CN106436927B - Universal assembly type connecting system for two-way bending box-shaped section rods - Google Patents

Abstract

A system for the universal fitting and connection of rods of a section of a two-way bent box type, comprising: a. a pair of symmetrically disposed end plates: an end plate A (1) and an end plate B (2); b. n sets of sleeve bolt assemblies (3); and so on. The invention has simple structure, convenient processing and reliable connection, does not damage the appearance effect of the box-shaped section bar and keeps higher sealing property; the method is not developed aiming at specific nodes, has wide design range of the rotational rigidity of the connecting surface, can be used for connecting various nodes and rod piece midspans, corners or turning positions, and has higher universality; the material is saved, the processing is simple, the production cost is lower, and the popularization and the application are convenient.

Description

A Universal Assembled Connection System for Two-way Curved Box Section Rods

technical field

The present invention relates to related structural fields such as civil engineering, power transmission and transformation engineering, storage shelves and shipbuilding, which use box-shaped cross-section rods as load-bearing rods, and particularly relates to the connection technology between box-shaped cross-section members in civil engineering steel structures .

Background technique

Box-section rod is a general term for all kinds of thin-walled square tubes, rectangular tubes or welded box-section rods made by cold-bending, hot-rolling or welding processes, and has extremely excellent cross-sectional properties. From the perspective of mechanical properties, it has better one-way bending stiffness than the ring section, and has better axial torsional stiffness and weak axis bending stiffness than the I-shaped, groove-shaped, and Z-shaped open sections; In terms of appearance, it has less one-way line-of-sight obstruction than the ring section, and is cleaner than the open section; in terms of weather resistance, it has the same airtightness as the ring section, which is convenient for surface anti-corrosion treatment and dirt cleaning. For bidirectional bending rods, the section aspect ratio can be adjusted with the corresponding bending moment ratio, the material utilization rate is higher, and the bearing capacity and overall stability are better. It is widely used in high-rise steel frames, large-span space reticulated shells, ultra-high transmission towers, storage shelves and bridges, and its materials are mostly low-carbon steel, low-alloy steel or aluminum alloy.

Although the performance of box-section rods is excellent, the development of joint or connection technology is relatively lagging behind, mainly relying on welding, which seriously restricts its popularization, application and assembly development. There are few existing prefabricated connection technologies for two-way curved box-section members, and most of them are accompanied by the development of nodes. The common forms mainly include overhanging end plate (similar to outer flange) connection, box wall opening flush end plate connection, through bolt sleeve connection and external reinforced connection, etc. The flush end plate connection with box wall openings is used to install built-in bolts through the box wall openings, which is not suitable for small cross-section rods, and the openings will lead to local stress concentration, weakening the bearing capacity and self-sealing of the rods; the extension end plate connection Significantly change the appearance profile of the bar; the through-bolt sleeve connection and the external reinforcement connection have a certain influence on the appearance and section strength of the bar.

To sum up, the defects of the existing prefabricated connection technologies are that they all destroy or weaken the inherent performance advantages of box-section members to varying degrees, and the versatility is insufficient, and some technologies are not economical.

Contents of the invention

Aiming at the development status of the assembly connection technology of box-section rods, the present invention provides a general-purpose assembly connection system for two-way curved box-section rods, which not only maintains the appearance effect of box-section rods (no need for rod appearance Contour destruction) and weather resistance advantages, avoiding the opening of the box wall of the rod, and can also provide a higher biaxial bending resistance and axial torsional bearing capacity of the section. By rationally designing parameters such as the diameter and number of high-strength bolts and the thickness of the end plate, the connection system of the present invention can also realize a wide range of connection stiffness adjustment. More importantly, the present invention has significant advantages such as fewer components in the connection system, simple processing technology, strong error tolerance, low manufacturing cost, greatly enhanced versatility, and wide promotion.

The present invention adopts the following technical solutions to realize.

A universal assembled connection system for two-way curved box-section rods, the system includes: a, a pair of symmetrically arranged end plates: end plate A, end plate B; b, N sets of sleeve bolt assemblies;

Among them, the structure of the end plate is that one side of the end plate is a contact joint surface, and the other side is a rod end fixing surface fixedly connected with a box-shaped section rod end, and a contact pressure-bearing flange is arranged along the outer peripheral edge of the contact joint surface. There are N bolt holes evenly distributed on the area between the outer edges of the plates, that is, there are bolt holes A on the end plate A, and bolt holes B on the end plate B; the corresponding end plates A and B After the contact joint surfaces are aligned and contacted, the relative notches on the contact pressure flanges of end plate A and end plate B merge to form M installation operation holes;

Each sleeve bolt assembly includes a bolt shank, an external hexagon socket, 2 pins and a ring gasket; the smooth section in the middle of the bolt shank is provided with a pair of chute that is symmetrical about the axis, and the width of the chute is the same as that of the pin. The diameters match; the outer hexagonal sleeve is a regular hexagonal prism that is evacuated in the middle. There is a threaded hole penetrating the pin in the middle of the surface, and the diameter of the threaded hole of the pin is matched with the pin; the diameter of the inner hole of the ring gasket matches the diameter of the bolt shank, and the ring gasket is set between the nut of the bolt shank and the end plate A, and the bolt The threaded section of the rod is screwed into the bolt hole B provided on the end plate B.

The present invention also includes M groups of cover plate assemblies, each set of cover plate assemblies includes a cover plate for closing the fixed installation operation hole.

In the present invention, a middle hole is opened in the area without bolt holes in the middle of the end plate, and a contact pressure-bearing flange is arranged on the edge of the middle hole.

In the present invention, an end plate stiffening rib is added between the bolt holes on the contact joint surface of the end plate.

In the present invention, a locally thickened frustum is added around the bolt hole on the rod end fixing surface of the end plate B.

The packaging structure of the cover plate of the present invention is that oblique angles are left at the four corners of the installation operation hole, and oblique threaded holes are arranged on the oblique angles; the cover plate assembly also includes countersunk cover plate fixing screws; the corners provided at the four corners of the cover plate Bolt holes at the bottom; countersunk head cover plate fixing screws pass through the corner bolt holes and oblique threaded holes in order to close and fix the cover plate.

The packaging structure of the cover plate of the present invention can also be that a fixed lug plate is arranged inside the edge of the installation operation hole, and a threaded hole of the lug plate is arranged on the fixed lug plate; the cover plate assembly also includes a countersunk cover plate fixing screw; the edge of the cover plate Corresponding cover plate bolt holes are provided; countersunk head cover plate fixing screws pass through the cover plate bolt holes and ear plate threaded holes in order to close and fix the cover plate.

The packaging structure of the cover plate of the present invention can also be that a fixed lug plate is arranged around the cover plate, and a cover plate bolt hole is provided on the fixed lug plate; corresponding flange threaded holes are provided on the contact pressure flange side of the end plate The cover plate assembly also includes countersunk cover plate fixing screws; the countersunk head cover plate fixing screws pass through the ear plate bolt holes and flange threaded holes in order to close and fix the cover plate.

A method for assembling a general-purpose prefabricated connection system for two-way curved box-section rods, the steps of which are as follows:

1) Before the end plate A is welded to the rod end, take the bolt rod and pass through a ring gasket and the corresponding hole on the end plate A in turn, so that the chute on the bolt rod is located on the contact pressure flange on the end plate A On the same side, while the ring gasket is on the other side; Then, put the outer hexagonal sleeve from the threaded end of the bolt rod to the position of the chute, turn the outer hexagonal sleeve to make the upper threaded hole in the same direction as the above chute, and use the pin Screw it in from the threaded hole on the hexagon sleeve and extend into the slide groove on the bolt rod to limit the coaxial relative rotation between the hexagon sleeve and the bolt rod;

2) Connect and fix the rod end fixing surfaces of the end plate A and end plate B (with the sleeve bolt assembly installed) to the corresponding box section rod ends respectively in the factory, and transport them to the installation site as a whole;

3) When the end plate A is connected to the end plate B, the position of the corresponding rod end should be adjusted first to ensure that the two end plates are aligned with each other, then slide the outer hexagonal sleeve to the appropriate position, and manually screw the bolt rod into the end plate A part of the corresponding threaded hole on B; then, use a wrench to screw the hexagon socket to drive the bolt rod to rotate until the set torque is reached;

4) Then take out the wrench from the installation operation hole, install the cover plate assembly, and complete the fixed connection of the two sections of box-section rods.

Compared with the existing connection technology, the beneficial effect of the present invention is that the general assembled connection system for the two-way curved box-section rod disclosed by the present invention rationally arranges the installation and operation holes between the connecting end plates, without weakening the bearing capacity of the rod itself. Capacity; Through the joint work of the sleeve bolt assembly and the contact pressure flange, the connection system has high bidirectional bending stiffness and load capacity; the contact friction between the contact pressure flanges and the anti-skid of the cover plate The transfer effect also endows the connection system with high cross-section shear and torsional bearing capacity; the connection system is not only simple in structure, convenient in processing and reliable in connection, but also does not damage the appearance of box-section rods, maintaining high Sealing; not developed for specific nodes, the design range of the rotational stiffness of the connecting surface is wide, and can be used for connection of various nodes, mid-spans, bends or turnings of the rods, with high versatility; less material, simple processing, and lower production costs Low, easy to popularize and apply.

Description of drawings

Fig. 1 is a schematic diagram of a 16-bolt assembled connection structure in the universal connection system of the present invention (the upper part is a schematic diagram of the disassembled structure of its components; the lower part is a schematic diagram of the assembled structure).

Fig. 2 is a three-dimensional schematic diagram of the detailed structure of a pair of 16-bolt end plates in the universal prefabricated connection system of the present invention (Fig. 2a and Fig. 2b are structural schematic diagrams from two different perspectives).

Fig. 3 is a three-dimensional schematic diagram of the detailed structure of a pair of 8-bolt end plates in the universal prefabricated connection system of the present invention (Fig. 3a and Fig. 3b are structural schematic diagrams from two different perspectives).

Fig. 4 is a three-dimensional schematic diagram of the detailed structure of a pair of 4-bolt end plates in the universal prefabricated connection system of the present invention (Fig. 4a and Fig. 4b are structural schematic diagrams from two different perspectives).

Fig. 5 is a schematic diagram of the connection structure of a typical sleeve bolt assembly in the universal assembly connection system of the present invention (the upper part is a schematic diagram of the overall structure after assembly; the lower part is a schematic diagram of the disassembled parts).

Fig. 6 is a three-dimensional schematic view of the installation of the operation hole cover assembly and the disassembly of parts in the universal prefabricated connection system of the present invention.

Fig. 7 is a schematic diagram of a 4-bolt assembled connection structure in the universal connection system of the present invention (the upper part is a schematic diagram of the disassembled structure of its components; the lower part is a schematic diagram of the assembled structure).

Fig. 8 is a schematic diagram of a 6-bolt assembled connection structure in the universal connection system of the present invention (the upper part is a schematic diagram of the disassembled structure of its components; the lower part is a schematic diagram of the assembled structure).

Fig. 9 is a schematic diagram of an 8-bolt assembled connection structure in the universal connection system of the present invention (the upper part is a schematic diagram of the disassembled structure of its components; the lower part is a schematic diagram of the assembled structure).

Fig. 10 is a three-dimensional schematic diagram of a preferred embodiment of the universal prefabricated connection system of the present invention for two kinds of box-section prefabricated frame structures (wherein Fig. 10a is a structural effect diagram in which the structure of the present invention is that the beam connection is arranged in the middle of the span; Fig. 10b is the structural effect diagram of the structure of the present invention that the beam connection is arranged at a certain distance away from the beam end).

Fig. 11 is a schematic perspective view of an embodiment of the universal prefabricated connection system of the present invention used in the connection between the bridge deck girder and the bridge pier in a T-shaped rigid frame bridge.

Fig. 12 is a schematic perspective view of an embodiment of the universal prefabricated connection system of the present invention used for the connection between segmented arch ribs of an arch bridge.

The marks of the components in the drawings are as follows: 1. End plate A; 2. End plate B; 3. Sleeve bolt assembly; 4. Cover plate assembly; 5. Contact joint surface; 6. Rod end fixing surface; 7. , Box-section rod end; 8. Contact pressure flange; 9. Rod end fixing flange; 10. Installation and operation hole; 11. Bolt hole A; 12. Bolt hole B; 13. Bolt rod; 14. Hexagonal sleeve 15, pin; 16, ring gasket; 17, cover plate; 18, cover plate fixing screw; 19, end plate stiffener; 20, partially thickened cone; 21, middle hole; 22, chute.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

A universal assembled connection system for two-way curved box-section rods, the system includes: a, a pair of symmetrically arranged end plates: end plate A1, end plate B2; b, N sets of sleeve bolt assemblies 3; wherein, The structure of the end plate is that one side of the end plate is the contact joint surface 5, and the other side is the rod end fixing surface 6 fixedly connected with the box-section rod end 7, as shown in Figures 3 and 4. A contact pressure bearing flange 8 is arranged along the outer peripheral edge of the contact joint surface 5; on the rod end fixing surface 6, a rod end fixing flange 9 is arranged as needed near the periphery, as shown in Fig. 1 to 4 . N bolt holes are evenly distributed in the area between the outer edges of the end plates, that is, N bolt holes A11 are arranged on the end plate A1, and N bolt holes B12 are arranged on the end plate B2. After the contact joint surfaces 5 of the corresponding end plates A 1 and B 2 are aligned and contacted, the relative notches on the contact pressure flanges 8 of the end plates A 1 and B 2 are merged to form M installation and operation holes 10.

The structure of each sleeve bolt assembly 3 is to include 1 bolt shank 13, 1 outer hexagon socket 14, 2 pins 15 and 1 annular gasket 16; the smooth section in the middle of the bolt shank 13 is provided with a pair of symmetrical The chute 22, the width of the chute 22 matches the diameter of the pin 15; the outer hexagonal sleeve 14 is a regular hexagonal prism whose middle part is evacuated, the outer hexagonal prism surface is coaxial with the inner cylindrical cavity, the inner wall is smooth, and the outer hexagonal prism bottom surface The size refers to the outline size of the standard hex nut, which is set on the bolt shank 13; in the middle of a set of opposite outer cylinders of the outer hexagon sleeve 14, there is a threaded hole for penetrating the pin, and the diameter of the threaded hole of the pin is matched with the pin 15; the bolt shank The threaded section of 13 is screwed into the bolt hole B 12 provided on the end plate B 2, during installation and construction, the construction torque of the high-strength bolt rod 13 can be controlled by cutting off the pin 15.

The bolt hole A 11 on the end plate A 1 is a non-threaded smooth hole wall, as shown in Figures 2 to 4, the hole diameter is 6mm-16mm larger than the diameter of the bolt rod 13; the bolt hole B 12 on the end plate B 2 is a threaded hole, the hole diameter It is matched with the screw thread and the bolt rod 13 to form a reliable fastening connection.

As shown in Figure 5; there is a gap (such as 6mm ~ 16mm) between the bolt hole A 11 on the end plate A 1 and the high-strength bolt rod 13 to improve the error tolerance of this connection system, and to ensure that the compressive stress can be uniform and effective Therefore, a movable annular gasket 16 is added between the round nut of the high-strength bolt rod 13 and the rod-end fixing surface 6 of the end plate A1, and its thickness is not less than the difference between the diameter of the bolt hole A11 and the high-strength bolt rod 13 .

The present invention also includes M groups of cover plate assemblies 4, and each set of cover plate assemblies 4 includes a cover plate 17 for closing and fixing the installation operation hole 10, and improving the shear and torsional bearing capacity of the connecting surface.

N and M are natural numbers, and M may not be less than 2.

As shown in Figures 2, 3 and 4, the end plate is cast or forged from a metal whose strength is not lower than that of the base metal of the bar, and then machined to form a common blank.

For a larger end plate with a short side length of more than 350mm, as shown in Figure 2, a middle hole 21 can be left in the middle without bolts to reduce weight, and the edge of the middle hole 21 is provided with a contact pressure flange 8; For small end plates with a side length of less than 350mm, the necessity of opening holes in the middle is reduced.

As shown in Figures 1, 7 to 9, the shape of the installation operation hole 10 can be rounded rectangle, oblong or ellipse. The installation operation hole 10 is set so as to realize the torque construction of all the sleeve bolt assemblies 3, and the size and quantity of the installation operation hole 10 should be reduced as far as possible, and the installation operation hole 10 should be arranged on the contact pressure flange 8 with a small normal stress section.

The thickness of the cover plate 17 is designed according to the shear bearing requirements, and the outline, size and quantity should correspond to the installation operation hole 10, so as to ensure that the cover plate 17 can be conveniently embedded in the installation operation hole 10 with a tight gap, and the countersunk cover plate is used to fix the screws 18 fixed.

The packaging structure of the cover plate 17 of the present invention is to leave oblique angles (thickness not less than 2mm) at the four corners of the installation operation hole 10, and beveled threaded holes are provided on the oblique angles; the cover plate assembly 4 also includes a countersunk cover plate for fixing Screw 18; the corner bolt hole that cover plate 17 four corners are provided with;

The packaging structure of the cover plate 17 of the present invention can also be that a fixed lug plate is arranged inside the edge of the installation operation hole 10, and a threaded hole of the lug plate is arranged on the fixed lug plate; the cover plate assembly 4 also includes a countersunk cover plate fixing screw 18 The edge of the cover plate 17 is provided with corresponding cover plate bolt holes; the countersunk cover plate fixing screws 18 pass through the cover plate bolt holes and ear plate threaded holes in order to close and fix the cover plate 17. That is to say, the technical feature of this paragraph is that the fixed ear plate is arranged inside the edge of the installation operation hole 10, and finally the closed and fixed cover plate 17 is realized.

The packaging structure of the cover plate 17 of the present invention can also be that a fixed ear plate is arranged around the cover plate 17, and a cover plate bolt hole is arranged on the fixed ear plate; a corresponding flange is provided on the side of the contact pressure flange of the end plate Threaded holes; the cover plate assembly 4 also includes countersunk cover plate fixing screws 18 ; That is to say, the technical feature of this paragraph is that a fixed lug plate is arranged outside the edge of the installation operation hole 10, and finally the closed fixed cover plate 17 is realized.

The design scheme of installing the operation hole, the cover plate assembly 4 and adding a bevel can be used as a preferred solution, and it does not limit the protection scope of the main body of the present invention. Others are equivalent transformations for the purpose of closing the installation operation hole or improving the shear bearing capacity of the connection Schemes, such as changing the shape of the cover plate and the corresponding installation operation hole, adding a fixed lug plate, etc., can have a variety of means, all of which are within the protection scope of this patent.

It is not necessary to install the operation hole and the cover plate assembly 4. For a few cases where the appearance and weather resistance requirements are low and the shear force of the connecting surface is small, the installation operation hole, the cover plate assembly 4 and the corresponding fixing construction measures can be combined. Cancel.

The thickness of the above-mentioned contact pressure-bearing flange 8 should be determined according to the local pressure-bearing strength of the contact surface, and the pressure-bearing contact surface should be treated as the ordinary pressure-bearing high-strength bolt connection contact surface, planed and kept clean.

The above-mentioned rod end fixing flange 9, when the end plate and the box-section rod end 7 are connected by welding, functions as an arc supporting plate; when the end plate and the rod end 7 are fastened and connected by screws, it functions as an inner connecting plate ; When the end plate and the box-section rod end 7 are connected by self-tapping nails or nails, its function is a connecting plate, so the section size of the rod end fixing flange 9 should be designed according to the corresponding connection method.

The thickness of the above-mentioned end plate A 1 and end plate B 2, the number, diameter and spacing of the bolt rods 13 should be designed according to the overall rotational stiffness, deformation and limit requirements of the bearing capacity of the joint surface; the bolt hole A 11 and the bolt hole B 12 The quantity and arrangement should also take into account the internal force characteristics to be transmitted.

In order to reduce the thickness of the end plate A1 and the end plate B2, or to improve the overall rotational stiffness of the connection, an end plate stiffener 19 can be added between the bolt holes on the contact joint surface 5 of the end plate A1 and the end plate B2 , as shown in Figures 4a and 4b, to reduce the deformation of the end plate under the high-strength bolt tension.

In addition, when the thickness of the end plate B2 is less than the minimum length of the engaging thread required for the bolt rod 13 to bear the maximum axial tension, in order to avoid the occurrence of stripping between the bolt rod 13 and the bolt hole B12 due to the too short engaging thread, the A locally thickened cone 20 is added around the bolt hole on the rod end fixing surface 6 of the end plate B 2, as shown in Figure 3b, to ensure the length of the engaging thread.

In order to ensure the overall appearance of the bar, when the end plate A 1 and the end plate B 2 are perpendicular to the axis of the bar, as shown in Figures 7 to 9, their outer contour shape and size are consistent with the cross-section of the connected bar; the end plate If A 1 and end plate B 2 are oblique to the axis of the connected rod, the shape and size of the outer contour are consistent with the corresponding oblique section of the connected rod.

For the two-way bending stress member bolts are often arranged along the inner side of the section box wall, the number N of sets of sleeve bolt assemblies 3 is an even number, such as 4, 6, 8, 10...; the number of sets M of cover plate assembly 4, That is, the number of installation and operation holes 10 is often an even number due to changes in the number and arrangement of bolts and considering the symmetry of the section. Therefore, the values of N and M will change as the cross-sectional size of the component increases. Under the condition of meeting the structural performance requirements, the bolt diameter and arrangement should be adjusted to optimize the arrangement of the installation operation hole 10 and reduce the total length of the hole.

A method for assembling a general-purpose prefabricated connection system for two-way curved box-section rods, the steps of which are as follows:

1) Before the end plate A 1 is welded to the rod end, take the bolt rod 13 and pass through a ring gasket 16 and the corresponding hole on the end plate A 1 in turn, so that the chute 22 on the bolt rod 13 is located on the end plate A 1 On the same side as the contact pressure flange 8 on the top, and the ring gasket 16 is on the other side; then, put the outer hexagonal sleeve 14 from the threaded end of the bolt rod 13 to the position of the chute 22, and turn the outer hexagonal sleeve 14 to make The threaded hole on it is in the same position as the above-mentioned chute 22, and the pin 15 is screwed in from the threaded hole on the outer hexagonal sleeve 14, and extends into the chute 22 on the bolt shank 13 to limit the outer hexagonal sleeve 14 and the bolt shank. The coaxial relative rotation between 13;

2) Connect and fix the rod end fixing surface 6 of the end plate A 1 and the end plate B 2 of the installed sleeve bolt assembly 3 to the corresponding box section rod end 7 in the factory, and transport them to the installation site as a whole;

3) When the end plate A 1 is connected to the end plate B 2, the position of the corresponding rod end should be adjusted first to ensure that the two end plates are aligned with each other, then slide the outer hexagonal sleeve 14 to the appropriate position, and manually turn the bolt rod 13 Screw into a part of the corresponding threaded hole on the end plate B2; then, use a wrench to screw the outer hexagonal sleeve 14 to drive the bolt rod 13 to rotate until the set torque is reached;

4) Then take out the wrench from the installation operation hole 10, install the cover plate assembly 4, and complete the fixed connection of the two sections of box-section rods.

Instructions for use of the present invention under different working conditions.

Please refer to FIG. 10 , the first embodiment of the present invention is a box-section prefabricated frame based on the general prefabricated connection technology of the present invention. The box section is also the preferred section form in the frame structure, but due to the constraints of the prefabricated connection technology, the existing prefabricated frames often use H-shaped or I-shaped sections. By applying the universal assembled connection technology of the present invention, the above constraints can be overcome at a relatively economical cost, and a universal box-section assembled frame system can be formed. As shown in Figure 10, the general assembly connection system of the present invention is installed near the inflection point of the box-section frame column, and the connection end plate is designed according to the internal force characteristics of the column, which can realize the structural performance of a welded integral column. In order to facilitate the installation and construction, the end plate A 1 is connected to the lower end of the upper column section, and the end plate B 2 is fixed to the upper end of the lower column section. Similarly, segmental assembly can also be realized by applying the connection technology of the present invention to frame beams. There are usually two forms according to the position of the connecting surface on the beam: 1) the first type is shown in Figure 10a, and the universal connecting system of the present invention is set in the span of the frame beam. Only one set of connection system needs to be set in the mid-span of each frame beam. The end plate A 1 and the end plate B 2 are interchangeable, and it is only necessary to ensure that each connection surface is matched. This prefabricated frame system has fewer connecting surfaces, fast installation, and high overall rigidity, but has higher requirements for component transportation, similar to common prefabricated frame systems. 2) The second type is shown in Fig. 10b, which is different from the former. A set of connecting systems of the present invention are installed at both ends of the beam, and the connecting surface is adjusted a small distance from the end of the beam to the middle. Each frame beam is divided into three sections, including a long middle beam body and small short beams separated at both ends. One end of the small short beam is welded with the frame column at equal strength, and the other end is fixed with an end plate B2; while both ends of the middle beam are matched with an end plate A1. The beam section welded on this type of frame column is relatively short, which is convenient for transportation and hoisting; moreover, a "specified plastic hinge" can be formed by rationally designing the rotational stiffness and ultimate bending moment of the connection system, which is similar to the dog-bone frame beam and has more Good static properties and seismic energy dissipation performance. In practical applications, starting from the overall structural performance, rationally adjusting the position and mechanical properties of the prefabricated connection system can design a prefabricated frame system with excellent structural performance and cost-effectiveness. This embodiment is particularly suitable for structures such as various multi-high-rise steel structure buildings, ultra-high transmission towers and storage racks.

Please refer to Figs. 11 and 12, the second embodiment of the present invention: the universal prefabricated connection system of the present invention is used to realize the prefabricated box-section continuous rigid frame bridge and arch bridge. Arch ribs of arch bridges, deck girders and piers of continuous rigid frame bridges often need to bear large two-way bending moments, so box-section members are the most ideal choice. In existing continuous rigid frame bridges, for components with large cross-sections, the box wall is often opened, and construction personnel enter the box room for installation and construction; for components with small cross-sections, the box-shaped cross-section is often abandoned due to the limitation of connection technology. By applying the universal assembled connection technology of the present invention, the assembly of box-shaped cross-section components can be conveniently realized without opening holes in the box wall, and the above-mentioned problems can be solved. As shown in Figure 11, it is a T-shaped rigid structure with a box-shaped cross section. The general assembly connection system of the present invention can be installed in the section with a small bending moment, and the continuous T-shaped rigid structure can be decomposed into smaller segments, which is convenient for factory production and Quick installation; similarly, as shown in Figure 12, by rationally arranging and designing the connecting surface, the technology of the present invention can also be used to divide the long and curved arch rib, which is convenient for industrial production and quick installation, and at the same time, there is no need to worry about the appearance and mechanical properties pay a higher price. When the arch rib, bridge deck and pier cross-section of the bridge increase in size, the cross-section can always be decomposed into a combination of a plurality of small-sized chambers, or a large special-purpose end plate can be designed according to the assembled connection concept of the present invention. Of course, the fabricated connection technology of the present invention can also be used in bridges of other structural types such as simply supported girder bridges, continuous girder bridges, cable-stayed bridges or basket arch bridges.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or approximate transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

It should be noted that in this article, relational terms such as "A" and "B" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "a pair of ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or realize the technical features of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A universal assembled connection system for bidirectional curved box section bars, characterized in that the system comprises: a, a pair of symmetrically arranged end plates: end plate A (1), end plate B (2); b , N group sleeve bolt assembly (3); c, M group cover plate assembly (4); Among them, the structure of the end plate is that one side of the end plate is the contact joint surface (5), and the other side is the rod end fixing surface (6) fixedly connected with the box-section rod end (7). The outer peripheral edge is provided with a contact pressure flange (8), and N bolt holes are uniformly arranged on the area between the outer edges of the end plates, that is, the end plate A (1) is provided with bolt holes A (11), Bolt holes B (12) are provided on the end plate B (2); after aligning and contacting the contact joint surfaces (5) of the corresponding end plate A (1) and end plate B (2), the end plate A (1 ) and the relative notches on the contact pressure flange (8) of the end plate B (2) merge to form M installation operation holes (10); Each set of sleeve bolt assembly (3) includes 1 bolt shank (13), 1 outer hexagon socket (14), 2 pins (15) and 1 ring gasket (16); the bolt shank (13) The smooth section in the middle is provided with a pair of chute (22) which is symmetrical about the axis, and the width of the chute (22) matches the diameter of the pin (15); The surface is coaxial with the inner cylindrical cavity, the inner wall is smooth, and is sleeved on the bolt rod (13); in the middle of a group of opposite outer cylindrical surfaces of the outer hexagonal sleeve (14), there are threaded holes for penetrating pins, and the pin threaded holes The diameter of the hole matches the pin (15); the diameter of the inner hole of the annular gasket (16) matches the diameter of the bolt shank (13), and the annular gasket (16) is arranged on the nut of the bolt shank (13) and the end plate A (1) Between, the threaded section of the bolt rod (13) is screwed into the bolt hole B (12) provided on the end plate B (2); Each set of cover plate assemblies (4) includes a cover plate (17), which is used to close the fixed installation operation hole (10). 2. A general-purpose assembly connection system for two-way curved box-section rods according to claim 1, characterized in that a middle hole (21) is provided in the middle of the end plate without bolt holes, and the edge of the middle hole (21) is provided with Contact pressure flange (8). 3. The universal assembled connection system for a bidirectionally curved box-section bar according to claim 1, wherein an end plate stiffener ( 19). 4. A general-purpose assembly connection system for two-way curved box-section rods according to claim 1 or 2, characterized in that, around the bolt holes on the rod end fixing surface (6) of the end plate B (2), additional Partially thickened frustum (20). 5. A universal assembled connection system for two-way curved box-section rods according to claim 3, characterized in that a local thickening is added around the bolt holes on the rod end fixing surface (6) of the end plate B (2) Frustum (20). 6. A general-purpose assembly connection system for two-way curved box-section rods according to claim 1, characterized in that the packaging structure of the cover plate (17) is such that oblique angles are left at the four corners of the installation operation hole (10) , the oblique angles are provided with oblique threaded holes; the cover plate assembly (4) also includes countersunk cover plate fixing screws (18); the corner bolt holes provided at the four corners of the cover plate (17); the countersunk head cover plate fixing screws (18) pass through the corner bolt hole and the oblique threaded hole successively to close and fix the cover plate (17). 7. A universal assembly connection system for two-way curved box-section rods according to claim 1, characterized in that the packaging structure of the cover plate (17) is that a fixing ear is arranged inside the edge of the installation operation hole (10) There are threaded holes on the ear plate on the fixed ear plate; the cover plate assembly (4) also includes countersunk head cover plate fixing screws (18); the edge of the cover plate (17) is provided with corresponding cover plate bolt holes; the countersunk head cover plate Fixing screw (18) passes cover plate bolt hole, lug plate threaded hole successively, to seal and fix cover plate (17). 8. A universal assembled connection system for two-way curved box-section rods according to claim 1, characterized in that the packaging structure of the cover plate (17) is that a fixed ear plate is arranged around the cover plate (17), Cover plate bolt holes are provided on the fixed lug plate; corresponding flange threaded holes are provided on the side of the contact pressure flange of the end plate; the cover plate assembly (4) also includes countersunk head cover plate fixing screws (18); Head cover plate fixing screw (18) passes ear plate bolt hole, flange threaded hole successively, to seal and fix cover plate (17). 9. A method for assembling a universal prefabricated connection system for two-way curved box-section rods as claimed in claim 1, characterized in that the steps of the method are: 1) Before the end plate A(1) is welded to the rod end, take the bolt rod (13) and pass through a ring gasket (16) and the corresponding hole on the end plate A(1) in turn, so that the bolt rod (13) The chute (22) on the end plate A (1) is located on the same side as the contact pressure flange (8), while the ring gasket (16) is located on the other side; then, from the threaded end of the bolt rod (13) Put the outer hexagonal sleeve (14) to the position of the chute (22), turn the outer hexagonal sleeve (14) so that the upper threaded hole is in the same position as the above chute (22), and use the pin (15) from the outer hexagonal sleeve The threaded hole on (14) is screwed in, and stretches into the chute (22) on the bolt shank (13), to limit the coaxial relative rotation between the outer hexagonal sleeve (14) and the bolt shank (13); 2) Connect the rod end fixing surface (6) of the end plate A (1) and end plate B (2) with the sleeve bolt assembly (3) installed to the corresponding box section rod end (7) respectively in the factory Fixed and transported to the installation site as a whole; 3) When the end plate A (1) is connected to the end plate B (2), first adjust the position of the corresponding rod end to ensure that the two end plates are aligned, and then slide the outer hexagonal sleeve (14) to a suitable position. Manually screw the bolt rod (13) into a part of the corresponding threaded hole on the end plate B (2); then, use a wrench to screw the outer hexagon socket (14) to drive the bolt rod (13) to rotate until the set torque is reached ; 4) Then take out the wrench from the installation operation hole (10), install the cover plate assembly (4), and complete the fixed connection of the two sections of box-section rods.

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