CN112942681A - Assembled truss concrete beam capable of being quickly replaced after earthquake - Google Patents
Assembled truss concrete beam capable of being quickly replaced after earthquake Download PDFInfo
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- CN112942681A CN112942681A CN202110275898.3A CN202110275898A CN112942681A CN 112942681 A CN112942681 A CN 112942681A CN 202110275898 A CN202110275898 A CN 202110275898A CN 112942681 A CN112942681 A CN 112942681A
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- 239000004567 concrete Substances 0.000 title claims abstract description 91
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 24
- 238000004873 anchoring Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5812—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form
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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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an assembled truss concrete beam capable of being quickly replaced after an earthquake, and belongs to the field of buildings. The energy dissipation device comprises a common concrete beam section of a prefabricated truss, a replaceable steel beam section and an energy dissipation damper. The common concrete beam section of the prefabricated truss consists of an upper concrete beam and a lower space truss; the replaceable steel beam section is screwed into the embedded threaded sleeve through a screw to be connected with the concrete column and the common concrete beam section of the prefabricated truss; and two ends of the energy dissipation damper are inserted into the holes formed in the lug plates through pin shafts and connected with the concrete columns and the common concrete beam sections of the prefabricated trusses. During normal use, the lower chord of the truss in the lower space is pulled, and the concrete beam in the upper space is pressed, so that the cracking degree of the concrete can be reduced. Under the action of an earthquake, the replaceable steel beam section and the energy dissipation damper dissipate earthquake energy through plastic deformation, so that the elastic working state of the common concrete beam section of the prefabricated truss is ensured. After the earthquake is finished, the replaceable steel beam section and the energy dissipation damper are replaced, and the structure can be quickly repaired. Meanwhile, the assembled truss concrete beam is convenient to install, construction progress is accelerated, and good economic benefits are achieved.
Description
Technical Field
The invention relates to the field of buildings, in particular to an assembled truss concrete beam capable of being quickly replaced after an earthquake.
Background
Earthquake is one of the most serious natural disasters faced by human beings at present, and has strong randomness and wide-range spread. In recent years, earthquakes frequently occur, and the destruction and collapse of building structures caused by earthquakes not only bring about huge casualties, but also cause property loss which is difficult to estimate. The traditional earthquake resistance mainly depends on the deformation of a building component to resist earthquake acting force and dissipate earthquake energy, although a large number of buildings do not collapse after the earthquake, the structural component is damaged by the accumulation of plastic deformation, and simultaneously, the earthquake resistance of the structure in the subsequent earthquake can be obviously reduced, so that the structure is difficult to repair or the repair cost is too high after the earthquake, and the structure is forced to be dismantled, thereby bringing about great economic loss.
In addition, in recent years, the national policy of promoting the building industrialization is required after being released many times, the assembly type building is gradually popularized under the guidance and suggestion of the national policy, and as can be seen from the guidance suggestion about the vigorous development of the assembly type building released from the national institute, the country has vigorously promoted the development of the assembly type building, and the assembly type building industrialization and industrialization tend to be great. Because the traditional cast-in-place structure needs complicated processes of in-situ formwork erecting, reinforcing steel bar binding, concrete pouring and the like, the construction efficiency is low, the construction period is long, and the technical level of in-situ construction workers is uneven, so that the construction quality is difficult to ensure. Therefore, the traditional cast-in-place construction mode is fundamentally changed, and the construction efficiency, the construction period and the construction quality can be improved through the construction modes of factory prefabrication and field installation.
Meanwhile, in the traditional reinforced concrete structure in engineering, the tensile strength of concrete is low, so that the concrete in a tension area is easy to crack, and the appearance and the durability of the concrete structure are both adversely affected by cracks generated by cracking.
Against this background, there is an urgent need to develop an assembly type structural system with replaceable components, which weakens a certain part of the structure or sets a ductile energy-consuming component, and makes the component have a replaceable characteristic by connecting a device convenient to disassemble into a main structure; the assembled structural system dissipates seismic energy by concentrating plastic deformation on the replaceable component under the action of an earthquake, protects other parts of the structure from being damaged due to the fact that the other parts of the structure are in an elastic working state, and can realize quick recovery of structural functions by replacing energy-consuming components after the earthquake. Meanwhile, steel with strong tensile strength can be used for replacing the concrete in the tension area, so that the steel at the lower part is tensioned, the concrete at the upper part is compressed, and the material characteristics of the steel and the concrete are fully exerted, thereby slowing down the cracking degree of the concrete in the engineering. And the traditional cast-in-place mode is replaced by a construction mode of factory prefabrication and field installation, so that the construction progress can be accelerated.
Disclosure of Invention
In view of the above, the present invention provides an assembled truss concrete beam capable of being quickly replaced after an earthquake, so as to solve the technical problems that the structure is difficult to repair after the earthquake and the concrete is easy to crack.
The invention adopts the following technical scheme:
the invention provides an assembled truss concrete beam capable of being quickly replaced after an earthquake.
The common concrete beam section of the precast truss comprises an upper concrete beam and a lower space truss.
The anchoring assemblies are embedded at two ends of the upper concrete beam and comprise a conversion steel plate, an embedded threaded sleeve and an anchoring steel bar, the anchoring steel bar with threads is screwed into the embedded threaded sleeve, and the embedded threaded sleeve is further welded on the conversion steel plate; and the conversion steel plate is provided with bolt holes corresponding to the positions of the threaded sleeves.
The lower space truss is formed by welding round steel pipes; two lower chord steel plates are welded at two ends of the lower chord of the lower space truss, and further, the ear plates are welded on the lower chord steel plates; two ends of the upper chord of the lower space truss are welded on a conversion steel plate in the anchoring component; furthermore, the lower space truss is pre-embedded in the upper concrete beam.
The replaceable steel beam section comprises a dog-bone steel beam and two end plates; the two end plates are welded on the dog-bone steel beam, and bolt holes corresponding to the positions of the threaded sleeves are formed in the end plates.
The energy dissipation damper can be a buckling restrained brace damper, a bending damper and the like; both ends of the energy dissipation damper are provided with ear plates.
The replaceable steel beam section is screwed into the embedded threaded sleeve through a screw to be connected with the concrete column and the common concrete beam section of the prefabricated truss.
And two ends of the energy dissipation damper are inserted into holes formed in the lug plates through pin shafts and connected with the concrete columns and the common concrete beam sections of the prefabricated trusses.
The assembled truss concrete beam with the quickly replaceable structure after the earthquake has obvious technical effects, and solves the technical problems that the structure is difficult to repair after the earthquake, the concrete is easy to crack and the like. After the earthquake is finished, the plastic hinge area steel beam and the energy dissipation damper which generate large deformation are replaced, and the replacement process of the connecting node is simple and rapid. Meanwhile, the precast truss concrete beam can reduce the cracking degree of concrete by utilizing the tension of the lower chord member of the lower space truss and the compression of the upper concrete beam. In addition, this assembled truss concrete beam structure, the installation of being convenient for the construction progress has good economic benefits.
Drawings
FIG. 1 is a schematic view of the present invention in example 1;
FIG. 2 is a front view of the present invention in example 1;
fig. 3 is a schematic view of a section of a common concrete beam of the precast truss in example 1;
FIG. 4 is a schematic view of a middle and lower space truss according to embodiment 1;
FIG. 5 is a schematic view of an upper concrete beam end anchoring assembly in example 1;
fig. 6 is a sectional view of a section a-a of a general concrete beam of the precast truss in example 1;
FIG. 7 is a schematic view of an exchangeable steel beam in accordance with embodiment 1;
FIG. 8 is a schematic view showing the connection of replaceable steel beams according to embodiment 1;
FIG. 9 is a schematic view showing the connection of replaceable steel beams according to embodiment 3;
FIG. 10 is a schematic view of the present invention in example 2;
FIG. 11 is a schematic view showing the connection of replaceable steel beams according to embodiment 2;
FIG. 12 is a schematic view of the present invention in example 4.
In the figure: the prefabricated truss concrete beam comprises a prefabricated truss concrete beam 1, a prefabricated truss common concrete beam section 101, an upper concrete beam 1011, a lower space truss 1012, an upper concrete beam end anchoring assembly 1013, a conversion steel plate 1014, an embedded threaded sleeve 1015, an anchoring steel bar 1016, a lower chord steel plate 1017, an ear plate 1018, a replaceable steel beam section 102, a dog-bone steel beam 1021, an end plate 1022, an energy dissipation damper 103, a concrete column 2, a concrete column side wall anchoring assembly 201, a concrete column conversion steel plate 202, an embedded threaded sleeve 203, an anchoring steel bar 204 and a screw rod 3.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses an assembled truss concrete beam capable of being quickly replaced after an earthquake, which comprises a prefabricated truss common concrete beam section 101, a replaceable steel beam section 102 and an energy dissipation damper 103.
Referring to fig. 3, the precast truss ordinary concrete beam section 101 includes an upper concrete beam 1011 and a lower space truss 1012.
And anchoring assemblies 1013 are embedded at two ends of the upper concrete beam 1011.
Referring to fig. 5, the anchor assembly 1013 is composed of a conversion steel plate 1014, an embedded threaded sleeve 1015 and an anchor bar 1016, the threaded anchor bar 1016 is screwed into the embedded threaded sleeve 1015, and further, the embedded threaded sleeve 1015 is welded to the conversion steel plate 1014; the conversion steel plate 1014 is provided with bolt holes corresponding to the positions of the threaded sleeves 1015.
Referring to fig. 4, the lower space truss 1012 is welded by circular steel pipes; further, two lower chord steel plates 1017 are welded to both ends of the lower chord of the lower space truss 1012, and further, an ear plate 1018 is welded to the lower chord steel plate 1017.
Referring to fig. 3 and 6, further, the upper chord of the lower space truss 1012 is welded at both ends to transition steel plates 1014 in the anchor assemblies 1013.
Referring to fig. 3, further, lower space trusses 1012 are embedded in the upper concrete beams 1011.
Referring to fig. 7, the replaceable steel beam section 102 includes a dog bone steel beam 1021 and two end plates 1022; the two end plates 1022 are welded to the dog-bone steel beam 1021, and further, bolt holes corresponding to the positions of the threaded sleeves are formed in the end plates 1022.
The energy dissipation damper 103 can be a buckling restrained brace damper, a bending damper and the like; further, the energy dissipation damper 103 is provided with ear plates 1018 at both ends.
Referring to fig. 1, 2 and 8, an anchoring assembly 201 is embedded in the side wall of the concrete column 2; the anchoring assembly 201 consists of a concrete column conversion steel plate 202, an embedded threaded sleeve 203, anchoring steel bars 204 and lug plates 1018, the threaded anchoring steel bars 204 are screwed into the embedded threaded sleeve 203, and further, the embedded threaded sleeve 203, the lug plates 1018 and the anchoring steel bars 204 are welded on the concrete column conversion steel plate 202; and the concrete column conversion steel plate 202 is provided with bolt holes corresponding to the positions of the threaded sleeves 203.
During construction, one end of the replaceable steel beam section 102 is connected with the side wall of the concrete column 2, and the other end of the replaceable steel beam section is connected with the end part of an upper concrete beam 1011 in the common concrete beam section 101 of the precast truss; further, one end of the energy dissipation damper 103 is connected to the side wall of the concrete column 2, and the other end is connected to the lower space truss in the common concrete beam end 101 of the precast truss.
The replaceable steel beam section 102 is screwed into the embedded threaded sleeve through a screw to be connected with the concrete column and the common concrete beam section of the prefabricated truss.
And two ends of the energy dissipation damper are inserted into holes formed in the lug plates through pin shafts and connected with the concrete columns and the common concrete beam sections of the prefabricated trusses.
During normal use, the lower chords of the lower space truss 1012 are in tension and the upper concrete beams are in compression, which can slow the cracking of the concrete.
When an earthquake occurs, the replaceable steel beam section 102 transfers the plastic hinge to the position through the corresponding section design, and the earthquake energy is dissipated through the plastic deformation of the dog-bone steel beam 1021 and the energy dissipation damper 103, so that the elastic working state of the common concrete beam section 101 of the prefabricated truss is ensured, and a better earthquake-resistant effect is achieved.
After the earthquake is finished, the precast truss concrete beam 1 is firstly supported, then the replaceable steel beam section 102 and the energy dissipation damper 103 which are subjected to large plastic deformation are taken down, the precast truss common concrete beam section 101 in the elastic stage is reserved, and finally the new steel beam 102 and the energy dissipation damper 103 are replaced, so that the simple replacement of the connecting node is completed.
Example 2:
the main structure of the present embodiment is the same as embodiment 1, see fig. 10, and is suitable for a multi-span frame structure. Referring to fig. 11, the concrete center pillar 2 has anchor assemblies 201 embedded in the side walls of both sides, and further, the anchor bars 204 are welded to the anchor assemblies 201 at both ends.
Example 3:
the main structure of this embodiment is the same as that of embodiment 1, referring to fig. 9, the anchoring assembly 201 is embedded in the side wall of the concrete column 2, and further, the anchoring steel bar 204 in the anchoring assembly 201 is anchored upward.
Example 4:
the main structure of this embodiment is the same as that of embodiment 1, see fig. 12, and is suitable for the case where the shearing force of the beam end is large, and further, the energy dissipation damper 103 may be arranged as an inclined support.
Claims (3)
1. The utility model provides a but assembled truss concrete beam of quick replacement after earthquake which characterized in that: the energy dissipation device comprises a common concrete beam section (101) of a prefabricated truss, a replaceable steel beam section (102) and an energy dissipation damper (103);
the common concrete beam section (101) of the prefabricated truss comprises an upper concrete beam (1011) and a lower space truss (1012); the anchor assembly (1013) is embedded at two ends of the upper concrete beam (1011), the anchor assembly (1013) consists of a conversion steel plate (1014), an embedded threaded sleeve (1015) and an anchor steel bar (1016), the anchor steel bar (1016) with threads is screwed into the embedded threaded sleeve (1015), and the embedded threaded sleeve (1015) is welded on the conversion steel plate (1014); the lower space truss (1012) is formed by welding steel pipes, two lower chord steel plates (1017) are welded at two ends of a lower chord of the lower space truss (1012), the lug plates (1018) are welded on the lower chord steel plates (1017), and two ends of an upper chord of the lower space truss (1012) are welded on a conversion steel plate (1014) in the anchoring component (1013); the lower space truss (1012) is pre-embedded in the upper concrete beam (1011);
the replaceable steel beam section (102) comprises a dog-bone steel beam (1021) and two end plates (1022); the two end plates (1022) are welded to the dog-bone steel beam (1021);
the energy dissipation damper (103) can be a buckling restrained brace damper, a bending damper and the like; two ends of the energy dissipation damper (103) are provided with lug plates (1018).
2. The assembled truss concrete girder capable of being rapidly replaced after an earthquake according to claim 1, wherein: the replaceable steel beam section (102) is screwed into the embedded threaded sleeve through the screw (3) and is connected with the concrete column (2) and the common concrete beam section (101) of the prefabricated truss; two ends of the energy dissipation damper (103) are inserted into holes formed in the lug plates (1018) through pin shafts and connected with the concrete column (2) and the common concrete beam section (101) of the prefabricated truss.
3. Concrete column (2) according to claim 2, characterized in that: an anchoring assembly (201) is embedded in the side wall of the concrete column (2); anchor subassembly (201) comprises concrete column conversion steel sheet (202), pre-buried threaded sleeve (203), anchor reinforcing bar (204) and otic placode (1018), and threaded anchor reinforcing bar (204) twists pre-buried threaded sleeve (203), and further, pre-buried threaded sleeve (203), otic placode (1018) and anchor reinforcing bar (204) weld in concrete column conversion steel sheet (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275898.3A CN112942681A (en) | 2021-03-15 | 2021-03-15 | Assembled truss concrete beam capable of being quickly replaced after earthquake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275898.3A CN112942681A (en) | 2021-03-15 | 2021-03-15 | Assembled truss concrete beam capable of being quickly replaced after earthquake |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323488A (en) * | 2021-06-04 | 2021-08-31 | 重庆大学 | Steel pipe concrete beam column connecting joint capable of being replaced after earthquake |
| CN114457931A (en) * | 2022-03-18 | 2022-05-10 | 中南大学 | Novel self-resetting anti-seismic steel truss girder |
| CN114508174A (en) * | 2022-02-23 | 2022-05-17 | 福建工程学院 | Can replace assembled beam column node of artifical hinge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114457931A (en) * | 2022-03-18 | 2022-05-10 | 中南大学 | Novel self-resetting anti-seismic steel truss girder |
| CN114457931B (en) * | 2022-03-18 | 2022-09-23 | 中南大学 | Novel self-resetting anti-seismic steel truss girder |
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Application publication date: 20210611 |
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