CN111663697A - Assembled concrete double-T-plate splicing seam bolt connecting structure - Google Patents
Assembled concrete double-T-plate splicing seam bolt connecting structure Download PDFInfo
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- CN111663697A CN111663697A CN202010485854.9A CN202010485854A CN111663697A CN 111663697 A CN111663697 A CN 111663697A CN 202010485854 A CN202010485854 A CN 202010485854A CN 111663697 A CN111663697 A CN 111663697A
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
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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
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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)
- Road Paving Structures (AREA)
Abstract
The invention relates to an assembly type concrete double-T-plate abutted seam bolt connecting structure, aims to solve the abutted seam connecting problem of double-T-plate flanges in an assembly type building large-span floor (house) cover structure system, and belongs to the technical field of structural engineering. The T-shaped steel plate fixing device comprises two T-shaped steel plates, anchor bars welded with the T-shaped steel plates, connecting steel plates used for fixing the two T-shaped steel plates, high-strength bolts and circular washers; the double-T plate flange comprises a layer of reinforcing steel mesh paved by longitudinal and transverse reinforcing steel bars and a rectangular notch which is positioned on the side of the plate and is convenient for installing a bolt connecting piece; concrete overlapping layers are poured on the upper portions of the flanges of the double T-shaped plates and at the bolt connecting pieces, and the connecting performance of the abutted seam portions and the overall performance of the double T-shaped plate floor are enhanced. The connecting structure has the advantages of reliable quality, convenient construction, reasonable stress, easy repair of the damaged connecting piece under the action of horizontal earthquake load and strong applicability.
Description
Technical Field
The invention belongs to the technical field of structural engineering, and particularly relates to an assembly type concrete double-T-plate abutted seam bolt connecting structure which is mainly applied to an assembly type building large-span floor (house) cover structure system.
Background
The large-span and large-space fabricated concrete public building is an important component for promoting the development of prefabricated building structures in China. The double T-shaped plate becomes a preferred member of a large-span building (house) cover structure system by virtue of the advantages of high bearing capacity, convenience and rapidness in construction, good fire resistance, good technical economy and the like. Under the action of earthquake load, the abutted seams of the double-T-plate floor system are weak parts, and the connection reliability of the abutted seams directly influences the overall performance of the floor system and the earthquake-resistant performance of the overall building structure.
The common domestic double-T plate floor cover system is divided into a 'dry' floor system and a 'wet' floor system. The 'dry' floor system realizes the connection of the flanges of the adjacent double T-shaped plates through mechanical connecting pieces. The wet floor system realizes the connection of the flanges of the adjacent double T-shaped plates through a mechanical connecting piece and a concrete post-pouring layer or only through the concrete post-pouring layer. Generally, a 'dry' floor system is adopted in a medium-intensity area and a 'wet' floor system is adopted in a high-intensity area, mechanical connecting pieces are mostly welded, and the requirement on the quality of welding seams is high.
In the large-span fabricated concrete public building in China, a 'wet' floor system is generally adopted. One method is to pour fine aggregate concrete or locally arrange reinforcing steel bars in reserved joints after the double T-shaped plates are assembled and pour concrete surface layers, and the other method is to realize the load transfer goal in a mode that mechanical connecting pieces are embedded in the flanges of the double T-shaped plates and connected in a welding mode. The existing welding connection technology is that a steel fillet or a folded steel plate is welded at an embedded part of a flange of a double-T plate to realize the connection of flanges of adjacent double-T plates, the connection mode relieves the problem of poor integrity of an assembled double-T plate floor system to a certain extent, but local high temperature generated by welding easily causes the attenuation of the bonding action between the embedded part and concrete, the welding residual stress easily causes initial cracks on the concrete around a connecting part, the mechanical property of the connecting part is reduced, the in-plane rigidity and strength of the integral floor system are further influenced, the on-site welding workload is large during construction, and the welding quality is difficult to control.
According to the three-level fortification target of 'no damage of small earthquake, repairable middle earthquake and no fall of large earthquake' proposed by 'building earthquake design Specification' GB50011-2010 in China, the connection of the double-T plate floor system needs to meet the design and basic earthquake resistance requirements of the assembled floor system, and needs to be easy to repair under the action of small earthquake or middle earthquake. The existing welding connecting piece is difficult to meet the requirement, and the maintenance is difficult after the earthquake.
Disclosure of Invention
The invention aims to provide an assembly type concrete double-T-plate abutted seam bolt connecting structure, which solves the problems that the welding seam quality of an assembly type concrete double-T-plate floor is difficult to control and maintain and the like in the prior art, improves the connection quality of an assembly type concrete double-T-plate floor system, reduces the construction difficulty and is beneficial to restoration and reutilization after earthquake.
The technical scheme adopted by the invention is as follows: the assembled concrete double-T-plate abutted seam bolt connecting structure comprises a bolt connecting piece and two adjacent double-T-plate flanges, wherein the bolt connecting piece comprises two T-shaped steel plates, an anchor bar welded with the T-shaped steel plates, a connecting steel plate used for fixing the two T-shaped steel plates, a high-strength bolt and a circular washer, and each double-T-plate flange comprises a layer of reinforcing steel mesh paved by longitudinal and transverse reinforcing steel bars and a rectangular notch positioned on the side of each plate and facilitating installation of the bolt connecting piece; and concrete superposed layers are poured on the upper parts of the flanges of the double T-shaped plates and the bolt connecting pieces.
Furthermore, the T-shaped steel plate is an integrated part, and two identical bolt holes are formed in a web plate in the middle of the T-shaped steel plate along the edge joint direction; the integrated design effectively avoids the brittle failure of the connecting surface of the flange and the web of the bolt connecting piece too early.
Furthermore, the anchor bars are three-level twisted steel bars, the two ends of the anchor bars are bent at the same angle, webs of the T-shaped steel plates are used as symmetry axes, the anchor bars are horizontally welded at the two ends of the flange of the T-shaped steel plate, the length of a welding line is equal to the length of the horizontal section of the anchor bars, and the bonding and anchoring effects of the bolt connecting piece, the flange of the double T-shaped steel plate and the concrete post-pouring layer under the horizontal load action are increased.
Furthermore, four bolt holes with the same positions as those of the web plate of the T-shaped steel plate are formed in the connecting steel plate.
Furthermore, the upper side and the lower side of a web plate of the T-shaped steel plate are respectively provided with a connecting steel plate, and the T-shaped steel plate and the connecting steel plates are fixed through high-strength bolts; the area of the connecting steel plate is smaller than the sum of the areas of the two adjacent web plates.
Further, the diameter of the high-strength bolt is slightly smaller than that of the bolt hole, and the aperture of the circular gasket is equal to that of the bolt hole.
Furthermore, the high-strength bolt comprises a bolt rod and a nut, the bolt rod penetrates through the bolt hole, a circular washer is arranged on each of two sides of the bolt hole, the nut is screwed on the bolt rod on the other side, and the nut is tightly attached to the circular washer.
Further, the flanges of the T-shaped steel plates are vertically arranged and embedded into the flanges of the double T-shaped plates together with the anchor bars at the lower ends of the flanges, and the anchor bars at the upper ends of the webs and the flanges are exposed.
And furthermore, a steel bar net piece is arranged in the concrete overlapping layer, and at least two bolt connecting pieces are arranged on each abutted seam.
The invention has the following beneficial effects:
1. the quality is reliable: the double-T plate floor and the bolt connecting piece can be produced in a factory in a standardized batch mode, and the quality is guaranteed.
2. The construction is convenient: the double-T plate flange and the bolt connecting piece are transported to a construction site, the bolt is installed after hoisting is completed, a concrete post-pouring layer is poured, and the technical difficulty is reduced.
3. The stress is reasonable: horizontal loads such as earthquake loads, wind loads and the like are jointly stressed by the bolt connecting piece and the concrete superposed layer on the upper portion of the wing edge of the double T-shaped plate and are transmitted to the vertical lateral force resisting component, and under the action of the vertical loads, the connecting piece and the superposed layer can transmit floor stress, so that a force transmission path is clear, the deformation in a floor plane is effectively reduced, and the overall performance is improved.
4. Damage is easy to repair: under the action of small and medium earthquakes, after the bolts are sheared and damaged, the T-shaped steel plate and the double T-shaped steel plate can be repaired and reused under the condition that the wing edges of the T-shaped steel plate and the double T-shaped steel plate are complete, namely, the concrete at the position of the connecting piece is chiseled off, the wing edges of the double T-shaped steel plate are restored to the original position, the high-strength bolts are installed again for reuse, or the web plate connecting the steel plate and the T-shaped steel plate is directly subjected to three-side girth welding connection and.
5. The applicability is strong: the double-T plate floor system connected by the bolts can be widely applied to large-span assembly type concrete buildings such as factory buildings, warehouses, parking lots, markets and the like.
Drawings
FIG. 1 is a plan view of an uncased concrete composite layer according to the present invention;
FIG. 2 is a schematic view of the cross-section A-A of FIG. 1 with a concrete composite poured;
FIG. 3 is an elevational view of a T-shaped steel plate for welding the anchor bars in the present invention;
FIG. 4 is a plan view of a T-shaped steel plate for welding the anchor bars according to the present invention;
FIG. 5 is a plan view of a connecting steel plate of the present invention;
FIG. 6 is a plan view of the tendon of the present invention;
in the figure: 1-double T plate flange, 2-T steel plate, 3-anchor bar, 4-connecting steel plate, 5-high-strength bolt, 6-circular washer, 7-reinforcing bar net piece, 8-notch, 9-concrete laminated layer, 10-bolt hole, 11-welding seam, 12-reinforcing bar net piece and 13-web plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, an assembled concrete double-T panel splicing bolt connection structure according to an embodiment of the present invention includes a bolt connection member and an adjacent double-T panel flange 1. The bolt connecting piece comprises a T-shaped steel plate 2, an anchor bar 3 welded with the T-shaped steel plate, a connecting steel plate 4, a high-strength bolt 5 and a circular washer 6. The double-T plate flange 1 comprises a layer of reinforcing mesh 7 paved by longitudinal and transverse reinforcing steel bars and a notch 8 which is positioned on the side edge of the plate and is convenient for installing a connecting piece, and a concrete superposed layer 9 is poured on the upper part of the double-T plate flange 1 and the bolt connection part.
As shown in fig. 3 to 5, the T-shaped steel plate 2 is an integral component, and two identical bolt holes 10 are formed in a web 13 of the T-shaped steel plate 2 along a patchwork direction. Anchor rod 3 is ordinary tertiary twisted steel material, and is integrated part, and the same angle is buckled at anchor rod 3's both ends, and the level is placed during the installation to web 13 of T shaped steel board 2 is the symmetry axis, respectively welds one at T shaped steel board 2 flange both ends, and the length of welding seam 11 equals anchor rod 3's horizontal segment length, ensures sufficient anchor strength.
As shown in fig. 2 and 6, the connecting steel plate 4 is provided with four bolt holes 10 which are identical to the web 13 of the T-shaped steel plate 2 and are in one-to-one correspondence with each other in position. The upper side and the lower side of the web 13 of the T-shaped steel plate 2 are respectively provided with a connecting steel plate 4, and the area of the connecting steel plate 4 is smaller than the sum of the areas of the webs 13 of the two adjacent T-shaped steel plates 2.
The connecting steel plate 4 is connected with the T-shaped steel plate 2 through a high-strength bolt 5, the diameter of the high-strength bolt 5 is slightly smaller than that of the bolt hole 10, and the aperture of the circular washer 6 is equal to that of the bolt hole 10. The high-strength bolt 5 comprises a bolt rod and a nut, the bolt rod penetrates through the bolt hole 10, circular gaskets 6 are respectively arranged on two sides of the bolt hole 10, the nut is screwed on the bolt rod on the other side, and the nut is tightly attached to the circular gaskets 6.
The flange of the T-shaped steel plate 2 is vertically arranged, and is pre-buried into the flange 1 of the double T-shaped plate together with the anchor bars 3 at the lower end of the flange, and the web 13 and the anchor bars 3 at the upper end of the flange are exposed. A layer of reinforcing mesh 7 paved by distributed ribs vertically and horizontally is arranged in the double-T plate flange 1, and a rectangular notch 8 is formed in the mounting position of the bolt connecting piece.
And a steel bar net piece 12 is arranged in a concrete overlapping layer poured on the upper part of the double-T plate flange 1 and the bolt joint, and each abutted seam is provided with a plurality of bolt connecting pieces according to the design requirement.
The invention discloses a construction method of an assembled concrete double-T-plate splicing seam bolt connecting structure, which comprises the following steps:
step one, machining a bolt connecting piece in a factory. The T-shaped steel plate 2 is manufactured, two identical bolt holes 10 are formed in the web 13 in the splicing direction, the two ends of the anchor bars 3 are bent by the same angle and horizontally placed, the web 13 of the T-shaped steel plate 2 serves as a symmetry axis, two ends of the flange of the T-shaped steel plate 2 are respectively welded with one bolt hole, and the length of a welding seam 11 is equal to the length of the horizontal section of the anchor bars 3. And 4 bolt holes 10 which are the same as the web plates of the T-shaped steel plates 2 are formed in the rectangular connecting steel plates 4 and correspond to the positions one by one. The area of the connecting steel plate 4 is smaller than the sum of the areas of the two adjacent webs of the T-shaped steel plates 2. The diameter of the high-strength bolt 5 is slightly smaller than that of the bolt hole 10, and the aperture of the circular washer 6 is equal to that of the bolt hole 10.
And step two, manufacturing the double-T plate in the prefabricated part factory. The flange of the T-shaped steel plate 2 is vertically arranged, and is pre-buried into the flange 1 of the double T-shaped plate together with the anchor bars 3 at the lower end of the flange, and the web 13 and the anchor bars 3 at the upper end of the flange are exposed. A layer of reinforcing mesh 7 paved by distributed ribs vertically and horizontally is arranged in the double-T plate flange 1, and a rectangular notch 8 is formed in the mounting position of the bolt connecting piece.
And step three, assembling the components on the construction site. The prefabricated double-T plate and bolt connecting piece sub-assemblies are transported to a construction site to be sequentially hoisted, the upper side and the lower side of a web plate 13 of a T-shaped steel plate 2 are respectively provided with a connecting steel plate 4, bolt holes are ensured to be aligned, a bolt rod of a high-strength bolt 5 is arranged in the bolt hole 10 in a penetrating mode, two sides of the bolt hole 10 are respectively provided with a circular gasket 6, a nut is screwed on the bolt rod on the other side, and the nut is tightly attached to the circular gasket 6, so that the installation of the bolt connecting piece is completed. Each piece is provided with a plurality of bolt connecting pieces according to design requirements.
And step four, pouring the concrete superposed layer 9. And (3) supporting templates around the double-T plate floor, paving a reinforcing mesh 12 on the upper part of the flange 1 of the double-T plate, pouring concrete, and curing the concrete laminated layer 9 under natural conditions to complete the construction of the assembled concrete double-T plate splicing seam bolt connection structure.
Claims (9)
1. The utility model provides a two T board piece bolted connection structures of assembled concrete, includes bolted connection spare and adjacent two T board edges of a wing, its characterized in that: the bolt connecting piece comprises two T-shaped steel plates, an anchor bar welded with the T-shaped steel plates, a connecting steel plate used for fixing the two T-shaped steel plates, a high-strength bolt and a circular washer; the double-T plate flange comprises a layer of reinforcing steel mesh paved by longitudinal and transverse reinforcing steel bars and a rectangular notch which is positioned on the side of the plate and is convenient for installing a bolt connecting piece; and concrete superposed layers are poured on the upper parts of the flanges of the double T-shaped plates and the bolt connecting pieces.
2. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: the T-shaped steel plate is an integrated part, and two identical bolt holes are formed in a web plate in the middle of the T-shaped steel plate along the edge joint direction.
3. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: the anchor bar is a three-level twisted steel bar, two ends of the twisted steel bar are bent at the same angle, a web plate of the T-shaped steel plate is taken as a symmetry axis, the twisted steel bar is horizontally welded at two ends of a flange of the T-shaped steel plate, and the length of a welding line is equal to the length of a horizontal section of the anchor bar.
4. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: and the connecting steel plate is provided with four bolt holes with the same positions as the web plate of the T-shaped steel plate.
5. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 2, wherein: the upper side and the lower side of a web plate of the T-shaped steel plate are respectively provided with a connecting steel plate, and the T-shaped steel plate and the connecting steel plates are fixed through high-strength bolts; the area of the connecting steel plate is smaller than the sum of the areas of the two adjacent webs.
6. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: the diameter of the high-strength bolt is slightly smaller than that of the bolt hole, and the aperture of the circular gasket is equal to that of the bolt hole.
7. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: the high-strength bolt comprises a bolt rod and a nut, the bolt rod penetrates through the bolt hole, circular washers are arranged on two sides of the bolt hole respectively, the nut is screwed on the bolt rod on the other side, and the nut is tightly attached to the circular washers.
8. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: the flanges of the T-shaped steel plates are vertically arranged and embedded into the flanges of the double T-shaped plates together with the anchor bars at the lower ends of the flanges, and the anchor bars at the upper ends of the webs and the flanges are exposed.
9. The fabricated concrete double-T plate splicing seam bolt connecting structure according to claim 1, wherein: and a reinforcing mesh is arranged in the concrete overlapping layer, and at least two bolt connecting pieces are arranged at each abutted seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010485854.9A CN111663697A (en) | 2020-06-01 | 2020-06-01 | Assembled concrete double-T-plate splicing seam bolt connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010485854.9A CN111663697A (en) | 2020-06-01 | 2020-06-01 | Assembled concrete double-T-plate splicing seam bolt connecting structure |
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| CN111663697A true CN111663697A (en) | 2020-09-15 |
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| CN202010485854.9A Pending CN111663697A (en) | 2020-06-01 | 2020-06-01 | Assembled concrete double-T-plate splicing seam bolt connecting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030383A (en) * | 2022-07-20 | 2022-09-09 | 东南大学 | Bolt type node connecting device of full-assembly type floor system |
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| CN203347077U (en) * | 2013-06-09 | 2013-12-18 | 中冶建筑研究总院有限公司 | Steel and concrete flitch beam |
| CN204252286U (en) * | 2014-10-27 | 2015-04-08 | 华北水利水电大学 | A kind of rectangular steel-tube concrete column-steel beam connecting joint |
| CN107905423A (en) * | 2017-10-23 | 2018-04-13 | 华侨大学 | A kind of assembly concrete floor and its construction method |
| CN107975176A (en) * | 2017-11-23 | 2018-05-01 | 哈尔滨工业大学 | Assembly concrete mat formation in advance building cover board H-shaped node connector and connection method |
| CN208884773U (en) * | 2018-09-29 | 2019-05-21 | 郝孟天 | A kind of vertical piece attachment device of assembly concrete shear wall |
| WO2020047617A1 (en) * | 2018-09-06 | 2020-03-12 | Megawall Pty Ltd | Improvements relating to building panels |
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2020
- 2020-06-01 CN CN202010485854.9A patent/CN111663697A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203347077U (en) * | 2013-06-09 | 2013-12-18 | 中冶建筑研究总院有限公司 | Steel and concrete flitch beam |
| CN204252286U (en) * | 2014-10-27 | 2015-04-08 | 华北水利水电大学 | A kind of rectangular steel-tube concrete column-steel beam connecting joint |
| CN107905423A (en) * | 2017-10-23 | 2018-04-13 | 华侨大学 | A kind of assembly concrete floor and its construction method |
| CN107975176A (en) * | 2017-11-23 | 2018-05-01 | 哈尔滨工业大学 | Assembly concrete mat formation in advance building cover board H-shaped node connector and connection method |
| WO2020047617A1 (en) * | 2018-09-06 | 2020-03-12 | Megawall Pty Ltd | Improvements relating to building panels |
| CN208884773U (en) * | 2018-09-29 | 2019-05-21 | 郝孟天 | A kind of vertical piece attachment device of assembly concrete shear wall |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030383A (en) * | 2022-07-20 | 2022-09-09 | 东南大学 | Bolt type node connecting device of full-assembly type floor system |
| CN115030383B (en) * | 2022-07-20 | 2024-03-26 | 东南大学 | Bolt type node connecting device of fully assembled floor system |
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Application publication date: 20200915 |
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