阅读说明：本技术 用于装配式钢混组合梁的抗震联结结构 (Anti-seismic coupling 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抗震联结结构,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母件；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公件；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,多个公件一一对应地插入在多个母件中；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抗震联结结构,该方案施工方便,能有效提高结构的抗剪承载力,并且在粘结体破坏后能通过滑动对地震能量起到吸收效果。(The invention discloses an anti-seismic 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 female parts 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, and the lower end face of the second connecting ridge is provided with a plurality of male parts; 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 plurality of male parts are inserted into the plurality of female parts in a one-to-one correspondence manner; the beneficial technical effects of the invention are as follows: the scheme is convenient to construct, can effectively improve the shearing-resistant bearing capacity of the structure, and can absorb the seismic energy through sliding after the bonding body is damaged.)

1. The utility model provides an antidetonation 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 grooves are formed in the upper end face of the first connecting ridge (1), and a female part (11) is arranged in each semicircular groove; the female part (11) is of an inwards concave spherical disc-shaped structure, and the outer diameter of the female part (11) is larger than the thickness of the first connecting ridge (1);

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 male parts (21) are arranged on the lower end face of the second connecting ridge (2), and the male parts (21) correspond to the female parts (11) one by one; the male part (21) is of a hemispherical structure, and the size of the male part (21) is matched with that of the female part (11);

during assembly, a concrete bridge deck is placed on a 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, a plurality of male parts (21) on the second connecting ridge (2) are inserted into a plurality of female parts (11) on the first connecting ridge (1) in a one-to-one correspondence manner, mortar is poured into the grooves, and a bonding body is formed after the mortar is cured; the bonding body wraps the first connecting ridge (1), the female part (11), the second connecting ridge (2) and the male part (21); after the bonding body is broken due to earthquake, the male part (21) and the female part (11) can slide relatively in a certain range.

2. An earthquake-resistant coupling structure for an assembled steel-concrete composite girder according to claim 1, 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.

Technical Field

The invention relates to a bridge structure, in particular to an anti-seismic 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 an anti-seismic 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 grooves are formed in the upper end face of the first connecting ridge, and a female part is arranged in each semicircular groove; the female part is of an inwards concave spherical disc-shaped structure, and the outer diameter of the female part is larger than the thickness of the first connecting ridge;

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 male parts are arranged on the lower end surface of the second connecting ridge, and correspond to the female parts one by one; the male part is of a hemispherical structure, and the size of the male part is matched with that of the female part;

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, the male parts on the second connecting ridge are inserted into the female parts on the first connecting ridge in a one-to-one correspondence manner, mortar is poured into the grooves, and a bonding body is formed after the mortar is cured; the bonding body wraps the first connecting ridge, the female part, the second connecting ridge and the male part; after the bonding body is damaged due to an earthquake, the male part and the female part can slide relatively within a certain range.

In specific implementation, the male part and the female part are made of steel and are welded on the corresponding connecting ridges.

The principle of the scheme is as follows: the male part and the female part are respectively formed on the first connecting ridge and the second connecting ridge in a prefabricating mode, the first connecting ridge and the second connecting ridge are also respectively formed on the steel box girder and the concrete bridge deck in a prefabricating mode, the on-site manufacturing process is omitted, when the concrete bridge deck is installed, the concrete bridge deck can be installed only by mutually aligning the male part and the female part, the installation operation is very convenient, the construction flow can be greatly simplified, and the construction period is shortened; in the service process of the bridge, the transverse and longitudinal shearing forces are borne by the friction force between the male member and the female member and the bonding force between each structure and the bonding body, and the vertical lifting force is resisted; under the earthquake condition, after the earthquake reaches a certain intensity, the bonding body can be firstly destroyed, at the moment, because the male part and the female part are matched by the spherical surface, when small relative shaking occurs between the steel box girder and the concrete bridge deck, the male part and the female part can slide in a reciprocating manner within a certain range, thereby absorbing the earthquake energy and playing a certain earthquake-proof effect.

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.

The beneficial technical effects of the invention are as follows: the scheme is convenient to construct, can effectively improve the shearing-resistant bearing capacity of the structure, and can absorb the seismic energy through sliding after the bonding body is damaged.

Drawings

FIG. 1 is a schematic diagram of a semi-sectioned explosive structure of the present invention;

FIG. 2 is a schematic sectional view of the male and female members at the junction;

FIG. 3 is a schematic structural view of a concrete bridge deck;

the names corresponding to each mark in the figure are respectively: the first connecting ridge 1, the female part 11, the second connecting ridge 2, the male part 21, the steel box girder 3, the flange plate 31, the concrete bridge deck 4, the groove 5, the grouting hole 6 and the bonding body 7.

Detailed Description

The utility model provides an antidetonation 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 grooves are formed in the upper end face of the first connecting ridge 1, and a female part 11 is arranged in each semicircular groove; the female part 11 is of an inwards concave spherical disc-shaped structure, and the outer diameter of the female part 11 is larger than the thickness of the first connecting ridge 1;

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 male parts 21 are arranged on the lower end surface of the second connecting ridge 2, and the male parts 21 correspond to the female parts 11 one by one; the male part 21 is of a hemispherical structure, and the size of the male part 21 is matched with that of the female part 11;

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, the male parts 21 on the second connecting ridges 2 are inserted into the female parts 11 on the first connecting ridges 1 in a one-to-one correspondence manner, mortar is poured into the grooves, and a bonding body is formed after the mortar is cured; the bonding body wraps the first connecting ridge 1, the female part 11, the second connecting ridge 2 and the male part 21; after the bonding body is broken due to the earthquake, the male element 21 and the female element 11 can slide relatively in a certain range.

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.