阅读说明：本技术 用于装配式钢混组合梁的剪力联结结构 (Shear force connecting structure for assembled steel-concrete composite beam ) 是由 胡俊 俞登荣 谭少华 严春明 梁超贤 周玉坤 徐俊欣 范传振 于 2021-02-04 设计创作，主要内容包括：本发明公开了一种用于装配式钢混组合梁的剪力联结结构,包括钢箱梁和混凝土桥面板,钢箱梁的两个翼缘板上各设置有一条第一连接脊；第一连接脊的上端面上设置有多个半圆形凸起；混凝土桥面板的下侧面上设置有两条凹槽；凹槽底部设置有第二连接脊；第二连接脊的下端面上设置有多个半圆形卡槽；组装时,混凝土桥面板放在钢箱梁的翼缘板上,混凝土桥面板的下端面与翼缘板的上端面接触,第一连接脊上的半圆形凸起插入在相应第二连接脊上的半圆形卡槽中。本发明的有益技术效果是：提出了一种用于装配式钢混组合梁的剪力联结结构,该方案能大幅提高结构的抗剪承载力,并且还能有效简化装配操作,提高施工效率、降低施工成本。(The invention discloses a shear force connecting structure for an assembled steel-concrete composite beam, which comprises a steel box beam and a concrete bridge deck, wherein two flange plates of the steel box beam are respectively provided with a first connecting ridge; a plurality of semicircular bulges are arranged on the upper end surface of the first connecting ridge; two grooves are arranged on the lower side surface of the concrete bridge deck; the bottom of the groove is provided with a second connecting ridge; a plurality of semicircular clamping grooves are formed in the lower end face of the second connecting ridge; during the equipment, the concrete decking is put on the flange board of steel box girder, and the lower terminal surface of concrete decking contacts with the up end of flange board, and the semicircular bulge on the first connection ridge inserts in the semicircular clamping groove on corresponding second connection ridge. The beneficial technical effects of the invention are as follows: the shear force connecting structure for the assembly type steel-concrete composite beam can greatly improve the shear-resistant bearing capacity of the structure, effectively simplify assembly operation, improve construction efficiency and reduce construction cost.)

1. The utility model provides a shear force connection structure for assembled steel-concrete composite beam, includes steel box girder and concrete decking, steel box girder and concrete decking are the prefab, its characterized in that: two flange plates of the steel box girder are respectively provided with a first connecting ridge (1), the axial direction of the first connecting ridge (1) is parallel to the axial direction of the flange plates, and the length of the first connecting ridge (1) is equal to that of the flange plates; a plurality of semicircular bulges are arranged on the upper end surface of the first connecting ridge (1) and are distributed at equal intervals;

two grooves are arranged on the lower side surface of the concrete bridge deck and are communicated with the front end surface and the rear end surface of the concrete bridge deck; the axial direction of the groove is parallel to the axial direction of the concrete bridge deck; the bottom of the groove is provided with a second connecting ridge (2), the axial direction of the second connecting ridge (2) is parallel to the axial direction of the groove, and the length of the second connecting ridge (2) is matched with that of the first connecting ridge (1); the two second connecting ridges (2) are respectively opposite to the two first connecting ridges (1); a plurality of semicircular clamping grooves are formed in the lower end face of the second connecting ridge (2), and correspond to the semicircular bulges one by one;

during assembly, the concrete bridge deck is placed on the flange plate of the steel box girder, the lower end face of the concrete bridge deck is in contact with the upper end face of the flange plate, and the semicircular bulge on the first connecting ridge (1) is inserted into the semicircular clamping groove on the corresponding second connecting ridge (2).

2. A shear coupling structure for an assembled steel-concrete composite beam according to claim 1, wherein: two grouting holes are formed in the concrete bridge deck; the upper ends of the grouting holes are communicated with the upper end face of the concrete bridge deck, the lower ends of the grouting holes are communicated with the grooves, and the two grouting holes correspond to the two grooves respectively; and after the concrete bridge deck and the steel box girder are connected, pouring bonding mortar into the groove through the grouting hole.

3. The shear coupling structure for an assembled steel-concrete composite beam according to claim 2, wherein: a plurality of first semicircular notches are formed in the upper end face of the first connecting ridge (1), and the first semicircular notches and the semicircular bulges are alternately arranged; a plurality of second semicircular notches are formed in the lower end face of the second connecting ridge (2), and the arrangement positions of the second semicircular notches correspond to the first semicircular notches one by one; when the semicircular bulge is inserted into the semicircular clamping groove, the first semicircular notch and the second semicircular notch are encircled to form a circular hole.

4. A shear coupling structure for an assembled steel-concrete composite beam according to claim 1, 2 or 3, wherein: the first connecting ridge (1) and the second connecting ridge (2) are both made of patterned steel plates; the first connecting ridge (1) is welded on the flange plate; the upper part of the second connecting ridge (2) is embedded in the concrete bridge deck.

5. The shear coupling structure for an assembled steel-concrete composite beam according to claim 4, wherein: the first connecting ridge (1) and the second connecting ridge (2) which are matched with each other are cut by a whole piece of pattern steel plate.

Technical Field

The invention relates to a bridge structure, in particular to a shear force connecting structure for an assembled steel-concrete composite beam.

Background

In a steel-concrete composite beam bridge in the prior art, a concrete bridge deck and a steel box girder are connected into a whole through a shear connector to participate in the stress process of a structure together. Common shear connectors mainly comprise four types, namely a steel bar connector, a profile steel connector, a PBL connector and a stud connector; among them, the stud connector and the PBL connector are currently most widely used in engineering; the PBL connecting piece resists longitudinal shearing force mainly through the concrete tenon and the through reinforcing steel bars in the holes, the through reinforcing steel bars in the holes can improve the ultimate bearing capacity of the connecting piece to a great extent, but the through reinforcing steel bars need to be arranged in the holes, so that great inconvenience is brought to construction, and the manufacturing process is time-consuming and labor-consuming; the stud connecting piece needs to reserve a hole for pouring concrete, so that the shear force transmission between a steel-concrete interface is discontinuous, a concrete slab has a split area, the amount of concrete poured in a shear groove hole is small, the number of the shear groove holes is large, and the quality is not easy to guarantee; the integrity of the bridge deck is poor, the quality of wet joint concrete is not easy to guarantee, and the interface of new and old concrete is easy to crack; in conclusion, the existing connection mode needs more concrete cast-in-place procedures, has longer field construction period and is not beneficial to the rapid construction of the steel-concrete combined structure.

Chinese patent No. CN201510618404.1 proposes a novel concrete slab with a channel at the bottom, which can form a novel self-locking steel-concrete connecting piece by arranging a channel at the bottom of the concrete bridge deck slab to match with the steel beam, although this technique effectively solves the problems of corrosion of steel-concrete junction surface, concrete cracking, and difficult control of post-cast concrete quality, this technique mainly relies on the adhesive force and friction between the connecting piece and mortar to resist shearing force, and is easy to break under the action of large load.

Chinese patent No. CN201620452745.6 proposes an apertured plate connecting piece with a boot-shaped slot, a steel beam and a steel plate with positive anisotropy, wherein one side of the apertured plate connecting piece is a straight profile, and the other side of the apertured plate connecting piece is repeatedly arranged with a convex connector and a concave slot, and the concave slot is boot-shaped; the shape of the convex connector is identical to that of the concave slotted hole and has the same size after being rotated by 180 degrees; after one of the two perforated plate connecting pieces with the same size is rotated by 180 degrees, the convex connecting heads and the concave slotted holes of the two perforated plate connecting pieces are just embedded, butted and buckled into a complete batten; the utility model discloses a though solved effectively and alternate the process of arranging the reinforcing bar, reduced the input of manpower, but this utility model still does not break away from the construction process who arranges reinforcing bar and cast in situ concrete decking on the connecting piece, and the bridge that needs quick construction still is not very suitable for.

From the current situation, it is necessary to improve the connection mode of the concrete bridge deck and the steel box girder, so that the construction process can be simplified and the construction period can be shortened under the condition of meeting the requirement of high shear bearing capacity.

Disclosure of Invention

Aiming at the problems in the background art, the invention provides a shear force connecting structure for an assembled steel-concrete composite beam, which comprises a steel box beam and a concrete bridge deck, wherein the steel box beam and the concrete bridge deck are both prefabricated parts, and the innovation is as follows: two flange plates of the steel box girder are respectively provided with a first connecting ridge, the axial direction of the first connecting ridge is parallel to the axial direction of the flange plates, and the length of the first connecting ridge is equal to that of the flange plates; a plurality of semicircular bulges are arranged on the upper end surface of the first connecting ridge and are distributed at equal intervals;

two grooves are arranged on the lower side surface of the concrete bridge deck and are communicated with the front end surface and the rear end surface of the concrete bridge deck; the axial direction of the groove is parallel to the axial direction of the concrete bridge deck; the bottom of the groove is provided with a second connecting ridge, the axial direction of the second connecting ridge is parallel to the axial direction of the groove, and the length of the second connecting ridge is matched with that of the first connecting ridge; the two second connecting ridges are respectively opposite to the two first connecting ridges; a plurality of semicircular clamping grooves are formed in the lower end face of the second connecting ridge, and the semicircular clamping grooves correspond to the semicircular bulges one to one;

during the equipment, the concrete decking is put on the flange board of steel box girder, and the lower terminal surface of concrete decking contacts with the up end of flange board, and the semicircular bulge on the first connection ridge inserts in the semicircular clamping groove on corresponding second connection ridge.

The principle of the invention is as follows: the first connecting ridge and the second connecting ridge can be respectively formed on the steel box girder and the concrete bridge deck slab in a prefabricating mode, so that the field manufacturing process is omitted, when the concrete bridge deck slab is installed, the concrete bridge deck slab can be installed only by aligning the semicircular bulges and the semicircular clamping grooves mutually, the installation and the operation are very convenient, the construction flow can be greatly simplified, and the construction period is shortened; the semicircular bulges are inserted into the semicircular clamping grooves, so that the effect of a buckle can be achieved, the shearing resistance bearing capacity of the connecting structure is obviously improved, and the integrity of the combined structure is better.

Preferably, two grouting holes are arranged in the concrete bridge deck; the upper ends of the grouting holes are communicated with the upper end face of the concrete bridge deck, the lower ends of the grouting holes are communicated with the grooves, and the two grouting holes correspond to the two grooves respectively; and after the concrete bridge deck and the steel box girder are connected, pouring bonding mortar into the groove through the grouting hole. In order to further improve the shearing resistance bearing capacity, then set up the grout hole in concrete bridge panel, during the concrete implementation, the space in the recess is filled completely by the bonding mortar, and second connection spine and first connection spine are wrapped up by the bonding mortar, and at this moment, the atress between the structure is adhesion force + buckle effect, can obviously promote the shearing resistance bearing capacity of structure.

Preferably, a plurality of first semicircular notches are formed in the upper end face of the first connecting ridge, and the first semicircular notches and the semicircular protrusions are alternately arranged; a plurality of second semicircular notches are formed in the lower end face of the second connecting ridge, and the arrangement positions of the second semicircular notches correspond to the first semicircular notches one by one; when the semicircular bulge is inserted into the semicircular clamping groove, the first semicircular notch and the second semicircular notch are encircled to form a circular hole. After the improved scheme is adopted on the basis of the scheme of pouring the bonding mortar, the bonding mortar can form a PBL shear key at the round hole, at the moment, the stress between the structures is bonding force, buckling action and the PBL shear key, and the shearing resistance bearing capacity of the structures is further improved.

Preferably, the first connecting ridges and the second connecting ridges are both made of patterned steel plates; the first connecting ridge is welded on the flange plate; the upper part of the second connecting ridge is embedded in the concrete bridge deck.

Preferably, the first connecting ridges and the second connecting ridges, which are matched with each other, are cut from a single piece of pattern steel plate. When the scheme is adopted, the semicircular bulges and the semicircular clamping grooves which are matched with each other can be accurately matched, and the processing difficulty is effectively reduced.

The beneficial technical effects of the invention are as follows: the shear force connecting structure for the assembly type steel-concrete composite beam can greatly improve the shear-resistant bearing capacity of the structure, effectively simplify assembly operation, improve construction efficiency and reduce construction cost.

Drawings

FIG. 1 is a schematic view of a half-section structure of the present invention;

FIG. 2 is a semi-sectional exploded view of the present invention;

FIG. 3 is a schematic view of a half-section structure when a PBL shear key scheme is adopted;

FIG. 4 is a schematic view of a concrete deck structure;

FIG. 5 is a first view (without a circular hole) illustrating the mating relationship of the first connecting ridge and the second connecting ridge;

FIG. 6 is a schematic view of the mating relationship of the first connecting ridge and the second connecting ridge (with a circular hole);

the names corresponding to each mark in the figure are respectively: the first connecting ridge 1, the second connecting ridge 2, the steel box girder 3, the flange plate 31, the concrete bridge deck 4, the round hole 5, the groove 6 and the grouting hole 7.

Detailed Description

The utility model provides a shear force connection structure for assembled steel-concrete composite beam, includes steel box girder and concrete decking, steel box girder and concrete decking are the prefab, and its innovation lies in: two flange plates of the steel box girder are respectively provided with a first connecting ridge 1, the axial direction of the first connecting ridge 1 is parallel to the axial direction of the flange plates, and the length of the first connecting ridge 1 is equal to that of the flange plates; a plurality of semicircular bulges are arranged on the upper end surface of the first connecting ridge 1 and are distributed at equal intervals;

two grooves are arranged on the lower side surface of the concrete bridge deck and are communicated with the front end surface and the rear end surface of the concrete bridge deck; the axial direction of the groove is parallel to the axial direction of the concrete bridge deck; the bottom of the groove is provided with a second connecting ridge 2, the axial direction of the second connecting ridge 2 is parallel to the axial direction of the groove, and the length of the second connecting ridge 2 is matched with that of the first connecting ridge 1; the two second connecting ridges 2 are respectively opposite to the two first connecting ridges 1; a plurality of semicircular clamping grooves are formed in the lower end face of the second connecting ridge 2 and correspond to the semicircular bulges one by one;

during the equipment, the concrete decking is put on the flange board of steel box girder, and the lower terminal surface of concrete decking contacts with the up end of flange board, and the semicircular bulge on first connection ridge 1 inserts in the semicircular clamping groove on corresponding second connection ridge 2.

Furthermore, two grouting holes are formed in the concrete bridge deck; the upper ends of the grouting holes are communicated with the upper end face of the concrete bridge deck, the lower ends of the grouting holes are communicated with the grooves, and the two grouting holes correspond to the two grooves respectively; and after the concrete bridge deck and the steel box girder are connected, pouring bonding mortar into the groove through the grouting hole.

Furthermore, a plurality of first semicircular notches are formed in the upper end face of the first connecting ridge 1, and the first semicircular notches and the semicircular bulges are alternately arranged; a plurality of second semicircular notches are formed in the lower end face of the second connecting ridge 2, and the arrangement positions of the second semicircular notches correspond to the first semicircular notches one by one; when the semicircular bulge is inserted into the semicircular clamping groove, the first semicircular notch and the second semicircular notch are encircled to form a circular hole.

Furthermore, the first connecting ridges 1 and the second connecting ridges 2 are both made of patterned steel plates; the first connecting ridge 1 is welded on the flange plate; the upper part of the second connecting ridge 2 is pre-buried in the concrete deck slab.

Further, the first connecting ridges 1 and the second connecting ridges 2, which are matched with each other, are cut from a single piece of pattern steel plate.