CN112814150B - Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes - Google Patents
Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes Download PDFInfo
- Publication number
- CN112814150B CN112814150B CN202011621750.2A CN202011621750A CN112814150B CN 112814150 B CN112814150 B CN 112814150B CN 202011621750 A CN202011621750 A CN 202011621750A CN 112814150 B CN112814150 B CN 112814150B
- Authority
- CN
- China
- Prior art keywords
- rectangular steel
- steel sleeve
- precast
- magnesium sulfate
- basic magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 132
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 124
- 239000010959 steel Substances 0.000 title claims abstract description 124
- 229910052943 magnesium sulfate Inorganic materials 0.000 title claims abstract description 66
- 235000019341 magnesium sulphate Nutrition 0.000 title claims abstract description 66
- 239000004568 cement Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002787 reinforcement Effects 0.000 claims abstract description 58
- 238000003466 welding Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 230000035939 shock Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000411 inducer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052564 epsomite Inorganic materials 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical group O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 1
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- UCTBFMAIZBVLGO-UHFFFAOYSA-L trimagnesium oxygen(2-) sulfate Chemical compound [Mg+2].[O-2].[Mg+2].S(=O)(=O)([O-])[O-].[Mg+2] UCTBFMAIZBVLGO-UHFFFAOYSA-L 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- 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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a rectangular steel sleeve type connection method of an assembled frame node of basic magnesium sulfate cement concrete, which comprises the following steps: firstly, respectively pouring a precast beam and a precast column; in the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing; in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement; step two, after the prefabricated column is in place, a temporary supporting system is arranged, and the prefabricated beam is placed on the temporary supporting system; the rectangular steel sleeve is a tubular sleeve with a rectangular section; the side wall of the rectangular steel sleeve is a plane or a corrugated surface; sleeving the main reinforcement of the precast column by using a rectangular steel sleeve, connecting the main reinforcement of the precast beam with the outer side of the rectangular steel sleeve at the moment, and welding the main reinforcement of the precast beam and the rectangular steel sleeve; thirdly, post-pouring basic magnesium sulfate cement concrete pouring materials in a node core area between the precast columns and the precast beams; the basic magnesium sulfate cement concrete pouring material is a pouring material taking basic magnesium sulfate as a matrix. The invention has the advantages of reliable construction, good shock resistance and the like.
Description
Technical Field
The invention belongs to the field of constructional engineering, relates to a connecting method of fabricated concrete frame nodes, and particularly relates to a rectangular steel sleeve type connecting method of basic magnesium sulfate cement concrete fabricated frame nodes.
Background
The fabricated frame is a frame structure building which is formed by processing and manufacturing prefabricated columns, beams, plates and other components and accessories in a factory, transporting the prefabricated columns, beams, plates and other components to a construction site and assembling and installing the prefabricated columns, beams, plates and other components and accessories on the site in a reliable connection mode. Wherein the beam column node is an important factor influencing the seismic performance of the fabricated frame structure.
At present, the connection modes of the nodes are mainly divided into a wet connection mode and a dry connection mode, and an assembled integral node in the wet connection mode is a node form which is most widely applied in China at present. The post-cast concrete in the node area used at the present stage mainly comprises common portland concrete, and the properties such as ductility and the bonding force between new and old concrete are difficult to ensure aiming at the node casting of Basic Magnesium Sulfate Cement Concrete (BMSCC) fabricated buildings and common portland cement concrete fabricated buildings. In addition, the steel bar collision caused by the design or construction error of the prefabricated part mainly refers to the collision of the steel bar of the prefabricated beam and the steel bar of the prefabricated column, so that the problems that the prefabricated beam is difficult to install, the column hooping of the node area is difficult to install and the like are caused, and the more serious problems that the steel bar is cut off without permission and the hooping of the node area is installed are often caused during construction, so that the earthquake-resistant performance of the node is greatly influenced, and the potential safety hazard is caused.
Disclosure of Invention
The invention provides a rectangular steel sleeve type connection method for an assembled frame node of basic magnesium sulfate cement concrete, which overcomes the defects of the prior art.
In order to achieve the purpose, the invention provides a rectangular steel sleeve type connection method of an assembled frame node of basic magnesium sulfate cement concrete, which is characterized in that:
the method comprises the following steps:
firstly, respectively pouring a precast beam and a precast column; in the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of closed end, namely the reinforcement outlet ends of every two precast beam main reinforcements are connected through a steel bar; in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement, namely, the reinforcement extending ends of the main reinforcement of the prefabricated column are free ends and are not connected with each other through extra steel bars;
step two, after the prefabricated column is in place, arranging a temporary supporting system, placing the prefabricated beam on the temporary supporting system, and enabling the edge of the prefabricated beam to be flush with the edge of the prefabricated column; the rectangular steel sleeve is an integral tubular sleeve with a rectangular section; the side wall of the rectangular steel sleeve is a plane or a corrugated surface, and the rectangular steel sleeve with the corrugated surface is suitable for casting materials with high bonding requirements; sleeving the main reinforcement of the precast column by using a rectangular steel sleeve, connecting the main reinforcement of the precast beam with the outer side of the rectangular steel sleeve at the moment, namely controlling the length of the output reinforcement of the main reinforcement of the precast beam to enable the output reinforcement to be connected with the rectangular steel sleeve sleeved on the main reinforcement of the precast column, and then welding the main reinforcement of the precast beam and the rectangular steel sleeve;
thirdly, post-pouring basic magnesium sulfate cement concrete pouring materials in a node core area between the precast columns and the precast beams; the basic magnesium sulfate cement concrete casting material is a casting material taking basic magnesium sulfate as a matrix. Wherein, the basic magnesium sulfate matrix is a basic magnesium sulfate matrix containing a basic magnesium sulfate hydration phase formed under the condition that magnesium oxide, magnesium sulfate and an additive coexist.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: the side wall of the rectangular steel sleeve is hollowed, and the hollowed rectangular steel sleeve is suitable for casting materials with poor workability.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: wherein, the side wall of the rectangular steel sleeve is non-hollow.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: the rectangular steel sleeve is formed by cutting a rectangular steel pipe or is formed by bending and welding a steel plate.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: in the third step, the basic magnesium sulfate cement concrete casting material has the strength 5-10 MPa higher than that of the precast beam and the precast column, the basic magnesium sulfate cement concrete casting material is stirred on site, and rough surfaces are made on the casting surfaces of the precast beam and the precast column before casting, and the rough surfaces are cleaned.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: and in the second step, the welding of the precast beam main rib and the rectangular steel sleeve adopts single-side welding, and the welding length is not less than 10 times of the diameter of the precast beam main rib.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: a gap is reserved between the beam end of the precast beam and the rectangular steel sleeve, the gap is not more than 100mm, and welding operation and post-cast concrete construction are facilitated.
Further, the invention provides a rectangular steel sleeve type connection method of the basic magnesium sulfate cement concrete fabricated frame node, which can also have the following characteristics: wherein the width of the cross section of the precast beam is not less than 250 mm.
The invention has the beneficial effects that:
the invention provides a rectangular steel sleeve type connection method for an assembled frame node of basic magnesium sulfate cement concrete, which comprises three main measures: the rectangular steel sleeve is adopted in the node area to replace the traditional stirrup, the main beam reinforcement does not enter the node core area but is welded with the rectangular steel sleeve, the basic magnesium sulfate cement concrete is adopted in the node area instead of the common silicate concrete, the collision of the main beam reinforcement and the column stirrup in the node area is avoided through the measures, and the construction quality is guaranteed; the basic magnesium sulfate cement concrete has the advantages of high ductility, high cohesiveness and the like, and can greatly improve the seismic resistance and energy consumption of the node; the traditional stirrups are replaced by excessive rectangular steel sleeves for the nodes, although the steel consumption is slightly increased, the labor cost is reduced through industrialized standardized prefabrication production, the economy can be improved, and more importantly, the anti-seismic requirements of 'strong node weak members, strong shear weak bending' can be met.
The rectangular steel sleeve is not an auxiliary construction measure, the action principle of the rectangular steel sleeve is 'equal to the stirrup', but the action principle of the rectangular steel sleeve is 'greater than the stirrup' in the bearing capacity effect, and the rectangular steel sleeve is an excess replacement for the stirrup required by the node core area.
The invention improves the seismic performance of the node, and the basic magnesium sulfate cement concrete assembled building node adopting the rectangular steel sleeve meets the requirement of building industrialization development, and has the advantages of reliable construction, good seismic resistance and the like.
Drawings
FIG. 1 is a schematic diagram of a rectangular steel sleeve type connection of an assembled basic magnesium sulfate cement concrete frame joint;
FIG. 2 is a front view of a planar non-hollowed rectangular steel sleeve;
FIG. 3 is a front view of a planar hollowed rectangular steel sleeve;
FIG. 4 is a front view of a corrugated-faced un-pierced rectangular steel sleeve;
FIG. 5 is a front view of a corrugated-faced hollowed rectangular steel sleeve.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The invention provides a rectangular steel sleeve type connection method for an assembled frame node of basic magnesium sulfate cement concrete, which comprises the following steps:
step one, respectively pouring the precast beam and the precast column. In the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of closed end, namely the reinforcement outlet ends of every two precast beam main reinforcements are connected through a steel bar; during pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement, namely, the reinforcement extending end part of the main reinforcement of the prefabricated column is a free end and is not connected with the main reinforcement of the prefabricated column through additional steel bars.
Step two, as shown in fig. 1, after the precast columns 3 are in place, a temporary support system is arranged, the precast beams 1 are placed on the temporary support system, and the edges of the precast beams 1 are flush with the edges of the precast columns 3.
The rectangular steel jacket 5 is an integral tubular sleeve with a rectangular cross section. The side wall of the rectangular steel sleeve is a plane or a corrugated surface, and the rectangular steel sleeve with the corrugated surface is suitable for casting materials with high bonding requirements; the side wall of the rectangular steel sleeve is non-hollowed or hollowed, and the hollowed rectangular steel sleeve is suitable for casting materials with poor workability. The rectangular steel sleeve is cut from a rectangular steel pipe, or is formed by bending and welding a steel plate.
The main reinforcement 4 of the precast column is sleeved with the rectangular steel sleeve 5, the main reinforcement 2 of the precast beam is connected with the outer side of the rectangular steel sleeve 5 at the moment, namely, the reinforcement outlet length of the main reinforcement of the precast beam is controlled to be connected with the rectangular steel sleeve sleeved on the main reinforcement of the precast column, and then the main reinforcement 2 of the precast beam and the rectangular steel sleeve 5 are welded.
The welding of the precast beam main rib 2 and the rectangular steel sleeve 5 adopts single-side welding, and the welding length is not less than 10 times of the diameter of the precast beam main rib.
A gap is reserved between the beam end of the precast beam 1 and the rectangular steel sleeve 5, the gap is not more than 100mm, and welding operation and post-cast concrete construction are facilitated.
And step three, rough surfaces are made on the casting surfaces of the precast beams and the precast columns in advance and are cleaned, basic magnesium sulfate cement concrete casting materials are stirred on site, the basic magnesium sulfate cement concrete casting materials are higher than the concrete strength of the precast beams and the precast columns by 5-10 MPa, and post-casting is carried out on the core area of the node surrounded by the precast columns and the precast beams.
The basic magnesium sulfate cement concrete pouring material is a pouring material taking basic magnesium sulfate as a matrix. The basic magnesium sulfate matrix is formed under the condition that magnesium oxide, magnesium sulfate and an additive coexist, and the basic magnesium sulfate matrix contains a basic magnesium sulfate hydration phase.
In a specific embodiment, the basic magnesium sulfate cement concrete pouring material comprises a dry mixture and water, wherein the dry mixture comprises the following raw materials in parts by mass: 100 parts of magnesium oxide, 0.05-10 parts of admixture, 5-60 parts of magnesium sulfate, 0-300 parts of filler, 200 parts of sand 130-; wherein, the magnesia is one or two of magnesite light-burned powder and dolomite light-burned powder; the additive is a mixture of a 517 crystal nucleus inducer and one or more of sodium dihydrogen phosphate, sodium hydrogen phosphate and trisodium phosphate, wherein the 517 crystal nucleus inducer is composed of 5Mg (OH)2·MgSO4·7H2O; the magnesium sulfate is magnesium sulfate heptahydrate; the filler is one or two of fly ash, silica fume, slag, wood dust, gypsum powder, dolomite powder and shale powder; the sand is one or two of river sand, lake sand, mountain sand, desalinized sea sand, machine-made sand and mixed sand; the coarse aggregate is one or two of crushed stone and pebble, and the particle size range of the coarse aggregate is 5-10 mm. The preparation method of the basic magnesium sulfate cement concrete pouring material comprises the following steps: and putting the dry mixture weighed according to the proportion into a stirrer for dry mixing, and putting water into the stirrer for uniform stirring to obtain the magnesium oxide-magnesium sulfate-magnesium mixed material.
The present invention is further illustrated by the following specific examples.
Example 1
The embodiment provides a rectangular steel sleeve type connection method of an alkali magnesium sulfate cement concrete fabricated frame node, which connects 700 × 700 prefabricated columns and 4 400 × 600 prefabricated beams at the node, and comprises the following steps:
step one, respectively pouring the precast beam and the precast column. In the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing; and in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement. The precast beam main reinforcement is 3 HRB335 steel reinforcements with the diameter of 25 on the upper and lower parts of the section; the concrete of the precast columns and the precast beams is basic magnesium sulfate cement concrete, and the strength grade is C40.
And step two, after the prefabricated columns are hoisted in place, arranging a temporary support system, and placing 4 prefabricated beams on the temporary support system, wherein the edges of the prefabricated beams are flush with the edges of the prefabricated columns. Sleeving the main ribs of the prefabricated columns from top to bottom by using rectangular steel sleeves, and then respectively welding the main ribs of the prefabricated beams of 4 prefabricated beams with the rectangular steel sleeves by adopting single-side welding, wherein the welding length is 250 mm. The rectangular steel sleeve is made of Q345 steel and is directly cut from the rectangular steel pipe, and the side face of the rectangular steel sleeve is not hollowed out, as shown in figure 2.
And step three, rough surfaces are prepared on the pouring surfaces of 4 precast beams and 1 precast column in advance and are cleaned, basic magnesium sulfate cement concrete pouring materials are stirred on site, the strength is C50, and post-pouring is carried out on the node core area.
Example 2
The embodiment provides a rectangular steel sleeve type connection method of an alkali magnesium sulfate cement concrete fabricated frame node, wherein 500 × 500 prefabricated columns are connected with 2 350 × 500 prefabricated beams at the node, and the method comprises the following steps:
step one, respectively pouring the precast beam and the precast column. In the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing; and in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement. The precast beam main reinforcement is 2 HRB400 steel bars with the diameter of 22 on the upper part and the lower part of the section respectively; the concrete of the precast columns and the precast beams is basic magnesium sulfate cement concrete, and the strength grade is C45.
And step two, after the prefabricated columns are hoisted in place, arranging a temporary support system, and placing 2 prefabricated beams on the temporary support system, wherein the edges of the prefabricated beams are flush with the edges of the prefabricated columns. Sleeving the main ribs of the prefabricated columns from top to bottom by using rectangular steel sleeves, and then respectively welding the main ribs of the prefabricated beams of 2 prefabricated beams with the rectangular steel sleeves by adopting single-side welding, wherein the welding length is 220 mm. The rectangular steel sleeve is made of Q345 steel and is directly cut from the rectangular steel pipe, and the side face of the rectangular steel sleeve is provided with a plurality of transverse strip-shaped hollows, so that the bonding force between the inner concrete and the outer concrete of the rectangular steel sleeve in the node core area is increased conveniently as shown in figure 3.
And step three, preparing rough surfaces on the pouring surfaces of the 2 precast beams and the 1 precast column in advance, cleaning, stirring basic magnesium sulfate cement concrete pouring materials on site, wherein the strength is C50, and post-pouring the node core area.
Example 3
The embodiment provides a rectangular steel sleeve type connection method of an assembly type frame node of basic magnesium sulfate cement concrete, which connects a prefabricated column of 450 × 450 and 4 prefabricated beams of 300 × 450 at the node, and comprises the following steps:
step one, respectively pouring the precast beam and the precast column. In the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing; and in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement. The precast beam main reinforcement is 3 HRB335 steel reinforcements with the diameter of 25 on the upper and lower parts of the section; the concrete of the precast columns and the precast beams is basic magnesium sulfate cement concrete, and the strength grade is C60.
And step two, after the prefabricated columns are hoisted in place, arranging a temporary support system, and placing 4 prefabricated beams on the temporary support system, wherein the edges of the prefabricated beams are flush with the edges of the prefabricated columns. Sleeving the main ribs of the prefabricated columns from top to bottom by using rectangular steel sleeves, and then respectively welding the main ribs of the prefabricated beams of 4 prefabricated beams with the rectangular steel sleeves by adopting single-side welding, wherein the welding length is 250 mm. The rectangular steel sleeve is made of Q345 steel, the rectangular steel sleeve is made of steel plates through bending and welding, the side faces are non-hollowed corrugated faces, and as shown in figure 4, the bonding force between the inner concrete and the outer concrete of the rectangular steel sleeve in the node core area is increased.
And step three, rough surfaces are prepared on the pouring surfaces of 4 precast beams and 1 precast column in advance and are cleaned, basic magnesium sulfate cement concrete pouring materials are stirred on site, the strength is C65, and post-pouring is carried out on the node core area.
Example 4
The embodiment provides a rectangular steel sleeve type connection method of an alkali magnesium sulfate cement concrete fabricated frame node, which connects 550 × 550 prefabricated columns and 2 350 × 500 prefabricated beams at the node, and comprises the following steps:
step one, respectively pouring the precast beam and the precast column. In the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing; and in the pouring of the prefabricated column, the main reinforcement of the prefabricated column directly and normally extends out of the reinforcement. The precast beam main reinforcement is 2 HRB400 steel bars with the diameter of 22 on the upper part and the lower part of the section respectively; the concrete of the precast columns and the precast beams is common portland cement concrete, and the strength grade is C40.
And step two, after the prefabricated columns are hoisted in place, arranging a temporary support system, and placing 2 prefabricated beams on the temporary support system, wherein the edges of the prefabricated beams are flush with the edges of the prefabricated columns. Sleeving the main ribs of the prefabricated columns from top to bottom by using rectangular steel sleeves, and then respectively welding the main ribs of the prefabricated beams of 2 prefabricated beams with the rectangular steel sleeves by adopting single-side welding, wherein the welding length is 220 mm. The rectangular steel sleeve is made of Q345 steel, the rectangular steel sleeve is formed by bending and welding steel plates, the side face of the rectangular steel sleeve is a hollow corrugated face, and as shown in figure 5, the bonding force between the inner concrete and the outer concrete of the rectangular steel sleeve in the node core area is increased.
And step three, preparing rough surfaces on the pouring surfaces of the 2 precast beams and the 1 precast column in advance, cleaning, stirring basic magnesium sulfate cement concrete pouring materials on site, wherein the strength is C50, and post-pouring the node core area.
Claims (6)
1. A rectangular steel sleeve type connection method for an alkali magnesium sulfate cement concrete assembled frame node is characterized in that:
the method comprises the following steps:
firstly, respectively pouring a precast beam and a precast column;
in the pouring of the precast beam, the main reinforcement outlet of the precast beam adopts a form of end part sealing;
in the pouring of the prefabricated column, a main rib of the prefabricated column directly forms a rib;
step two, after the prefabricated column is in place, arranging a temporary supporting system, placing the prefabricated beam on the temporary supporting system, and enabling the edge of the prefabricated beam to be flush with the edge of the prefabricated column;
the rectangular steel sleeve is an integral tubular sleeve with a rectangular section; the side wall of the rectangular steel sleeve is a plane or a corrugated surface; the side wall of the rectangular steel sleeve is hollowed;
sleeving the main reinforcement of the precast column by using a rectangular steel sleeve, connecting the main reinforcement of the precast beam with the outer side of the rectangular steel sleeve at the moment, and welding the main reinforcement of the precast beam and the rectangular steel sleeve;
thirdly, post-pouring basic magnesium sulfate cement concrete pouring materials in a node core area between the precast columns and the precast beams;
the basic magnesium sulfate cement concrete casting material is a casting material taking basic magnesium sulfate as a matrix.
2. The rectangular steel sleeve type connection method for the basic magnesium sulfate cement concrete fabricated frame joint according to claim 1, characterized in that:
the rectangular steel sleeve is formed by cutting a rectangular steel pipe or is formed by bending and welding a steel plate.
3. The rectangular steel sleeve type connection method for the basic magnesium sulfate cement concrete fabricated frame joint according to claim 1, characterized in that:
and in the third step, the basic magnesium sulfate cement concrete pouring material has the strength 5-10 MPa higher than that of the precast beam and the precast column, the basic magnesium sulfate cement concrete pouring material is stirred on site, and rough surfaces are made on the pouring surfaces of the precast beam and the precast column before pouring and are cleaned.
4. The rectangular steel sleeve type connection method for the basic magnesium sulfate cement concrete fabricated frame joint according to claim 1, characterized in that:
and in the second step, the welding of the precast beam main rib and the rectangular steel sleeve adopts single-side welding, and the welding length is not less than 10 times of the diameter of the precast beam main rib.
5. The rectangular steel sleeve type connection method for the basic magnesium sulfate cement concrete fabricated frame joint according to claim 1, characterized in that:
and a gap is reserved between the beam end of the precast beam and the rectangular steel sleeve, and the gap is not more than 100 mm.
6. The rectangular steel sleeve type connection method for the basic magnesium sulfate cement concrete fabricated frame joint according to claim 1, characterized in that:
wherein the width of the cross section of the precast beam is not less than 250 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011621750.2A CN112814150B (en) | 2020-12-30 | 2020-12-30 | Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011621750.2A CN112814150B (en) | 2020-12-30 | 2020-12-30 | Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112814150A CN112814150A (en) | 2021-05-18 |
| CN112814150B true CN112814150B (en) | 2022-03-15 |
Family
ID=75856136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011621750.2A Active CN112814150B (en) | 2020-12-30 | 2020-12-30 | Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814150B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114789498B (en) * | 2022-03-09 | 2024-04-05 | 上海城建市政工程（集团）有限公司 | Production method of prefabricated part of UHPC (ultra high Performance) external decorative plate with large aperture ratio |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004108091A (en) * | 2002-09-20 | 2004-04-08 | Shimizu Corp | Composite structure building and construction method therefor |
| CN101545283A (en) * | 2009-04-30 | 2009-09-30 | 中国建筑股份有限公司 | Steel reinforced concrete column and cast-in-site reinforced concrete girder connection and construction method thereof |
| JP2017036653A (en) * | 2015-08-07 | 2017-02-16 | 日鐵住金建材株式会社 | Column-beam joining structure and method, method of designing column-beam joining structure, and program for designing column-beam joining structure |
| CN106049691B (en) * | 2016-07-20 | 2019-03-08 | 福建工程学院 | A kind of fully-prefabricated assembled steel tube confinement frame joint |
| EP3366853B1 (en) * | 2017-02-24 | 2020-04-22 | New World China Land Limited | Prefabricated structural system and assembling method thereof |
| CN207829154U (en) * | 2017-12-28 | 2018-09-07 | 上海建工二建集团有限公司 | Prefabricated node and UHPC post-cast connected assembly type frame system |
| CN208501878U (en) * | 2018-07-02 | 2019-02-15 | 西安建筑科技大学 | A kind of Self-resetting prefabrication and assembly construction frame structure interior joint |
| CN110792165B (en) * | 2019-11-13 | 2021-03-16 | 金陵科技学院 | Prefabricated assembly type concrete beam column joint connecting device and method |
| CN111075015A (en) * | 2020-03-02 | 2020-04-28 | 扬州大学 | Socket joint type prefabricated steel-concrete joint |
| CN111576619B (en) * | 2020-05-29 | 2023-01-24 | 三一筑工科技股份有限公司 | Production method of high-strength concrete post-cast assembled frame system |
| CN111764508B (en) * | 2020-06-17 | 2021-11-16 | 江苏华源建筑设计研究院股份有限公司 | Reinforced concrete strip steel annular plate connecting node and connecting method for prefabricated beam column |
| CN112049241A (en) * | 2020-09-01 | 2020-12-08 | 上海家树建筑工程有限公司 | Connecting structure for precast beam column and construction method thereof |
-
2020
- 2020-12-30 CN CN202011621750.2A patent/CN112814150B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112814150A (en) | 2021-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104594210B (en) | A kind of concrete prefabricated board and its preparation method and application | |
| CN111364658B (en) | Environment-friendly construction method for prefabricated assembled concrete floor plate | |
| CN113638489B (en) | RC beam column node can be dismantled to assembled | |
| CN111663681A (en) | Assembled wall body connecting structure and construction method thereof | |
| CN109989520A (en) | Prefabricated high ductility clear-water concrete Sandwich insulation wallboard | |
| CN104712079B (en) | The assembled polypropylene fibre sludge ceramsite concrete wall and its construction method connected based on mat surface | |
| CN111411693A (en) | Assembly and pouring integrated shear wall structure building system | |
| CN112814150B (en) | Rectangular steel sleeve type connection method for basic magnesium sulfate cement concrete assembled frame nodes | |
| CN109577192B (en) | Prefabricated bridge plate with built-in steel reinforcement framework | |
| CN104763074A (en) | Rough surface connection based assembly steel fiber regeneration brick concrete wall and construction method thereof | |
| JP2000345515A (en) | High-strength light composite girder bridge and construction method therefor | |
| CN112814151B (en) | Connecting method of basic magnesium sulfate cement concrete assembled frame nodes | |
| CN109797902A (en) | Prefabrication ash wall body plate | |
| CN101831971A (en) | Concrete shear wall with short piers | |
| JP2003213623A (en) | Upper structure of ridge | |
| CN111424848A (en) | Assembled integral type composite heat-insulation shear wall structure and construction method thereof | |
| CN212336412U (en) | Assembled wall connection structure | |
| CN110130553B (en) | Heat-insulating floor structure and production method | |
| CN115045441A (en) | UHPC template-steel pipe concrete superposed short column and construction method thereof | |
| WO2007039887A2 (en) | A method of constructing a roof or floor slab | |
| CN109577190B (en) | Prefabricated bridge plate | |
| CN114108806A (en) | Prefabricated assembled steel pipe UHPC composite hollow column-steel beam combined frame | |
| CN112064824A (en) | Combined-connection prefabricated shear wall system | |
| CN111236068A (en) | Spliced prefabricated steel-concrete beam bridge deck | |
| CN106284990A (en) | A kind of central island prefabricated Cavity structural member of force type cavity building roof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |