阅读说明：本技术 一种用于钢-混组合梁中的连杆群装置及施工方法 (Connecting rod group device for steel-concrete composite beam and construction method ) 是由 余晓琳 余春益 贾布裕 陈宇轩 吴毓 谭仲德 罗宇蕃 茅思奕 陈扬文 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种用于钢-混组合梁中的连杆群装置及施工方法,包括钢梁和组合钉,所述组合钉与钢梁焊接,所述组合钉包括第一栓钉、第二栓钉和第三栓,所述第一栓钉与第二栓钉之间的下端设有连接杆,所述第二栓钉与第三栓钉之间的上端设有连接杆,所述第一栓钉、第二栓钉和第三栓钉的底部均焊接与钢梁,第一栓钉、第二栓钉和第三栓钉与钢梁焊接,在第一栓钉与第二栓钉之间焊接连接杆,以及第二栓钉与第三栓钉之间焊接连接杆,浇筑UHPC,完成连杆群装置的施工连接杆在不同高度位置使连杆群装置中每排组合钉承受较为均匀的剪力,从而提高连钢-混组合梁的抗剪承载力与抗剪刚度。(The invention discloses a connecting rod group device used in a steel-concrete composite beam and a construction method thereof, comprising a steel beam and a composite nail, the combined nail is welded with the steel beam and comprises a first bolt nail, a second bolt nail and a third bolt, a connecting rod is arranged at the lower end between the first stud and the second stud, a connecting rod is arranged at the upper end between the second stud and the third stud, the bottoms of the first stud, the second stud and the third stud are welded with the steel beam, and welding connecting rods between the first stud and the second stud and between the second stud and the third stud, pouring UHPC, and finishing the construction of the connecting rod group device to ensure that each row of combined nails in the connecting rod group device bear more uniform shearing force at different height positions, thereby improving the shearing resistance bearing capacity and the shearing resistance rigidity of the connecting steel-concrete combined beam.)

1. A connecting rod group device used in a steel-concrete composite beam, which is characterized in that: the combined nail comprises a steel beam and a combined nail, wherein the combined nail is welded with the steel beam, the combined nail comprises a first stud, a second stud and a third stud, a connecting rod is arranged at the lower end between the first stud and the second stud, a connecting rod is arranged at the upper end between the second stud and the third stud, and the bottoms of the first stud, the second stud and the third stud are all welded on the steel beam.

2. The connecting rod group device for the steel-concrete composite beam as claimed in claim 1, wherein: and a connecting rod is arranged in the middle between the first stud and the third stud.

3. The connecting rod group device for the steel-concrete composite beam as claimed in claim 1, wherein: the number of the combined nails is at least three, the combined nails are vertically arranged to one row, and the connecting rods of the adjacent combined nails are arranged in a staggered manner in the horizontal direction.

4. The connecting rod group device for the steel-concrete composite beam as claimed in claim 1, wherein: the top of the first bolt pin, the top of the second bolt pin and the top of the third bolt pin are all provided with a nail cap.

5. The connecting rod group device for the steel-concrete composite beam as claimed in claim 1, wherein: the composite nail also comprises a UHPC block, and the UHPC block is adhered with the composite nail.

6. The connecting rod group device for the steel-concrete composite beam as claimed in claim 2, wherein: the connecting rod is horizontal setting for the girder steel.

7. The connecting rod group device for the steel-concrete composite beam as claimed in claim 1, wherein: the diameter of the connecting rod is 33% -60% of the diameter of the first stud.

8. A construction method of a connecting rod group device used in a steel-concrete composite beam based on any one of claims 1 to 7 is characterized in that: welding a first stud, a second stud and a third stud with a steel beam, welding a connecting rod between the first stud and the second stud, welding a connecting rod between the second stud and the third stud, pouring UHPC, and finishing the construction of the connecting rod group device.

Technical Field

The invention relates to the technical field of bridge structures, in particular to a connecting rod group device for a steel-concrete composite beam and a construction method.

Background

In the construction of the composite beam, the construction of the cast-in-place bridge deck slab not only requires a long construction period, but also when prestress is applied to the bridge deck slab in the hogging moment area of the composite beam bridge, the prestress applied to the bridge deck slab by various methods is also transmitted to the steel beam through the stud, so that the prestress applied to the bridge deck slab is greatly lost. In order to solve the problems, the prefabricated bridge deck with the reserved holes can be prestressed firstly, then the studs are concentrated into groups at small intervals, the stud groups arranged along the longitudinal bridge direction are arranged at large intervals, and after the prefabricated bridge deck is placed at the corresponding positions of the steel beams, concrete is cast in the reserved holes of the bridge deck in situ.

By the method, the construction of the combined beam can be accelerated, the effective pre-pressure in the bridge deck slab in the hogging moment area can be ensured, and the steel beam and the bridge deck slab can be well combined. The existing group nail device is as follows: 1. although the shear-resistant bearing capacity and shear-resistant rigidity of the group nail connecting piece can be improved by pouring the high-strength cement-based material into and around the metal corrugated sleeve, the structural ductility is reduced due to the high elastic modulus property of the high-strength cement-based material, and certain manual operation amount is required for cutting, installing and adjusting the corrugated sleeve in the construction of the metal corrugated sleeve; 2. dumbbell type toggle pin shear connector device has adopted comparatively simple and convenient structure to improve the anti shear capacity of crowd's nail, nevertheless when the toggle pin interval is limited or the concrete intensity is lower, the concrete between the toggle pin is changeed and is damaged under the shear force effect, under the curved shear destruction condition of toggle pin, the great regional height of dumbbell type bottom diameter needs to be higher, otherwise can't reach the purpose that improves crowd's nail bearing capacity, more material quantity of corresponding needs.

Although the two nail cluster devices can improve the shearing resistance bearing capacity of the nail cluster, the problem of uneven stress of the stud nails in the nail cluster can not be solved, and the ultimate bearing capacity of the nail cluster is greatly reduced.

Disclosure of Invention

In view of the technical problems in the prior art, the present invention is directed to a connecting rod group device for use in a steel-concrete composite girder. The shear-resistant bearing capacity and the shear-resistant rigidity of the steel-concrete composite beam are improved.

Another object of the present invention is to provide a construction method of a link group device for a steel-concrete composite girder. The construction method is convenient to process and flexibly install on a construction site.

In order to achieve the purpose, the invention adopts the following technical scheme:

the connecting rod group device comprises a steel beam and a combined nail, wherein the combined nail is welded with the steel beam, the combined nail comprises a first stud, a second stud and a third stud, a connecting rod is arranged at the lower end between the first stud and the second stud, a connecting rod is arranged at the upper end between the second stud and the third stud, and the bottoms of the first stud, the second stud and the third stud are welded on the steel beam.

Preferably, a connecting rod is arranged in the middle between the first bolt and the third bolt

Preferably, the number of the combined nails is at least three, the combined nails are vertically arranged in a row, and the connecting rods of adjacent combined nails are staggered in the horizontal direction.

Preferably, the tops of the first pin, the second pin and the third pin are provided with screw caps.

Preferably, the connecting rod group device also comprises a UHPC block, and the UHPC block is bonded with the combination nail.

Preferably, the connecting rod is arranged horizontally relative to the steel beam.

Preferably, the diameter of the connecting rod is 33 to 60% of the diameter of the first peg.

A construction method of the connecting rod group device for the steel-concrete composite beam based on the construction method comprises the steps of welding a first stud, a second stud and a third stud with a steel beam, welding a connecting rod between the first stud and the second stud and between the second stud and the third stud, and pouring UHPC to finish construction of the connecting rod group device.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the invention relates to a connecting rod group device used in a steel-concrete composite beam, wherein a connecting rod is arranged at the lower end between a first stud and a second stud of the connecting rod group device, a connecting rod is arranged at the upper end between the second stud and a third stud, the bottoms of the first stud, the second stud and the third stud are welded with a steel beam, and the connecting rods enable each row of composite nails in the connecting rod group device to bear more uniform shearing force at different height positions, so that the shearing resistance bearing capacity and the shearing rigidity of the steel-concrete composite beam are improved.

2. The connecting rod group device for the steel-concrete composite beam is characterized in that the connecting rod group device comprises at least three groups of composite nails, the composite nails are vertically arranged in a row, and the connecting rods of adjacent composite nails are arranged in a staggered manner in the horizontal direction, so that the structure of the connecting rod group device has certain ductility.

3. The invention is used for the connecting rod group device in the steel-concrete composite beam, and the top parts of the first bolt, the second bolt and the third bolt of the connecting rod group device are all provided with the nail caps, so that the pulling resistance of the connecting rod group device is improved.

4. The connecting rod group device is used in the steel-concrete composite beam, the combined nail of the connecting rod group device is combined with the UHPC block for use, and the shearing resistance and the pulling resistance of the connecting rod group device can be fully exerted under the combined action of the strong rigidity of the combined nail and the excellent compressive strength of the UHPC.

5. The construction method of the connecting rod group device used in the steel-concrete composite beam is convenient for processing and flexible installation on a construction site, improves the construction efficiency, and has low cost by adopting installed accessories.

Drawings

Fig. 1 is a first schematic view of a connecting rod group device used in a steel-concrete composite beam according to the present invention.

Fig. 2 is a second schematic view of a connecting rod group device for a steel-concrete composite beam according to the present invention.

FIG. 3 is a schematic view of a gang nail according to a first embodiment of the invention.

FIG. 4 is a schematic view of a gang nail according to a second embodiment of the invention.

Wherein, 1 is the girder steel, 2 is the combination nail, 21 is the first toggle bolt, 22 is the second toggle bolt, 23 is the third toggle bolt, 201 is the nut, 3 connecting rods, 4 is the UHPC piece.

Detailed Description

The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.

Example one

As shown in fig. 1 to 4, a link group apparatus for a steel-concrete composite girder includes a steel girder 1 and a composite nail 2, the composite nail 2 is welded to the steel girder 1, the composite nail 2 includes a first peg 21, a second peg 22 and a third peg 23, a connecting rod 3 is provided between the first peg 21 and the second peg 22 at a lower end thereof, a connecting rod 3 is provided between the second peg 22 and the third peg 23 at an upper end thereof, bottoms of the first peg 21, the second peg 22 and the third peg 23 are welded to the steel girder 1, the first peg 21, the second peg 22 and the third peg 23 have the same structure, and the connecting rod 3 is provided at different height positions between the first peg 21, the second peg 22 and the third peg 23 in the steel-concrete composite girder considering only the transverse capacity of a connecting member in general, the connecting rod 3 can increase the structural integrity of the link group apparatus, therefore, the shearing forces applied to the first bolt 21, the second bolt 22 and the third bolt 23 are balanced, and the connecting rod 3 can increase the shearing force applied to the bolts more uniformly, so that the shearing-resistant bearing capacity and the shearing-resistant rigidity of the connecting rod group device are improved.

The number of the combined nails 2 is at least three, the combined nails 2 are vertically arranged in a row, the connecting rods 3 of the adjacent combined nails 2 are arranged in a staggered manner in the horizontal direction, and the connecting rod group device with the three groups of combined nails 2 arranged in a rectangular shape is adopted, so that the structure of the connecting rod group device has certain ductility.

The top of the first bolt 21, the top of the second bolt 22 and the top of the third bolt 23 are all provided with a nail cap 201, so that the anti-pulling performance of the connecting rod group device is improved.

The connecting rod group device also comprises a UHPC block 4, the UHPC is noted as ultra-high performance concrete in Chinese, the compression strength of the UHPC can reach 810Mpa at the highest, and the UHPC block 4 has the characteristics of high strength, high durability and high workability, the UHPC block 4 is bonded with the combined nail 2, the combined nail 2 is combined with the UHPC block 4 for use, and the shearing resistance and the pulling resistance of the connecting rod group device can be fully exerted under the combined action of the strong rigidity of the combined nail 2 and the excellent compression strength of the UHPC.

The connecting rod 3 is horizontally arranged relative to the steel beam 1. The connecting rod 3, the first bolt pin 21, the second bolt pin 22 and the third bolt pin 23 form a door-shaped structure, and the integral shearing resistance of the connecting rod group device is enhanced.

The diameter of the connecting rod 3 is 33-60% of the diameter of the first stud 21. The diameter of the connecting rod 3 in this embodiment is 50% of the diameter of the first pin 21, and the connecting rod 3 mainly transmits shear force to the first pin 21, the second pin 22 and the third pin 23, so that the structural integrity of the combined nail 2 is stronger, and unnecessary material waste can be reduced, so that the combined nail 2 can meet the shear resistance requirement of the steel-concrete combined structure.

A construction method for a connecting rod group device in a steel-concrete composite beam based on the above comprises the steps of welding a first bolt 21, a second bolt 22 and a third bolt 23 with a steel beam, welding a connecting rod 3 between the first bolt 21 and the second bolt 22, welding the connecting rod 3 between the second bolt 22 and the third bolt 23, and pouring UHPC to finish the construction of the connecting rod group device. The construction method is simple, processing and flexible installation are facilitated on a construction site, UHPC can be poured once only by welding the combination nails 2 to the steel beam, the UHPC does not need to be poured for many times, the steel beam 1 is generally an I-shaped steel beam, a box girder and a steel truss girder, and therefore the shearing resistance requirement of the steel-concrete combination is met.

Example two

The connecting rod group device for the steel-concrete composite beam is the same as the first embodiment except for the following technical characteristics:

the connecting rod 3 is arranged in the middle between the first stud 21 and the third stud 23, and generally in a steel-concrete composite structure beam, the connecting rod 3 is arranged at the same height of the composite nail 2 according to the required shearing resistance of the composite nail 2 only by considering the transverse shearing resistance of the connecting device, and when the connecting rod 3 is positioned on the same straight line, the shear force transmission among the first stud 21, the second stud 22 and the third stud 23 is facilitated, the shearing resistance bearing capacity and the shearing resistance rigidity of the composite nail 2 are increased, and meanwhile, the construction and installation of constructors are facilitated.

The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.