CN109356292B - Assembled prestressing force large-span beam structure - Google Patents
Assembled prestressing force large-span beam structure Download PDFInfo
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- CN109356292B CN109356292B CN201811442186.0A CN201811442186A CN109356292B CN 109356292 B CN109356292 B CN 109356292B CN 201811442186 A CN201811442186 A CN 201811442186A CN 109356292 B CN109356292 B CN 109356292B
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- supporting rod
- lower chord
- truss girder
- web members
- girder
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- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 239000004567 concrete Substances 0.000 claims description 16
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 14
- 238000005452 bending Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/10—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal prestressed
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides an assembled prestress large-span girder structure, which comprises a truss girder, wherein the truss girder comprises an upper chord, a lower chord and a plurality of assembling units, the upper chord comprises a first supporting rod and a second supporting rod which are arranged in parallel and at intervals, and the first supporting rod is connected with the second supporting rod through a connecting piece; the lower chord is arranged below the upper chord and between the first supporting rod and the second supporting rod, and the lower chord is arranged in parallel with the upper chord; the assembly unit comprises a plurality of web members, the lower ends of the web members are adjacently arranged and hinged with the lower chord member, the upper ends of one part of web members are hinged with the first supporting rod, the upper ends of the other part of web members are hinged with the second supporting rod, the web members connected to the first supporting rod are arranged at intervals, and the web members connected to the first supporting rod are arranged at intervals. The invention can be assembled according to the use requirement on site, the construction is convenient and quick, the cost is reduced, the joint is in a hinged mode, the axle center of the web member is ensured not to be affected by bending moment, and the invention is green in construction and convenient in maintenance.
Description
Technical Field
The invention relates to the technical field of industrial assembly type buildings, in particular to an assembly type prestress large-span beam structure.
Background
The fabricated steel structure has various advantages, such as mass production, field assembly, green construction and rapid construction, and has obvious advantages compared with a concrete structure in anti-seismic performance, and is a novel structure which is developed in recent years, so that the fabricated steel structure is widely applied to the design and construction of house buildings, but rarely applied to a large-span structure.
The large-span beam type structure is mostly a prestressed concrete structure, the size and the components are huge, the section height-thickness ratio is too large, the space requirement is higher, the material consumption is huge, the manufacturing cost is too high, and the earthquake resistance is weakened due to the excessive midspan deformation; the traditional large-span beam type structure is mostly rigid connection nodes, the nodes are complex, the construction difficulty is high, the construction speed is slow, the period is long, the construction pollution is serious, and the maintenance after earthquake is difficult.
Disclosure of Invention
The invention aims to provide an assembled prestress large-span beam structure which can save space, is convenient to construct and is convenient to maintain.
To achieve the above object, the present invention provides an assembled pre-stressed long span girder structure, comprising a girder including:
the upper chord comprises a first supporting rod and a second supporting rod which are parallel and are arranged at intervals, and the first supporting rod is connected with the second supporting rod through a connecting piece;
the lower chord is arranged below the upper chord and between the first supporting rod and the second supporting rod, and the lower chord is arranged in parallel with the upper chord;
the assembly units comprise a plurality of web members, the lower ends of the web members are adjacently arranged and hinged with the lower chord members, one part of the upper ends of the web members are hinged with the first supporting rods, the other part of the upper ends of the web members are hinged with the second supporting rods, the web members are connected to the first supporting rods at intervals, and the web members are connected to the first supporting rods at intervals.
The assembled prestress large-span beam structure comprises the web members connected to the two ends and the middle of the lower chord member and the connecting units, wherein the web members are buckling-restrained supporting rods, each buckling-restrained supporting rod comprises a sleeve and an H-shaped steel energy-dissipation inner core arranged in the sleeve, and concrete is filled between the sleeve and the H-shaped steel energy-dissipation inner core.
The assembled prestress large-span beam structure comprises the first supporting rod, the second supporting rod and the lower chord member, wherein a plurality of lug plates are respectively arranged on the first supporting rod and the lower chord member, and the two ends of the web member and the two ends of the buckling-restrained supporting rod are respectively provided with an assembling piece capable of being hinged with the lug plates.
The assembled prestress large-span beam structure comprises at least two parallel connecting plates which are arranged at intervals, the lug plate can be inserted between the two connecting plates, a lug plate through hole is formed in the lug plate, a connecting through hole corresponding to the lug plate through hole is formed in the connecting plate, the connecting plate passes through the two connecting through holes and the lug plate through hole to be screwed with a nut through bolts, and the connecting plate is connected with the lug plate.
The assembled prestress large-span beam structure comprises the assembly members, wherein the assembly members further comprise fixing plates connected to two ends of the web members and two ends of the buckling-restrained brace, and the connecting plates are connected to the fixing plates.
The assembled prestress large-span beam structure comprises a plurality of connecting rods, wherein the connecting rods are identical in structure with the web members, and an included angle larger than 0 degrees and smaller than 180 degrees is formed between two adjacent connecting rods.
The assembled prestress large-span beam structure comprises the connecting rods, wherein the included angle between every two adjacent connecting rods is 60 degrees.
The assembled prestress large-span beam structure comprises the lower chord member, wherein non-shrinkage concrete is filled in the lower chord member, and at least one prestress steel strand is embedded in the non-shrinkage concrete.
The assembled prestressed large-span girder structure as described above, wherein an angle formed between the web member and the lower chord is 60 °.
The assembled prestress large-span beam structure comprises the first supporting rods, wherein the first supporting rods are connected with first truss supporting beams, the second supporting rods are connected with second truss supporting beams, the structures of the first truss supporting beams and the structures of the second truss supporting beams are the same as those of the truss beams, the second supporting rods of the first truss supporting beams and the second supporting rods of the second truss supporting beams are the same, the lower chord members of the first truss supporting beams are the first supporting rods of the truss beams, and the lower chord members of the second truss supporting beams are the second supporting rods of the truss beams.
Compared with the prior art, the invention has the following advantages:
the assembled pre-stress large-span beam structure provided by the invention has the advantages that the web members are hinged with the upper chord members and the lower chord members, so that the assembled pre-stress large-span beam structure can be prefabricated in a factory and assembled in a site according to the use requirement, the construction is convenient and quick, the cost is reduced, the space volume is small, meanwhile, the hinge joint is adopted, the axle center of the web members is prevented from being affected by bending moment, the stress is reasonable, the assembly technology, the BRB (buckling restrained brace) technology and the pre-stress technology are comprehensively applied, the steel consumption of the section is reduced, the anti-seismic performance is improved, the green construction is realized, and the maintenance is convenient;
according to the assembled pre-stress large-span beam structure, buckling-restrained supporting rods are adopted to replace web members at two ends and a midspan unit of the assembled pre-stress large-span beam structure, so that the buckling-restrained supporting rods can effectively consume energy to enhance the large-vibration anti-vibration stability of the beam structure, strengthen the bending resistance, improve the anti-vibration performance, optimize the section and further save the space, and the assembled pre-stress large-span beam structure has higher space flexibility;
the assembled prestress large-span beam structure has the advantages that the upper chord member, the lower chord member and the web members are all round steel pipes, the steel pipes are reasonable in acceptance, the section moments of inertia in the horizontal direction and the vertical direction are equal, the torsion resistance is good, and the earthquake resistance is good;
the assembled prestress large-span beam structure of the invention can realize batch production of all parts by factories, so that the on-site assembly operation is simple and convenient,
according to the assembled pre-stress large-span beam structure, pre-stress is applied to the lower chord member in advance through the pre-stress steel stranded wires, so that the tension effect of the lower chord member is resisted, and the stress performance of the lower chord member is enhanced and optimized.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic perspective view of an assembled pre-stressed long span beam structure of the present invention;
FIG. 2 is a schematic front view of the fabricated prestressed large span beam structure of FIG. 1;
FIG. 3 is a schematic view of the structure of section A-A of FIG. 2;
FIG. 4 is a schematic view of the buckling restrained brace in the fabricated prestressed large span beam structure of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the buckling restrained brace shown in FIG. 4;
FIG. 6 is a schematic cross-sectional view of the lower chord of the fabricated prestressed large span beam structure of FIG. 1;
fig. 7 is a schematic cross-sectional view of another fabricated prestressed large-span girder structure of the present invention.
Reference numerals illustrate:
100. truss girder;
1. a first strut;
2. a second strut;
3. a connecting rod;
4. a lower chord; 41. non-shrinkage concrete; 42. prestress steel strand;
5. a web member;
6. buckling-restrained brace; 61. a sleeve; 62. concrete; 63. energy-consuming inner core of H-shaped steel;
7. assembling pieces; 71. a connecting plate; 711. a connecting through hole; 72. a fixing plate;
8. ear plates;
200. a first truss corbel;
300. and a second truss corbel.
Detailed Description
For a clearer understanding of the technical solutions, objects and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the invention provides an assembled prestress large-span girder structure, which comprises a truss girder 100, wherein the truss girder 100 comprises an upper chord, a lower chord 4 and a plurality of assembling units, the upper chord comprises a first supporting rod 1 and a second supporting rod 2 which are arranged in parallel and at intervals, the first supporting rod 1 and the second supporting rod 2 are respectively made of steel pipes with circular cross sections, the steel pipes are reasonable in acceptance, the sectional moments of inertia in the horizontal direction and the vertical direction are equal, the torsion resistance performance is good, the shock resistance performance is good, the first supporting rod 1 is connected with the second supporting rod 2 through a connecting piece, and the relative positions of the first supporting rod 1 and the second supporting rod 2 are fixed through the connecting piece, so that the first supporting rod 1 and the second supporting rod 2 are always parallel to each other; the lower chord member 4 is arranged below the upper chord member and is positioned between the first supporting rod 1 and the second supporting rod 2, and the lower chord member 4 is arranged in parallel with the upper chord member, namely, the lower chord member 4, the first supporting rod 1 and the second supporting rod 2 are distributed in parallel in space, preferably, the axes of the lower chord member 4, the first supporting rod 1 and the second supporting rod 2 are respectively positioned at three side edges of the regular triangular prism; each group of unit sets up in proper order between upper chord member and lower chord member 4, concretely, the unit of group includes a plurality of web members 5, the lower extreme of a plurality of web members 5 is adjacent to setting up and articulated with lower chord member 4, the upper end of a portion web member 5 articulates with first branch 1, the upper end of another portion web member 5 articulates with second branch 2, and each web member 5 interval setting on connecting first branch 1, it is preferable that the unit of group includes four web members 5, four web members 5 two liang symmetry sets up, and two web members 5 of symmetry setting are handed over with first branch 1, another is articulated with second branch 2, so that the atress of first branch 1 and second branch 2 is balanced.
It should be noted that the number of web members 5 of the assembly unit may be set according to practical requirements, and is preferably an even number, for example, 6 or 8, so that the number of web members 5 connected to the first strut 1 and the second strut 2 is the same, and the forces of the first strut 1 and the second strut 2 are balanced.
Further, as shown in fig. 3, the angle between the web member 5 and the lower chord member 4 is 60 °, that is, the adjacent two web members 5 and the upper chord member or the lower chord member 4 enclose to form an equilateral triangle, so that the stability of the assembled prestress long span beam structure can be effectively ensured, and of course, the angle between the web member 5 and the lower chord member 4 may be other angles, for example, 30 ° or 45 °, which will not be described herein.
According to the assembled pre-stress large-span beam structure, the web member 5 is hinged with the upper chord member and the lower chord member 4, so that the assembled pre-stress large-span beam structure can be assembled on site according to the use requirement, the construction is convenient and quick, the cost is reduced, the space is small, meanwhile, the hinge joint is adopted, the fact that the axis of the web member 5 is not affected by bending moment can be guaranteed, the structure is simple, the stress is reasonable, the environment-friendly construction is realized, and the maintenance is convenient.
In one embodiment of the present invention, each web member 5 connected to the two ends of the lower chord member 4 and the middle assembly unit is a buckling restrained brace 6, as shown in fig. 4 and 5, the buckling restrained brace 6 includes a sleeve 61 and an H-shaped steel energy-dissipating core 63 disposed in the sleeve 61, and concrete 62 is filled between the sleeve 61 and the H-shaped steel energy-dissipating core 63, the sleeve 61 is made of a steel pipe with a circular cross section, the H-shaped steel energy-dissipating core 63 extends along the axial direction of the sleeve 61, that is, the buckling restrained brace 6 is used to replace the web member 5 at the two ends and the middle of the assembled prestressed long-span girder structure, so that the buckling restrained brace 6 not only can effectively dissipate energy to enhance the large-vibration and shock resistance of the girder structure, but also can optimize the cross section and further save space, so that the assembled prestressed long-span girder structure has higher space flexibility.
It should be noted that, according to the actual use strength requirement of the assembled prestressed long-span beam structure, the web members 5 of the assembly units at other positions may be replaced by buckling-restrained brace 6, but the assembly units need to be replaced in pairs and symmetrically arranged.
Further, in order to facilitate connection between the web member 5 or the buckling restrained brace 6 and the upper chord member and the lower chord member 4, as shown in fig. 1, a plurality of lug plates 8 are respectively arranged on the first supporting rod 1, the second supporting rod 2 and the lower chord member 4, two ends of the web member 5 and two ends of the buckling restrained brace 6 are provided with assembling pieces 7 which can be hinged with the lug plates 8, the web member 5 or the buckling restrained brace 6 is hinged with the lug plates 8 through the assembling pieces 7, the web member 5 or the buckling restrained brace 6 is connected with the upper chord member and the lower chord member 4, and the assembling pieces 7 are arranged with the lug plates 8, so that connection between the web member 5 or the buckling restrained brace 6 and the upper chord member and the lower chord member 4 is simple and convenient, and operation of the assembled prestress large-span girder structure is simple and convenient, time-saving and labor-saving.
Further, as shown in fig. 1 and 4, the assembly member 7 includes at least two parallel connection plates 71 disposed at intervals, the end portions of the connection plates 71 are semicircular so as to rotate around the ear plate 8, the ear plate 8 can be inserted between the two connection plates 71, the two connection plates 71 can rotate relative to the ear plate 8, ear plate through holes (not shown in the drawing) are formed in the ear plate 8, connection through holes 711 corresponding to the ear plate through holes are formed in the connection plates 71, and the connection plates 71 are connected with the ear plate 8 by screwing bolts (not shown in the drawing) through the two connection through holes 711 and the ear plate through holes with nuts (not shown in the drawing), wherein the bolts adopt high-strength bolts so as to improve the connection strength of the connection positions.
Of course, the connecting pins can be inserted into the two connecting through holes 711 and the lug through holes, and the connecting pins are in interference fit with the two connecting through holes 711 and the lug through holes, so that the connecting pins cannot be loosened in the use process, and the reliability of the connection of the assembling piece 7 and the lug 8 is ensured.
Still further, because the cross sections of the web member 5 and the buckling restrained brace 6 are circular, the contact area between the connecting plate 71 and the web member 5 or the buckling restrained brace 6 is less, and the connection operation is inconvenient, in order to facilitate the connection between the connecting plate 71 and the web member 5 or the buckling restrained brace 6, the assembly member 7 further comprises fixing plates 72 connected to both ends of the web member 5 and both ends of the buckling restrained brace 6, the connecting plate 71 is connected to the fixing plates 72, that is, the connecting plate 71 is connected to the end face of the web member 5 or the buckling restrained brace 6 through the fixing plates 72, specifically, the fixing plates 72 are welded to both ends of the web member 5 and both ends of the sleeve 61 respectively, and the connecting plate 71 is welded to the fixing plates 72, so that the contact area between the connecting plate 71 and the web member 5 or the buckling restrained brace 6 can be increased, the connection reliability is improved, and the connection operation between the connecting plate 71 and the web member 5 or the buckling restrained brace 6 is simple and convenient.
In one embodiment of the present invention, as shown in fig. 1, the connecting members are a plurality of connecting rods 3, the structure of the connecting rods 3 is the same as that of the web member 5, that is, two ends of each connecting rod 3 are also provided with a connecting piece 7, and the connecting rods 3 are connected with the first supporting rod 1 and the second supporting rod 2 through the connecting pieces 7, so that the assembly operation of the assembled prestress long-span beam structure is simple and convenient, and the adjacent connecting rods 3 have an included angle of more than 0 ° and less than 180 °, that is, the adjacent connecting rods 3 are not parallel to each other, so as to ensure that the relative position relationship between the first supporting rod 1 and the second supporting rod 2 is unchanged, preferably, the included angle between the adjacent connecting rods 3 is 60 °, that is, the adjacent connecting rods 3 are enclosed with the first supporting rod 1 or the second supporting rod 2 to form an equilateral triangle, so as to effectively ensure the stability of connecting rods 3 connecting the first supporting rod 1 and the second supporting rod 2.
The connecting rod 3 and web member 5 of the present invention have substantially the same structure as the buckling restrained brace 6, and the buckling restrained brace 6 is different only in that the inside of the buckling restrained brace 6 has concrete 62 in which an energy-consuming H-steel core 63 is buried.
In one embodiment of the present invention, as shown in fig. 6, since the lower chord 4 is generally stressed more, in order to improve the stress performance of the lower chord 4, the lower chord 4 is filled with non-shrinkage concrete 41, at least one prestressed steel strand 42 is embedded in the non-shrinkage concrete 41, and the prestressed steel strand 42 applies pre-compression to the lower chord 4 in advance to resist the tension of the lower chord 4, thereby enhancing and optimizing the stress performance of the lower chord 4; preferably, four prestressed steel strands 42 are buried in the non-shrinkage concrete 41, and a plurality of spaced and parallel lining plates (not shown) are provided in the non-shrinkage concrete 41, the four prestressed steel strands 42 penetrate the lining plates, and the relative positional relationship of the four prestressed steel strands 42 is limited by the lining plates, so that each prestressed steel strand 42 can exert a pre-compression force on the lower chord 4.
Of course, in actual use, the number of the prestressed steel strands 42 embedded in the non-shrinkage concrete 41 can be adjusted according to the requirement of the use strength of the fabricated prestressed large-span beam structure, and it should be noted that when the number of the prestressed steel strands is greater than 1, a lining plate needs to be provided to limit the relative positional relationship of the prestressed steel strands 42.
In one embodiment of the present invention, as shown in fig. 7, a first truss strut 200 is connected to the first strut 1, a second truss strut 300 is connected to the second strut 2, the structure of the first truss strut 200 and the structure of the second truss strut 300 are the same as those of the truss beam 100, the second strut 2 of the first truss strut 200 and the second strut 2 of the second truss strut 300 are the same, the lower chord 4 of the first truss strut 200 is the first strut 1 of the truss beam 100, and the lower chord 4 of the second truss strut 300 is the second strut 2 of the truss beam 100, so as to form a double-layer and larger-sized assembled pre-stressed large-span beam structure.
In summary, the assembled prestress large-span beam structure provided by the invention is hinged with the web member, the upper chord member and the lower chord member, so that the assembled prestress large-span beam structure can be prefabricated in a factory and assembled in a site according to the use requirement, the construction is convenient and quick, the cost is reduced, the space volume is small, meanwhile, the hinge joint is adopted, the axle center of the web member is prevented from being affected by bending moment, the stress is reasonable, the assembly technology, the BRB (buckling restrained brace) technology and the prestress technology are comprehensively applied, the steel consumption of the section is reduced, the earthquake resistance is improved, the green construction is realized, and the maintenance is convenient;
according to the assembled pre-stress large-span beam structure, buckling-restrained supporting rods are adopted to replace web members at two ends and a midspan unit of the assembled pre-stress large-span beam structure, so that the buckling-restrained supporting rods can effectively consume energy to enhance the large-vibration anti-vibration stability of the beam structure, strengthen the bending resistance, improve the anti-vibration performance, optimize the section and further save the space, and the assembled pre-stress large-span beam structure has higher space flexibility;
the assembled prestress large-span beam structure has the advantages that the upper chord member, the lower chord member and the web members are all round steel pipes, the steel pipes are reasonable in acceptance, the section moments of inertia in the horizontal direction and the vertical direction are equal, the torsion resistance is good, and the earthquake resistance is good;
the assembled prestress large-span beam structure of the invention can realize batch production of all parts by factories, so that the on-site assembly operation is simple and convenient,
according to the assembled pre-stress large-span beam structure, pre-stress is applied to the lower chord member in advance through the pre-stress steel stranded wires, so that the tension effect of the lower chord member is resisted, and the stress performance of the lower chord member is enhanced and optimized.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention. It should be noted that, the components of the present invention are not limited to the above-mentioned overall application, and each technical feature described in the specification of the present invention may be selected to be used singly or in combination according to actual needs, so that other combinations and specific applications related to the present invention are naturally covered by the present invention.
Claims (8)
1. The utility model provides an assembled prestressing force large-span beam structure, its characterized in that, assembled prestressing force large-span beam structure includes the truss girder, the truss girder includes:
the upper chord comprises a first supporting rod and a second supporting rod which are parallel and are arranged at intervals, and the first supporting rod is connected with the second supporting rod through a connecting piece;
the lower chord is arranged below the upper chord and between the first supporting rod and the second supporting rod, and the lower chord is arranged in parallel with the upper chord;
the plurality of assembly units comprise a plurality of web members, the lower ends of the web members are adjacently arranged and hinged with the lower chord members, one part of the web members are hinged with the first supporting rods, the other part of the web members are hinged with the second supporting rods, the web members connected to the first supporting rods are arranged at intervals, and the web members connected to the first supporting rods are arranged at intervals;
each web member of the assembly unit connected to two ends and the middle of the lower chord member is a buckling-restrained brace, the buckling-restrained brace comprises a sleeve and an H-shaped steel energy-dissipation inner core arranged in the sleeve, and concrete is filled between the sleeve and the H-shaped steel energy-dissipation inner core; the lower chord member is internally filled with non-shrinkage concrete, and at least one prestress steel strand is embedded in the non-shrinkage concrete.
2. The fabricated prestressed large span girder structure according to claim 1, wherein,
the first support rod, the second support rod and the lower chord member are respectively provided with a plurality of ear plates, and both ends of the web member and both ends of the buckling-restrained brace are respectively provided with an assembling piece capable of being hinged with the ear plates.
3. The fabricated prestressed large span girder structure according to claim 2, wherein,
the assembly part at least comprises two parallel connecting plates which are arranged at intervals, the lug plate can be inserted between the two connecting plates, a lug plate through hole is formed in the lug plate, a connecting through hole corresponding to the lug plate through hole is formed in the connecting plate, the connecting through hole and the lug plate through hole are screwed with a nut through bolts, and the connecting plate is connected with the lug plate.
4. The fabricated prestressed large-span girder structure according to claim 3, wherein,
the assembly piece further comprises fixing plates connected to two ends of the web member and two ends of the buckling-restrained supporting rods, and the connecting plates are connected to the fixing plates.
5. The fabricated prestressed large span girder structure according to claim 1, wherein,
the connecting piece is a plurality of connecting rods, the structure of the connecting rods is the same as that of the web members, and an included angle which is larger than 0 DEG and smaller than 180 DEG is formed between every two adjacent connecting rods.
6. The fabricated prestressed large-span girder structure of claim 5, wherein,
the included angle between two adjacent connecting rods is 60 degrees.
7. The fabricated prestressed large span girder structure according to claim 1, wherein,
the angle formed between the web member and the lower chord member is 60 degrees.
8. The fabricated prestressed large-span girder structure according to any one of claims 1 to 7,
the truss girder structure comprises a truss girder and is characterized in that a first truss girder is connected to a first supporting rod, a second truss girder is connected to a second supporting rod, the structure of the first truss girder and the structure of the second truss girder are identical to those of the truss girder, the second supporting rod of the first truss girder and the second supporting rod of the second truss girder are identical, the lower chord member of the first truss girder is the first supporting rod of the truss girder, and the lower chord member of the second truss girder is the second supporting rod of the truss girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442186.0A CN109356292B (en) | 2018-11-29 | 2018-11-29 | Assembled prestressing force large-span beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442186.0A CN109356292B (en) | 2018-11-29 | 2018-11-29 | Assembled prestressing force large-span beam structure |
Publications (2)
| Publication Number | Publication Date |
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| CN109356292A CN109356292A (en) | 2019-02-19 |
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| CN111411573B (en) * | 2019-12-31 | 2021-11-19 | 中国船舶重工集团应急预警与救援装备股份有限公司 | Height-adjustable's pin-connected panel pontoon bridge cross-span steel tower |
| CN112722232B (en) * | 2020-12-14 | 2022-04-26 | 西安康本材料有限公司 | Triangular-section arc-shaped composite material truss and preparation method thereof |
| CN114541585B (en) * | 2022-02-25 | 2023-08-25 | 广西甫筑置业有限公司 | Truss structure design method based on large-space multi-layer building |
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| KR101065633B1 (en) * | 2010-10-05 | 2011-09-20 | 대명건설(주) | Prestressed steel tubular truss beam by external prestressing method |
| CN209194719U (en) * | 2018-11-29 | 2019-08-02 | 中冶京诚工程技术有限公司 | Prefabricated PC long-span beams structure |
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| WO1998040579A1 (en) * | 1997-03-11 | 1998-09-17 | Haesler Peter | Lattice girder |
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