CN111058569B - Multi-steel-beam and concrete combined super-flat beam and construction method of flat beam - Google Patents
Multi-steel-beam and concrete combined super-flat beam and construction method of flat beam Download PDFInfo
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- CN111058569B CN111058569B CN201911376517.XA CN201911376517A CN111058569B CN 111058569 B CN111058569 B CN 111058569B CN 201911376517 A CN201911376517 A CN 201911376517A CN 111058569 B CN111058569 B CN 111058569B
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- 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
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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Abstract
The invention discloses a multi-steel-beam-concrete combined super-flat beam which comprises a steel reinforcement cage, wherein one or more main steel beams which are parallel and opposite are connected in the steel reinforcement cage, two rows of reserved holes are formed in each main steel beam, the combined super-flat beam also comprises a plurality of angle steels, each angle steel penetrates through the reserved holes to be connected with the main steel beams, a secondary steel beam is connected between the two rows of angle steels, and concrete is poured on a formwork outside the steel reinforcement cage to form the multi-steel-beam-concrete combined super-flat beam; the method has the advantages of excellent stress performance, strong earthquake energy consumption capability and simple and convenient construction, and is suitable for large-span structures. The construction method of the multi-steel-beam and concrete combined super-flat beam is simple and convenient to construct.
Description
Technical Field
The invention belongs to the technical field of building structures, and particularly relates to a multi-steel-beam and concrete combined super-flat beam and a construction method of the multi-steel-beam and concrete combined super-flat beam.
Background
A flat beam is a beam having a width greater than or equal to the height of the beam. The combined structure can enable the member to have good earthquake energy consumption capacity by combining the steel structure and the concrete structure, and can further reduce the size of the member, and the combined flat beam is a structural form applying the combined structure to the flat beam. The existing combined flat beam is mainly formed by combining a single steel beam and reinforced concrete, but the steel distribution rate of the existing combined flat beam is low due to the large width of the flat beam, so that the advantage of a combined structure cannot be well exerted. In addition, the demand of the current practical engineering on the large-span large-volume low-net-height combined member is increased, and the defects of complex construction and long construction period exist in the current combined super-flat beam suitable for the working condition.
Disclosure of Invention
The invention aims to provide a multi-steel-beam and concrete combined super-flat beam which can improve the shock resistance through deformation coordination and is suitable for a large-span structure.
The invention also aims to provide a construction method of the multi-steel-beam and concrete combined super-flat beam.
The technical scheme includes that the multi-steel-beam-concrete combined super-flat beam comprises a steel reinforcement cage, one or more main steel beams which are parallel and opposite are connected in the steel reinforcement cage, two rows of reserved holes are formed in each main steel beam, the multi-steel-beam-concrete combined super-flat beam also comprises a plurality of angle steels, each angle steel penetrates through the reserved holes to be connected with the plurality of main steel beams, a secondary steel beam is connected between the two rows of angle steels, and concrete is filled in the steel reinforcement cage.
The invention is also characterized in that:
the central lines of the two rows of the reserved holes are positioned at the position which is not higher than the section and the shaft of the main steel beam.
Each preformed hole is semicircular, the linear edges of the two rows of preformed holes are aligned, the openings of the two rows of angle steels are opposite, and the two edges of each angle steel are in contact connection with the linear edges of the preformed holes.
The maximum distance between the angle steel vertex angle and the arc edge of the preformed hole is not more than 5 mm.
The reinforcement cage includes the stirrup of a plurality of parallel arrangement and the muscle of indulging of a plurality of perpendicular stirrup directions, and the stirrup uses steel strand wires ligature connection with indulging the muscle.
When the distance between two adjacent main steel beam webs is larger than or equal to 600mm, at least one auxiliary steel beam is connected between angle steels between the two adjacent main steel beams.
The distance between the two ends of each angle steel and the reinforcement cage is not less than 15 mm.
Each main steel beam is an I-beam.
The invention adopts another technical scheme that the construction method of the multi-steel-beam concrete combined super-flat beam is implemented according to the following steps:
and 6, erecting a formwork outside the flat beam framework, pouring concrete, and removing an external template after the concrete is solidified to form the multi-steel-beam-concrete combined super-flat beam.
The invention has the beneficial effects that:
according to the multi-steel-beam and concrete combined super-flat beam, a combined structure suitable for a large-span structure is formed through the design of the angle steel, the main section steel beam and the auxiliary section steel beam, and the combined structure consisting of the angle steel and the concrete is arranged in the reserved hole, so that the rigidity of the main section steel beam is enhanced, and further, the rigidity of the flat beam is improved; each group of angle steels are welded and connected with the secondary section steel beam, so that the secondary section steel beam and the main section steel beam can keep good integrity, deformation coordination is realized, and the shock resistance of the flat beam is improved; the steel plate has the advantages of excellent stress performance, strong earthquake energy consumption capability and simple and convenient construction.
The construction method of the multi-steel-beam and concrete combined super-flat beam is simple and convenient to construct.
Drawings
FIG. 1 is a schematic view of a skeleton structure of a multi-steel-beam concrete combined super flat beam according to the present invention;
FIG. 2 is a side view of a multi-beam concrete composite super-flat beam of the present invention;
FIG. 3 is a schematic structural view of a multi-steel beam-concrete composite super flat beam of the present invention without a reinforcement cage;
FIG. 4 is a side view of a multi-beam-concrete composite super flat beam of the present invention without a reinforcement cage;
fig. 5 is a schematic structural view of a main section steel beam in the multi-steel-beam-concrete combined super flat beam of the present invention.
In the figure, 1 is a main section steel beam, 2 is angle steel, 3 is a slave section steel beam, 4 is a longitudinal bar, 5 is a stirrup, 6 is a reserved hole, and 7 is concrete.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a multi-steel-beam-concrete combined super-flat beam, which comprises a reinforcement cage, wherein one or more main section steel beams 1 which are parallel and opposite are arranged in the reinforcement cage, each main section steel beam 1 is provided with two rows of preformed holes 6, the multi-steel-beam-concrete combined super-flat beam also comprises a plurality of angle steels 2, each angle steel 2 penetrates through the preformed holes 6 to be connected with the plurality of main section steel beams 1, a slave section steel beam 3 is connected between the two rows of angle steels 2, and concrete 7 is filled in the reinforcement cage.
As shown in fig. 4, the center lines of the two rows of prepared holes 6 are at a position not higher than the section and the axis of the main section steel beam 1.
As shown in fig. 5, each preformed hole 6 is semicircular, the linear edges of the two rows of preformed holes 6 are aligned, the openings of the two rows of angle steels 2 are opposite, and two edges of each angle steel 2 are in contact connection with the linear edges of the preformed holes 6.
The maximum distance between the top angle of the angle steel 2 and the arc edge of the preformed hole 6 is not more than 5mm, so that the angle steel 2 can be conveniently installed.
The steel reinforcement cage includes the vertical muscle 4 of 5 directions of a plurality of parallel arrangement's stirrup 5 and a plurality of perpendicular stirrup, and stirrup 5 uses the steel strand wires ligature with vertical muscle 4 to be connected.
The utility model provides a many girder steels-super flat beam of concrete combination can be used to large-span structure, and when the distance between the web of two adjacent main shaped steel roof beams 1 was more than or equal to 600mm, then connect at least one from shaped steel roof beam 3 between the angle steel 2 between these two adjacent main shaped steel roof beams 1, can guarantee that this application flat beam still has good anti-seismic performance when the cross-section width is great like this.
The distance between the two ends of each angle steel 2 and the reinforcement cage is not less than 15mm, so that the distance between each angle steel 2 and the reinforcement cage can be effectively ensured to be filled with concrete materials, and the bonding between the concrete materials and steel materials is further ensured.
Each main steel beam 1 is an I-beam, and construction is facilitated.
The working principle of the multi-steel-beam and concrete combined super-flat beam is as follows:
after the semicircular preformed holes 6 are filled with concrete, the angle steel 2 and the concrete form a combined structure in the semicircular preformed holes 6, so that the rigidity of the main type steel beam 1 can be effectively improved, and further the rigidity of the multi-steel beam-concrete combined super flat beam is improved; two rows of angle steels 2 with opposite openings are used as a group, the center line deviation of two rows of preformed holes 6 is used as a bottom, each group of angle steels 2 is welded with a secondary section steel beam 3, the secondary section steel beam 3 and a main section steel beam 1 can keep good integrity during earthquake action, and deformation coordination is realized.
A construction method of a multi-steel-beam and concrete combined super-flat beam is implemented according to the following steps:
and 6, erecting a formwork outside the flat beam framework, pouring concrete, and removing an external template after the concrete is solidified to form the multi-steel-beam-concrete combined super-flat beam.
Through the mode, the multi-steel-beam and concrete combined super-flat beam has the advantages that the rigidity of the main section steel beam in use is enhanced through the combined structure formed by the design of the angle steel, the main section steel beam and the auxiliary section steel beam, and further the rigidity of the flat beam is improved; each group of angle steels are welded and connected with the secondary section steel beam, so that the secondary section steel beam and the main section steel beam can keep good integrity, deformation coordination is realized, and the shock resistance of the flat beam is improved; the method also has the advantages of excellent stress performance, strong earthquake energy consumption capability and simple and convenient construction, and is suitable for large-span structures. The construction method of the multi-steel-beam and concrete combined super-flat beam is simple and convenient to construct.
Claims (6)
1. The multi-steel-beam and concrete combined super-flat beam is characterized by comprising a steel reinforcement cage, wherein one or more main section steel beams (1) which are parallel and opposite are arranged in the steel reinforcement cage, each main section steel beam (1) is provided with two rows of preformed holes (6), the multi-steel-beam and concrete combined super-flat beam also comprises a plurality of angle steels (2), each angle steel (2) penetrates through the preformed hole (6) to be connected with the main section steel beam (1), a secondary section steel beam (3) is connected between the two rows of angle steels (2), and concrete (7) is filled in the steel reinforcement cage;
the central lines of the two rows of the preformed holes (6) are positioned at the position which is not higher than the section neutral axis of the main section steel beam (1);
each preformed hole (6) is semicircular, the linear edges of the two rows of preformed holes (6) are aligned, the openings of the two rows of angle steels (2) are opposite, and two edges of each angle steel (2) are in contact connection with the linear edges of the preformed holes (6);
when the distance between the webs of the two adjacent main section steel beams (1) is larger than or equal to 600mm, at least one auxiliary section steel beam (3) is connected between the angle steels (2) between the two adjacent main section steel beams (1).
2. A multi-steel-beam-concrete combined super flat beam according to claim 1, characterized in that the maximum distance between the top angle of the angle steel (2) and the circular arc edge of the prepared hole (6) is not more than 5 mm.
3. The multi-steel-beam-concrete combined super-flat beam as claimed in claim 1, wherein the reinforcement cage comprises a plurality of parallel stirrups (5) and a plurality of longitudinal reinforcements (4) perpendicular to the stirrups (5), and the stirrups (5) and the longitudinal reinforcements (4) are connected by binding steel strands.
4. A multi-steel-beam-concrete combined super flat beam according to claim 1, characterized in that the distance between the two ends of each angle steel (2) and a reinforcement cage is not less than 15 mm.
5. A multi-beam-concrete composite super flat beam according to claim 1, characterised in that each of said main section beams (1) is an i-beam.
6. A construction method of a multi-steel-beam and concrete combined super-flat beam is characterized by comprising the following steps:
step 1, taking one or more same main section steel beams (1), forming two rows of preformed holes (6) at the same position on each main section steel beam (1), and placing the main section steel beams (1) in parallel and in alignment;
step 1, the preformed holes (6) are semicircular holes, the linear edges of the two rows of preformed holes (6) are aligned, the openings of the two rows of angle steels (2) are opposite, and each angle steel (2) is fixedly connected in each preformed hole (6);
step 2, sequentially enabling each angle steel (2) to penetrate through the main section steel beam (1) through the preformed holes (6) located on the same straight line;
step 3, connecting secondary section steel beams (3) between the two rows of angle steels (2);
step 4, welding the main section steel beam (1) and the angle steel (2) in sequence, and welding the angle steel (2) and the auxiliary section steel beam (3);
step 5, erecting a reinforcement cage consisting of longitudinal bars (4) and stirrups (5) at the outer sides of the main section steel beam (1) and the auxiliary section steel beam (3) to form a flat beam framework;
and 6, erecting a formwork outside the flat beam framework, pouring concrete, and removing an external template after the concrete is solidified to form the multi-steel-beam-concrete combined super-flat beam.
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| CN201911376517.XA CN111058569B (en) | 2019-12-27 | 2019-12-27 | Multi-steel-beam and concrete combined super-flat beam and construction method of flat beam |
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| CN201911376517.XA CN111058569B (en) | 2019-12-27 | 2019-12-27 | Multi-steel-beam and concrete combined super-flat beam and construction method of flat beam |
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| CN111058569A CN111058569A (en) | 2020-04-24 |
| CN111058569B true CN111058569B (en) | 2021-09-10 |
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| CN111827578B (en) * | 2020-07-15 | 2022-01-14 | 浙江恒昌建设有限公司 | High-strength beam structure and construction method thereof |
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