CN213836993U - Use light shelter bridge structure system of cold-formed thin-walled steel - Google Patents
Use light shelter bridge structure system of cold-formed thin-walled steel Download PDFInfo
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- CN213836993U CN213836993U CN202020974559.5U CN202020974559U CN213836993U CN 213836993 U CN213836993 U CN 213836993U CN 202020974559 U CN202020974559 U CN 202020974559U CN 213836993 U CN213836993 U CN 213836993U
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Abstract
The utility model discloses a light gallery bridge structure system using cold-formed thin-walled steel, which comprises a first overhanging frame beam, a second overhanging frame beam, a footpath platform and a handrail truss; the handrail truss comprises a handrail frame and a diagonal bracing structure arranged on the handrail frame; the first overhanging frame beam and the second overhanging frame beam are both connected with the handrail frame, and the pavement platform is fixed between the web member flanges of the two handrail frames. The utility model discloses the existing vertical web member of cold-formed thin wall C shaped steel in the structure guardrail, also have the vertical web member of bracing component and chord member to pass through embedded high strength bolt lug connection, and the mode that the bracing center adopted the two gusset plates in both sides to connect, the gusset plate hot rolling forms, guarantees connected node's rigidity.
Description
Technical Field
The utility model belongs to the technical field of the building, a use light shelter bridge structure system of cold-formed thin-walled steel is related to.
Background
In the construction of modern urban commercial areas, corridor bridges are often adopted for directly connecting buildings, and the functions of communicating the buildings and crossing roads are realized, so that the corridor bridge construction becomes a common project in the construction of the urban commercial areas. The modern walking bridge develops towards the trend of new structures, new materials and new technologies [1], and the gallery bridge is located in the center of a city, so that the construction, operation and maintenance of the gallery bridge and the environmental protection of the site need to be further combined, how to achieve shorter construction period and how to be easier to shape become an important issue in the construction of the gallery bridge. At present, the traditional cast-in-place concrete structure or steel box girder structure is generally adopted for constructing the gallery bridge, and the construction period is long (Luo Zhongtian. trial building cast-in-place reinforced concrete structure construction technology [ J ]. science and technology information, 2012, (19):75-75.), and because the dead weight is large, a large number of structural reinforcement measures are required to be carried out on the main structure at the connecting position of the main structure and buildings at two sides:
1. the concrete structure walking bridge is heavy in structure and long in construction period, main building structures on two sides need to be further reinforced during design, and waste concrete materials are high in subsequent utilization difficulty and low in utilization rate;
2. the steel box girder pedestrian overpass relies on the steel box girder to provide bending resistance, so that the girder height is forced to be improved along with the increase of the design load (Shenyang fan, Qi Ming, Yang bin, Wangshao all. mechanical properties of the steel box girder and the steel truss pedestrian overpass are contrasted and analyzed [ J ]. Shanxi building, 2015:4.), and the existence of a large number of field welding operations causes the actual quality of the engineering to be difficult to control (Bailinyuan, control of welding quality of construction field [ J ]. construction engineering technology and design, 2018,000(002): 979.);
the application of light materials in the field of house construction is becoming mature in recent years, but the actual application in the field of bridges can be counted, and the light steel bridge structure has the advantages of light dead weight, high strength, simplicity in assembly and quickness in construction:
under the background, a lightweight gallery bridge structure system is provided, which uses a handrail frame as a bending-resistant member and utilizes the characteristic of higher space height of a gallery bridge to improve the bending resistance of the structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned prior art, provide a construction of being convenient for, make full use of material, green, the light corridor bridge structure system that comprehensive mechanical properties is excellent.
The utility model discloses at least, one of following technical scheme realizes.
A light gallery bridge structure system using cold-formed thin-walled steel comprises a first overhanging frame beam, a second overhanging frame beam, a walkway platform and handrail trusses; the handrail truss comprises a handrail frame and a diagonal bracing structure arranged on the handrail frame; the first overhanging frame beam and the second overhanging frame beam are both connected with the handrail frame, and the footpath platform is fixed between the web member flanges of the handrail frame.
Further, the handrail frame is made of cold-formed thin-walled steel.
Further, the handrail frame comprises a chord and a plurality of vertical web members, the chord comprises a first chord and a second chord, and the vertical web members are arranged between the first chord and the second chord in parallel at intervals.
Further, the first chord member and the second chord member adopt CC-YT 220x75x20x2.5 cold-formed thin-walled C-shaped steel.
Furthermore, the diagonal bracing structure is made of CC-J180 x70x20x2.5 cold-bending thin-wall steel.
Furthermore, the diagonal bracing structure comprises a first cross brace and a second cross brace, wherein the first cross brace and the second cross brace both comprise diagonal bracing members and diagonal bracing central node plates, every four diagonal bracing members form a pair of cross braces, and the diagonal bracing central node plates fix the diagonal bracing members through high-strength bolts.
Furthermore, the first chord member and the vertical web members are connected with first cross supports, the first cross supports are embedded into the grooves of the first chord member, and the first cross supports are connected with the flanges of the first chord member and the flanges of the vertical web members through high-strength bolts;
the second cross brace is embedded into the groove of the second chord member and connected with the flange of the second chord member and the flange of the vertical web member through the high-strength bolt.
Further, the walkway platform includes a walkway frame and a walkway plate filled in the walkway frame; the walkway frame comprises two parallel longitudinal rods, a central longitudinal rod and a plurality of cross rods, wherein the central longitudinal rod is positioned between the two parallel longitudinal rods and is parallel to the longitudinal rods; the plurality of cross rods and the central longitudinal rod are arranged between the two parallel longitudinal rods at intervals and are vertical to each other, so that a plurality of rectangular units are formed.
Furthermore, the first overhanging frame beam and the second overhanging frame beam are made of I-shaped steel, and two sides of the handrail truss are bolted with longitudinal I-shaped steel flanges of the first overhanging frame beam and the second overhanging frame beam respectively through high-strength bolts.
Further, the first outrigger frame beam comprises a first longitudinal beam and a first lateral beam; one half of the first longitudinal beam is fixed in the main building structure, and the other half of the first longitudinal beam extends outwards; the first cross beam is welded at the position of the first longitudinal beam web, and a stiffening rib is arranged at the welding position; the second external-extension frame beam comprises a second longitudinal beam and a second cross beam; one half of the second longitudinal beam is fixed in the main building structure, and the other half of the second longitudinal beam extends outwards; the second cross beam is welded at the position of the web plate of the second longitudinal beam, and a strengthening rib is arranged at the welding position.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the light gallery bridge utilizes the structural space characteristics, the guardrails on two sides of the common gallery bridge are changed into truss structures with better space structure rigidity, and load transmission is carried out through the truss structures, so that the consumption of structural steel is effectively reduced, and the beam height is reduced;
2. the truss structure guardrail adopts cold-formed thin-walled steel with the wall thickness of 2.5mm, is refined into a plurality of inclined struts within the height range of 4m,
the vertical bending rigidity of the structure meets the standard requirement, the cold-formed thin-wall section steel effectively reduces the steel amount of the structure compared with the common hot-rolled steel, and meanwhile, the assembly rate is greatly improved;
3. the cold-bending thin-wall C-shaped steel in the guardrail with the truss structure not only has vertical web members, but also has diagonal bracing members, wherein the vertical web members are directly connected with the chord members through embedded high-strength bolts, the center of the diagonal bracing is formed by connecting double node plates at two sides in a hot rolling manner, and the rigidity of the connecting nodes is ensured;
4. when the truss structure guardrail is connected with the footpath platform, local reinforcement can be designed at the connecting position according to the actual structure load value by adopting the mode that the longitudinal rod of the footpath platform is directly connected with the web member of the handrail truss;
5. each node in the two-side truss structure guardrail structure is connected by adopting a high-strength bolt, welding is avoided, the on-site construction difficulty and the on-site construction uncertainty are effectively reduced, the installation difficulty is low, the assembled requirement is met, and the construction is safe and economic
The performance is good.
Drawings
FIG. 1 is a side view of a lightweight gallery bridge structural system using thin-walled cold-formed steel according to this embodiment;
FIG. 2 is a cross-sectional view of a lightweight bridge construction system using thin-walled cold-formed steel according to this embodiment;
FIG. 3 is a side view of the arm truss of the present embodiment;
FIG. 4 is a side view of the arm truss framework of the present embodiment;
FIG. 5 is a plan view of the connection of the arm truss units of the present embodiment;
FIG. 6 is a three-dimensional connection diagram of the handrail truss unit according to the embodiment;
FIG. 7 is a top view of the truss of the travelator of this embodiment;
fig. 8 is a top view of the first outrigger frame beam of the present embodiment.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the applicability of the present invention is not limited to the following embodiments.
As shown in fig. 1, a light gallery bridge structure system using cold-formed thin-walled steel, a gallery bridge connecting two side building structures 1, includes a first outrigger frame beam 2, a second outrigger frame beam 3, a walkway platform 4, and a handrail truss 5.
As shown in fig. 3, the handrail truss 5 includes a handrail frame 6 and a diagonal bracing structure 7. As shown in fig. 4, the handrail frame 6 is made of cold-formed thin-walled steel, which includes chords 8 and vertical web members 9. Chord 8 includes that length is first chord and the second chord 40 meters for L, and a plurality of vertical web members 9 interval distribution are between parallel first chord and second chord. The first chord member and the second chord member adopt CC-YT 220x75x20x2.5 cold-bending thin-wall C-shaped steel, the distance Le between every two adjacent vertical web members is 1.25m, the adjacent vertical web members 9 adopt CC-J180 x70x20x2.5 cold-bending thin-wall steel, and 33 vertical web members 9 are arranged. C shaped steel recess opening of first chord member is downward, and the C shaped steel opening of second chord member is upwards, and vertical web member 9 both ends use 8.8 level M14 high strength bolt connection in the opening of first chord member and second chord member of embedding.
As shown in fig. 5 and 6, the diagonal brace structure 7 is made of CC-J180 × 7020 × 2.5 cold-formed thin-walled steel, and includes a first cross brace and a second cross brace, where the first cross brace and the second cross brace are mainly composed of diagonal brace members 10 and a diagonal brace central node plate 11, in this embodiment, every 4 diagonal brace members 10 form a pair of cross braces, holes are formed at web plates and flange positions at the edges of the diagonal brace members 10, and the diagonal brace central node plate 11 fixes the 4 diagonal brace members 10 through high-strength bolts.
The first cross brace is simultaneously connected with the first chord member and the vertical web member 9, the first cross brace is embedded into the C-shaped steel groove of the first chord member, and the first cross brace is connected with the flange of the first chord member and the flange of the vertical web member through high-strength bolts;
the second cross brace is embedded into the C-shaped steel groove of the second chord member and is connected with the flange of the second chord member and the flange of the vertical web member through high-strength bolts;
both sides of the first cross brace and the second cross brace are connected with the vertical web member 9 through gusset plates.
As shown in fig. 2, the longitudinal web of the walkway platform 4 is fixed between the web flanges of the handrail truss 5 by high-strength bolts, and the distance between the elevation of the walkway platform 4 and the elevation of the second chord of the handrail truss 5 is 0.5 m.
The first overhanging frame beam 2 and the second overhanging frame beam 3 are made of I-shaped steel, and a first chord member and a second chord member web plate of the handrail truss 5 are bolted with longitudinal I-shaped steel flanges of the first overhanging frame beam 2 and the second overhanging frame beam 3 respectively through high-strength bolts.
As shown in fig. 8, the first outrigger frame beam 2 and the second outrigger frame beam 3 both adopt HW 200x200x8/12 section steel, the first outrigger frame beam 2 includes a first longitudinal beam 15 and a first cross beam 16, the first longitudinal beam 15 is fixed in the main building structure 1, in this embodiment, the length LL of the first longitudinal beam 15 is 10m, wherein the length LL1 is 5m and is anchored in the main building structure 1, and the length LL2 is 5 m; the first cross beam 16 is welded at the web position of the first longitudinal beam 15, and a stiffening rib is arranged at the welding position; the extended section of the first longitudinal beam 15 is provided with a hole at the long flange, and the first longitudinal beam 15 is connected with the first cross beam 16 and the first chord flange of the handrail truss 5 through a high-strength bolt. The second outrigger frame beam 3 is constructed and mounted in the same manner as the first outrigger frame beam 2. The second external-extension frame beam 3 comprises a second longitudinal beam and a second cross beam; one half of the second longitudinal beam is fixed in the main building structure, and the other half of the second longitudinal beam extends outwards; the second cross beam is welded at the position of the web plate of the second longitudinal beam, and a stiffening rib is arranged at the welding position.
As shown in fig. 7, the walkway platform 4 includes a walkway frame 3 and a walkway material filled in the walkway frame 3; the walkway frame 3 comprises two parallel longitudinal bars 12, a central longitudinal bar 13 and a plurality of cross bars 14, wherein the central longitudinal bar 13 is positioned between the two parallel longitudinal bars 12 and is parallel to the longitudinal bars 12; the plurality of cross bars 14 are perpendicular to the central longitudinal bar 13 and are arranged between the two parallel longitudinal bars 12 at intervals to form a plurality of rectangular units. The length of the footpath frame 3 in the embodiment is 40m, the width is 5m, the distance between the bottom surface elevation and the handrail bottom surface elevation is 0.5m, the rectangular unit is 1.25m multiplied by 2.5m, and asynchronous footpath materials such as wood footpath plates can be filled in the rectangular unit according to the actual engineering requirements;
the embodiment is based on the engineering that the floor height H is 4m, the inter-floor distance L is 40m, and the corridor bridge width W is 5 m. The first outrigger frame beam 2 and the second outrigger frame beam 3 have a length LL of 10m and a width W of 5m, wherein half of the length is fixed to the main building structure 1 by an anchoring structure, and an overhang length LL1 of 5m is LR 1. The length of the handrail truss 5 is the same as the distance between the floors, the length L is 40m, the height is the same as the floor height, the height H is 4m, and the height Ha of the anchoring structure is 4.4 m. The handrail truss 5 is the main bearing structure of the light gallery bridge, and the mass of a single truss is about 400kg through calculation and statistics, and the deflection meets the requirement under the standard load.
In actual construction, the concrete steps are as follows:
1. the rod piece manufacturing is realized in advance in a factory, and in the manufacturing of the longitudinal rod 12, if the longitudinal rod needs to be assembled in a segmented mode, the longitudinal rod is connected through an inner nested pipe;
2. welding a first overhanging frame beam 2 and a second overhanging frame beam 3 in a factory, and connecting all sections of chord web members and longitudinal rod cross rods into a footpath platform 4 and an armrest truss 5;
3. after the construction of each main body component is completed, the main body components are transported to the site in sections to be installed and prepared;
4. in the field construction part, firstly, anchoring upper and lower extending beams on two sides with a main building structure 1, then hoisting handrail trusses 5 on two sides, and connecting a second chord on the truss with the anchored extending beams by adopting high-strength bolts to finish the fixing construction of a single handrail truss;
5. after the handrail trusses 5 on the two sides are installed and fixed, the pavement platform is hoisted from the two sides by adopting hoisting machinery, and longitudinal rod members on the outer side of the pavement platform and web members of the handrail trusses are fixed by adopting bolts.
In this embodiment, this use light shelter bridge structure system of cold-formed thin-walled steel is under the prerequisite of guaranteeing structural mechanics performance, through cold-formed thin-walled steel as the main material to the handrail truss is as main stress structure, corridor bridge quality, cost and construction period that effectively reduce, and energy-concerving and environment-protective, while stable in structure, it is convenient to be under construction, and the joint strength of detail junction has guaranteed the people's travelling comfort, accords with the overall requirement of assembled.
The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A light gallery bridge structure system using cold-formed thin-walled steel is characterized by comprising a first overhanging frame beam (2), a second overhanging frame beam (3), a footpath platform (4) and a handrail truss (5); the handrail truss (5) comprises a handrail frame (6) and a diagonal bracing structure (7) arranged on the handrail frame (6); the first overhanging frame beam (2) and the second overhanging frame beam (3) are both connected with the handrail frame (6), and the footpath platform (4) is fixed between web member flanges of the handrail frame (6).
2. A lightweight corridor bridge structure system using cold-formed thin-walled steel according to claim 1, characterized in that the handrail frame (6) is made of cold-formed thin-walled steel.
3. A lightweight corridor bridge construction system using cold-formed thin-walled steel according to claim 1 or 2, characterised in that the handrail frame (6) comprises chords (8) and vertical web members (9), the chords (8) comprising first and second chords, the vertical web members (9) being spaced apart between the parallel first and second chords.
4. The system of claim 3, wherein the first and second chords are made of CC-YT 220x75x20x2.5 thin-walled cold-formed steel.
5. A light-weight gallery bridge structure system using thin-walled cold-formed steel according to claim 4, characterized in that the bracing structure (7) is made of CC-J180 x70x20x2.5 thin-walled cold-formed steel.
6. A lightweight corridor bridge structure system using cold-formed thin-walled steel sections according to claim 5, characterized in that the bracing structure (7) comprises a first cross brace and a second cross brace, each of which comprises a bracing member bar (10) and a bracing center gusset plate (11), every 4 bracing member bars (10) constitute a pair of cross braces, and the bracing center gusset plate (11) fixes 4 bracing member bars (10) by high-strength bolts.
7. A light-weight gallery and bridge structural system using thin-walled cold-formed steel as claimed in claim 6, wherein the first chord member and the vertical web members (9) are connected to a first cross brace, the first cross brace is embedded in the groove of the first chord member, and the first cross brace is connected to the first chord member flange and the vertical web member flange through high-strength bolts;
the second cross brace is embedded into the groove of the second chord member and connected with the flange of the second chord member and the flange of the vertical web member through the high-strength bolt.
8. A lightweight gallery bridge structure system using thin-walled cold-formed steel according to claim 1 wherein the walkway platform (4) includes a walkway frame and a walkway plate filled in the walkway frame; the walkway frame comprises two parallel longitudinal rods (12), a central longitudinal rod (13) and a plurality of transverse rods (14), wherein the central longitudinal rod (13) is positioned between the two parallel longitudinal rods (12) and is parallel to the longitudinal rods (12); the plurality of cross rods (14) are perpendicular to the central longitudinal rod (13) and are arranged between the two parallel longitudinal rods (12) at intervals to form a plurality of rectangular units.
9. A light-weight gallery bridge structure system using cold-formed thin-walled steel sections according to claim 1, wherein the first outrigger frame beam (2) and the second outrigger frame beam (3) are made of i-steel, and both sides of the handrail truss (5) are bolted to longitudinal i-steel flanges of the first outrigger frame beam (2) and the second outrigger frame beam (3) respectively by high-strength bolts.
10. A lightweight gallery bridge structure system using thin-walled cold-formed steel as claimed in claim 9 wherein the first outrigger frame beam (2) includes a first longitudinal beam (15) and a first transverse beam (16); one half of the first longitudinal beam (15) is fixed in the main building structure (1), and the other half extends outwards; the first cross beam (16) is welded at the position of a web plate of the first longitudinal beam (15), and a stiffening rib is arranged at the welding position;
the second external-extension frame beam (3) comprises a second longitudinal beam and a second cross beam; one half of the second longitudinal beam is fixed in the main building structure, and the other half of the second longitudinal beam extends outwards; the second cross beam is welded at the position of the web plate of the second longitudinal beam, and a strengthening rib is arranged at the welding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974559.5U CN213836993U (en) | 2020-05-31 | 2020-05-31 | Use light shelter bridge structure system of cold-formed thin-walled steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974559.5U CN213836993U (en) | 2020-05-31 | 2020-05-31 | Use light shelter bridge structure system of cold-formed thin-walled steel |
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| Publication Number | Publication Date |
|---|---|
| CN213836993U true CN213836993U (en) | 2021-07-30 |
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| CN202020974559.5U Expired - Fee Related CN213836993U (en) | 2020-05-31 | 2020-05-31 | Use light shelter bridge structure system of cold-formed thin-walled steel |
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| Country | Link |
|---|---|
| CN (1) | CN213836993U (en) |
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2020
- 2020-05-31 CN CN202020974559.5U patent/CN213836993U/en not_active Expired - Fee Related
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Granted publication date: 20210730 |