Connecting structure of laminated wood member and steel member

Abstract

The utility model discloses a connecting structure of a laminated wood component and a steel component. The connecting structure comprises the laminated wood component, the steel component, a connecting steel plate and a plurality of pairs of steel lining pipes. A steel plate clamping groove is formed in the end part of the laminated wood component; the connecting steel plate is vertically welded to the connecting end face of the steel member and inserted into the steel plate clamping groove, and adhesive layers are arranged between the two side faces of the connecting steel plate and the groove wall faces of the two sides of the steel plate clamping groove. A supporting plate is fixed at the bottom of the connecting steel plate and forms an inverted T-shaped structure with the connecting steel plate; an annular plate is fixed to one end of each steel lining pipe, the steel lining pipes are inserted into bolt holes in the laminated wood component, the annular plates on the steel lining pipes are installed on the two side faces of the end of the laminated wood component through a plurality of self-tapping screws, and an adhesive layer is arranged between the outer wall face of each steel lining pipe and the inner wall face of the corresponding bolt hole. The connecting bolts penetrate through the bolt holes and the connecting holes in the connecting steel plate and then are fastened through the two gaskets and the nuts. The utility model can effectively prevent the connection node of the laminated wood member and the steel member from loosening.

Description

Technical Field

[0001] This utility model relates to a connection structure between glued laminated wood components and steel components. Background Technology

[0002] The connection between glued laminated timber (GLLT) members and steel or other components typically employs a "connecting steel plate + bolt" method to transfer axial and shear forces between the components. This connection method conforms to the relevant requirements of the national standard GB50005 "Standard for Design of Timber Structures". The connecting steel plate 10 is welded to the steel member 1. A steel plate slot 20 is provided at the end of the GLLT member 2 for inserting the connecting steel plate 10. The connecting bolt 3 passes through the GLLT member 2 and the connecting steel plate 10. Tightening the nut 40 achieves a reliable connection between the GLLT member 2 and the steel member 1 (see...). Figure 1a and Figure 1b ).

[0003] In the conventional "connecting steel plate + bolt" connection type, when the glued laminated timber component 2 is subjected to force, the connecting bolt 3 is pressed between the surface of the glued laminated timber component 2. Due to the shrinkage characteristics of wood itself, and the loose texture and high compressibility of wood, even glued laminated timber components that have undergone mechanical grading will gradually undergo compression deformation on the surface of the wood under local pressure.

[0004] The width of the steel plate groove 20 at the end of the glued laminated timber component 2 is generally 1-2 mm larger than the thickness of the connecting steel plate 10 to ensure installation feasibility. The gap between the side wall of this steel plate groove 2 and the connecting steel plate 10 is generally not treated. When the connecting bolts 3 are tightened, the glued laminated timber component 2 is compressed, and the gap is locally compressed and compacted around the bolt holes. Additionally, the surface of the glued laminated timber component 2 under the washer 41 is subjected to transverse grain compression. The transverse grain compressive strength of wood is relatively low, only about 1 / 4 of the parallel grain compressive strength. After the nut 40 is tightened, the surface of the glued laminated timber component 2 under the washer 41 will also gradually undergo compression deformation. Therefore, after the glued laminated timber structure 2 has been used for a period of time, irreversible compression deformation of the wood's load-bearing surface will lead to loosening of the connections. For timber structures that are subjected to long-term vibration, such as timber bridges, the probability of loosening at the joints is even higher, thus affecting the safety of the glued laminated timber structure 2. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a connection structure between glued laminated timber components and steel components, which can effectively prevent the connection nodes between glued laminated timber components and steel components from loosening.

[0006] The purpose of this utility model is achieved as follows: a connection structure between glued laminated timber and steel components, comprising glued laminated timber components, steel components, connecting steel plates, several sets of fasteners, and several pairs of steel liner tubes; wherein,

[0007] The fastener includes a connecting bolt, two washers and a nut;

[0008] A steel plate groove is provided at the end of the glued laminated timber member, leading to the top surface of the end of the glued laminated timber member; the width of the steel plate groove is greater than the thickness of the connecting steel plate, and the depth of the steel plate groove is greater than the length of the connecting steel plate; several pairs of bolt holes leading to the side of the end of the glued laminated timber member are symmetrically provided on the two side walls of the groove; a support plate groove is provided at the lower end of the steel plate groove, which forms an inverted T-shaped groove with the steel plate groove;

[0009] The connecting steel plate is vertically welded to the connecting end face of the steel component and the glued laminated timber component. Several connecting holes are formed on the connecting steel plate, each corresponding to a pair of bolt holes on the glued laminated timber component. A support plate is fixed to the bottom of the connecting steel plate. The width of the support plate is adapted to the width of the support groove on the glued laminated timber component. The support plate and the connecting steel plate form an inverted T-shaped structure. When the connecting steel plate is inserted into the steel plate slot of the glued laminated timber component, the support plate is located within the support groove. Adhesive layers are provided between the two sides of the connecting steel plate and the two side groove walls of the steel plate slot of the glued laminated timber component, corresponding to each other.

[0010] The length of the steel liner is equal to half the thickness H of the end of the glued laminated timber component minus the width L of the steel plate slot; a ring plate is fixed to one end of the steel liner, the outer diameter of which is larger than the outer diameter of the washer in the fastener; several self-tapping screw holes are evenly distributed around the surface of the ring plate on a circle with a diameter larger than that of the washer; several pairs of steel liners are inserted into several pairs of bolt holes on the glued laminated timber component in a one-to-one correspondence, and the ring plates on the several pairs of steel liners are each installed on the two sides of the end of the glued laminated timber component in a one-to-one correspondence by several self-tapping screws; an adhesive layer is provided between the outer wall surface of each steel liner and the inner wall surface of the corresponding bolt hole on the glued laminated timber component;

[0011] The connecting bolts of several sets of fasteners are passed one-to-one through several pairs of bolt holes on the glued laminated timber component and several connecting holes on the connecting steel plate, and then tightened with two washers and nuts.

[0012] In the above-mentioned connection structure between glued laminated timber and steel components, the width of the steel plate groove on the glued laminated timber component is 2mm greater than the thickness of the connecting steel plate, and the depth of the steel plate groove is 5mm greater than the length of the connecting steel plate.

[0013] In the above-mentioned connection structure between glued laminated timber and steel components, the inner diameter of the steel liner is 1 mm larger than the diameter of the connecting bolt, and the wall thickness of the steel liner is 2-3 mm.

[0014] In the above-mentioned connection structure between glued laminated timber and steel components, glue injection holes are opened on the lower part of the corresponding steel plate slots on both sides of the end of the glued laminated timber component.

[0015] The characteristics of the connection structure between the glued laminated timber component and the steel component in this utility model are as follows:

[0016] 1. By bonding steel liner tubes with ring plates into the bolt holes of glued laminated timber components, the compressive force of the connecting bolts on the bolt hole walls and the end sides of the glued laminated timber components can be effectively dispersed, thus preventing the timber from undergoing permanent compression deformation.

[0017] 2. The steel liner tube has a ring plate at one end with an outer diameter larger than the washer, which can effectively disperse the local cross-grooving pressure formed by the nut and washer of the fastener.

[0018] 3. Fix the ring plate of the steel liner to the end side of the glued laminated timber component with self-tapping screws. The bonding between the steel liner and the bolt hole wall on the glued laminated timber component, as well as the bonding between the connecting steel plate and the steel plate groove on the glued laminated timber component, can effectively prevent the wood from shrinking and ensure that the nut and the connecting steel plate do not loosen. Attached Figure Description

[0019] Figure 1a This is a front view of the connection structure between glued laminated timber and steel components in the prior art;

[0020] Figure 1b yes Figure 1a Side view;

[0021] Figure 2 This is a front view of the connection structure between the glued laminated timber component and the steel component of this utility model;

[0022] Figure 3 yes Figure 2 Side view;

[0023] Figure 4 This is a side view of the glued laminated timber component and the steel component of this utility model;

[0024] Figure 5a This is a vertical cross-sectional view of the connecting steel plate in the connection structure between glued laminated timber and steel components of this utility model.

[0025] Figure 5b yes Figure 5a AA direction view;

[0026] Figure 6a This is an axial cross-sectional view of the steel liner in the connection structure between glued laminated timber and steel components of this utility model.

[0027] Figure 6b yes Figure 6a Side view;

[0028] Figure 7a , Figure 7b and Figure 7c The front view, side view, and top view are corresponding to the front view, side view, and top view of step three when making the connection structure between the glued laminated timber component and the steel component of this utility model.

[0029] Figure 8a and Figure 8b This is a structural diagram of step six when making the connection structure between the glued laminated timber component and the steel component of this utility model. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Please see Figures 2 to 5b The connection structure between the glued laminated timber component and the steel component of this utility model includes a glued laminated timber component 2, a steel component 1, a connecting steel plate 10, six sets of fasteners and six pairs of steel liner tubes 4.

[0032] The connecting steel plate 10 is vertically welded to the connecting end face of the steel component 1 and the glued laminated timber component 2; the steel component 1 is a square tube or H-beam.

[0033] A steel plate slot 20 for inserting a connecting steel plate 10 is opened in the middle of the end of the glued laminated timber component 2, which leads to the top surface of the end of the glued laminated timber component 2. The width L of the steel plate slot 20 is greater than the thickness of the connecting steel plate 10, and the depth of the steel plate slot 20 is greater than the length of the connecting steel plate 10. A support plate slot 20A is opened at the lower end of the steel plate slot 20, and the support plate slot 20A and the steel plate slot 20 form an inverted T-shaped slot.

[0034] Six pairs of bolt holes 21 are symmetrically opened on both sides of the groove wall of the steel plate slot 20, leading to the end side of the glued laminated timber component 2; glue injection holes 22 are opened on both sides of the end of the glued laminated timber component 2 corresponding to the lower part of the steel plate slot 20 (see Figure 4 ).

[0035] The connecting steel plate 10 has six connecting holes 11 that correspond one-to-one with the six pairs of bolt holes 21 on the glued laminated timber component 2; a support plate 10A is fixed to the bottom of the connecting steel plate 10, the width of which is adapted to the width of the support groove 20A on the glued laminated timber component 2, and the support plate 10A and the connecting steel plate 10 form an inverted T-shaped structure (see...). Figure 5a and Figure 5b When the connecting steel plate 10 is inserted into the steel plate slot 20 of the glued laminated timber component 2, the support plate 10A is located in the support plate slot 20A of the glued laminated timber component 2; an adhesive layer 5 is provided between the two sides of the connecting steel plate 10 and the two sides of the slot wall of the steel plate slot 20 of the glued laminated timber component 2.

[0036] The fasteners include a connecting bolt 3, two washers 31 and a nut 32.

[0037] A ring plate 40 is fixed to one end of the steel liner 4. The outer diameter of the ring plate 40 is larger than the outer diameter of the washer 31 in the fastener. Four to six automatic screw holes 400 are evenly distributed around the surface of the ring plate 40 on a circle with a diameter larger than that of the washer 31 (see...). Figure 6a and Figure 6b Six pairs of steel liner tubes 4 are inserted into six pairs of bolt holes on the glued laminated timber component 2 in a one-to-one correspondence, and the ring plates 40 on the six pairs of steel liner tubes 4 are each installed on the two sides of the end of the glued laminated timber component 2 in a one-to-one correspondence by 4 to 6 self-tapping screws 41. An adhesive layer 5 is provided between the outer wall surface of each steel liner tube 4 and the inner wall surface of the corresponding bolt hole on the glued laminated timber component 2.

[0038] The six sets of fastener connecting bolts 3 pass through the steel liner 4 in the six pairs of bolt holes 21 on the glued laminated timber component 2 and the six connecting holes 11 on the connecting steel plate 10, and are then tightened with two washers 31 and nuts 32.

[0039] The connection structure between the glued laminated timber component and the steel component of this utility model includes the following steps:

[0040] Step 1: Fabricate steel liner 4; the inner diameter of steel liner 4 is 1mm larger than the bolt diameter, the length of steel liner 4 is 1 / 2 (end width of glued laminated timber component - width L of steel plate groove), and the wall thickness of steel liner 4 is 2-3mm; a ring plate 40 is welded to one end of steel liner 4, and the outer diameter of ring plate 40 can be determined by calculation based on the tightening force of connecting bolt 3 and the cross-grain pressure of glued laminated timber component. 4-6 automatic screw holes are opened on the ring plate;

[0041] Step 2: Process the glued laminated timber component 2. First, make a steel plate groove 20 at the end of the glued laminated timber component 2, which leads to the top surface of the end of the glued laminated timber component 2. The width of the steel plate groove 20 is 2mm larger than the thickness of the connecting steel plate 10, and the depth of the steel plate groove 20 is 5mm larger than the length of the connecting steel plate 10. Then, make six pairs of bolt holes 21 symmetrically on the two sides of the groove wall of the steel plate groove 20, which lead to the side of the end of the glued laminated timber component 2.

[0042] Step 3: Apply a special wood structure adhesive to the outer surface of the steel liner 4 to form an adhesive layer 5. The adhesive can be a phenolic glue or an amino plastic condensation glue, and the material properties should meet the relevant requirements of the national standards "Technical Specification for Glued Laminate Structures" (GBT50708) and "Code for Acceptance of Construction Quality of Timber Structures" (GB50206). Then, install the six pairs of steel liner 4 one by one into the six pairs of bolt holes on the glued laminated timber component 2 (see...). Figure 7a After the adhesive has cured, the six pairs of steel liner tubes 4 and their corresponding ring plates 40 are fixed to the two end faces of the glued laminated timber component 2 using self-tapping screws 41 (see...). Figure 7b and Figure 7c );

[0043] Step 4: Customize the connecting steel plate 10 on the steel component. To facilitate the later injection of glue into the gap between the connecting steel plate 10 and the steel plate slot 10 on the glued laminated timber component 2, an adhesive layer 5 is formed. The connecting steel plate 10 adopts a T-shaped cross section, that is, a support plate 10A is fixed at the bottom of the connecting steel plate 10 to close the lower end of the steel plate slot 10.

[0044] Step 5: Install fasteners. First, insert the connecting steel plate 10 into the steel plate slot 20 of the glued laminated timber component 2. Then, put a washer 31 on the head of each of the six connecting bolts 31. Next, pass the six connecting bolts 3 one by one through the steel liner tube 4 in the six pairs of bolt holes on the glued laminated timber component 2 and the six connecting holes on the connecting steel plate 10. Then, put a washer 31 on the tail of each of the six connecting bolts 3. Finally, install the six nuts 32 one by one on the outside of the tail washer 31 of the six connecting bolts 3 and tighten them initially.

[0045] Step Six: Inject adhesive into the gaps connecting the steel plates. Inject a special wood structure adhesive 50 into the steel plate groove 20 from the top end of the glued laminated timber component 2 (see...). Figure 8a ), until adhesive 50 overflows from the bottom end of the glued timber component 2, forming an adhesive layer 5 between the connecting steel plate 10 and the steel plate groove 20 (see Figure 8b If the end section height of the glued laminated timber component 2 is large, glue injection holes 22 can be added at appropriate positions on both sides of the end of the glued laminated timber component 2 corresponding to the lower part of the steel plate slot 20. The glue can be injected through the glue injection holes 22 to ensure the fullness of the adhesive layer 5 at the lower part of the steel plate slot 20. After the adhesive in the steel plate slot 20 has solidified, tighten all the nuts 32 again.

[0046] This utility model effectively prevents wood shrinkage by using the self-tapping screws 41 on the ring plate 40 of the steel liner 4, the adhesive layer 5 between the steel liner 4 and the bolt hole 21 on the glued laminated timber component 2, and the adhesive layer 5 between the connecting steel plate 10 and the steel plate groove 20 on the glued laminated timber component 2, thus ensuring that the nut 32 and the steel connecting plate 10 do not loosen.

[0047] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A connection structure between a glued laminated timber (GLLT) component and a steel component, comprising a GLLT component, a steel component, a connecting steel plate, and several sets of fasteners; wherein a steel plate slot is formed at the end of the GLLT component, extending to the top surface of the end of the GLLT component; the connecting steel plate is vertically welded to the connection end face of the steel component and the GLLT component, and the connecting steel plate is inserted into the steel plate slot of the GLLT component; the fasteners include connecting bolts, two washers, and a nut; characterized in that, The connection structure also includes several pairs of steel liner pipes; The width of the steel plate slot on the glued laminated timber component is greater than the thickness of the connecting steel plate, and the depth of the steel plate slot is greater than the length of the connecting steel plate; a support plate slot is opened at the lower end of the steel plate slot, which forms an inverted T-shaped slot with the steel plate slot; several pairs of bolt holes leading to the end side of the glued laminated timber component are symmetrically opened on the two side groove walls of the steel plate slot on the glued laminated timber component. The connecting steel plate has several connecting holes that correspond one-to-one with the bolt holes on the glued laminated timber component; a support plate is fixed to the bottom of the connecting steel plate, the width of which is adapted to the width of the support plate groove on the glued laminated timber component, and the support plate and the connecting steel plate form an inverted T-shaped structure; when the connecting steel plate is inserted into the steel plate slot of the glued laminated timber component, the support plate is located in the support plate groove of the glued laminated timber component; an adhesive layer is provided between the two sides of the connecting steel plate and the two side groove walls of the steel plate slot of the glued laminated timber component; The length of the steel liner is equal to half the thickness H of the end of the glued laminated timber component minus the width L of the steel plate slot; a ring plate is fixed to one end of the steel liner, the outer diameter of which is larger than the outer diameter of the washer in the fastener; several self-tapping screw holes are evenly distributed around the surface of the ring plate on a circle with a diameter larger than that of the washer; several pairs of steel liners are inserted into several pairs of bolt holes on the glued laminated timber component in a one-to-one correspondence, and the ring plates on the several pairs of steel liners are each installed on the two sides of the end of the glued laminated timber component in a one-to-one correspondence by several self-tapping screws; an adhesive layer is provided between the outer wall surface of each steel liner and the inner wall surface of the corresponding bolt hole on the glued laminated timber component; The connecting bolts of several sets of fasteners are passed one-to-one through several pairs of bolt holes on the glued laminated timber component and several connecting holes on the connecting steel plate, and then tightened with two washers and nuts.

2. The connection structure between glued laminated timber and steel components according to claim 1, characterized in that, The width of the steel plate groove on the glued laminated timber component is 2mm greater than the thickness of the connecting steel plate, and the depth of the steel plate groove is 5mm greater than the length of the connecting steel plate.

3. The connection structure between glued laminated timber and steel components according to claim 1, characterized in that, The inner diameter of the steel liner is 1 mm larger than the diameter of the connecting bolt, and the wall thickness of the steel liner is 2-3 mm.

4. The connection structure between glued laminated timber and steel components according to claim 1, characterized in that, The glued laminated timber component has glue injection holes on the lower part of the corresponding steel plate slots on both sides of its end face.

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