CN106193306A - A kind of long-span hangar fringe truss prestressed structural systems and construction method thereof - Google Patents
A kind of long-span hangar fringe truss prestressed structural systems and construction method thereof Download PDFInfo
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- CN106193306A CN106193306A CN201610678210.5A CN201610678210A CN106193306A CN 106193306 A CN106193306 A CN 106193306A CN 201610678210 A CN201610678210 A CN 201610678210A CN 106193306 A CN106193306 A CN 106193306A
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- truss
- gate
- lower boom
- prestressing
- prestressing force
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
- E04B1/1906—Connecting nodes specially adapted therefor with central spherical, semispherical or polyhedral connecting element
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
- E04B7/022—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs consisting of a plurality of parallel similar trusses or portal frames
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B2001/199—Details of roofs, floors or walls supported by the framework
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B2001/1996—Tensile-integrity structures, i.e. structures comprising compression struts connected through flexible tension members, e.g. cables
Abstract
A kind of long-span hangar fringe truss prestressed structural systems and construction method thereof, this structural system includes along hangar three limit spaced roof system support column, it is fixed on the plate rooftop air conditioning unit at roof system support column top, it is positioned at roof system support column side, open limit and along hangar depth direction spaced gate truss support post and the gate truss that is fixed on truss support column top, gate, rooftop air conditioning unit and gate truss are directly connected to, prestressing with bond steel strand wires rope it is provided with in the lower boom of gate truss, prestressing with bond steel strand wires rope completes pre-stretch-draw by the anchored end node and stretching end node being positioned at lower boom two ends respectively, inside the two ends of lower boom, two end outboard bonds sections of prestress steel twist clue are perfused with concrete.Due to the fact that the employing of prestressing with bond technology, use ball, tubular truss can successfully cross over the single span hangar of more than 140m span, drastically increase the technical-economic index of structure.
Description
Technical field
The present invention relates to prestressed structural systems and the construction method thereof of a kind of steel truss, particularly a kind of long-span hangar
The prestress system of fringe truss and construction method thereof.
Background technology
Existing large-scale expanded letter two-shipper position maintenance hangar span be generally 140m～160m, depth be generally 80m～
100m, the most then the situation depending on roof system suspension equipment is generally 24.5m～29.5m.Store door generally individually towards taxiway or
Airplane parking area, accessory occupancy can be in other three, hangar around arranging according to artificial abortion, logistics relation.Two-shipper position hangar span all exceedes
120m, and hangar roof system three side supporting, open, therefore the hangar roof design of large span is always the weight of hangar design
Point and difficult point thereof.
In conventional design, long-span hangar roof system generally individually uses three layer flat plate shaped steel grid structure, three limit in plane
Be provided with armored concrete elastic supports, open without flooring support along structural span direction, open limit use by two Pin greatly across
The space box beam of degree steel truss composition supports roof system rack as edge member.Existing layout of structural system sees Fig. 1, greatly
Door truss is connected by web member and node with rooftop air conditioning unit, and truss element rod member internal force is mainly axle power, so the choosing of its cross section
Type uses all directions to draw, press the steel pipe that bearing capacity is the most identical, and stock utilization is the highest, and technical-economic index is optimal.But large span
Store door truss member internal force is huge, maximum up to 5000 tons, beyond the bearing capacity limit of round steel pipe, thus traditional
Hangar design in, truss cross section, gate type selecting generally individually uses bearing capacity higher H type or box-type section.
The traditional design of gate truss has the following disadvantages:
1. compare round steel pipe cross section, H type or box-type section processing, making and assembled difficulty is big, the cycle is long；
2. bigger constraint internal force in cross section, can be produced, cause the biggest part in cross section for bearing constraint internal force, material profit
Low by rate；
3. cross section panel thickness typically can be more than 60mm, and steel plate is due to rolling reason, and strength retrogression is very big, declines according to intensity
The high-performance steel plate reduced, in addition to expensive, procurement cycle is the longest；
4. truss support post in gate is under the huge counter-force effect of gate truss, can produce huge constraint internal force, reduces big
Door truss support post effectively carries the ability of external load.
Summary of the invention
It is an object of the invention to provide a kind of long-span hangar fringe truss prestressed structural systems and construction method thereof, solve
Certainly existing gate truss exist on-circular cross-section make that difficulty, stock utilization be low, valency ratio undesirable and reduce gate truss and prop up
Hold the technical problem of the ability of the effectively carrying external load of post.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of long-span hangar fringe truss prestressed structural systems, including along hangar three limit spaced roof system support column, solid
It is scheduled on the plate rooftop air conditioning unit at roof system support column top, is positioned at roof system support column side, open limit and along hangar depth
Spaced gate, direction truss support post and be fixed on the gate truss of truss support column top, gate, purlin, described gate
Frame is irregular section space truss, and the top boom number of gate truss is more than lower boom number, and described gate truss includes room
The outermost truss structure of lid steel construction, is provided with prestressing with bond steel strand wires rope in the lower boom of described gate truss, described internal
Prestress steel twist clue completes pre-stretch-draw by the anchored end node and stretching end node being positioned at lower boom two ends respectively, described under
Inside the two ends of chord member, two end outboard bonds sections of prestress steel twist clue be perfused with concrete.
Described gate truss is connected, by web member and corresponding node, the irregular section formed by three Pin plane girders
Space truss, described three Pin plane girders are respectively two Pin prestressing force bilayer truss and Pin truss frame for connectings, three Pin plane girders
Top boom absolute altitude identical, the prestressing force bilayer truss lower boom of prestressing force bilayer truss is sat respectively to corresponding two row gate truss
The top of support column, is provided with prestressing with bond steel strand wires rope in described prestressing force bilayer truss lower boom.
Described gate truss is identical with the absolute altitude of rooftop air conditioning unit, and described truss frame for connecting includes the outermost Pin of rooftop air conditioning unit
Truss, outermost truss structure top boom is identical with prestressing force bilayer pricncipal rafter absolute altitude, outermost truss structure lower boom and prestressing force
In double-deck truss, chord member absolute altitude is identical.
The absolute altitude of described gate truss is higher than the absolute altitude of rooftop air conditioning unit, and described truss frame for connecting includes that rooftop air conditioning unit is
The pressurized shunting top boom set up on the upside of outer truss structure and this outermost truss structure top boom, described pressurized shunts top boom and in advance should
The absolute altitude of power bilayer pricncipal rafter is equal, and this pressurized shunting top boom is connected with outermost truss structure top boom by perpendicular web member,
This pressurized shunting top boom is connected with prestressing force bilayer pricncipal rafter by horizontal web member.
A kind of construction method of long-span hangar fringe truss prestressed structural systems, construction procedure is as follows:
Step one, requires, at the rod member of factory process rooftop air conditioning unit and node, to process gate according to the design of long-span hangar
Truss segmentation are transported to scene；
Step 2, both are connected as one by assembled rooftop air conditioning unit and gate truss；
Both, after together assembled good rooftop air conditioning unit and gate truss are risen to designed elevation, are lifted on by step 3
On roof system support column through pouring and gate truss support post；
Step 4, wears prestressing with bond steel strand wires rope by design requirement in the lower boom of gate truss；
Step 5, is respectively provided with anchored end node and stretching end node at the both ends of lower boom,
Prestressing with bond steel strand wires, after anchorage installation, are carried out repeatedly stretching by step 6, until being stretched to design prestretching
Power；
Prestressing with bond steel strand wires after step 6, for making up loss of prestress, are carried out ultra stretching by step 7；
Step 8, after ultra stretching, irrigates microdilatancy coagulation in the adhesive section that the two ends of the lower boom of gate truss are arranged
Soil.
In described step 4, in being cased with outward during passing the lower boom of gate truss outside prestressing with bond steel strand wires rope
Bushing pipe, the diameter of this internal lining pipe determines according to the diameter of prestressing with bond steel strand wires rope, described prestressing with bond steel strand wires rope
Two ends exceed internal lining pipe, and the outside beyond part is that adhesive section irrigates slightly expanded concrete in step 7.
In described step 5, described stretching end node includes prestressing force bilayer truss lower boom, internal lining pipe, is positioned at node steel
The outside of ball is also fixed on the stretching end head plate of prestressing force bilayer truss lower boom end face, is positioned at the anchorage outside stretching end head plate
And it is enclosed within the protective cover outside anchorage, on the prestressing force bilayer truss lower boom between stretching end head plate and node steel ball
Have grout hole.
In described step 5, described anchored end node includes prestressing force bilayer truss lower boom, internal lining pipe, is positioned at node steel
The outside of ball is also fixed on the anchored end head plate of prestressing force bilayer truss lower boom end face, is positioned at anchored end head plate and node steel ball
Between prestressing force bilayer truss lower boom on have grout hole.
Air-vent is had on the prestressing force bilayer truss lower boom of described adhesive section.
When described prestressing force bilayer truss lower boom passes through the node steel ball of intermediate node, it is positioned under prestressing force bilayer truss
At least twice toroidal membrane it is cased with between the outer wall of the internal lining pipe in the range of the inwall of chord member, node steel ball.
Compared with prior art the invention have the characteristics that and beneficial effect:
Long-span hangar fringe truss prestressed structural systems in the present invention, gate truss and rooftop air conditioning unit no longer pass through web member
Connect with corresponding node, but gate, open for hangar roof system limit Truss Design is become irregular box section, gate truss
Including rooftop air conditioning unit outermost truss structure, the compression boom number arranged of now winding up, more than the number by tension chord, now goes up
String pressurized internal force is disperseed, and its cross section type selecting uses round steel pipe can also meet stress needs.Lower edge two row by tension chord then
Elongated high-strength prestressing with bond steel strand wires are set, and anchored end and stretching end are set at truss two ends, gate, by advance should
Power steel strand wires carry out effective pre-stretch-draw, in addition to setting up pre-stressed state in gate truss and improving its stress performance, internal pre-
Prestress steel strand and lower edge round steel pipe can also form the common stress in compound section, utilize the resistance to tension of high strength steel strand to make up
The deficiency of round steel pipe bearing capacity, makes store door truss top-bottom chord all can use round steel pipe cross section.
First the present invention improves the vertical support rigidity of gate truss compared with traditional method, improves the roof system of its supporting
The stress performance of steel construction；Next effectively reduces the amount of deflection on open limit, roof system gate, meets the suspension equipment operation that roof system is arranged
Demand；Again it is effectively reduced the constraint internal force of gate opening edge truss support post, is effectively improved its energy resisting external load
Power；Simultaneously because the employing of prestressing with bond technology, ball, tubular truss is used can successfully to cross over the single span machine of more than 140m span
Storehouse, drastically increases the technical-economic index of structure.
Accompanying drawing explanation
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is existing structure system layout drawing in background technology.
Fig. 2 is the side-looking structural representation of embodiment one.
Fig. 3 is the side-looking structural representation of embodiment two.
Fig. 4 is the planar structure schematic diagram of embodiment two.
Fig. 5 is A-A cross-sectional view in Fig. 2.
Fig. 6 is B-B cross-sectional view in Fig. 2.
Fig. 7 is the structural representation of stretching end node.
Fig. 8 is the structural representation of anchored end node.
Fig. 9 is the structural representation of intermediate node.
Figure 10 is the cross sectional representation of prestressing force bilayer truss lower boom.
Figure 11 is tradition store door truss calculation diagram.
Figure 12 is tradition store door truss bending moment diagram.
Figure 13 is tradition store door truss amount of deflection figure.
Figure 14 is tradition store door truss support post bending moment diagram under gravity laod operating mode.
Figure 15 is present configuration calculation diagram.
Figure 16 is gate of the present invention truss bending moment diagram.
Figure 17 is store structure amount of deflection figure of the present invention.
Figure 18 is gate of the present invention truss support post bending moment diagram under gravity laod operating mode.
Reference: 1-roof system support column, 2-rooftop air conditioning unit, 3-gate truss support post, 4-gate truss,
Chord member in 5-prestressing force bilayer truss, 5.1-prestressing force bilayer pricncipal rafter, 5.2-prestressing force bilayer truss, 5.3-are pre-
Stress bilayer truss lower boom, 6-toroidal membrane, 7-outermost truss structure, 7.1-outermost truss structure top boom, 7.2-outermost
Truss structure lower boom, 8-pressurized shunting top boom, 9-erect web member, the horizontal web member of 10-, 11-prestressing with bond steel strand wires rope,
12-internal lining pipe, 13-stretching end head plate, 14-anchorage, 15-grout hole, 16-node steel ball, 17-anchored end head plate,
18-air-vent, 19-protective cover.
Detailed description of the invention
Embodiment one is shown in Figure 2, and rooftop air conditioning unit 2 is designed as grid structure, and this long-span hangar fringe truss is pre-
Stress structure system, including along hangar three limit spaced roof system support column 1, the flat board that is fixed on roof system support column 1 top
The grid structure of type, it is positioned at roof system support column 1 side, open limit and props up along hangar depth direction spaced gate truss
Holding post 3 and be fixed on the gate truss 4 at truss support post 3 top, gate, described gate truss 4 is purlin, space, irregular section
Frame, the top boom number of gate truss 4 is more than lower boom number, and described gate truss 4 includes the outermost truss structure of grid structure
7, i.e. outermost truss structure 7 is as a wherein truss structure stress of gate truss, is provided with body in the lower boom of described gate truss
Interior prestress steel twist clue 11, described prestressing with bond steel strand wires rope respectively by be positioned at lower boom two ends anchored end node and
Stretching end node completes pre-stretch-draw, inside the two ends of described lower boom, two end outboard bonds of prestress steel twist clue 11
Section is perfused with concrete.
Described gate truss 4 is connected, by web member and corresponding node, the irregular section formed by three Pin plane girders
Space truss, described three Pin plane girders are respectively two Pin prestressing force bilayer truss 5 and Pin truss frame for connectings, three Pin plane girders
Top boom absolute altitude identical, the prestressing force bilayer truss lower boom 5.3 of prestressing force bilayer truss is sat respectively to corresponding two row gates
The top of truss support post 3, is provided with prestressing with bond steel strand wires rope 11 in described prestressing force bilayer truss lower boom 5.3.
Described gate truss 4 is identical with the absolute altitude of roof system rack, and described truss frame for connecting includes the outermost Pin purlin of roof system rack
Frame 7, the outermost truss structure top boom 7.1 of outermost truss structure 7 and the prestressing force bilayer pricncipal rafter 5.1 of prestressing force bilayer truss
Absolute altitude is identical, the outermost truss structure lower boom 7.2 of outermost truss structure and string in the prestressing force bilayer truss of prestressing force bilayer truss
Bar 5.2 absolute altitude is identical.
Embodiment two is shown in Figure 3, and unlike embodiment one, the absolute altitude of described gate truss 4 is higher than roof system net
The absolute altitude of frame, described truss frame for connecting includes that the outermost truss structure 7 of roof system rack and the outermost truss structure of this outermost truss structure 7 wind up
The pressurized shunting top boom 8 set up on the upside of bar 7.1, described pressurized shunting top boom 8 is double with the prestressing force of prestressing force bilayer truss
The absolute altitude of layer pricncipal rafter 5.1 is equal, and this pressurized shunting top boom 8 is by perpendicular web member 9 with outermost truss structure top boom 7.1 even
Connecing, this pressurized shunting top boom 8 is connected with prestressing force bilayer pricncipal rafter 5.1 by horizontal web member 10.
Seeing shown in Fig. 4-6, the width of hangar is s, and the depth of roof system rack is D1, and height is H2, entering of gate truss 4
Deep is D2, and height is H1.
The construction method of this long-span hangar fringe truss prestressed structural systems, construction procedure is as follows:
Step one, requires, at the rod member of factory process roof system rack and node, to process purlin, gate according to the design of long-span hangar
Frame 4 segmentation are transported to scene.
Step 2, both are connected as one by assembled roof system rack and gate truss 4.
Both, after together assembled good roof system rack and gate truss 4 are risen to designed elevation, are lifted on by step 3
On the roof system support column 1 poured and gate truss support post 4.
Step 4, wears prestressing with bond steel strand wires rope by design requirement in the lower boom of gate truss；
Wherein in step 4, wearing prestressing with bond steel strand wires rope in the lower boom of gate truss by design requirement can be in assembly
While gate truss, it is also possible to rise to after designed elevation in work high above the ground.Prestressing with bond steel strand wires rope 11 is outer through big
Being cased with internal lining pipe 12 outside during the lower boom of door truss, the diameter of this internal lining pipe is straight according to prestressing with bond steel strand wires rope
Footpath determines, the two ends of described prestressing with bond steel strand wires rope 11 exceed internal lining pipe 12, and the outside beyond part is that adhesive section is in step
Slightly expanded concrete is irrigated in rapid seven.See shown in Fig. 7 and Fig. 8, a length of L of described adhesive section.
Step 5, is respectively provided with anchored end node and stretching end node at the both ends of lower boom.
Shown in Figure 7, described stretching end node includes prestressing force bilayer truss lower boom 5.3, internal lining pipe 12, is positioned at joint
Put the outside of steel ball 16 and be fixed on the stretching end head plate 13 of prestressing force bilayer truss lower boom 5.3 end face, be positioned at stretch-draw termination
Anchorage 14 outside plate 13 and be enclosed within the protective cover 19 outside anchorage, between stretching end head plate 13 and node steel ball 16
Grout hole 15 is had on prestressing force bilayer truss lower boom 5.3.
Shown in Figure 8, anchored end node includes prestressing force bilayer truss lower boom 5.3, internal lining pipe 12, is positioned at node steel
The outside of ball 16 is also fixed on the anchored end head plate 17 of prestressing force bilayer truss lower boom 5.3 end face, is positioned at anchored end head plate 17
And having grout hole 15 on the prestressing force bilayer truss lower boom 5.3 between node steel ball 16, the prestressing force of described adhesive section is double
Air-vent 18 is had on layer truss lower boom 5.3.
See shown in Fig. 9-10, when described prestressing force bilayer truss lower boom 5.3 passes through the node steel ball 16 of intermediate node,
Be cased with between the outer wall of the internal lining pipe 12 in the range of the inwall, node steel ball 16 of prestressing force bilayer truss lower boom 5.3 to
Few twice toroidal membrane 6, internal lining pipe 12 is played spacing work inside prestressing force bilayer truss lower boom 5.3 by toroidal membrane
With.
Prestressing with bond steel strand wires, after anchorage installation, are carried out repeatedly stretching by step 6, until being stretched to design
Pretension.
Prestressing with bond steel strand wires after step 5, for making up loss of prestress, are carried out ultra stretching by step 7.
Step 8, after ultra stretching, irrigates microdilatancy in the adhesive section that the two ends of the lower boom of gate truss are arranged
Concrete.
Seeing Fig. 1, the edge member i.e. large span steel truss that tradition open limit, single span store structure gate is arranged is along span
Direction is shown generally as single span simply supported beam, and its calculation diagram as shown in figure 11, can be obtained by the computational methods of structural mechanics
Its moment of flexure and amount of deflection figure, maximum all occurs at span centre, is respectivelyql 2/ 8 and 5ql 4/ (384EI), such as Figure 12-13.
Due to compatibility of deformation, the horizontal thrust that gate truss produces under gravity laod operating mode, can be in gate truss support
The restraining moment produced at the bottom of post postM t, calculation diagram and bending moment diagram such as Figure 14.Prestress wire in gate of the present invention joist body
As shown in figure 15, moment of flexure and amount of deflection layout drawing are shown in that Figure 18 is seen in Figure 16-17, doorjamb bending moment diagram to rope layout drawing.In Figure 11-18, respectively
Individual letter is respectivelyq—Gate truss equivalent uniform load；T—Pretension；l—Hangar span；h—Post is high；EI—Purlin, gate
Frame cross section bending rigidity；M t —Gate truss support post restraining moment under gravity laod operating mode；M pr —Prestressing force is cut down
Gate truss moment of flexure；M i —The moment of flexure that prestressed stretch-draw is cut down；f pr —Gate truss prestressing camber value.
Said structure analysis shows:
The first, for long-span hangar structure, usual gate truss accounts for more than the 40% of whole roof structure deadweight.The present invention is led to
Cross and gate truss lower edge is applied precompression, lower edge bar cross section can be effectively reduced, alleviate dead load；
Second, gate truss lower edge carries out the antiarch value of pre-stretch-draw generationf pr , gate truss amount of deflection more than 30% can be effectively reduced,
Significantly improve the deformation performance of roof system；
3rd, it is huge that gate truss lower edge carries out that pre-stretch-draw can also cut down that gate truss produces under gravity laod effect effectively
Big horizontal thrust, thus cut down more than 80% gate support column restraining moment under gravity laod operating mode, drastically increase
The ability of external load resisted by gate truss；
4th, gate truss lower edge carries out pre-stretch-draw can partly cut down the internal force peak value of gate truss；
In a word, by arranging gate lower edge prestress wire, and it is carried out the most pre-stretch-draw, use bulb truss
Successfully cross over the span of more than 140m, except decreasing roof system steel using amount, and shorten processing, fabrication cycle.
Claims (10)
1. a long-span hangar fringe truss prestressed structural systems, it is characterised in that: include along hangar three limit spaced
Roof system support column (1), it is fixed on the plate rooftop air conditioning unit (2) at roof system support column (1) top, is positioned at roof system support column
(1) side, open limit and along hangar depth direction spaced gate truss support post (3) and be fixed on gate truss
The gate truss (4) at support column (3) top, described gate truss (4) is irregular section space truss, gate truss (4)
Top boom number is more than lower boom number, and described gate truss (4) includes the outermost truss structure (7) of rooftop air conditioning unit (2), described
Being provided with prestressing with bond steel strand wires rope (11) in the lower boom of gate truss, described prestressing with bond steel strand wires rope passes through respectively
The anchored end node and the stretching end node that are positioned at lower boom two ends complete pre-stretch-draw, inside the two ends of described lower boom, prestressing force
Two end outboard bonds sections of steel strand wires rope (11) are perfused with concrete.
Long-span hangar fringe truss prestressed structural systems the most according to claim 1, it is characterised in that: purlin, described gate
The irregular section space truss that frame (4) is consisted of web member and the connection of corresponding node three Pin plane girders, described three
Pin plane girder is respectively two Pin prestressing force bilayer truss (5) and a Pin truss frame for connecting, the top boom absolute altitude of three Pin plane girders
Identical, prestressing force bilayer truss lower boom (5.3) is respectively connecting to the top at corresponding two row gates truss support post (3), described
Prestressing with bond steel strand wires rope (11) it is provided with in prestressing force bilayer truss lower boom (5.3).
Long-span hangar fringe truss prestressed structural systems the most according to claim 2, it is characterised in that: purlin, described gate
Frame (4) is identical with the absolute altitude of rooftop air conditioning unit (2), and described truss frame for connecting includes the outermost truss structure (7) of rooftop air conditioning unit, outermost
Truss structure top boom (7.1) is identical with prestressing force bilayer pricncipal rafter (5.1) absolute altitude, outermost truss structure lower boom (7.2) with
In prestressing force bilayer truss, chord member (5.2) absolute altitude is identical.
Long-span hangar fringe truss prestressed structural systems the most according to claim 2, it is characterised in that: purlin, described gate
The absolute altitude of frame (4) is higher than the absolute altitude of rooftop air conditioning unit (2), and described truss frame for connecting includes the outermost truss structure (7) of rooftop air conditioning unit
Pressurized shunting top boom (8) set up with outermost truss structure top boom (7.1) upside, described pressurized shunting top boom (8) is with pre-
The absolute altitude of stress bilayer pricncipal rafter (5.1) is equal, and this pressurized shunting top boom (8) is by perpendicular web member (9) and outermost Pin purlin
Frame top boom (7.1) connects, and this pressurized shunting top boom (8) is by horizontal web member (10) and prestressing force bilayer pricncipal rafter
(5.1) connect.
5. according to the construction method of the long-span hangar fringe truss prestressed structural systems described in claim 2-4 any one,
It is characterized in that, construction procedure is as follows:
According to the design of long-span hangar, step one, requires that processing is big at the rod member of factory process rooftop air conditioning unit (2) and node
Door truss (4) segmentation are transported to scene；
Step 2, both are connected as one by assembled rooftop air conditioning unit (2) and gate truss (4)；
Both, after together assembled good rooftop air conditioning unit (2) and gate truss (4) are risen to designed elevation, are hung by step 3
It is contained on the roof system support column (1) and gate truss support post (4) poured；
Step 4, wears prestressing with bond steel strand wires rope by design requirement in the lower boom of gate truss；
Step 5, is respectively provided with anchored end node and stretching end node at the both ends of lower boom,
Prestressing with bond steel strand wires, after anchorage installation, are carried out repeatedly stretching by step 6, until being stretched to design prestretching
Power；
Prestressing with bond steel strand wires after step 6, for making up loss of prestress, are carried out ultra stretching by step 7；
Step 8, after ultra stretching, irrigates microdilatancy coagulation in the adhesive section that the two ends of the lower boom of gate truss are arranged
Soil.
The construction method of long-span hangar fringe truss prestressed structural systems the most according to claim 5, it is characterised in that:
In described step 4, prestressing with bond steel strand wires rope (11) outward through during the lower boom of gate truss outer be cased with in
Bushing pipe (12), the diameter of this internal lining pipe determines according to the diameter of prestressing with bond steel strand wires rope, described prestressing with bond steel strand wires
The two ends of rope (11) exceed internal lining pipe (12), and the outside beyond part is that adhesive section irrigates slightly expanded concrete in step 7.
The construction method of long-span hangar fringe truss prestressed structural systems the most according to claim 6, it is characterised in that:
In described step 5, stretching end node includes prestressing force bilayer truss lower boom (5.3), internal lining pipe (12), is positioned at node steel ball
(16) outside is also fixed on the stretching end head plate (13) of prestressing force bilayer truss lower boom (5.3) end face, is positioned at stretch-draw termination
The anchorage (14) in plate (13) outside and be enclosed within the protective cover (19) outside anchorage, is positioned at stretching end head plate (13) and node steel ball
(16) grout hole (15) is had on prestressing force bilayer truss lower boom (5.3) between.
The construction method of long-span hangar fringe truss prestressed structural systems the most according to claim 6, it is characterised in that:
In described step 5, anchored end node includes prestressing force bilayer truss lower boom (5.3), internal lining pipe (12), is positioned at node steel ball
(16) outside is also fixed on the anchored end head plate (17) of prestressing force bilayer truss lower boom (5.3) end face, is positioned at anchoring termination
Grout hole (15) is had on prestressing force bilayer truss lower boom (5.3) between plate (17) and node steel ball (16).
9., according to the construction method of the long-span hangar fringe truss prestressed structural systems described in claim 7 or 8, its feature exists
In: have air-vent (18) on prestressing force bilayer truss lower boom (5.3) of described adhesive section.
10. according to the construction method of the long-span hangar fringe truss prestressed structural systems described in claim 7 or 8, its feature
It is: when described prestressing force bilayer truss lower boom (5.3) passes through node steel ball (16) of intermediate node, is positioned at prestressing force double-deck
It is cased with at least bipassage ring between the outer wall of the internal lining pipe (12) in the range of the inwall of truss lower boom (5.3), node steel ball (16)
Shape dividing plate (6).
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| CN112609837A (en) * | 2020-11-16 | 2021-04-06 | 中国建筑第八工程局有限公司 | Rod supplementing method for chord member with steel strand penetrating inside truss |
| CN112609837B (en) * | 2020-11-16 | 2022-06-14 | 中国建筑第八工程局有限公司 | Method for supplementing chord member with steel strand penetrating through truss |
| CN114293455A (en) * | 2021-10-11 | 2022-04-08 | 郑孝群 | One-pull road bridge and its manufacture and construction |
| CN114575469A (en) * | 2022-05-05 | 2022-06-03 | 中国航空规划设计研究总院有限公司 | Large-span hangar roof suspension equipment node system and installation method thereof |
| CN114575469B (en) * | 2022-05-05 | 2022-07-05 | 中国航空规划设计研究总院有限公司 | Large-span hangar roof suspension equipment node system and installation method thereof |
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