A kind of building chord truss beam and installation method thereof

Abstract

The present invention provides a building chord truss beam and an installation method thereof, comprising a U-shaped chord, a plurality of V-shaped struts connected to the middle section of the U-shaped chord, a U-shaped connecting rod connected to both ends of the U-shaped chord, a cable connected to the U-shaped connecting rods at both ends, the middle of the cable sequentially passing through the bottom of the plurality of V-shaped struts, and applying prestress to the chord by tightening the cable. The chord truss beam provided by the present invention can be used for small span structures, has a high degree of standardization of components, is more flexible in connection, has a light structure, is easy to produce and install, and has a low overall cost.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and in particular relates to a building chord-supported truss beam and an installation method thereof. Background Art

[0002] The chord structure is a composite prestressed structure that combines rigidity and flexibility. The essence of the structure is to connect the upper compression and bending members and the lower tension members with struts. By applying prestress on the tension members, the force form of the upper members is improved. The chord structure has clear force, can give full play to the advantages of both rigid and flexible materials, is simple and convenient to transport and construct, and has good application prospects.

[0003] The components of the chord structure in the prior art are generally used for large span structures, rarely for small spans, and the brace rods and the upper chord rods must be rigidly connected, and the standardization of the components is low. Therefore, the present invention intends to design a building chord truss beam and its installation method, which has a high degree of standardization of components, light weight, convenient production and installation, and low comprehensive cost. Summary of the invention

[0004] In view of the problems existing in the prior art, the technical solutions adopted by the present invention to solve the problems existing in the prior art are as follows:

[0005] A building chord truss beam, characterized in that it comprises a U-shaped chord, a plurality of V-shaped struts connected to the middle section of the U-shaped chord, a U-shaped connecting rod connected to both ends of the U-shaped chord, a cable connected to the U-shaped connecting rods at both ends, the middle of the cable sequentially passing through the bottom of the plurality of V-shaped struts, and applying prestress to the chord by tightening the cable;

[0006] The U-shaped chord is a U-shaped structure with an opening downward, including an upper flange plate located at the top and two parallel webs A located on both sides. Bolt holes are provided at the connection between the middle section of the U-shaped chord and the V-shaped strut and at the connection between the two ends and the U-shaped connecting rod, passing through the two parallel webs A, to facilitate connection using fasteners.

[0007] Both ends of the upper flange plate extend outwardly from the flange plate to increase the rigidity and bearing capacity outside the plane of the U-shaped chord.

[0008] The lower ends of the two parallel webs A extend outwardly with flanges to increase the rigidity and bearing capacity outside the plane of the U-shaped chord.

[0009] The number of the V-shaped struts is determined according to the span and load of the chord-supported truss beam. The overall side surface of the V-shaped strut is V-shaped, and the cross-section of the V-shaped strut is U-shaped with an upward opening, including a lower flange plate and a pair of parallel webs B on both sides. The upper end of the web B is provided with a flange B turned inward, and a groove is provided on the lower flange plate of the V-shaped strut. The cable is passed through the groove. Bolt holes are provided on the two parallel webs B of the V-shaped strut at the connection with the U-shaped chord to facilitate the connection with the U-shaped chord through the fastener A.

[0010] The outer edge distance between the two parallel webs B of the V-shaped brace is 0.5-2 mm smaller than the inner edge distance between the two parallel webs A of the U-shaped chord, so as to facilitate installation.

[0011] The cross-section of the U-shaped connecting rod is an upwardly open U-shape, including a lower flange plate and a pair of parallel webs B. The upper end of the web B is provided with a flange B turned inward. Bolt holes are provided on the two parallel webs B of the U-shaped connecting rod at the connection with the U-shaped chord to facilitate the connection with the U-shaped chord through the fastener A. The cable passes through the lower edge flange of the U-shaped connecting rod and is connected to the U-shaped connecting rod through the fastener B.

[0012] The outer edge distance between the two parallel webs B of the U-shaped connecting rod is 0.5-2 mm smaller than the inner edge distance between the two parallel webs A of the U-shaped chord rod to facilitate installation.

[0013] The U-shaped chord, V-shaped support rod, cable, U-shaped connecting rod and fastener A are all made of metal material or composite material.

[0014] A method for installing a building chord truss beam, characterized in that it comprises the following steps:

[0015] Step 1, forming the U-shaped chord and the U-shaped connecting rod by rolling or stretching; forming the V-shaped strut by stamping, or by stretching and bending;

[0016] Step 2: Cut the U-shaped chord and the U-shaped connecting rod according to the design drawings, and drill holes at the designed connection positions of the U-shaped chord, the V-shaped brace and the U-shaped connecting rod;

[0017] Step 3: Place the U-shaped chord on the installation plane, and connect the V-shaped support rod and the U-shaped connecting rod to it through fasteners A respectively;

[0018] Step 4: Pass both ends of the cable through the grooves of the V-shaped support rod and connect to the lower flange plate of the U-shaped connecting rod through fastener B. Apply prestress to the cable by tightening fastener B at one end.

[0019] The present invention has the following advantages:

[0020] The chord-supported truss beam provided by the present invention can be used for small-span structures, has a high degree of standardization of components, is more flexible in connection, has a light structure, is easy to produce and install, and has a low overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the chord-supported truss beam structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the U-shaped chord structure;

[0023] Figure 3It is a schematic diagram of the V-type brace structure;

[0024] Figure 4 It is a schematic diagram of the U-shaped connecting rod structure;

[0025] Figure 5 It is a schematic diagram of the connection structure between the U-shaped chord and the V-shaped strut;

[0026] Figure 6 It is a schematic diagram of the connection structure between the U-shaped chord and the U-shaped connecting rod;

[0027] Figure 7 It is a schematic diagram of the positional relationship between the V-shaped support rod and the cable;

[0028] Among them: 1-chord truss beam, 2-U-shaped chord, 3-V-shaped brace, 4-cable, 5-U-shaped connecting rod, 6-fastener A, 7-upper flange plate, 8-flange plate, 9-web plate A, 10-flange A, 11-flange B, 12-web plate B, 13-groove, 14-lower flange plate, 15-fastener B. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0030] like Figure 1 As shown, a building chord truss beam comprises a U-shaped chord 2, a plurality of V-shaped struts 3 connected to the middle section of the U-shaped chord 2, U-shaped connecting rods 5 connected to both ends of the U-shaped chord 2, and cables 4 connected to the U-shaped connecting rods 5 at both ends. Figure 7 As shown, the middle part of the cable passes through the bottom of several V-shaped struts 3 in sequence, and prestress is applied to the chord by tightening the cable 4;

[0031] like Figure 2 The U-shaped chord 2 shown is a U-shaped structure with an opening facing downward, including an upper flange plate 7 located at the top and two parallel webs A9 located at both sides. Bolt holes are provided at the connection between the middle section of the U-shaped chord 2 and the V-shaped strut 3 and at both ends of the U-shaped connecting rod 5, through the two parallel webs A9, so as to facilitate connection with fasteners 6. The two ends of the upper flange plate 7 extend outwardly with wing plates 8 to increase the rigidity and bearing capacity outside the plane of the U-shaped chord 2. The lower ends of the two parallel webs A9 extend outwardly with flanges 10 to increase the rigidity and bearing capacity outside the plane of the U-shaped chord 2.

[0032] like Figure 3The number of V-shaped braces 3 shown is determined according to the span and load of the chord truss beam. The overall side of the V-shaped brace 3 is V-shaped, and the cross section of the V-shaped brace 3 is U-shaped with an upward opening, including a lower flange plate 14 and a pair of parallel webs B12 on both sides. The upper end of the web A is provided with a flange B11 turned inward, and the lower flange plate 14 of the V-shaped brace 3 is provided with a groove 13, and the cable 4 is inserted into the groove 13. Bolt holes are provided at the connection between the two parallel webs B12 of the V-shaped brace 3 and the U-shaped chord 2, so as to facilitate the connection with the U-shaped chord 2 through the fastener A6.

[0033] The outer distance between the two parallel webs B12 of the V-shaped brace 3 is 0.5-2 mm smaller than the inner distance between the two parallel webs A9 of the U-shaped chord 2 to facilitate installation.

[0034] like Figure 4 The cross section of the U-shaped connecting rod 5 shown is an upwardly open U-shape, including a lower flange plate 14 and a pair of parallel webs B12. The upper end of the web A is provided with a flange B11 turned inward. Bolt holes are provided on the two parallel webs B12 of the U-shaped connecting rod 5 at the connection with the U-shaped chord 2 to facilitate the connection with the U-shaped chord 2 through the fastener A6. The cable 4 passes through the lower edge flange 14 of the U-shaped connecting rod 5 and is connected to the U-shaped connecting rod 5 through the fastener B15.

[0035] The outer distance between the two parallel webs B12 of the U-shaped connecting rod 5 is 0.5-2 mm smaller than the inner distance between the two parallel webs A9 of the U-shaped chord rod 2 to facilitate installation.

[0036] The U-shaped chord 2, V-shaped strut 3, cable 4, U-shaped connecting rod 5 and fastener A6 are all made of metal materials or composite materials. Fastener A6 is a bolt and nut structure, fastener B15 is a bolt and nut structure, the cable is wrapped around the bolt of fastener B15, and prestress is applied to the cable 4 by tightening the bolt.

[0037] A method for installing a building chord truss beam comprises the following steps:

[0038] Step 1, forming the U-shaped chord 2 and the U-shaped connecting rod 5 by rolling or stretching; forming the V-shaped strut 3 by stamping, or by stretching and bending;

[0039] Step 2: Cut the U-shaped chord 2 and the U-shaped connecting rod 5 according to the design drawings, and drill holes at the designed connection positions of the U-shaped chord 2, the V-shaped strut 3 and the U-shaped connecting rod 5;

[0040] Step 3: Place the U-shaped chord 2 on the installation plane, and connect the V-shaped support rod 3 and the U-shaped connecting rod 5 to it through fasteners A6, as shown in FIG. Figure 5 and Figure 6 As shown;

[0041] Step 4: Both ends of the cable 4 pass through the groove 13 of the V-shaped support rod 3 and are connected to the lower flange plate 14 of the U-shaped connecting rod 5 through the fastener B15. Prestress is applied to the cable 4 by tightening the fastener B15 at one end.

[0042] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A building chord truss beam, characterized in that: It includes a U-shaped chord, a plurality of V-shaped struts connected to the middle section of the U-shaped chord, a U-shaped connecting rod connected to both ends of the U-shaped chord, and a cable connected to the U-shaped connecting rods at both ends, wherein the middle of the cable passes through the bottom of the plurality of V-shaped struts in sequence, and prestress is applied to the chord by tightening the cable; the U-shaped chord is a U-shaped structure with an opening downward, including an upper flange plate located at the top and two parallel webs A located at both sides, and bolt holes are provided at the connection between the middle section of the U-shaped chord and the V-shaped strut and at the connection between the two ends and the U-shaped connecting rod, through the two parallel webs A, so as to facilitate connection with fasteners; The number of the V-shaped braces is determined according to the span and load of the chord truss beam. The overall side of the V-shaped brace is V-shaped, and the cross section of the V-shaped brace is U-shaped with an upward opening, including a lower flange plate and a pair of parallel webs B on both sides. The upper end of the web B is provided with a flange B turned inward, and a groove is provided on the lower flange plate of the V-shaped brace. The cable is passed through the groove. Bolt holes are provided at the connection between the two parallel webs B of the V-shaped brace and the U-shaped chord rod, so as to facilitate the connection with the U-shaped chord rod through the fastener A; Both ends of the upper flange plate extend outwardly from the flange plate to increase the rigidity and bearing capacity outside the plane of the U-shaped chord; The lower ends of the two parallel webs A extend outwardly with flanges to increase the rigidity and bearing capacity outside the plane of the U-shaped chord; The outer distance between the two parallel webs B of the V-shaped brace is 0.5-2 mm smaller than the inner distance between the two parallel webs A of the U-shaped chord; The cross-section of the U-shaped connecting rod is an upwardly open U-shape, including a lower flange plate and a pair of parallel webs B. The upper end of the web B is provided with a flange B turned inward. Bolt holes are provided on the two parallel webs B of the U-shaped connecting rod at the connection with the U-shaped chord to facilitate the connection with the U-shaped chord through the fastener A. The cable passes through the lower edge flange of the U-shaped connecting rod and is connected to the U-shaped connecting rod through the fastener B.

2. A building chord truss beam as claimed in claim 1, characterized in that: The outer edge distance between the two parallel webs B of the U-shaped connecting rod is 0.5-2 mm smaller than the inner edge distance between the two parallel webs A of the U-shaped chord rod.

3. A method for installing a building chord truss beam according to any one of claims 1 to 2, characterized in that: The steps include: Step 1, forming the U-shaped chord and the U-shaped connecting rod by rolling or stretching; forming the V-shaped strut by stamping, or by stretching and bending; Step 2: Cut the U-shaped chord and the U-shaped connecting rod according to the design drawings, and drill holes at the designed connection positions of the U-shaped chord, the V-shaped brace and the U-shaped connecting rod; Step 3: Place the U-shaped chord on the installation plane, and connect the V-shaped support rod and the U-shaped connecting rod to it through fasteners A respectively; Step 4: Pass both ends of the cable through the grooves of the V-shaped support rod and connect to the lower flange plate of the U-shaped connecting rod through fastener B. Apply prestress to the cable by tightening fastener B at one end.

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