CN114108831B - Connecting node of assembled external wall panel and installation and design method thereof - Google Patents

Connecting node of assembled external wall panel and installation and design method thereof Download PDF

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Publication number
CN114108831B
CN114108831B CN202111362450.1A CN202111362450A CN114108831B CN 114108831 B CN114108831 B CN 114108831B CN 202111362450 A CN202111362450 A CN 202111362450A CN 114108831 B CN114108831 B CN 114108831B
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external wall
wall panel
layer
plate
units
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CN114108831A (en
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张国军
黄威振
王明珠
葛家琪
刘鑫刚
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China Aviation Planning and Design Institute Group Co Ltd
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China Aviation Planning and Design Institute Group Co Ltd
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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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Load-Bearing And Curtain Walls (AREA)

Abstract

The utility model provides a connecting node and installation, design method of assembled side fascia, including structural frame and the side fascia through outer connecting component fixed connection, outer connecting component includes the connecting portion of fixed connection on structural frame and the outer hanging portion that the cantilever stretched out structural frame outside surface, open on the outer hanging portion has the spread groove, outer connecting component still includes high strength bolt, the high strength screw rod of upper bolt and lower bolt buries the reinforcing bar welding as an organic whole with the inside side fascia unit of side fascia unit, the high strength screw rod of upper bolt and lower bolt stretches out the thickness that the side fascia unit is higher than outer hanging connection layer board, this part inserts the spread groove respectively and fastens to the surface of outer hanging connection layer board through respective nut. According to the invention, holes are not required to be drilled or drilled on the existing autoclaved aerated concrete wallboard, so that the damage and stress concentration of the autoclaved aerated concrete externally-hung wallboard are not caused, and the technical problem that a cold bridge is easy to form in the traditional node and the heat insulation performance of the wallboard is affected is solved.

Description

Connecting node of assembled external wall panel and installation and design method thereof
Technical Field
The invention belongs to the technical field of assembled wallboards, and particularly relates to an assembly-connected external wallboard slidable connection node and an installation and design method thereof.
Background
At present, green buildings, industrial buildings and large-scale security house projects provide a wide platform for the development of assembled steel structures. The design research of the assembled steel structure main body is mature, the production, the manufacture and the installation of the assembled steel structure main body are highly industrialized, the outer wall is an important component part in the residential building envelope structure, and the advantages and disadvantages of the assembled steel structure main body have important influence on the overall quality of the house. At present, many researches on main structures and connection structures in the fabricated building are carried out, but an external wall enclosure structure matched with the fabricated building still has no mature solution, particularly a fabricated steel structure, which is an important factor for restricting the development of the fabricated building. The exterior wall enclosure structure not only meets the requirements of heat preservation, sound insulation, heat insulation, sealing and fire prevention, but also ensures that the enclosure structure is not damaged or dropped under the extreme conditions of earthquake, strong wind and the like, and meets the requirements of stability and safety. At present, most of prefabricated assembly type exterior wall materials are light concrete materials, light wallboard products and exterior wall connection modes in the market are various, but the quality is uneven, and related industries and national standards are not available, so that the exterior wall technology is difficult to achieve standardization and generalization.
The researches on the external wall panels by technicians are mainly focused on the anti-seismic performance and the wind resistance of the panels, and the researches on the connection nodes of the external wall panels are less, so that the popularization and the application of the aerated concrete external wall panels are limited to a certain extent. The connecting pieces between the aerated concrete wallboard and the main body which are widely used at present are hook head bolt nodes, steel pipe anchor nodes and the like, and the traditional connecting modes usually need to be perforated or drilled on the aerated concrete, so that the damage and stress concentration of the aerated concrete wall are easy to cause. The shear bearing capacity of the aerated concrete is poor, and the damage form of the aerated concrete wall body under the condition of larger interlayer displacement is usually shear damage caused by stress concentration at the nodes, so that the aerated concrete external wall board is easy to fall off in the earthquake process to cause serious disasters. And the traditional nodes are easy to form a cold bridge, so that the heat insulation performance of the wall body is greatly influenced. At present, the traditional aerated concrete connecting nodes have certain defects, so that a novel connecting node is necessary to be designed, and the technical defects of the existing connecting node are overcome.
Disclosure of Invention
The invention aims to provide a connecting node of an assembled external wall panel and an installation and design method thereof, and aims to solve the technical problems that the existing connecting node of the external wall panel needs to be perforated or drilled on aerated concrete, so that the damage and stress concentration of the external wall panel of the aerated concrete are easy to cause, the shearing damage caused by the stress concentration is easy to cause, and the external wall panel of the aerated concrete is easy to fall off in the earthquake process to cause serious disasters; the technical problem that the heat insulation performance of the wallboard is affected due to the fact that a cold bridge is easily formed by the traditional nodes is solved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the connecting node of the assembled external wall panel comprises a structural frame and an external wall panel fixedly connected to the outer side surface of the structural frame through an externally hung connecting component, wherein the external wall panel is an autoclaved aerated reinforced concrete wall panel, the structural frame comprises a layer of steel columns and two layers of steel beams, the steel beams comprise an upper steel beam connected between the tops of the steel columns and a lower steel beam connected between the bottoms of the steel columns, the external wall panel is formed by connecting a group of external wall panel units in parallel along the outer side of the structural frame vertically, the height of the external wall panel is adaptive to the height of the structural frame,
the externally hung connecting component comprises a group of externally hung connecting supporting plates which are in one-to-one correspondence with the external wall panel units, the externally hung connecting supporting plates are arranged in pairs up and down, each pair of externally hung connecting supporting plates are respectively positioned at the upper side and the lower side of the corresponding external wall panel unit, the externally hung connecting supporting plates comprise an upper supporting plate and a lower supporting plate, the upper supporting plate is fixedly connected at the top side of a column and/or the top side of an upper steel beam, the corresponding lower supporting plate is fixedly connected at the bottom of the column and/or the bottom side of the lower steel beam,
the upper supporting plate and the lower supporting plate have the same structure and comprise a connecting part fixedly connected to the structural frame and an externally hung part of which the cantilever extends out of the outer side surface of the structural frame, the externally hung part is provided with a connecting groove, the connecting groove comprises a long round bar hole edge which is centrally arranged along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part,
The external connection assembly further comprises a group of high-strength bolts matched with the external connection supporting plates one by one, the high-strength bolts comprise high-strength screws and nuts, an upper bolt is embedded in the middle of the upper side of each external wall plate unit, a lower bolt is embedded in the middle of the lower side of each external wall plate unit, the parts of the upper bolts and the high-strength screws of the lower bolts embedded in the external wall plate units are welded with steel bars inside the external wall plate units into a whole, the heights of the parts of the upper bolts and the high-strength screws of the lower bolts, extending out of the external wall plate units, are higher than the thickness of the external connection supporting plates, and the parts are respectively inserted into long round strip hole edges on the upper supporting plates and the lower supporting plates and are fastened to the surface of the external connection supporting plates through the nuts.
The connecting groove also comprises a sliding edge which is communicated with one end of the long round bar hole edge and the outer edge of the outer hanging part, so that the connecting groove is L-shaped.
The connecting node of the assembled external wall panel comprises a structural frame and a total n-layer external wall panel fixedly connected to the outer side surface of the structural frame through an externally hung connecting component, wherein n is more than or equal to 2, the structural frame comprises total n layers of steel columns and total n+1 layers of steel beams, each steel column comprises a first layer of steel columns and total n-1 layers of standard layer steel columns, each steel beam comprises a first layer of two steel beams and total n-1 layers of standard layer steel beams, each first layer of two steel beams comprises a first layer of upper steel beams and a first layer of lower steel beams, each external wall panel comprises a first layer of wall panel and total n-1 layers of standard layer of wall panels, the height of each first layer of wall panel is matched with the height of each first layer of steel columns, the height of each n layers of standard layer of wall panels is matched with the height of each n layers of standard layer of steel columns,
Each external wall panel is formed by vertically connecting a group of external wall panel units in parallel along the outer side of the structural frame, the external connection assembly comprises a group of external connection supporting plates corresponding to each external wall panel unit one by one, the external connection supporting plates are divided into an upper supporting plate and a lower supporting plate which are arranged in pairs up and down, each pair of external connection supporting plates is respectively positioned at the upper side and the lower side of the corresponding external wall panel unit,
the externally hung connecting supporting plate comprises a head externally hung connecting supporting plate and a standard externally hung connecting supporting plate,
the head layer outer hanging connection supporting plate comprises a head layer upper supporting plate and a head layer lower supporting plate, the head layer upper supporting plate is fixedly connected with the top side of the head layer column and/or the top side of the head layer upper steel beam, the corresponding head layer lower supporting plate is fixedly connected with the bottom of the head layer column and/or the bottom side of the head layer lower steel beam,
the standard layer outer hanging connection supporting plate is fixedly connected to the top side of the n standard layer columns and/or the top side of the n standard layer steel beams to form an upper supporting plate of the n standard layer wallboards, the lower supporting plate of the n standard layer wallboards is shared with the first upper supporting plate or the upper supporting plate of the n-1 standard layer,
the upper supporting plate and the lower supporting plate have the same structure and comprise a connecting part fixedly connected to the structural frame and an externally hung part of which the cantilever extends out of the outer side surface of the structural frame, the externally hung part is provided with a connecting groove, the connecting groove comprises a long round strip hole edge which is centrally arranged along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part, the long round strip hole edge is vertically arranged in the direction of the external wall plate for two times, namely an upper connecting edge close to the inner part of the rear side and a lower connecting edge close to the edge of the front side,
The external connection assembly also comprises a group of high-strength bolts matched with the external connection supporting plates one by one, the high-strength bolts comprise high-strength screws and nuts, the front half part of the upper side surface of each external wall plate unit is provided with an upper operation groove in the middle, the rear half part of the upper side surface is provided with an upper bolt corresponding to the upper connection edge in the middle in a pre-embedded mode, the rear half part of the lower side surface of each external wall plate unit is provided with a lower operation groove in the middle, the front half part of the lower side surface is provided with a lower bolt corresponding to the lower connection edge in the middle in a pre-embedded mode, the parts of the high-strength screws of the upper bolt and the lower bolt embedded into the external wall plate unit are welded with steel bars in the external wall plate unit into a whole, the heights of the parts of the high-strength screws of the upper bolt and the lower bolt extending out of the external wall plate unit are higher than the thickness of the external connection supporting plates, the top of the upper bolt is inserted into the upper connection edge of the upper supporting plate, the bottom of the lower bolt is inserted into the lower connection edge of the lower supporting plate, the high-strength screws of the upper bolt and the lower bolt are fastened to the surface of the corresponding external connection supporting plate through the nuts,
the high-strength screw of the lower bolt of the upper outer wall plate unit passes through the first upper layer supporting plate or the standard layer hanging connection supporting plate, the nut of the high-strength screw is positioned in the upper operation groove corresponding to the lower outer wall plate unit, the high-strength screw of the upper bolt of the lower outer wall plate unit passes through the first upper layer supporting plate or the standard layer hanging connection supporting plate, and the nut of the high-strength screw is positioned in the lower operation groove corresponding to the upper outer wall plate unit.
The connecting groove further comprises a sliding edge which is communicated with the edge of the long round strip hole and the outer edge of the outer hanging part, so that the connecting groove is L-shaped.
The method for installing the connecting node of the assembled external wall panel comprises the following steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying high-strength screws in corresponding positions when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate at a corresponding position of the structural frame;
hoisting a first external wall panel unit, respectively inserting the upper and lower high-strength screws into the long round bars Kong Bianna of the corresponding externally-hung connecting supporting plates, rechecking the installation position of the external wall panel unit, and fastening the high-strength screws through nuts;
step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant;
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
The first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant is added into the sliding space.
The method for installing the connecting node of the assembled external wall panel comprises the following steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying high-strength screws in corresponding positions when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate at a corresponding position of the structural frame;
hoisting a first external wall panel unit, sliding upper and lower high-strength screws into the long round bars Kong Bianna from the sliding edges respectively, rechecking the installation position of the external wall panel unit, and fastening the high-strength screws through nuts;
step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant;
Two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously sliding the two outer wall plate units into the long round strips Kong Bianna from the sliding edges;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, an adjusting space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant is added into the adjusting space.
The method for installing the connecting node of the assembled external wall panel comprises the following steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying high-strength screws in corresponding positions when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first-layer wall panel, respectively inserting the upper high-strength screw rod and the lower high-strength screw rod into the long round bars Kong Bianna of the hanging connection supporting plates outside the first-layer wall panel, rechecking the installation position of the external wall panel unit, and fastening the high-strength screw rods through nuts;
Step four, hoisting a second external wall panel unit of the first-layer wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant until the first-layer wall panel is installed;
step five, constructing a second layer of structural frame, namely a standard layer, fixedly connecting a standard layer externally hung connection supporting plate at a corresponding position of the standard layer structural frame, hoisting a first external wall plate unit of the standard layer wallboard, respectively inserting an upper high-strength screw rod and a lower high-strength screw rod into a long round bar Kong Bianna of the standard layer externally hung connection supporting plate, rechecking the installation position of the external wall plate unit, and fastening the high-strength screws through nuts;
step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant until the second layer of wall panel is installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
The second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant is added into the sliding space.
The method for installing the connecting node of the assembled external wall panel comprises the following steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying high-strength screws in corresponding positions when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first layer of wall panel, sliding the upper and lower heights Jiang Luogan into the long round strips Kong Bianna from the sliding edges of the hanging connection supporting plates outside the first layer of wall panel respectively, rechecking the installation positions of the external wall panel units, and fastening high-strength screws through nuts;
step four, hoisting a second external wall panel unit of the first-layer wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant until the first-layer wall panel is installed;
Step five, constructing a second layer of structural frame, namely a standard layer, fixedly connecting a hanging connection supporting plate outside the standard layer at a corresponding position of the standard layer structural frame, hoisting a first external wall plate unit of the standard layer wall plate, sliding an upper high-strength screw rod and a lower high-strength screw rod into a long round bar Kong Bianna from sliding edges of the hanging connection supporting plate outside the standard layer respectively, rechecking the installation position of the external wall plate unit, and fastening the high-strength screws through nuts;
step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant until the second layer of wall panel is installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant is added into the sliding space.
The design method of the connecting node of the assembled external wall panel comprises the following design steps:
analyzing the bearing capacity of an external wallboard, and determining building wind load and earthquake action load;
step two, analyzing the bending load bearing capacity of the positive section of the external wall panel: the positive section bending resistance bearing capacity of the external wall panel is calculated according to a formula and is specifically as follows:
wherein: m is the ultimate bending moment of the test piece; f (f) c The axial compressive strength value of the test piece; b is the section width of the test piece; h is a 0 The effective height of the section of the test piece; x is the height of the pressed area of the test piece; a is that s The reinforcement area of the test piece;
step three, analyzing the bearing capacity of the outer wallboard in the inclined section shear:
the oblique section shear bearing capacity of the external wall panel is calculated according to a formula and is specifically as follows:
V＝0.45f t bh 0
wherein: v is a shear force design value; f (f) t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece;
step four, calculating and analyzing the cracking bending moment of the plate section of the external wall plate:
the cracking bending moment of the plate section of the external wall plate is calculated according to the formula and is specifically as follows:
Σm=0 can be obtained from the equilibrium condition of the forces:
reinforcing steel bar stress:wherein the tensile strength of the concrete: f (f) t ≈0.105f c ；
f t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece; h is the height of the section of the test piece; m is M cr Is a cracking bending moment; e (E) s Is the elastic modulus of the steel bar; epsilon s Is the strain of the steel bar; e (E) c Is the elastic modulus of the concrete;
step five, calculating and analyzing the section ductility of the external wall panel:
section displacement ductility coefficient mu of external wall panel Δ The calculation according to the formula is as follows:
μ Δ ＝Δ u /Δ y
Δ u the displacement is limited for the section of the external wall panel; delta y Is the limit displacement of the section of the external wall panel.
The design steps are as follows:
step six, stress analysis of the external wall panel connection node:
the high-strength bolt carries out bearing capacity checking calculation according to the following formula:
step a: the high-strength bolt bearing tension on the external wall panel is calculated according to the following steps:
wherein:
the N-high-strength bolt bears a tensile force design value, and the unit is N;
-the tension value of a single high-strength bolt, in N;
n-total number of bolts on the external wall panel;
step b: the high-strength bolts on the external wall panels bear shearing force and are calculated according to the following steps:
wherein:
V x 、V y -the x, y shear values assumed by the external wall panel, unit N;
n-total number of bolts on the external wall panel;
N v -shear force value, in N, experienced by a single high-strength bolt;
step c: when the high-strength bolts on the external wall plates bear shearing force between friction surfaces and axial tension of bolt rods, the maximum bearing capacity of the high-strength bolts meets the following formula:
Wherein:
N v 、N t -shear and tension values, respectively, to which a single high-strength bolt is subjected, unit N;
-a design value of shear and tensile load capacity of the high-strength bolt, in N;
step seven, obtaining a period reduction coefficient:
and carrying out anti-side rigidity checking calculation on the structural frame, the external wall board and the structural frame in flexible connection and the external wall board and the structural frame in rigid connection respectively to obtain a period reduction coefficient:
when the external wall panel is fixed in a mode of not interfering with the deformation of the structural frame, taking 0.9-1.0;
when the external wall panel is flexibly connected with the structural frame, 0.8 to 0.9 is taken;
when the external wall panel is rigidly connected with the structural frame, 0.6 to 0.8 of the external wall panel is taken;
the interval value modes in the three cases are as follows: the small value is taken when the influence on the main structure is small, and the large value is taken when the influence is large.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
1. according to the invention, holes are not required to be drilled or drilled on the existing autoclaved aerated concrete wallboard, and the outer wallboard is welded and connected with the frame structure by using the designed externally hung connecting assembly, so that the technical problems of serious disasters caused by damage and stress concentration of the autoclaved aerated concrete externally hung wallboard and shearing damage caused by stress concentration are avoided, and the aerated concrete externally hung wallboard is easy to fall off in the earthquake process; the technical problem that the heat insulation performance of the wallboard is affected due to the fact that a cold bridge is easily formed by the traditional nodes is solved.
2. The wallboard is convenient to install and simple to construct, the high-strength screw is embedded in the wallboard, the externally-hung connecting supporting plate is fixedly connected to the frame structure, the high-strength screw is used for limiting and left and right adjustment in the connecting groove on the externally-hung connecting supporting plate, the wallboard is neat to install, and the stress is reliable.
3. The invention analyzes the connecting node and the external wall panel under the interlayer displacement action and the acceleration action along the wall panel direction, and the result shows that the connecting node is connected reliably, thereby effectively ensuring that the wall panel does not fall off and reducing the stress of the wall panel.
4. The invention researches the influence of the connection mode adopted by the external wall panel and the main body structure on the cycle reduction coefficient of the structure, analyzes the rigidity change of the rigid connection of the wallboard without the wallboard and the main body structure and the flexible connection of the wallboard and the main body structure, and obtains the cycle reduction coefficient of the steel structure corresponding to different connection modes, thereby being convenient for engineering application.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a backside structure of a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a front structure of a first embodiment of the present invention.
Fig. 3 is a schematic top partial structure of fig. 2.
Fig. 4 is a schematic diagram of the structure of fig. 3 in a disassembled state.
Fig. 5 is a partially exploded view of the bottom side of fig. 2.
Fig. 6 is a schematic view of a front top side partial structure of a second embodiment of the present invention.
Fig. 7 is a schematic view of a partial structure of a front bottom side according to a second embodiment of the present invention.
Fig. 8 is a schematic diagram of the structure of fig. 6 in a disassembled state.
Fig. 9 is a schematic diagram of the structure of fig. 7 in a disassembled state.
Fig. 10 is a schematic diagram of a backside structure of a third embodiment of the present invention.
Fig. 11 is a schematic view of the back side structure of the head layer of fig. 10.
Fig. 12 is a schematic view of the front side structure of the first layer of fig. 10.
Fig. 13 is a schematic top partial structure of the first layer and the standard layer.
Fig. 14 is a schematic diagram of the structure of fig. 13 in a disassembled state.
Fig. 15 is a partially exploded view of the bottom side of the first layer of fig. 12.
Fig. 16 is a schematic view of a partial structure of the bottom side of the first layer of fig. 12.
Fig. 17 is a schematic view of a partial structure of the bottom side of the standard layer of fig. 10.
Fig. 18 is a schematic view of the back side of the exterior wallboard connection of the first and standard layers.
Fig. 19 is a schematic view of the front side of the exterior wallboard connection of the first and standard layers.
Fig. 20 is a bottom view schematic of the exterior wall panel connection split of the first and standard layers.
Fig. 21 is a top view schematic of the exterior wallboard joint splitting of the first and standard layers.
Fig. 22 is a schematic side view of the exterior wall panel connection of the first and standard layers.
Fig. 23 is a schematic top partial structure of the first layer and the standard layer according to the fourth embodiment of the present invention.
Fig. 24 is a schematic view of a first method of edge joining exterior wallboard elements.
Fig. 25 is a schematic view of a second method of edge joining exterior wallboard elements.
Reference numerals: 1-side fascia, 11-first wallboard, 12-standard layer wallboard, 2-steel column, 21-first steel column, 22-standard layer steel column, 3-girder, 31-upper girder, 32-lower girder, 31 a-first upper girder, 32 a-first lower girder, 4-externally hung connection support plate, 4 a-connection part, 4 b-externally hung part, 4 c-long round hole side, 4 d-upper connection side, 4 e-lower connection side, 4 f-sliding side, 41-upper support plate, 42-lower support plate, 41 a-first upper support plate, 42 a-first lower support plate, 5-high strength bolt, 5 a-high strength screw, 5 b-nut, 51-upper bolt, 52-lower bolt, 6-upper operation groove, 7-lower operation groove and 8-sealant.
Detailed Description
An embodiment is shown in fig. 1-2, and is a connection node of assembled side fascia, is used for single-layer building, includes the structural frame and through the outer wallboard of outer wall plate of outer surface of external connection at the structural frame of external connection subassembly fixed connection, the structural frame includes one deck steel column 2 and twice girder steel 3, the girder steel includes the upper girder steel 31 of connecting between the steel column top and connects the girder steel 32 down between the steel column bottom, the side fascia 1 is formed along the vertical parallel connection in the outside of structural frame by a set of side fascia unit, and the height of side fascia suits with the height of structural frame.
Referring to fig. 1-5, the externally hung connection assembly comprises a group of externally hung connection supporting plates 4 corresponding to the external wall panel units one by one, the externally hung connection supporting plates are arranged in pairs up and down, each pair of externally hung connection supporting plates are respectively located at the upper side and the lower side of the corresponding external wall panel unit, the externally hung connection supporting plates comprise an upper supporting plate 41 and a lower supporting plate 42, the upper supporting plate 41 is fixedly connected to the top side of the column and/or the top side of the upper steel beam, and the corresponding lower supporting plate 42 is fixedly connected to the bottom of the column and/or the bottom side of the lower steel beam.
The upper support plate 41 and the lower support plate 42 have the same structure, and each of the upper support plate 41 and the lower support plate 42 comprises a connecting part 4a fixedly connected to the structural frame and an externally hung part 4b extending out of the outer side surface of the structural frame, wherein a connecting groove is formed in the externally hung part, and the connecting groove comprises a long round strip hole edge 4c which is formed in the middle along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part.
The external connection assembly further comprises a group of high-strength bolts 5 which are matched with the external connection supporting plates one by one, each high-strength bolt comprises a high-strength screw rod 5a and a nut 5b, an upper bolt 51 is embedded in the middle position of the upper side of each external wall plate unit, a lower bolt 52 is embedded in the middle position of the lower side of each external wall plate unit, the parts, embedded into the external wall plate units, of the high-strength screw rods 5a of the upper bolts 51 and the lower bolts 52 are welded with steel bars in the external wall plate units into a whole, the height of the parts, extending out of the external wall plate units, of the high-strength screw rods 5a of the upper bolts 51 and the lower bolts 52 is higher than the thickness of the external wall plate units, and the parts are inserted into long round hole edges 4c on the upper supporting plates 41 and the lower supporting plates 42 respectively and fastened to the surface of the external connection supporting plates 4 through the nuts 5b respectively.
The installation method of the connecting node of the assembled external wall panel comprises the following installation steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying the high-strength screw 5a in the corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate 4 at a corresponding position of the structural frame;
hoisting a first external wall panel unit, respectively inserting the upper and lower heights Jiang Luogan a into the long round hole edges 4c of the corresponding externally-hung connecting supporting plates, rechecking the installation position of the external wall panel unit, and fastening the high-strength screw 5a through the nuts 5 b;
step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant 8;
two adjacent external wall panel units in the same plane are installed in sequence;
referring to fig. 24-25, two adjacent exterior wall panel units in different planes at a structural corner position are installed:
the first method is as follows: cutting the edges of the external wall panel units at the corners by an angle of 45 degrees, and then simultaneously hanging the two external wall panel units into the long round strip hole edge 4 c;
The second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant 8 is added into the sliding space.
6-9, unlike the first embodiment, the connecting slot further includes a sliding edge 4f connecting one end of the oblong hole edge 4c with the outer edge of the external hanging portion, so that the connecting slot is L-shaped.
The installation method of the connecting node of the assembled external wall panel comprises the following installation steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying the high-strength screw 5a in the corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate 4 at a corresponding position of the structural frame;
hoisting a first external wall panel unit, sliding the upper and lower heights Jiang Luogan a into the long round hole edges 4c from the sliding edges 4f respectively, rechecking the installation position of the external wall panel unit, and fastening the high-strength screw 5a through the nuts 5 b;
Step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant 8;
two adjacent external wall panel units in the same plane are installed in sequence;
referring to fig. 24-25, two adjacent exterior wall panel units in different planes at a structural corner position are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously sliding the two outer wall plate units into the long round strips Kong Bianna from the sliding edges;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, an adjusting space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant 8 is added into the adjusting space.
10-17, a connection node of an assembled external wallboard is used for a multi-storey building, and comprises a structural framework and n layers of external wallboards fixedly connected to the outer side surface of the structural framework through externally hung connection components, wherein n is more than or equal to 2, the structural framework comprises n layers of steel columns 2 and n+1 layers of steel beams 3, each steel column comprises a first layer of steel columns 21 and n-1 layers of standard layer steel columns 22, each steel beam comprises two first layers of steel beams and n-1 layers of standard layer steel beams, each first layer of steel beams comprises an upper first layer of steel beams 31a and a lower first layer of steel beams 32a, each external wallboard comprises a first layer of wallboards 11 and n-1 layers of standard layer of wallboards 12, the height of each first layer of wallboards 11 is matched with the height of each first layer of steel columns 21, and the height of n layers of standard layer of wallboards 12 is matched with the height of n layers of standard layer of steel columns 22.
Each outer wallboard is formed by vertically connecting a group of outer wallboard units in parallel along the outer side of the structural frame, the externally hung connecting assembly comprises a group of externally hung connecting supporting plates 4 corresponding to each outer wallboard unit one by one, the externally hung connecting supporting plates are divided into an upper supporting plate 41 and a lower supporting plate 42 which are arranged in pairs up and down, and each pair of externally hung connecting supporting plates are respectively positioned on the upper side and the lower side of the corresponding outer wallboard unit.
The externally hung connection supporting plate 4 comprises a head externally hung connection supporting plate and a standard externally hung connection supporting plate.
Referring to fig. 11-16, the hanging connection support plate outside the head layer includes a head layer upper support plate 41a and a head layer lower support plate 42a, where the head layer upper support plate 41a is fixedly connected to the top side of the head layer column and/or the top side of the head layer upper steel beam, and the corresponding head layer lower support plate 42a is fixedly connected to the bottom of the head layer column and/or the bottom side of the head layer lower steel beam.
Referring to fig. 13, 14 and 17, the standard layer external hanging connection supporting plate 43 is fixedly connected to the top side of the n standard layer columns and/or the top side of the n standard layer steel beams to form an upper supporting plate of the n standard layer wallboards, and the lower supporting plate of the n standard layer wallboards is shared with the first upper supporting plate or the upper supporting plate of the n-1 standard layer.
Referring to fig. 18-22, the upper support plate 41 and the lower support plate 42 have the same structure, and each of the upper support plate 41 and the lower support plate 42 includes a connecting portion 4a fixedly connected to the structural frame and an outer hanging portion 4b with a cantilever extending out of the outer side surface of the structural frame, the outer hanging portion is provided with a connecting groove, the connecting groove includes a long round hole edge 4c centrally provided along the width direction of the external wall panel and parallel to the outer edge of the outer hanging portion, and two long round hole edges are provided in the direction perpendicular to the external wall panel, and are respectively an upper connecting edge 4d near the inside of the rear side and a lower connecting edge 4e near the edge of the front side.
Referring to fig. 18-22, the plug-in connection assembly further includes a set of high-strength bolts 5 that are in one-to-one fit with the plug-in connection supporting plates, the high-strength bolts include high-strength screws 5a and nuts 5b, the front half of the upper side surface of each external wall plate unit is centrally opened with an upper operation groove 6, the rear half of the upper side surface is centrally pre-buried with an upper bolt 51 corresponding to the upper connection side, the rear half of the lower side surface of each external wall plate unit is centrally opened with a lower operation groove 7, the front half of the lower side surface is centrally pre-buried with a lower bolt 52 corresponding to the lower connection side, the parts of the upper bolt 51 and the high-strength screws 5a of the lower bolt 52 embedded in the external wall plate units are welded with the steel bars inside the external wall plate units into a whole, the heights of the parts of the upper bolt 51 and the lower bolt 52 extending out of the external wall plate units are higher than the thickness of the plug-in connection supporting plates 4, the tops of the upper bolt 51 are inserted into the upper connection side 4d of the upper supporting plates 41, the bottoms of the lower bolt 52 are inserted into the lower side 4e of the lower connection supporting plates 42, the upper bolt 51 and the high-strength screws 5a are fastened to the corresponding surfaces of the plug-in the corresponding nuts 4 b.
Referring to fig. 18 to 22, the high-strength screw 5a of the lower bolt 52 of the upper outer wall plate unit passes through the first upper support plate 41a or the standard outer hanging support plate 43, the nut 5b thereof is positioned in the upper operation groove 6 corresponding to the lower outer wall plate unit, the high-strength screw 5a of the upper bolt 51 of the lower outer wall plate unit passes through the first upper support plate 41a or the standard outer hanging support plate 43, and the nut 5b thereof is positioned in the lower operation groove 7 corresponding to the upper outer wall plate unit.
The installation method of the connecting node of the assembled external wall panel comprises the following installation steps:
firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying the high-strength screw 5a in the corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first-layer wall panel 11, respectively inserting the upper and lower heights Jiang Luogan a into the long round hole edges 4c of the first-layer external wall panel hanging connection supporting plates, rechecking the installation positions of the external wall panel units, and fastening the high-strength screw rods 5a through nuts 5 b;
step four, hoisting a second external wall panel unit of the first-layer wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant until the first-layer wall panel is installed;
step five, constructing a second layer of structural frame, namely a standard layer, fixedly connecting a standard layer externally hung connection supporting plate 43 at a corresponding position of the standard layer structural frame, hoisting a first external wall plate unit of the standard layer wall plate 12, respectively inserting an upper high-strength screw rod and a lower high-strength screw rod into a long round hole edge 4c of the standard layer externally hung connection supporting plate 43, rechecking the installation position of the external wall plate unit, and fastening the high-strength screw rods 5a through nuts 5 b;
Step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting the joint between two adjacent external wall panel units through sealant 8 until the second layer of wall panel is installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
referring to fig. 24-25, two adjacent exterior wall panel units in different planes at a structural corner position are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant 8 is added into the sliding space.
Fourth embodiment referring to fig. 23, unlike the third embodiment,
the connecting groove also comprises a sliding edge 4f which is communicated with one end of the long round strip hole edge 4c and the outer edge of the externally hung part, so that the connecting groove is L-shaped.
The installation method of the connecting node of the assembled external wall panel comprises the following installation steps:
Firstly, designing and prefabricating the size and the number of the external wall panel units according to the size of the structural frame, and burying the high-strength screw 5a in the corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first-layer wall panel 11, sliding the upper and lower high Jiang Luogan a parts from the sliding edges 4f of the first-layer external wall panel hanging connection supporting plates into the long round hole edges 4c respectively, rechecking the installation position of the external wall panel unit, and fastening the high-strength screw 5a through the nuts 5 b;
step four, hoisting a second external wall panel unit of the first-layer wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant 8 until the first-layer wall panel is installed;
step five, constructing a second layer of structural frame, namely a standard layer, fixedly connecting a standard layer externally hung connection supporting plate 43 at a corresponding position of the standard layer structural frame, hoisting a first external wall plate unit of the standard layer wall plate 12, sliding an upper high-strength screw rod and a lower high-strength screw rod Jiang Luogan a into a long round hole edge 4c from a sliding edge 4f of the standard layer externally hung connection supporting plate 43 respectively, rechecking the installation position of the external wall plate unit, and fastening the high-strength screw rods 5a through nuts 5 b;
Step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting the joint between two adjacent external wall panel units through sealant 8 until the second layer of wall panel is installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
referring to fig. 24-25, two adjacent exterior wall panel units in different planes at a structural corner position are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant 8 is added into the sliding space.
The design method of the connecting node of the assembled external wall panel in the four embodiments comprises the following design steps:
analyzing the bearing capacity of an external wallboard, and determining building wind load and earthquake action load;
step two, analyzing the bending load bearing capacity of the positive section of the external wall panel:
Because autoclaved lightweight aerated concrete and common concrete are different in composition materials, the products have great difference in mechanical basic properties. Therefore, the normal section bending-resistant bearing capacity formula of the common concrete needs to be modified to a certain extent to be suitable for calculation of aerated concrete, and the normal section bending-resistant bearing capacity formula of the flexural member is generally based on the following important assumption: (1) flat section presumes: when the test piece bears a pure bending moment, the section is still a plane after rotating along a neutral axis; (2) stress-strain relationship of steel bar: the stress-strain curve adopts an ideal elastic-plastic model, and simultaneously ignores the influence of the steel bars in the pressed area on the bending-resistant bearing capacity of the section; (3) stress-strain relationship of aerated concrete: the stress-strain curve adopts a constitutive model in the specification, and after the plate is cracked, the tensile contribution of the aerated concrete is not considered.
Further according to the concrete structural design Specification (GB 50010-2010) and the autoclaved aerated concrete building application technical Specification (JGJ/T17-2008), the positive section bending resistance bearing capacity of the external wall panel is calculated according to the formula as follows:
wherein: m is the pole of the test pieceBending moment limiting; f (f) c The axial compressive strength value of the test piece; b is the section width of the test piece; h is a 0 The effective height of the section of the test piece; x is the height of the pressed area of the test piece; a is that s The reinforcement area of the test piece; the formula considers the contribution of the aerated concrete in the tension zone and the contribution of the steel bars in the compression zone, and the formula directly omits the influence of the steel bars in the compression zone on the bending bearing capacity.
Step three, analyzing the bearing capacity of the outer wallboard in the inclined section shear:
the autoclaved aerated concrete slab is not provided with stirrups and bending steel bars, so the shearing bearing capacity of the slab is mainly provided by the aerated concrete and longitudinal bars. Therefore, the aerated concrete plate with lower shear strength is not only purely bent and broken, but also bent and sheared and broken under the action of concentrated force load, so that whether the shearing bearing capacity of the test piece can meet the basic requirement is required to be verified.
Further according to the national specification of autoclaved aerated concrete application technical Specification, the inclined section shear bearing capacity of the external wall panel is calculated according to the formula as follows:
V＝0.45f t bh 0
wherein: v is a shear force design value; f (f) t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece;
step four, calculating and analyzing the cracking bending moment of the plate section of the external wall plate:
When the strain value of the aerated concrete reaches the limit tensile strain epsilon bt=epsilon tu, the aerated concrete in the tension zone cracks and exits the work. According to the specification, the concrete strain of the section of the bent plate before the cracking load is still distributed linearly and is distributed linearly in a triangle shape. The cracking bending moment of the section of the plate of the external wall panel which is obtained in the 7.1 th section in the specification of the design Specification of concrete structures (GB 50010-2010) is calculated according to the formula:
from the equilibrium condition of the forces, σM can be obtained C ＝0：
Reinforcing steel bar stress:wherein the tensile strength of the concrete: f (f) t ≈0.105f c ；
f t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece; h is the height of the section of the test piece; m is M cr Is a cracking bending moment; e (E) s Is the elastic modulus of the steel bar; epsilon s Is the strain of the steel bar; e (E) c Is the elastic modulus of the concrete;
step five, calculating and analyzing the section ductility of the external wall panel:
besides indexes such as cracking load, shearing bearing capacity, bending bearing capacity and the like of the aerated concrete slab, the ductility coefficient is also one of important coefficients for measuring the performance of the slab. The ductility coefficient is the deflection corresponding to the limit load divided by the deflection corresponding to the yield load, reflects the deformation capacity of the test piece under the earthquake action,
Section displacement ductility coefficient mu of external wall panel Δ The calculation according to the formula is as follows:
μ Δ ＝Δ u /Δ y
Δ u the displacement is limited for the section of the external wall panel; delta y Is the limit displacement of the section of the external wall panel.
The design steps are as follows:
step six, stress analysis of the external wall panel connection node:
the high-strength bolts in the connecting nodes of the external wall boards are subjected to the gravity and horizontal shearing force of the external wall boards simultaneously, and the high-strength bolts carry out bearing capacity checking according to the following formula:
step a: the high-strength bolt bearing tension on the external wall panel is calculated according to the following steps:
wherein:
the N-high-strength bolt bears a tensile force design value, and the unit is N;
-the tension value of a single high-strength bolt, in N;
n-total number of bolts on the external wall panel;
step b: the high-strength bolts on the external wall panels bear shearing force and are calculated according to the following steps:
wherein:
V x 、V y -the x, y shear values assumed by the external wall panel, unit N;
n-total number of bolts on the external wall panel;
N v -shear force value, in N, experienced by a single high-strength bolt;
step c: when the high-strength bolts on the external wall plates bear shearing force between friction surfaces and axial tension of bolt rods, the maximum bearing capacity of the high-strength bolts meets the following formula:
wherein:
N v 、N t -shear and tension values, respectively, to which a single high-strength bolt is subjected, unit N;
-a design value of shear and tensile load capacity of the high-strength bolt, in N;
step seven, obtaining a period reduction coefficient:
and carrying out anti-side rigidity checking calculation on the structural frame, the external wall board and the structural frame in flexible connection and the external wall board and the structural frame in rigid connection respectively to obtain a period reduction coefficient:
when the external wall panel is fixed in a mode of not interfering with the deformation of the structural frame, taking 0.9-1.0;
when the external wall panel is flexibly connected with the structural frame, 0.8 to 0.9 is taken;
when the external wall panel is rigidly connected with the structural frame, 0.6 to 0.8 of the external wall panel is taken;
the interval value modes in the three cases are as follows: the small value is taken when the influence on the main structure is small, and the large value is taken when the influence is large.

Claims (8)

1. The utility model provides a connected node of assembled side fascia which characterized in that: comprises a structural frame and a total n-layer external wall panel fixedly connected to the outer side surface of the structural frame through an externally hung connecting component, wherein n is more than or equal to 2, the structural frame comprises a total n-layer steel column (2) and a total n+1 steel beam (3), the steel column comprises a first-layer steel column (21) and a total n-1 standard layer steel column (22), the steel beam comprises a first-layer two-layer steel beam and a total n-1 standard layer steel beam, the first-layer two-layer steel beam comprises a first-layer upper steel beam (31 a) and a first-layer lower steel beam (32 a), the external wall panel comprises a first-layer wall panel (11) and a total n-1 standard layer wall panel (12), the height of the first-layer wall panel (11) is matched with the height of the first-layer steel column (21), the height of the n standard layer wall panel (12) is matched with the height of the n standard layer steel column (22),
Each external wall panel is formed by vertically connecting a group of external wall panel units in parallel along the outer side of the structural frame, the external wall panel connecting assembly comprises a group of external wall panel connecting supporting plates (4) corresponding to each external wall panel unit one by one, the external wall panel connecting supporting plates are divided into an upper supporting plate and a lower supporting plate which are arranged in pairs up and down, each pair of external wall panel connecting supporting plates are respectively positioned at the upper side and the lower side of the corresponding external wall panel unit,
the externally hung connecting supporting plate (4) comprises a head externally hung connecting supporting plate and a standard externally hung connecting supporting plate,
the head layer externally hung connection supporting plate comprises a head layer upper supporting plate (41 a) and a head layer lower supporting plate (42 a), the head layer upper supporting plate (41 a) is fixedly connected to the top side of the head layer column and/or the top side of the head layer upper steel beam, the corresponding head layer lower supporting plate (42 a) is fixedly connected to the bottom of the head layer column and/or the bottom side of the head layer lower steel beam,
the standard layer externally-hung connecting supporting plate (43) is fixedly connected to the top side of the n-th standard layer column and/or the top side of the n-th standard layer steel beam to form an upper supporting plate of the n-th standard layer wallboard, the lower supporting plate of the n-th standard layer wallboard is shared with the first upper supporting plate or the upper supporting plate of the n-1 standard layer,
the upper supporting plate and the lower supporting plate have the same structure and comprise a connecting part (4 a) fixedly connected to the structural frame and an externally hung part (4 b) of which the cantilever extends out of the outer side surface of the structural frame, the externally hung part is provided with a connecting groove, the connecting groove comprises a long round strip hole edge which is centrally arranged along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part, the long round strip hole edge is perpendicular to the external wall plate, two paths of connecting edges are respectively an upper connecting edge (4 d) close to the inner part of the rear side and a lower connecting edge (4 e) close to the edge of the front side,
The externally hung connecting assembly further comprises a group of high-strength bolts (5) which are matched with the externally hung connecting supporting plates one by one, the high-strength bolts comprise high-strength screws (5 a) and nuts (5 b), an upper operation groove (6) is formed in the front half part of the upper side surface of each external wall board unit in a centering manner, an upper bolt (51) corresponding to the upper connecting edge is pre-buried in the rear half part of the upper side surface in a centering manner, a lower operation groove (7) is formed in the rear half part of the lower side surface of each external wall board unit in a centering manner, a lower bolt (52) corresponding to the lower connecting edge is pre-buried in the front half part of the lower side surface in a centering manner, the parts of the high-strength screw rods (5 a) of the upper bolt (51) and the lower bolt (52) embedded into the outer wall plate unit are welded with the steel bars inside the outer wall plate unit into a whole, the height of the parts of the high-strength screw rods (5 a) of the upper bolt (51) and the lower bolt (52) extending out of the outer wall plate unit is higher than the thickness of the externally hung connecting supporting plate (4), the top of the upper bolt (51) is inserted into the upper connecting edge (4 d) of the upper supporting plate, the bottom of the lower bolt (52) is inserted into the lower connecting edge (4 e) of the lower supporting plate, the high-strength screw rods (5 a) of the upper bolt (51) and the lower bolt (52) are fastened to the surface of the corresponding externally hung connecting supporting plate (4) through respective nuts (5 b),
the high-strength screw (5 a) of the lower bolt (52) of the upper outer wall plate unit passes through the first upper support plate (41 a) or the standard layer externally-hung connection support plate (43), the nut (5 b) of the high-strength screw is positioned in the upper operation groove (6) corresponding to the lower outer wall plate unit, the high-strength screw (5 a) of the upper bolt (51) of the lower outer wall plate unit passes through the first upper support plate (41 a) or the standard layer externally-hung connection support plate (43), and the nut (5 b) of the high-strength screw is positioned in the lower operation groove (7) corresponding to the upper outer wall plate unit.
2. The connection node of a fabricated side fascia according to claim 1, wherein: the connecting groove also comprises a sliding edge (4 f) which is communicated with one end of the long round bar hole edge and the outer edge of the outer hanging part, so that the connecting groove is L-shaped.
3. A method of installing a connection node of a fabricated side fascia according to claim 1, characterized by the steps of:
firstly, designing and prefabricating the size and the number of external wall panel units according to the size of a structural frame, and burying a high-strength screw (5 a) in a corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first-layer wall panel (11), respectively inserting the upper and lower heights Jiang Luogan (5 a) into long round hole edges (4 c) of the first-layer external hanging connecting supporting plate, rechecking the installation position of the external wall panel unit, and fastening a high-strength screw (5 a) through a nut (5 b);
step four, hoisting a second external wall panel unit of the first-layer wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant until the first-layer wall panel is installed;
Step five, constructing a second layer of structure frame, namely a standard layer, fixedly connecting a standard layer externally hung connecting supporting plate (43) at a corresponding position of the standard layer structure frame, hoisting a first external wall plate unit of a standard layer wallboard (12), respectively inserting an upper high-strength screw rod and a lower high-strength screw rod into a long round bar hole edge (4 c) of the standard layer externally hung connecting supporting plate (43) by two high-strength screw rods, rechecking the installation position of the external wall plate unit, and fastening a high-strength screw rod (5 a) through a nut (5 b);
step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant (8) until the two layers of wall panels are installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant (8) is added into the sliding space.
4. A method of installing a connection node of a fabricated side fascia according to claim 2, characterized by the steps of:
firstly, designing and prefabricating the size and the number of external wall panel units according to the size of a structural frame, and burying a high-strength screw (5 a) in a corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
secondly, constructing a first-layer structure frame on site, and then fixedly connecting a first-layer outer hanging connection supporting plate on the corresponding position of the first-layer structure frame on site;
hoisting a first external wall panel unit of the first-layer wall panel (11), sliding upper and lower positions Jiang Luogan (5 a) from sliding edges (4 f) of the first-layer external hanging connecting supporting plates into long round bar hole edges (4 c) respectively, rechecking the installation position of the external wall panel unit, and fastening high-strength screws (5 a) through nuts (5 b);
step four, hoisting a second external wall panel unit of the first wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant (8) until the first wall panel is installed;
step five, constructing a second layer of structure frame, namely a standard layer, fixedly connecting a standard layer externally hung connecting supporting plate (43) at a corresponding position of the standard layer structure frame, hoisting a first external wall plate unit of a standard layer wallboard (12), sliding an upper high Jiang Luogan (5 a) and a lower high Jiang Luogan (5 a) into a long round hole edge (4 c) from a sliding edge (4 f) of the standard layer externally hung connecting supporting plate (43) respectively by using two high-strength screws at the upper and lower positions, rechecking the installation position of the external wall plate unit, and fastening the high-strength screws (5 a) through nuts (5 b);
Step six, hoisting a second external wall panel unit of the second layer of wall panel repeatedly, and fixedly connecting joints between two adjacent external wall panel units through sealant (8) until the two layers of wall panels are installed;
step seven, repeating the step five and the step six until all the standard layers are constructed;
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously hanging the two outer wall plate units into a long round bar Kong Bianna;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant (8) is added into the sliding space.
5. A method for installing connecting nodes of assembled external wall panels is characterized by comprising the following steps of,
the connecting node comprises a structural frame and an outer wall plate fixedly connected to the outer side surface of the structural frame through an outer wall plate connecting assembly, the outer wall plate is an autoclaved aerated reinforced concrete wall plate, the structural frame comprises a layer of steel columns (2) and two steel beams (3), each steel beam comprises an upper steel beam (31) connected between the tops of the steel columns and a lower steel beam (32) connected between the bottoms of the steel columns, the outer wall plate (1) is formed by connecting a group of outer wall plate units in parallel vertically along the outer side of the structural frame, the height of the outer wall plate is matched with the height of the structural frame, the outer wall plate connecting assembly comprises a group of outer wall connecting support plates (4) corresponding to the outer wall plate units one by one, the outer wall connecting support plates are arranged in pairs up and down, each outer wall connecting support plate is respectively positioned on the upper side and the lower side of the corresponding outer wall plate unit, each outer wall connecting support plate comprises an upper support plate (41) and a lower support plate (42), the upper steel beam (41) is fixedly connected to the top side of the column bottom and/or the bottom side of the upper steel beam, the corresponding lower support plate (42) is fixedly connected to the bottom side of the column bottom and/or the bottom side of the lower support plate,
The upper supporting plate (41) and the lower supporting plate (42) have the same structure and comprise a connecting part (4 a) fixedly connected to the structural frame and an externally hung part (4 b) of which the cantilever extends out of the outer side surface of the structural frame, the externally hung part is provided with a connecting groove, the connecting groove comprises a long round bar hole edge (4 c) which is centrally arranged along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part,
the externally hung connecting assembly further comprises a group of high-strength bolts (5) which are matched with the externally hung connecting supporting plates one by one, each high-strength bolt comprises a high-strength screw rod (5 a) and a nut (5 b), an upper bolt (51) is embedded in the middle position of the upper side of each external wall plate unit, a lower bolt (52) is embedded in the middle position of the lower side of each external wall plate unit, the parts of the high-strength screw rods (5 a) of the upper bolts (51) and the lower bolts (52) embedded in the external wall plate units are welded with reinforcing steel bars in the external wall plate units into a whole, the heights of the parts of the high-strength screw rods (5 a) of the upper bolts (51) and the lower bolts (52) extending out of the external wall plate units are higher than the thickness of the externally hung connecting supporting plates (4), the parts are respectively inserted into long round hole edges (4 c) on the upper supporting plates (41) and the lower supporting plates (42) and are fastened to the surface of the externally hung connecting supporting plates (4) through the respective nuts (5 b),
firstly, designing and prefabricating the size and the number of external wall panel units according to the size of a structural frame, and burying a high-strength screw (5 a) in a corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
Secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate (4) at a corresponding position of the structural frame;
hoisting a first external wall panel unit, respectively inserting the upper and lower heights Jiang Luogan (5 a) into the long round bar hole edges (4 c) of the corresponding externally-hung connecting supporting plates, rechecking the installation position of the external wall panel unit, and fastening a high-strength screw (5 a) through a nut (5 b);
step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant (8);
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the external wall panel units at the corners by an angle of 45 degrees, and then simultaneously hanging the two external wall panel units into the long round strip hole edges (4 c);
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, a sliding space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant (8) is added into the sliding space.
6. A method for installing connecting nodes of assembled external wall panels is characterized by comprising the following steps of,
The connecting node comprises a structural frame and an outer wall plate fixedly connected to the outer side surface of the structural frame through an outer wall plate connecting assembly, the outer wall plate is an autoclaved aerated reinforced concrete wall plate, the structural frame comprises a layer of steel columns (2) and two steel beams (3), each steel beam comprises an upper steel beam (31) connected between the tops of the steel columns and a lower steel beam (32) connected between the bottoms of the steel columns, the outer wall plate (1) is formed by connecting a group of outer wall plate units in parallel vertically along the outer side of the structural frame, the height of the outer wall plate is matched with the height of the structural frame, the outer wall plate connecting assembly comprises a group of outer wall connecting support plates (4) corresponding to the outer wall plate units one by one, the outer wall connecting support plates are arranged in pairs up and down, each outer wall connecting support plate is respectively positioned on the upper side and the lower side of the corresponding outer wall plate unit, each outer wall connecting support plate comprises an upper support plate (41) and a lower support plate (42), the upper steel beam (41) is fixedly connected to the top side of the column bottom and/or the bottom side of the upper steel beam, the corresponding lower support plate (42) is fixedly connected to the bottom side of the column bottom and/or the bottom side of the lower support plate,
the upper supporting plate (41) and the lower supporting plate (42) have the same structure and comprise a connecting part (4 a) fixedly connected to the structural frame and an externally hung part (4 b) of which the cantilever extends out of the outer side surface of the structural frame, the externally hung part is provided with a connecting groove, the connecting groove comprises a long round bar hole edge (4 c) which is centrally arranged along the width direction of the external wall plate and is parallel to the outer edge of the externally hung part,
The connecting groove also comprises a sliding edge (4 f) which is communicated with one end of the long round bar hole edge and the outer edge of the externally hung part, so that the connecting groove is L-shaped,
the externally hung connecting assembly further comprises a group of high-strength bolts (5) which are matched with the externally hung connecting supporting plates one by one, each high-strength bolt comprises a high-strength screw rod (5 a) and a nut (5 b), an upper bolt (51) is embedded in the middle position of the upper side of each external wall plate unit, a lower bolt (52) is embedded in the middle position of the lower side of each external wall plate unit, the parts of the high-strength screw rods (5 a) of the upper bolts (51) and the lower bolts (52) embedded in the external wall plate units are welded with reinforcing steel bars in the external wall plate units into a whole, the heights of the parts of the high-strength screw rods (5 a) of the upper bolts (51) and the lower bolts (52) extending out of the external wall plate units are higher than the thickness of the externally hung connecting supporting plates (4), the parts are respectively inserted into long round hole edges (4 c) on the upper supporting plates (41) and the lower supporting plates (42) and are fastened to the surface of the externally hung connecting supporting plates (4) through the respective nuts (5 b),
firstly, designing and prefabricating the size and the number of external wall panel units according to the size of a structural frame, and burying a high-strength screw (5 a) in a corresponding position when the external wall panel units are prefabricated; prefabricating the size and the number of the externally hung connecting components matched with each other;
Secondly, constructing a structural frame on site, and fixedly connecting an externally-hung connecting supporting plate (4) at a corresponding position of the structural frame;
hoisting a first external wall panel unit, sliding upper and lower heights Jiang Luogan (5 a) into the long round hole side (4 c) from the sliding side (4 f) respectively, rechecking the installation position of the external wall panel unit, and fastening a high-strength screw (5 a) through a nut (5 b);
step four, hoisting a second external wall panel unit repeatedly, and fixedly connecting the joints between two adjacent external wall panel units through sealant (8);
two adjacent external wall panel units in the same plane are installed in sequence;
when two adjacent external wall panel units with structure corner positions in different planes are installed:
the first method is as follows: cutting the edges of the outer wall plate units at the corners by an angle of 45 degrees, and then simultaneously sliding the two outer wall plate units into the long round strips Kong Bianna from the sliding edges;
the second method is as follows: firstly, one external wall panel unit is installed, then the other external wall panel unit is installed, an adjusting space is reserved at the connecting position of the two external wall panel units, and after the two external wall panel units are installed, sealant (8) is added into the adjusting space.
7. A method of designing a connection node for a fabricated external wall panel according to claim 1 or 2, characterized by the following steps:
Analyzing the bearing capacity of an external wallboard, and determining building wind load and earthquake action load;
step two, analyzing the bending load bearing capacity of the positive section of the external wall panel: the positive section bending resistance bearing capacity of the external wall panel is calculated according to a formula and is specifically as follows:
wherein: m is the ultimate bending moment of the test piece; f (f) c The axial compressive strength value of the test piece; b is the section width of the test piece; h is a 0 The effective height of the section of the test piece; x is the height of the pressed area of the test piece; a is that s The reinforcement area of the test piece;
step three, analyzing the bearing capacity of the outer wallboard in the inclined section shear:
the oblique section shear bearing capacity of the external wall panel is calculated according to a formula and is specifically as follows:
V＝0.45f t bh 0
wherein: v is a shear force design value; f (f) t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece;
step four, calculating and analyzing the cracking bending moment of the plate section of the external wall plate:
the cracking bending moment of the plate section of the external wall plate is calculated according to the formula and is specifically as follows:
Σm=0 can be obtained from the equilibrium condition of the forces:
reinforcing steel bar stress:wherein the tensile strength of the concrete: f (f) t ≈0.105f c ；
f t Designing a value for the tensile strength of the concrete; b is the width of the concrete plate; h is a 0 The effective height of the section of the test piece; h is the height of the section of the test piece; m is M cr Is a cracking bending moment; e (E) s Is the elastic modulus of the steel bar; epsilon s Is the strain of the steel bar; e (E) c Is the elastic modulus of the concrete;
step five, calculating and analyzing the section ductility of the external wall panel:
section displacement ductility coefficient mu of external wall panel Δ The calculation according to the formula is as follows:
μ Δ ＝Δ u /Δ y
Δ u the displacement is limited for the section of the external wall panel; delta y Is the limit displacement of the section of the external wall panel.
8. The method of designing a connection node for a fabricated external wall panel according to claim 7, further comprising the steps of:
step six, stress analysis of the external wall panel connection node:
the high-strength bolt carries out bearing capacity checking calculation according to the following formula:
step a: the high-strength bolt bearing tension on the external wall panel is calculated according to the following steps:
wherein:
n is the design value of the tensile force born by the high-strength bolt, and the unit is N;
-the tension value of a single high-strength bolt, unit N;
n is the total number of bolts on the external wall panel;
step b: the high-strength bolts on the external wall panels bear shearing force and are calculated according to the following steps:
wherein:
V x 、V y -the x, y shear values borne by the external wall panel, unit N;
n is the total number of bolts on the external wall panel;
N v -shear force value, unit N, experienced by a single high-strength bolt;
step c: when the high-strength bolts on the external wall plates bear shearing force between friction surfaces and axial tension of bolt rods, the maximum bearing capacity of the high-strength bolts meets the following formula:
Wherein:
N v 、N t -shear force value and tension force value born by single high-strength bolt respectively, unit N;
-a design value of shear and tensile load capacity of a high-strength bolt, unit N;
step seven, obtaining a period reduction coefficient:
and carrying out anti-side rigidity checking calculation on the structural frame, the external wall board and the structural frame in flexible connection and the external wall board and the structural frame in rigid connection respectively to obtain a period reduction coefficient:
when the external wall panel is fixed in a mode of not interfering with the deformation of the structural frame, taking 0.9-1.0;
when the external wall panel is flexibly connected with the structural frame, 0.8 to 0.9 is taken;
when the external wall panel is rigidly connected with the structural frame, 0.6 to 0.8 of the external wall panel is taken;
the interval value modes in the three cases are as follows: the small value is taken when the influence on the main structure is small, and the large value is taken when the influence is large.
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