CN219060341U

CN219060341U - Novel pin reinforced prestress steel splint-bolt joint

Info

Publication number: CN219060341U
Application number: CN202222478681.5U
Authority: CN
Inventors: 李宏敏; 王培琳; 左腾; 王雨桐; 许鑫凯
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-05-23
Anticipated expiration: 2032-09-19

Abstract

The utility model discloses a novel pin reinforced prestress steel splint-bolt joint, which comprises a wood truss, high-strength pins, bolts and steel splints. The steel splints on two sides are clamped at the joint between the lower chord member and the three web members through bolts, the pins are obliquely nailed into two sides of the wood structure bolt at a certain angle with the bolt holes, the pins are self-designed reinforced pins, and the friction engagement of the pins on wood is increased by arranging pointed protrusions on the walls of the pins. Because the bolt hole needs the reserved space, there is the space and leads to the node connection not hard up. The utility model enhances the prestress of the integral node and the pin slot bearing capacity of the bolt, and simultaneously increases the ductility of the component. The pin is adopted, so that the conditions of re-drilling and the like caused by machining errors are avoided; and meanwhile, the texture of the whole texture of the wood surface is not damaged.

Description

Novel pin reinforced prestress steel splint-bolt joint

Technical Field

The utility model relates to a reinforcing structure of a wood truss steel splint-bolt joint in a building wood structure, in particular to a pin reinforcing wood truss steel splint-bolt joint in a wood structure.

Background

Wood is a natural and extremely affinity material, and is considered as the first choice building material for "green building", while modern wood structures are a type of energy-saving, land-saving, ecological and environmental-friendly structure.

The node performance of the wood structure directly influences the structural strength, the service life and the reliability, and meanwhile, the wood has the defects of low tensile strength, easiness in splitting, strength change along with the water content and the like, so that the enhancement of the node is an important link of the building technology of the wood structure building.

At present, the ultimate bearing capacity of the node cannot be fully exerted due to the characteristic that wood is easy to split, and brittle failure is easy to occur. On the premise of not affecting the attractive appearance of the wood structure and not increasing the dead weight, the utility model enhances the prestress of the integral node and the bearing capacity of the pin groove of the bolt, improves the bearing capacity of the integral node and also increases the ductility of the component. The existing research grouting method improves the connection of the bolt and the steel plate, epoxy resin or other viscous materials are filled after the connection of the joints to reinforce the joints, but the grouting method cannot directly check the grouting quality and possibly has the condition of poor consolidation effect, so that a new pin connection is provided, namely, the prestress of the whole joint and the pin slot bearing capacity of the bolt are enhanced by arranging pins on two sides of the bolt.

The pin is adopted, so that the conditions of re-drilling and the like caused by machining errors are avoided; meanwhile, the texture of the whole texture of the wood surface is not damaged, and the compact and close charm of the wood structure is maintained.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a pin reinforced prestress steel splint-bolt joint which is high in strength, high in efficiency, convenient to construct and wide in application range.

The utility model adopts the technical scheme that the pin reinforced prestress steel splint-bolt joint comprises a wood truss and three metal connecting components, wherein a plurality of bolts (1), a plurality of reinforced pins (2) and steel splints (3) with regular shapes on two sides are adopted, and the widths of all branches of the steel splints are matched with the widths of a lower chord member and three web members in the wood truss. The steel clamping plates on the two sides are clamped at the joint between the lower chord member and the three web members through bolts, the pins and the bolt holes are obliquely nailed into the two sides of the wood truss bolts at a certain angle, and the pins are reinforced pins and are made of Q235.

Preferably, the screw diameter of the bolt (1) is 22-24mm, the interval between the bolts is not less than 5 times of the screw diameter of the bolt, the interval between the bolts and the side of the steel clamping plate is not less than 4 times of the screw diameter of the bolt, two rows of bolts are respectively arranged on each branch of the steel clamping plate, and the steel clamping plates on two sides are used for tightly clamping the lower chord member and the three web members in the wood truss through a plurality of bolts.

Preferably, the diameter of the pin (2) is 6-8mm, the interval between the pins is not less than 3 times of the diameter of the pin, the clearance between the inclined pin-in position and the bolt hole is not more than 5 times of the diameter of the bolt, the clearance between the pin and the bolt hole is equal to 3 times of the diameter of the bolt, the length of the pin is equal to 2 times of the height of the transverse wood member in the pin-in direction, and the pin is arranged on two sides of the bolt.

Preferably, the diameter of the bolt hole of the steel clamping plate (3) is 2mm larger than the diameter of the screw rod of the bolt (1), and the diameter of the pin hole is 2mm larger than the diameter of the pin.

Compared with the thread of a screw, the utility model has the advantages that the biting force of the pointed protrusions on the wall of the screw is not easy to tear the wood texture by nailing the pin into the wood, and the prestress is enhanced by nailing the pin, so that the bearing capacity and the ductility of the component are improved.

The utility model has the beneficial effects that:

1. the wood truss steel splint-bolt node is reinforced by the pin, the friction engagement of the wood truss steel splint-bolt node to the wood is increased by arranging the pointed protrusions on the wall of the pin, the prestress of the integral node and the pin groove bearing capacity of the bolt are enhanced, the ductility and the strength of the node can be effectively improved, and a good foundation is laid for popularization and application of the green high-performance wood structure.

2. The wood structure system has the advantages of high bearing capacity, convenience in processing and construction, attractive appearance, no need of assembly and the like, can realize large-scale industrial processing, is quickly assembled on site, has lower transportation and foundation cost, and greatly widens the application range of the wood structure.

Drawings

FIG. 1 is a front view of the overall structure of the present utility model;

FIG. 2 is a partial schematic view of the pin driving angle;

fig. 3 is a schematic structural view of the bolt 1;

fig. 4 is a schematic structural view of the enhanced pin 2;

FIG. 5 is a view of the pin outer wall protrusion owner (unit: mm);

FIG. 6 is a side view (in mm) of a pin outer wall protrusion;

fig. 7 is a schematic structural view of the steel clamping plate 3;

FIG. 8 is a partial schematic view of the structure of the pin and bolt preformed holes in the steel clamping plate 3;

Detailed Description

The utility model is further described below with reference to the drawings and the detailed description.

The first embodiment is as follows: referring to fig. 1 and 3, a novel pin reinforced prestress steel splint-bolt joint according to this embodiment is provided with bolt holes in advance, bolt holes and pin holes in advance on the steel splint, and the positions where the pins are driven in are marked on the upper end of the bearing side of the bolt holes of the wood structure bolt joint, and the net distance between the positions and the bolt holes and the diameter of the pins are set according to the size of the joint, the diameter of the bolt, the mechanical structure and the type of the load to be borne.

The second embodiment is as follows: according to the novel pin reinforced prestress steel splint-bolt joint, as shown in the description of fig. 1 and 4, through comparative experiment research, the net distance between the position where the pin is nailed and the bolt hole is not more than 5 times of the diameter of the bolt, the ideal net distance is equal to zero, the screw diameter of the pin is preferably controlled to be 6-8mm, the distance between the pins is not less than 3 times of the screw diameter of the pin, as shown in the figure, the pin is an reinforced pin, the parameters are strictly controlled in the specific construction process, and the joint is prevented from being damaged or even destroyed in advance.

And a third specific embodiment: with reference to fig. 2 and fig. 4, the novel pin reinforced prestress steel splint-bolt joint according to this embodiment, the pin driving position should be arranged at the side of the bolt joint Kong Chengya for the joint bearing monotonous load, and should be arranged at both sides of the bolt hole for the joint bearing repeated load, so that the prestress of the integral joint and the pin groove bearing capacity of the bolt are enhanced, and other parameters are the same as the monotonous load joint. At the marked position, the pin is polished clean before being nailed and the surface is kept flat, so that the problem that the wood in the wood truss node is seriously deformed along with the time extension to influence the integral structure is solved.

It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model. The components not explicitly described in this embodiment can be implemented by using the prior art.

Claims

1. The utility model provides a novel pin reinforcing prestressing force steel splint-bolt joint, includes three kinds of metal coupling assembling, a plurality of bolts (1), a plurality of enhancement formula pin (2), steel splint (3) of both sides shape rule, its characterized in that steel splint each branch's width all agrees with the width of lower chord member and three web members in the wood truss, respectively installs two rows of bolt holes on each branch, uses the steel splint of both sides to tightly grip lower chord member and three web members in the wood truss through a plurality of bolts, every bolt both sides all incline to peg into equidistant pin, the pin be enhancement formula pin, increase its friction interlock to timber through setting up pointed protrusion at the nail wall, the material is Q235.

2. The novel pin reinforced prestress steel splint-bolt joint as claimed in claim 1, wherein the bolt diameter of the bolt (1) is 22-24mm, the interval between the bolts is not less than 5 times of the bolt diameter, the interval between the bolts and the side of the steel splint is not less than 4 times of the bolt diameter, and two rows of bolts are respectively arranged on each branch of the steel splint.

3. The novel pin reinforced prestress steel splint-bolt joint as claimed in claim 1, characterized in that the diameter of the pin (2) is 6-8mm, the interval between pins is not less than 3 times of the diameter of the pin, the net interval between the inclined nailing position of the pin and the bolt hole is not more than 5 times of the diameter of the bolt, the net interval between the pin and the bolt hole is equal to 3 times of the diameter of the bolt, the length of the pin is equal to 2 times of the height of the transverse wood member in the nailing direction of the pin, and the pin is arranged at two sides of the bolt, so that the prestress of the integral joint and the pin groove bearing capacity of the bolt are enhanced.

4. The novel pin reinforced prestress steel splint-bolt joint as claimed in claim 1, characterized in that the width of each branch of the steel splint (3) is matched with the width of the lower chord member and the three web members in the wood truss, and two rows of bolt holes are respectively arranged on each branch.