Truss

Abstract

The truss comprises an upper chord, a lower chord, a first vertical rod and a second vertical rod, the two ends of the first vertical rod and the two ends of the second vertical rod are connected with the upper chord and the lower chord respectively, the lower chord or / and the upper chord comprises two steel channels arranged in a back-to-back mode, the first vertical rod and the second vertical rod are arranged in a spaced mode and located between the two steel channels, and grooves of the steel channels face outwards. A groove is formed in the steel channel, a connector is fixedly connected in the groove and comprises a base plate contained in the groove, a first opening is formed in the end of the base plate, a second opening is formed in the end of the steel channel and located in the bottom of the groove, and the first opening corresponds to the second opening.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, and in particular to a truss. Background Technology

[0002] Trusses, due to their strong span capacity and ease of installation and dismantling, are increasingly used as temporary structures in cast-in-place box girder and underwater bridge construction projects, such as trestle bridges and drilling platforms. However, existing trusses used in cast-in-place bridges often exhibit insufficient shear resistance at the truss in contact with the columns. Current technologies increase shear resistance by using reinforcing vertical members, but the location of these members may differ for each span, requiring multiple disassemblies and reassemblies, which are time-consuming and labor-intensive. Existing truss technologies suffer from the following problems: insufficient shear resistance, and the method of increasing shear resistance by adding vertical members is not only time-consuming and labor-intensive, but also creates gaps between the vertical members and the truss chords due to repeated disassembly and reassembly. Therefore, a truss with improved shear resistance is needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a truss with improved shear resistance, overcoming the shortcomings of the existing technology.

[0004] The technical solution adopted by this utility model is a truss as described above; it includes an upper chord, a lower chord, and a first upright and a second upright connected to the upper chord and the lower chord at their respective ends. The lower chord and / or the upper chord each include two back-to-back channel steels. The first upright and the second upright are spaced apart and located between the two channel steels. The grooves of the channel steels face outwards. A connector is fixedly connected in the groove. The connector includes a base plate accommodated in the groove. The end of the base plate is provided with a first opening, and the end of the channel steel is provided with a second opening. The second opening is located at the bottom of the groove, and the first opening and the second opening are correspondingly arranged.

[0005] The upper and / or lower sides of the substrate described in this invention are entirely restricted by the side portion of the groove.

[0006] The substrate of this invention covers more than 50% of the area of ​​the groove.

[0007] This utility model has a connecting plate between two channel steels, and the two ends of the connecting plate are fixedly connected to the two channel steels respectively.

[0008] The present invention comprises two or more connecting plates, and each connecting plate has a third opening.

[0009] The connecting plate described in this utility model is arranged horizontally and vertically.

[0010] Both connecting plates of this utility model are arranged horizontally, with one connecting plate above the other. The two third openings are arranged vertically and coaxially. A support member is provided between the two connecting plates, and the two ends of the support member are fixedly connected to the two connecting plates respectively.

[0011] The support component described in this utility model is a steel pipe or a steel plate.

[0012] The connecting plate of this utility model has a third opening, and a screw is provided in the third opening. A bracket is fixedly connected to the upper end of the screw, and a nut is threadedly connected to the screw. The third opening supports the nut.

[0013] The present invention includes a first connecting rod fixed horizontally between the first upright and the second upright, and a first inclined rod that slopes downward from the first upright to the second upright and is fixedly connected between the first upright and the second upright, and a second inclined rod that slopes upward from the first upright to the second upright and is fixedly connected between the first upright and the second upright.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Compared to existing technologies that increase truss shear resistance by installing vertical bars, which is time-consuming and labor-intensive, and whose repeated installation and disassembly create gaps between the vertical bars and truss chords, this invention uses two back-to-back channel steels in both the upper and lower chords. The first and second vertical bars between the two channel steels also increase the truss shear resistance. A connector, including a base plate, is provided in the groove of the channel steel. The connector is fixed to the channel steel, thereby strengthening the shear resistance of the channel steel and ultimately increasing the shear resistance of the truss. In this invention, the base plate is set in the groove, and the base plate is attached to and fixed to the bottom of the groove. The upper and lower sides of the base plate are restricted by the sides of the groove, so the vertical load-bearing performance is significantly enhanced after the base plate is combined with the channel steel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model in a disassembled state. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 2As shown, the truss described in this embodiment includes an upper chord 1, a lower chord 2, and a first upright 3 and a second upright 4 connecting the upper chord 1 and the lower chord 2 at their respective ends. The lower chord 2 and / or the upper chord 1 each include two back-to-back channel steels 11, i.e., the following configuration is provided: the lower chord 2 includes two back-to-back channel steels 11; the upper chord 1 includes two back-to-back channel steels 11; both the lower chord 2 and the upper chord 2 include two back-to-back channel steels 11; the first upright 3 and the second upright 4 are spaced apart and positioned at... Between two channel steels 11, the groove 12 of the channel steel 11 faces outward, where outward refers to the side facing away from the channel steel 11. A connector 13 is fixedly connected within the groove 12. The connector 13 includes a base plate 14 housed within the groove 12. The base plates 14 located on the upper chord 1 and the lower chord 2 can have the same or different lengths. A first opening 15 is provided at the end of the base plate 14, and a second opening 16 is provided at the end of the channel steel 11. The second opening 16 is located at the bottom of the groove 12. The first opening 15 and the second opening 16 are connected. 6. Corresponding configuration; the upper side and / or lower side of the substrate 14 are all restricted by the side portion of the groove 12, i.e., including the following schemes: the upper side of the substrate 14 is restricted by the side portion of the groove 14; the lower side of the substrate 14 is restricted by the side portion of the groove 12; the preferred scheme is that both the upper side and the lower side of the substrate 14 are restricted by the side portion of the groove 12; by restricting the side portion of the substrate 14 by the side portion of the groove 12, the force balance of the substrate 14 within the groove 12 is restricted, ensuring the stability of the substrate 14 after it is welded and fixed to the groove 12; the substrate 1 4. The base plate 14 covers more than 50% of the area of ​​the groove 12. Preferably, the base plate 14 covers 100% of the area of ​​the groove 12. In this embodiment, two back-to-back channel steels 11 are set by the upper chord 1 and the lower chord 2. The first upright 3 and the second upright 4 set between the two channel steels 11 can also increase the shear resistance of the truss. A connector 13 is provided in the groove 12 of the channel steel 11. The connector 13 includes the base plate 14. The connector 13 is fixedly set with the channel steel 11 to enhance the shear resistance of the channel steel 11 and ultimately increase the shear resistance of the truss.

[0020] In this embodiment, a connecting plate 5 is provided between the two channel steels 11, and the two ends of the connecting plate 5 are fixedly connected to the two channel steels 11 respectively; the specific implementation of the connecting plate 5 is as follows:

[0021] In Embodiment 1, there are two or more connecting plates 5, and each connecting plate 5 has a third opening 51. The connecting plates 5 are arranged horizontally and vertically. The shear resistance of the two channel steels 11 is increased in both the horizontal and vertical directions by the connecting plates 5 arranged horizontally and vertically.

[0022] In embodiment two, there are two or more connecting plates 5, and each connecting plate 5 has a third opening 51. Both connecting plates 5 are arranged horizontally, with one connecting plate 5 positioned above the other. The two third openings 51 are arranged vertically and coaxially. A support member 6 is provided between the two connecting plates 5, and both ends of the support member 6 are fixedly connected to the two connecting plates 5 respectively. The support member 6 is a steel pipe or a steel plate. The shear resistance of the two channel steels 11 is increased both horizontally and vertically by the two horizontally arranged connecting plates 5 and the vertically arranged support member 6.

[0023] Preferably, the connecting plate 5 has a third opening 51, and a screw 52 is installed inside the third opening 51. A bracket 53 is fixedly connected to the upper end of the screw 52, ​​and a nut 54 is threaded onto the screw 52. The third opening 51 supports the nut 54. The bracket 53 supports an I-beam or other structure above it, and the height of the bracket 53 is adjusted by the positional relationship between the nut 54 and the screw 52. After the connecting plate 5 has the third opening 51, a screw 52 can be installed inside the connecting plate 5, and the screw 52 is threaded onto the nut 54. The height of the bracket 53 can be adjusted by turning the nut 54.

[0024] In this embodiment, the first connecting rod 7, which is fixed horizontally between the first upright 3 and the second upright 4, also includes a first diagonal rod 8 that slopes downward from the first upright 3 to the second upright 4 and is fixedly connected between the first upright 3 and the second upright 4, and a second diagonal rod 9 that slopes upward from the first upright 3 to the second upright 4 and is fixedly connected between the first upright 3 and the second upright 4. In this embodiment, the functions of the first connecting rod 7, the first diagonal rod 8, and the second diagonal rod 9 are all to enhance the shear resistance of the first upright 3 and the second upright 4.

Claims

1. A truss comprising a top chord (1), a bottom chord (2), a first upright (3) and a second upright (4) each having one end connected to the top chord (1) and the other end connected to the bottom chord (2), the bottom chord (2) or / and the top chord (1) comprising two channel sections (11) arranged back to back, characterized in that, The first vertical rod (3) and the second vertical rod (4) are arranged at intervals and between the two channel steels (11), the groove (12) of the channel steel (11) faces outward, a connecting head (13) is fixedly connected in the groove (12), the connecting head (13) comprises a base plate (14) accommodated in the groove (12), the end of the base plate (14) is provided with a first opening (15), the end of the channel steel (11) is provided with a second opening (16), the second opening (16) is at the bottom of the groove (12), and the first opening (15) and the second opening (16) are arranged correspondingly. ​ 2. A truss as claimed in claim 1, characterized in that The upper side and / or the lower side of the base plate (14) are all limited by the side of the groove (12).

3. A truss as claimed in claim 1, characterized in that The base plate (14) covers more than 50% of the area of the groove (12).

4. A truss as claimed in claim 1, characterized in that The connecting plate (5) is arranged between the two channel steels (11), and the two ends of the connecting plate (5) are fixedly connected with the two channel steels (11) respectively.

5. A truss as claimed in claim 4, characterised in that, The number of the connecting plate (5) is more than two, and the connecting plate (5) is provided with a third opening (51).

6. A truss as claimed in claim 5, characterised in that, The connecting plate (5) is arranged horizontally and vertically.

7. A truss as claimed in claim 5, wherein, The two connecting plates (5) are arranged horizontally, one of the connecting plates (5) is above the other, the two third openings (51) are arranged vertically and coaxially, and a supporting piece (6) is arranged between the two connecting plates (5), and the two ends of the supporting piece (6) are fixedly connected with the two connecting plates (5) respectively.

8. A truss as claimed in claim 7, characterised in that, The supporting piece (6) is a steel pipe or a steel plate.

9. A truss as claimed in claim 4, wherein, The connecting plate (5) is provided with a third opening (51), a screw rod (52) is arranged in the third opening (51), the upper end of the screw rod (52) is fixedly connected with a bracket (53), the screw rod (52) is threadedly connected with a nut (54), and the third opening (51) supports the nut (54).

10. A truss as claimed in claim 4, characterised in that, The first vertical rod (3) and the second vertical rod (4) are fixedly connected with the first connecting rod (7) arranged horizontally, the first inclined rod (8) is arranged downwardly and inclinedly from the first vertical rod (3) to the second vertical rod (4) and is fixedly connected between the first vertical rod (3) and the second vertical rod (4), and the second inclined rod (9) is arranged upwardly and inclinedly from the first vertical rod (3) to the second vertical rod (4) and is fixedly connected between the first vertical rod (3) and the second vertical rod (4).

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