CN209891389U

CN209891389U - Self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node

Info

Publication number: CN209891389U
Application number: CN201920305509.5U
Authority: CN
Inventors: 罗云标; 陈跃波; 朱海涛; 林旭川; 李忠献
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-01-03
Anticipated expiration: 2029-03-12

Abstract

The utility model discloses a self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node, proper amount packing ring is respectively placed to the wedge screw of this connected node and the wedge screw of taking the nut, screw up the bolt and exert the process that prestretches the force, it makes the bolt pull along the axial to be produced the packing force between the connecting plate contact surface, the actual diameter that leads to wedge screw and the wedge screw of taking the nut to take place relative slip messenger bolt increases along with it, will reserve finally between bolt hole and the bolt and fill in along the space that is connected the plate and is pulled the direction. After the connected plates are connected, the washers enable the sections weakened by the screw sections to be respectively positioned on the upper side and the lower side of the upper splicing plate and the lower splicing plate, and a connecting node of the self-compaction wedge-shaped split type pressure-bearing high-strength bolt which is free of sliding and suitable for bearing a steel structure connecting component under the reciprocating load action along the tension direction of the connected plates is formed.

Description

Self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node

Technical Field

The utility model belongs to the connection engineering scope of steel construction, in particular to be applied to a self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node of steel construction connection engineering such as industry and civil construction steel construction, bridge, large-scale hoisting machinery.

Background

In steel structures or composite structures, the connection between steel members is generally a welded connection, a riveted connection or a bolted connection.

Although the welding connection has the advantages of simple structure, convenient manufacture and processing, direct connection between welding pieces, no weakening of cross section and material saving, the defects that the local material of steel in the heat affected zone of the welding seam becomes brittle, the welding residual stress and the residual deformation reduce the bearing capacity of the component, the brittle failure is easy to occur at low temperature and the like are prominent.

Compare with welded connection, rivet connection's steel construction, its plasticity and toughness all are better than welded connection, pass power reliably, connect the easy inspection of quality, moreover to the quality requirement of main part metal material than welded structure. However, the rivet connection has the defects of weakened section of the rivet hole, steel and labor consumption for drilling and riveting, high requirement on the technical level of a technician, poor labor condition and the like.

In steel structural connections, rivet connections are nowadays increasingly being replaced by conventional bolt connections. The conventional bolt connection is classified into a general bolt connection and a high-strength bolt connection. In large-scale steel structure connection engineering, the common bolt connection strength can not meet the design requirement, and high-strength bolts are required for connection. The high-strength bolt connection comprises friction type high-strength bolt connection and pressure-bearing type high-strength bolt connection. The friction type high-strength bolt connection only depends on the friction force between the connected plates to transfer shearing force, and the shearing force is equal to the friction force and is taken as the limit state of bearing capacity. The force transmission characteristic of the pressure-bearing high-strength bolt connection is that when the shearing force exceeds the friction force, the connected piece and the plate slide mutually, the screw rod is in contact with the reserved hole wall, and the bolt shearing damage or the steel plate crushing damage is used as the limit state of the bearing capacity. Although the friction type high-strength bolt connection has the advantages of small shearing deformation, high safety reserve and suitability for a structure directly bearing power load, the bearing capacity of the pressure-bearing type high-strength bolt connection is higher than that of the friction type high-strength bolt connection, the pressure-bearing type high-strength bolt connection saves bolts, the treatment of the contact surface of a component at the joint in actual construction is relatively simple and economical, only oil stains and rust on the surface of steel need to be removed, and sand blasting (shot) treatment and other treatment are not needed. However, the pressure-bearing type high-strength bolt connection is only suitable for connection of structures bearing static loads or indirect dynamic loads due to the defect of slippage, and is not suitable for connection of important structures bearing dynamic loads or braking systems.

Disclosure of Invention

An object of the utility model is to overcome prior art's shortcoming, provide one kind not only bear the weight of the dynamic height, do not have to slide, shear deformation is little, and be applicable to and bear along the steel construction adapting unit who is connected the plate and is drawn the reciprocal loading effect of direction, have moreover that the construction process is simpler, construction speed is fast, economic performance is better the connected node of self-compaction wedge amalgamation type pressure-bearing type high strength bolt.

The technical scheme of the utility model as follows:

a connecting joint of a self-compaction wedge-shaped split type pressure-bearing high-strength bolt comprises two splicing plates which are arranged in parallel at opposite intervals, wherein the right end of a left connected plate and the left end of a right connected plate are respectively arranged between the upper splicing plate and the lower splicing plate, left preformed holes are respectively formed in the left ends of the two splicing plates and the right ends of the left connected plates along the same vertical axis, right preformed holes are respectively formed in the right ends of the two splicing plates and the left ends of the right connected plates along the same vertical axis, and the two splicing plates and the two connected plates are respectively fixedly connected with each other through bolts penetrating through the preformed holes on the corresponding sides;

the rod part of the bolt is a cylinder formed by butt joint of a left half rod section and a right half rod section, the butt joint surfaces of the left half rod section and the right half rod section are wedge surfaces, the lower part of the cylinder is a threaded rod section provided with external threads, the threaded rod section is arranged at the bottom of the left half rod section, the nut of the bolt is arranged at the top of the right half rod section, the threaded rod section is connected with a nut, the left and right rod sections of each bolt penetrate through the reserved hole, wedge surfaces between the left and right rod sections are in sliding contact with each other and are arranged in a pressing mode, a plurality of gaskets which are tightly pressed on the top wall of the splicing plate at the upper part are sleeved on a half rod section at the right side between the top wall of the splicing plate at the upper part and a nut of the bolt, and a plurality of gaskets which are tightly pressed and arranged on the bottom wall of the splicing plate below through the nut are sleeved on the half rod section on the left side between the bottom wall of the splicing plate below and the nut.

The utility model discloses have following advantage and outstanding effect for prior art:

compared with welding connection, the connection node of the self-compaction wedge-shaped split type pressure-bearing high-strength bolt avoids the problems that the local material of steel in a heat affected zone of a welding seam becomes brittle, the welding residual stress and the residual deformation reduce the bearing capacity of a component, the brittle failure is easy to occur at low temperature, the welding technical requirement is high and the like in the welding connection.

Compared with rivet connection, the connecting joint of the self-compaction wedge-shaped split type pressure-bearing high-strength bolt avoids the defects of weakened section of a rivet hole, steel and labor cost for hole making and riveting, high requirement on the technical level of a technician, poor labor condition and the like in rivet connection.

Compared with the traditional bolt connection: the bearing capacity of the connecting node of the self-compaction wedge-shaped split type pressure-bearing type high-strength bolt is higher than that of the common bolt connection and the friction type high-strength bolt connection; the connecting joint of the self-compacting wedge-shaped split pressure-bearing type high-strength bolt not only saves the bolt compared with the connection of a friction type high-strength bolt, but also has relatively simple and economic treatment on the contact surface of the components at the connecting part in actual construction, only needs to remove oil stains and rust on the surface of steel products, and does not need to carry out treatment such as sand blasting (shot blasting); the connecting joint of the self-compaction wedge-shaped split type pressure-bearing type high-strength bolt is filled in a gap in the tension direction of the connected plate through the reserved bolt hole and the bolt without sliding, the shearing deformation of the connecting joint is smaller than that of the pressure-bearing type high-strength bolt, and the connecting joint is not only suitable for bearing structures with static loads and indirect dynamic loads, but also suitable for bearing steel structure connecting parts with reciprocating load action in the tension direction of the connected plate.

Drawings

FIG. 1 is a schematic view of a connection node of a self-compacting wedge-shaped split type pressure-bearing type high-strength bolt;

FIG. 2 is a detailed structural view of the connection between the self-compacting wedge-shaped split type pressure-bearing high-strength bolt shown in FIG. 1 and a connected plate and a splicing plate;

fig. 3 is a detailed structural view of the self-compacting wedge-shaped split type pressure-bearing high-strength bolt shown in fig. 1.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

As shown in the attached drawing, the utility model discloses a self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node, including two splice plates 2 that upper and lower parallel relative interval set up, a left right-hand member by connecting plate 1 and a right side left end by connecting plate 1 sets up respectively upper and lower two splice plates 2 between left end and the left right-hand member by connecting plate 1 open respectively along same vertical axis and have left side preformed hole two splice plates 2's right-hand member and the left end by connecting plate 1 on right side open respectively and have right side preformed hole along same vertical axis, two splice plates 2 and two bolts 3 that are connected plate 1 respectively through the preformed hole that passes corresponding side fixed each other.

The rod part of the bolt 3 is a cylinder formed by butt joint of a left half rod section and a right half rod section, the butt joint surfaces of the left half rod section and the right half rod section are wedge surfaces, the lower part of the cylinder is a threaded rod section provided with external threads, the threaded rod section is arranged at the bottom of the left half rod section 6, the nut of the bolt 3 is arranged at the top of the right half rod section 7, the threaded rod section is connected with a nut 4, the left and right half rod sections of each bolt 3 penetrate through the reserved hole, wedge surfaces between the left and right half rod sections are in sliding contact with each other and are arranged in a pressing mode, a plurality of gaskets 5 which are tightly pressed on the top wall of the splicing plate 2 above are sleeved on a half rod section 7 on the right side between the top wall of the splicing plate 2 above and a nut of the bolt 3, a plurality of washers 5 which are tightly pressed on the bottom wall of the splicing plate 2 below through the nut 4 are sleeved on a half rod section 6 on the left side between the bottom wall of the splicing plate 2 below and the nut 4.

During the process of tightening the bolt to apply the pretensioning force, the bolt is pulled in the axial direction while the pressing force is generated between the contact surfaces of the connected plate 1, so that the left half rod segment 6 and the right half rod segment 7 slide relatively, the actual diameter of the bolt is increased, and finally, the gap between the reserved bolt hole and the bolt in the tension direction of the connected plate 1 is filled.

After the connected plates 1 are connected, a plurality of gaskets 5 in proper amount are required to enable the sections of the weakened sections (the actual diameter of which is smaller than the diameter of the bolt) of the bolt 3 to be respectively positioned at the upper side and the lower side of the upper splicing plate and the lower splicing plate.

The above description of the present invention is provided to facilitate understanding and application of the present invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications can be easily made to the present invention and applied to other embodiments without the inventive faculty. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art should understand that modifications and alterations made without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a self-compaction wedge amalgamation formula pressure-bearing type high strength bolt's connected node, includes two splice plates that upper and lower parallel relative interval set up, the left right-hand member of being connected the plate and the left end of being connected the plate on a right side set up respectively between upper and lower two splice plates its characterized in that: the left ends of the two splicing plates and the right ends of the connected plates on the left side are respectively provided with a left reserved hole along the same vertical axis, the right ends of the two splicing plates and the left ends of the connected plates on the right side are respectively provided with a right reserved hole along the same vertical axis, and the two splicing plates and the two connected plates are respectively fixedly connected with each other through bolts penetrating through the reserved holes on the corresponding sides;