bending capabilities is formed.

For the existing composite beam formed by the steel plate and the concrete, the adopted steel plate is rectangular, I-shaped or groove-shaped, the inner side surface of the steel plate is fixedly provided with a connecting stud, then the inner side surface of the steel plate is poured with the concrete, the connecting stud is buried in the concrete, and the connecting stud plays a role in connecting the concrete and the steel plate, so that the steel plate and the concrete are tightly combined together, and the steel plate and the concrete jointly bear bending moment. The steel plate in the existing composite beam is a single layer, and the single layer steel plate can not meet the strength requirement of the bridge in the occasion with large strength requirement. The studs on the existing combined beam are independently welded on the steel plate, when the combined beam is pressed and bent, the stress of each stud is different, the studs with overlarge stress are easy to generate fatigue damage for a long time, the strength of the combined beam can be reduced after the studs are damaged, and the combined beam can be damaged or broken when serious, so that safety accidents are caused.

Disclosure of Invention

The utility model provides a overcome the shortcoming of above-mentioned technical problem, provide a multilayer formula steel sheet-concrete composite beam.

The multi-layer steel plate-concrete composite beam of the utility model has two ends for fixing on the bridge pier; the method is characterized in that: the combined beam consists of a bottom steel plate, a middle steel plate, an upper steel plate, a lower concrete layer and an upper concrete layer, wherein the bottom steel plate, the middle steel plate and the upper steel plate are arranged in parallel, the lower concrete layer is positioned between the bottom steel plate and the middle steel plate, and the upper concrete layer is positioned between the middle steel plate and the upper steel plate; the upper surfaces of the bottom layer steel plate and the middle layer steel plate are uniformly fixed with studs respectively embedded into the lower concrete layer and the upper concrete layer; the two ends of the composite beam are provided with a plurality of beam head columns which are used for fixing the composite beam on the bridge pier, and the middle part of the composite beam is evenly provided with a plurality of middle connecting columns which penetrate through the lower concrete layer and the upper concrete layer to connect the bottom steel plate, the middle steel plate and the upper steel plate together.

The multi-layer steel plate-concrete combined beam has the advantages that the lower end of the beam head column extends out of the bottom steel plate, and the part extending out of the bottom steel plate is used for being fixed on a pier; the upper part of the communication column penetrates through the lower concrete layer and the upper concrete layer, and first through holes through which the beam head columns penetrate are formed in the bottom steel plate, the middle steel plate and the upper steel plate; and the bottom steel plate, the middle steel plate and the upper steel plate are all provided with second through holes through which the middle connecting column passes.

The utility model discloses a multilayer formula steel sheet-concrete composite beam, the peg is arborescent shape, and the peg on bottom steel sheet and the middle floor steel sheet becomes the multirow along its length direction and distributes, and the top of peg is through connecting reinforcement fixed connection in the same line.

The multi-layer steel plate-concrete composite beam of the utility model has 1 or more than 1 layer of middle-layer steel plate.

The utility model has the advantages that: the utility model discloses a steel sheet-concrete composite beam, through setting up the end, in, upper steel sheet and down, go up concrete layer, the bridge that contains 3 at least layers of steel sheets and 2 layers of concrete layers has been formed, the form that current composite beam only adopted the individual layer steel sheet has been changed, adopt multilayer steel sheet and multilayer concrete, utilize the excellent compressive property of concrete and the good tensile effect of steel sheet, make the composite beam who forms have bigger bearing capacity, through with all steel sheet layers in the composite beam together fixed through the middle part spliced pole, and fix the peg that imbeds in concrete layer on the steel sheet, when the bridge atress, every layer of steel sheet in the bridge, the common atress in every layer of concrete layer, the bending deformation that the bearing load causes, the span of composite beam has been increased, and the life of composite beam has been prolonged.

Drawings

FIG. 1 is a schematic view of the multi-layered steel plate-concrete composite beam according to the present invention;

fig. 2 is a front view of the multi-layered steel plate-concrete composite beam of the present invention;

fig. 3 is a plan view of the multi-layered steel plate-concrete composite beam according to the present invention;

fig. 4 is a left side view of the multi-layered steel plate-concrete composite beam of the present invention.

In the figure: 1 pier, 2 combination beams, 3 bottom steel sheets, 4 middle steel sheets, 5 upper steel sheets, 6 lower concrete layers, 7 upper concrete layers, 8 studs, 9 connecting steel bars, 10 beam head columns, 11 middle connecting columns, 12 first through holes and 13 second through holes.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1, the use principle diagram of the multi-layer steel plate-concrete composite beam of the present invention is shown, in the road construction process, when encountering gully, mountain stream, river or collapsible foundation, the bridge needs to be erected according to the actual requirement, the bridge pier is stable, the bearing capacity of the bridge is strong, and the long-term safe use of the bridge can be ensured. In order to increase the bending resistance and span of a bridge, a composite beam formed by steel plates and concrete is gradually adopted at present, but the steel plates in the existing composite beam are all in the shapes of flat plates and U-shaped plates, so that the composite beam is in a structural form of a single-layer steel plate and a single-layer concrete, and the bending resistance of the composite beam has certain limitation.

As shown in fig. 2, fig. 3 and fig. 4, the utility model discloses a multilayer formula steel sheet-concrete composite beam's front view, top view and left side view are given respectively, shown composite beam 2 comprises bottom steel sheet 3, middle level steel sheet 4, upper steel sheet 5, lower concrete layer 6, last concrete layer 7, bottom steel sheet 3, middle level steel sheet 4 and upper steel sheet 5 parallel arrangement, lower concrete layer 6 is formed between bottom steel sheet 3 and middle level steel sheet 4, last concrete layer 7 is formed between middle level steel sheet 4 and upper steel sheet 5.

The both ends of combination roof beam 2 all are provided with many beam head post 10, and on the both ends of combination roof beam 2 were fixed in pier 1 through beam head post 10, beam head post 10 passed concrete layer 6 and last concrete layer 7 down with vertical direction to with bottom steel sheet 3, middle level steel sheet 4 and upper steel sheet 5 fixed connection, all seted up on three-layer steel sheet (3, 4, 5) with beam head post 10 matched with first through-hole 12. The middle part of the composite beam 2 is uniformly provided with a vertical middle connecting column 11, the middle connecting column 11 also penetrates through the lower concrete layer 6 and the upper concrete layer 7, and three layers of steel plates (3, 4 and 5) are connected together, so that the three layers of steel plates (3, 4 and 5) are connected into an integral structure through the beam head column 10 and the middle connecting column 11, the concrete layers are arranged between the adjacent steel plates, when a certain part of a bridge is stressed, all the steel plates and the concrete layers jointly bear stress deformation, and the bearing capacity of the whole composite beam is increased or decreased.

The upper surfaces of the bottom steel plate 3 and the middle steel plate 4 are all fixed with the studs 8, the studs 8 are arranged on the upper surfaces of the steel plates in a row along the length direction of the steel plates, the studs 8 in the same row are connected into a whole through the connecting steel bars 9, the studs 8 and the connecting steel bars 9 are poured in a concrete layer together, and in order to increase the contact area of the studs 8 and the concrete and increase the bending resistance and the cutting resistance of the bridge, the studs 8 can adopt a tree shape. According to the composite beam, the multilayer steel plates and the multilayer concrete layers are adopted, so that stress on a certain position of the bridge is converted into integral stress of the bridge, the bending resistance and torsional shear resistance of the whole bridge are effectively improved, and the bridge with larger span and longer service life can be manufactured.

The manufacturing steps of the multi-layer steel plate-concrete composite beam of the utility model are as follows:

1. firstly, prefabricating the lower part of a beam head column 10 to the upper end of a pier 1;

2. after the maintenance of the pier 1 is finished, inserting the first through holes 12 at two ends of the bottom steel plate 3 into the corresponding beam head columns 10 respectively, and welding the beam head columns 10 and the bottom steel plate together; then, inserting a middle connecting column 11 into a second through hole 13 of the bottom steel plate 3;

3. then, the studs 8 are welded on the upper surface of the bottom steel plate 3, and the studs 8 in the same row are welded together by using connecting steel bars 9;

4. after the periphery of the bottom steel plate 3 is built with the enclosure, a lower concrete layer 6 is poured and maintained;

5. After the lower concrete layer 6 is cured, the middle steel plate 4 is inserted into the beam head column 10 and the middle connecting columns 11, and each middle connecting column 11 is welded with the middle steel plate 4; then, building a surrounding barrier on the periphery of the middle steel plate 4, pouring a concrete layer 6, and maintaining;

6. finally, the upper steel plate 5 is inserted into the beam head column 10 and the middle connecting column 11, and the beam head column 10 and the middle connecting column 11 are welded with the upper steel plate 5. The road surface can be built on the formed upper steel plate 5.

Claims

1. A multi-layer steel plate-concrete composite beam is characterized in that two ends of a composite beam (2) are used for being fixed on a pier (1); the method is characterized in that: the combined beam consists of a bottom steel plate (3), a middle steel plate (4), an upper steel plate (5), a lower concrete layer (6) and an upper concrete layer (7), wherein the bottom steel plate, the middle steel plate and the upper steel plate are arranged in parallel, the lower concrete layer is positioned between the bottom steel plate and the middle steel plate, and the upper concrete layer is positioned between the middle steel plate and the upper steel plate; the upper surfaces of the bottom layer steel plate and the middle layer steel plate are uniformly fixed with studs (8) which are respectively embedded into the lower concrete layer and the upper concrete layer; the two ends of the composite beam are provided with a plurality of beam head columns (10) which are used for fixing the composite beam on the bridge pier, and the middle part of the composite beam is evenly provided with a plurality of middle connecting columns (11) which penetrate through the lower concrete layer and the upper concrete layer to connect the bottom steel plate, the middle steel plate and the upper steel plate together.

2. The multi-layered steel plate-concrete composite beam according to claim 1, wherein: the lower end of the beam head column (10) extends out of the bottom steel plate (3), and the part extending out of the bottom steel plate is used for being fixed on the pier (1); the upper part of the communication column penetrates through the lower concrete layer (6) and the upper concrete layer (7), and first through holes through which the beam head columns (10) penetrate are formed in the bottom steel plate (3), the middle steel plate (4) and the upper steel plate (5); and the bottom steel plate, the middle steel plate and the upper steel plate are all provided with second through holes (13) through which the middle connecting columns (11) penetrate.

3. The multi-layered steel plate-concrete composite beam according to claim 1 or 2, wherein: the studs (8) are tree-shaped, the studs (8) on the bottom steel plate (3) and the middle steel plate (4) are distributed in multiple rows along the length direction of the studs, and the tops of the studs in the same row are fixedly connected through connecting steel bars (9).

4. The multi-layered steel plate-concrete composite beam according to claim 1 or 2, wherein: the number of the layers of the middle steel plate (4) is 1 or more than 1.