CN205046459U - Derive formula member reinforced structure and have its steel longeron of steel longeron - Google Patents

Abstract

The utility model discloses a steel longeron formula member reinforced structure of deriving. It includes upper chord, lower chord, erects web member and diagonal bracing, erects web member and diagonal bracing and all connects between upper chord and lower chord, erects node of web member, diagonal bracing and upper chord or lower chord sharing. This embodiment is still set up one and is derived the formula and connect the member on the steel longeron has had the member, connect member one end and be connected with the diagonal bracing, and the other end is continuous with the lower chord to the drift of reduction diagonal bracing, the stability and the bearing capacity of increase member. The utility model also provides a steel longeron is consolidated to the formula member of deriving that has above -mentioned structure.

Description

Steel truss-derived member-reinforced structure and its steel truss

technical field

The utility model relates to a reinforced structure of a steel truss girder in the construction process and a steel truss girder with the reinforced structure, and is especially suitable for when the section of the steel truss girder is weak or the bearing capacity of the bar is insufficient due to the relatively large slenderness of the bar reinforcement.

Background technique

At present, steel truss girders are more and more used in bridge structures. The height of the main truss of long-span steel girders is often controlled. The use of rods is even more limited. Reasonable selection of rods can reduce the self-weight of steel truss girders by 20~30%.

The Yellow River Super Bridge of Huangda Railway is a double-track railway, designed as a parallel chord steel truss girder, with a maximum member length of 20.9m and a member slenderness ratio of 105. During the construction of the steel truss girder, the member was under compression.

Contents of the invention

In the prior art, blindly enlarging the cross-section of the steel truss girder will increase the amount of design and construction work. At the same time, multiple cross-sections of the steel truss girder may need to be strengthened. Changes will cause a series of changes. The utility model provides a steel truss girder derived rod reinforcement structure, which adopts additional oblique supports, reduces the slenderness ratio of the rods, and improves the bearing capacity of the rods.

The technical scheme that the utility model solves its technical problem adopts is:

A steel truss girder derived rod reinforcement structure, comprising an upper chord, a lower chord and a diagonal web, the diagonal web is connected between the upper chord and the lower chord, and a connecting rod, the connecting rod One end of the member is connected with the diagonal rod, and the other end is connected with the lower chord.

According to the steel truss girder derived rod reinforcement structure in the embodiment of the present invention, the rods are derived from the existing rods of the steel truss girder, and the rods are connected with the lower chord main truss, so as to reduce the free length of the oblique web rods, thereby increasing Stability of the bar.

In addition, the steel truss girder derived rod reinforcement structure according to the embodiment of the present invention may also have the following additional technical features:

Preferably, the connecting rod is arranged obliquely, and the direction of inclination is opposite to the direction of inclination of the diagonal rod connected thereto. It can be seen that the connecting rods can increase the bearing capacity of the diagonal rods.

Preferably, the connecting rod and the lower chord are hingedly connected, and the connecting rod and the diagonal rod are fixedly connected. The connecting rod and the lower chord are hinged, which is not only beneficial to construction and installation, but also convenient to adjust the angle between the connecting rod and the lower chord according to the inclination angle of the diagonal rod, which is conducive to firm installation.

Preferably, vertical webs are also included, and the vertical webs, diagonal webs and upper chords or lower chords share a node.

Preferably, both ends of the connecting rod are respectively connected to the diagonal rod through an upper hoop and a lower hoop. If the welding method is adopted, the welding will destroy the integrity of the original rod, and the residual stress of welding will affect the bearing capacity of the rod and also damage the paint of the rod. Connect two adjacent rods with section steel (that is, connecting rods), connect two steel plates (upper and lower cover plates of the hoop) at both ends of the section steel, and fix the steel plates with fine-rolled rebar, using hoops at both ends In this way, the web bar is connected to the lower chord, and the friction force of the hoop prevents the relative displacement of the bar.

Preferably, the upper hoop includes an upper cover plate of the upper hoop, a lower cover plate of the upper hoop, a first threaded steel and a first nut, and the upper cover plate of the upper hoop and the lower cover plate of the upper hoop are arranged on The two sides of the oblique web rod, and the two sides of the upper cover plate of the upper hoop and the lower cover plate of the upper hoop are fastened and connected with the first threaded steel and the first nut; the lower cover plate of the upper hoop is connected with the lower cover plate of the upper hoop The above-mentioned connecting rods are fixedly connected.

Preferably, the cross-section of the diagonal-web bar is "I"-shaped, and further includes a first stiffening steel plate and/or a second stiffening steel plate, the first stiffening steel plate is welded inside the diagonal-web bar; the second stiffening steel plate The steel plate is welded between the two ends of the upper cover plate of the upper hoop or the lower cover plate of the upper hoop and the side of the diagonal rod.

Preferably, the lower hoop includes an upper cover plate of the lower hoop, a lower cover plate of the lower hoop, a second threaded steel and a second nut, and the upper cover plate of the lower hoop and the lower cover plate of the lower hoop are arranged on The two sides of the lower chord, and the two sides of the upper cover plate of the lower hoop and the lower cover plate of the lower hoop are fastened and connected with the second threaded steel and the second nut, and the upper cover of the lower hoop is fixed with a connection plate, and the connecting plate is hingedly connected to the connecting rod through pin holes and pins.

Preferably, it also includes a third stiffened steel plate and/or a fourth stiffened steel plate, the third stiffened steel plate is welded between the connecting plate and the upper cover plate of the lower hoop; the fourth stiffened steel plate is welded between the lower hoop Between the two ends of the upper cover plate of the hoop or the lower cover plate of the lower hoop and the side of the lower chord.

The utility model also provides a derived-type rod-reinforced steel truss beam, which has any one of the steel truss-beam derived-type rod-reinforced structures described above.

The effective effect of strengthening the steel truss girder by the derivative rod is: the bearing capacity of the diagonal web is improved while the original diagonal web is not damaged.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the overall structural diagram of the utility model steel truss girder derived type bar reinforcement structure;

Fig. 2 is the elevation of the upper hoop structure of the steel truss girder derived type bar reinforcement structure of the utility model;

Fig. 3 is the side view of Fig. 2;

Fig. 4 is the structural diagram of the first stiffened steel plate;

Fig. 5 is the structural diagram of the second stiffened steel plate;

Fig. 6 is the elevation view of the lower hoop structure of the steel truss girder derived rod reinforcement structure of the present invention;

Figure 7 is a side view of Figure 6;

Fig. 8 is the structural diagram of connecting plate;

Fig. 9 is a structural diagram of the third stiffened steel plate;

Fig. 10 is a structural diagram of the fourth stiffening steel plate.

Explanation of reference signs:

Upper chord 1; Lower chord 2; Diagonal web 3; Vertical web 4; Connecting rod 5; Upper hoop 6; Lower hoop 7; A threaded steel 10; the first nut 11; the first stiffened steel plate 12; the second stiffened steel plate 13; the upper cover plate 14 of the lower hoop; the lower cover plate 15 of the lower hoop; ; Connecting plate 18; Pin 19; The third stiffened steel plate 20; The fourth stiffened steel plate 21.

detailed description

Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

The steel truss girder derived rod reinforcement structure according to the embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1-Fig. 10 specifically show the steel truss girder derivative type bar reinforcement structure of this embodiment. It includes upper chord 1, lower chord 2, vertical web 4 and oblique web 3, vertical web 4 and oblique web 3 are connected between upper chord 1 and lower chord 2, vertical web 4, oblique web 3 and the upper chord 1 or the lower chord 2 share a node. In this embodiment, a derivative connecting member 5 is added to the existing member of the steel truss girder. One end of the connecting member 5 is connected to the diagonal member 3, and the other end is connected to the lower chord member 2, thereby reducing the freedom of the diagonal member 3. The length increases the stability and bearing capacity of the rod.

There is a hinged connection between the connecting rod 5 and the lower chord 2, and a fixed connection between the connecting rod 5 and the diagonal rod 3. The connection between the connecting rod 5 and the lower chord 2 is hinged, which is not only conducive to construction and installation, but also convenient to adjust the angle between the connecting rod 5 and the lower chord 2 according to the different inclination angles of the diagonal rod 3, which is conducive to firm installation .

Both ends of the connecting rod 5 are respectively connected to the diagonal rod 3 through an upper hoop 6 and a lower hoop 7 . If the welding method is adopted, the welding will destroy the integrity of the original rod, and the residual stress of welding will affect the bearing capacity of the rod and also damage the paint of the rod. Connect two adjacent rods with section steel (that is, the connecting rod 5), connect two steel plates (upper and lower cover plates of the hoop) at both ends of the section steel, and fix the steel plates with precision-rolled rebar, and use hoops at both ends The method is to connect the abdominal oblique rod 3 with the lower chord rod 2, and the friction force of the hoop prevents the relative displacement of the rods.

The upper hoop 6 includes the upper hoop cover plate 8, the upper hoop lower cover plate, the first rebar 10 and the first nut 11, the upper hoop upper cover plate 8, and the upper hoop lower cover plate are arranged on the oblique belly The two sides of bar 3, and the both sides of upper hoop upper cover plate 8 and upper hoop lower cover plate are fastened and connected with first threaded steel 10 and first nut 11. The lower cover plate of the upper hoop is fixedly connected with the connecting rod 5 . The section of the oblique web bar 3 is "I" shaped, and also includes a first stiffening steel plate 12 and/or a second stiffening steel plate 13 . The first stiffening steel plate 12 is welded inside the diagonal web bar 3 . The second stiffening steel plate 13 is welded between the two ends of the upper cover plate 8 of the upper hoop or the lower cover plate of the upper hoop and the side of the diagonal web bar 3 .

The lower hoop 7 includes an upper cover plate 14 of the lower hoop, a lower cover plate 15 of the lower hoop, a second threaded steel 16 and a second nut 17 . The lower hoop upper cover plate 14 and the lower hoop lower cover plate 15 are located on both sides of the lower chord 2, and the two sides of the lower hoop upper cover plate 14 and the lower hoop lower cover plate 15 use the second threaded steel 16 and The second nut 17 is tightly connected, and the upper cover plate 14 of the lower hoop is fixedly provided with a connecting plate 18, which is hingedly connected with the connecting rod 5 through a pin hole and a pin 19. The structure of the lower hoop 7 also includes a third stiffening steel plate 20 and/or a fourth stiffening steel plate 21 , and the third stiffening steel plate 20 is welded between the connecting plate 18 and the upper cover plate 14 of the lower hoop. The fourth stiffening steel plate 21 is welded between the two ends of the upper cover plate 14 of the lower hoop or the lower cover plate 15 of the lower hoop and the side of the lower chord 2 .

Referring to FIG. 1 , the utility model also provides a derivative-type rod-reinforced steel truss girder, which has any one of the steel truss-beam derivative-type rod-reinforced structures described above.

As a specific example of the steel truss girder, the lower chord 2 is a box-shaped section with a length of 10 m. The diagonal rod 3 has an I-shaped section and a length of 17m, and is a reinforced rod. The connecting rod 5 is 2I45a I-beam with a length of 6.20m. The upper cover plate of the hoop is processed by 1100×600×20mm steel plate. The lower cover plate of the hoop is processed by 1100×600×20mm steel plate. The first rebar 10: 4 pieces of Φ32 finish-rolled rebar are used for a single hoop, and the single preload is 30t. The first nut 11: a finish-rolled rebar nut, 8 upper hoops 6 in total. The first stiffening steel plate 12: 2cm thick steel plate processing, 790mm×390mm, 2 pieces in total. The second stiffening steel plate 13: 2cm thick steel plate processing, 100×250mm, 2 pieces in total. Lower hoop and upper cover plate 14: 1100×600×20mm steel plate processing. Lower hoop and lower cover plate 15: 1100×600×20mm steel plate processing. Connecting steel plate: 500×350×20mm steel plate processing, open φ52mm pin hole. Stiffening steel plate: made of 2cm thick steel plate, welded with the upper and lower cover plate steel plates. Pin 19: φ50mm pin, length 45cm, made of No. 45 quenched and tempered steel, quenched. The third stiffening plate: the upper cover plate 14 of the lower hoop is welded with the connecting steel plate, and the 2cm steel plate is processed. The second rebar 16: φ32 finish-rolled rebar, single preload 30t, 4 lower hoops 7 in total. The second nut 17: a finish-rolled rebar anchor nut, 8 lower hoops 7 in total.

The construction method of the reinforced structure of the steel truss girder in this embodiment is: after the installation of the steel truss girder is completed, the lower hoop 7 is installed on the lower chord 2 of the steel truss girder, and the upper hoop 7 is pre-tightened by a jack. Single preload 30t. Then install the connecting rod 5, the connecting rod 5 and the lower hoop 7 are pinned with Φ50mm pins, the connecting rod 2I45a I-beam and the upper hoop 6 are closely attached to the steel truss beam (reinforced rod), and then installed The upper cover plate 8 of the upper hoop is pre-tightened by Φ32 fine-rolled rebar, and the upper hoop 6 is reliably connected with the inclined rod.

Although the embodiments of the present invention have been shown and described; those skilled in the art can understand that various changes, modifications, substitutions and Modifications; the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A steel truss girder derived type member reinforcement structure, comprising an upper chord, a lower chord and a diagonal rod, and the diagonal rod is connected between the upper chord and the lower chord, it is characterized in that it also includes a connecting rod One end of the connecting rod is connected to the diagonal rod, and the other end is connected to the lower chord. 2. The steel truss girder-derived rod-reinforced structure according to claim 1, characterized in that, the connecting rods are arranged obliquely, and the direction of inclination is opposite to the direction of inclination of the connected diagonal members. 3. The steel truss girder derived rod reinforcement structure according to claim 1, characterized in that, the connecting rod and the lower chord are hinged, and the connecting rod and the diagonal rod for a fixed connection. 4. The steel truss girder-derived member-reinforced structure according to claim 1, further comprising vertical webs, and the vertical webs, diagonal webs, and upper chords or lower chords share one node. 5. The steel truss girder derivative rod reinforcement structure according to any one of claims 1-4, characterized in that, the two ends of the connecting rod are respectively connected to the diagonal by an upper hoop and a lower hoop on the belly bar. 6. The steel truss girder derived rod reinforcement structure according to claim 5, characterized in that, the upper hoop comprises an upper cover plate of the upper hoop, a lower cover plate of the upper hoop, a first threaded steel and a first Nut, the upper cover plate of the upper hoop and the lower cover plate of the upper hoop are arranged on both sides of the diagonal web rod, and the two sides of the upper cover plate of the upper hoop and the lower cover plate of the upper hoop are provided with the first thread The steel is fastened to the first nut; the upper hoop and the lower cover are fixedly connected to the connecting rod. 7. The steel truss girder derived-type rod reinforcement structure according to claim 6, characterized in that, the section of the diagonal web rod is in the shape of "I", and also includes a first stiffening steel plate and/or a second stiffening steel plate, so that The first stiffening steel plate is welded inside the diagonal web bar; the second stiffening steel plate is welded between the two ends of the upper hoop upper cover plate or the upper hoop lower cover plate and the side of the diagonal web bar. 8. The steel truss girder derived rod reinforcement structure according to claim 5, wherein the lower hoop comprises an upper cover plate of the lower hoop, a lower cover plate of the lower hoop, a second threaded steel and a second Nut, the upper cover plate of the lower hoop and the lower cover plate of the lower hoop are arranged on both sides of the lower chord, and the two sides of the upper cover plate of the lower hoop and the lower cover plate of the lower hoop are provided with the second threaded steel and the second The two nuts are tightly connected, and a connecting plate is fixed on the upper cover of the lower hoop, and the connecting plate is hingedly connected with the connecting rod through a pin hole and a pin. 9. The steel truss girder derived rod reinforcement structure according to claim 8, further comprising a third stiffening steel plate and/or a fourth stiffening steel plate, the third stiffening steel plate being welded between the connecting plate and the Between the upper cover of the lower hoop; the fourth stiffening steel plate is welded between the upper cover of the lower hoop or the two ends of the lower cover of the lower hoop and the side of the lower chord. 10. A derived bar-reinforced steel truss, characterized in that it has the steel truss-derived bar-reinforced structure according to any one of claims 1-9.