CN107419849A - A kind of space prestressed ring beam of the shape of a saddle - Google Patents
A kind of space prestressed ring beam of the shape of a saddle Download PDFInfo
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- CN107419849A CN107419849A CN201710254714.9A CN201710254714A CN107419849A CN 107419849 A CN107419849 A CN 107419849A CN 201710254714 A CN201710254714 A CN 201710254714A CN 107419849 A CN107419849 A CN 107419849A
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- ring beam
- inner ring
- prestressed
- shape
- saddle
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
-
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The present invention relates to a kind of space prestressed ring beam of shape of a saddle, the space prestressed ring beam of the shape of a saddle is by inner ring beam, outer-ring beam and radial girders composition, inner ring beam is connected by radial girders with outer-ring beam, the inner ring beam is that multispan uiform section continuously becomes absolute altitude prestressed concrete beam, the outer-ring beam is that multispan uiform section continuously becomes absolute altitude reinforced beam, the footpath rib to beam be single span uiform section horizontal reinforcement beams of concrete, ring sets curved prestressing tendon simultaneously in the inner ring beam, straight-line prestressed muscle and regular reinforcement, the arrangement of the inner ring beam presstressed reinforcing steel and regular reinforcement is：After the completion of regular reinforcement arrangement, in the range of the framework of steel reinforcement that regular reinforcement is formed, first straight-line prestressed muscle is evenly arranged along beam section periphery, curved prestressing tendon is arranged between the straight-line prestressed muscle of top layer again, the inner ring beam and outer-ring beam are connected with bottom concrete structure by cast-in-situ steel reinforced concrete bean column node, the cable-membrane analysis is connected with space shape of a saddle ring beam by sliding hinged-support, and the slip hinged-support radial level restraint release, ring horizontal restraint retains.
Description
Technical field
The invention belongs to Structural Engineering prestressing technique field, more particularly to a kind of space prestressed ring beam of the shape of a saddle.
Background technology
With a large amount of constructions of large span spatial structure, the application of prestressed girder gradually increases.In civil engineering structure, in advance should
Power annular girder is using more typically in round building, and prestressed ring beam is more on same horizontal plane, such ring beam
After forming an entirety, itself there is a greater stiffness, to increase after prestressing force be not in larger internal force redistribution, will not be to ring
Beam and other structures produce parasitic moment.But the space prestressed ring beam of the shape of a saddle is multispan uiform section continuously becomes absolute altitude prestressing force and mix
Solidifying Tu Liang, although good appearance, power transmission is clear and definite, shape of a saddle prestressed ring beam integral rigidity deficiency, in advance should in shape of a saddle space
After increasing prestressing force in power ring beam, it may appear that larger Internal Force Redistribution, parasitic moment is produced to ring beam.It is right in structure design at present
There is more requirement in ring beam intensity and toughness, ensure that the hoop effect of ring beam to a certain extent, but because a shape of a saddle space is pre-
NOL ring beam stress state complex, Internal Force Redistribution are larger.How to ensure that shape of a saddle space ring beam has suitable rigidity and resisted
Fragility energy, while and can resistance beam moment of flexure itself and the parasitic moment as caused by prestressing force, are to need to solve the problems, such as in engineering.
The content of the invention
The ring that the cable-membrane analysis of sShape features and shape of a saddle spatial loop beam support for shape of a saddle space structure transmits
Horizontal force, cause shape of a saddle space ring beam insufficient rigidity and there is the problem of larger pulling force and moment of flexure, the present invention proposes one kind
The space prestressed ring beam of the shape of a saddle.This invention ensures that shape of a saddle space ring beam has suitable rigidity, ring beam crack is controlled
Width, and can resistance beam moment of flexure in itself and the parasitic moment as caused by prestressing force.
The present invention relates to a kind of space prestressed ring beam of shape of a saddle, the space prestressed ring beam of the shape of a saddle by inner ring beam,
Outer-ring beam and radial girders composition, inner ring beam are connected by radial girders with outer-ring beam, and the inner ring beam is that multispan uiform section continuously becomes
Absolute altitude prestressed concrete beam, the outer-ring beam are that multispan uiform section continuously becomes absolute altitude reinforced beam, and the footpath rib is to beam
For single span uiform section horizontal reinforcement beams of concrete, ring sets curved prestressing tendon, straight-line prestressed simultaneously in the inner ring beam
Muscle and regular reinforcement, the arrangement of the inner ring beam presstressed reinforcing steel and regular reinforcement are：After the completion of regular reinforcement arrangement, general
In the range of the framework of steel reinforcement that logical reinforcing bar is formed, first straight-line prestressed muscle is evenly arranged along beam section periphery, then curve in advance should
Power muscle is arranged between the straight-line prestressed muscle of top layer, and the inner ring beam and outer-ring beam pass through cast in place reinforced bar with bottom concrete structure
Concrete beam and column node is connected, and the cable-membrane analysis is connected with space shape of a saddle ring beam by sliding hinged-support, the sliding hinge
Bearing radial level restraint release, ring horizontal restraint retain.
Further, the inner ring beam is using hierarchical segmented tensioning, anchoring, and described each section of presstressed reinforcing steel of inner ring beam is adjacent
Tensioning is staggeredly overlapped between two stretching ends, the inner ring beam tension of prestressed tendon end is arranged at reinforced concrete beam column node
/ 5th positions of both sides inner ring beam span, the stretching end pass through to reinforced concrete beam column node both sides inner ring beam span
1/5th in the range of carry out Horizontal hunche and formed.
Further, the strength grade of concrete of the inner ring beam, outer-ring beam and radial girders is C40.
Further, the prestressed ring beam uses post stretching bonded prestress technology, and presstressed reinforcing steel selects underrelaxation
Prestress wire, ultimate strength standard value are 1860MPa.
Further, tension of prestressed tendon proof stress is 1302Mpa, ultra stretching 3 percent during construction.
Beneficial effect
（1）Ring sets curved prestressing tendon, straight-line prestressed muscle simultaneously in the inner ring beam, and wherein curved prestressing tendon solves
Inner ring beam bending resistance problem, straight-line prestressed muscle solve the problems, such as tension.
（2）Presstressed reinforcing steel participates in bearing capacity calculating jointly in regular reinforcement in the inner ring beam, and presstressed reinforcing steel both played
The effect of active force balance, improve the rigidity and cracking resistance of shape of a saddle prestressed ring beam.
（3）The outer-ring beam and radial girders provide effective lateral support effect, outer-ring beam and radial girders for inner ring beam
An entirety is formed with inner ring beam, common stress, the transmission road strength of power is added, has postponed inner ring beam and bottom concrete structure
Connecting node is destroyed.
（4）The inner ring beam ensure that whole inner ring beam using tensioning is staggeredly overlapped between two neighboring stretching end
Stress is continuous, tensioning is continuous.
（5）The stretching end is formed by inner ring beam Horizontal hunche, is improved the rigidity of tensioning end position inner ring beam, is avoided
The too early buckling failure of tensioning end position inner ring beam.Allow tension of prestressed tendon anchoring more convenient simultaneously, more ensure tensioning quality
And safety.
Brief description of the drawings
Fig. 1 is the space prestressed ring beam graphics of the shape of a saddle；
Fig. 2 is the overall structure profile of the space prestressed ring beam of the shape of a saddle；
Fig. 3 is beam side haunch floor plan at inner ring girder tensioning；
Fig. 4 is that presstressed reinforcing steel staggeredly overlaps figure；
Fig. 5 is inner ring beam difference presstressed reinforcing steel arrangement form layout drawing；
Fig. 6 is inner ring beam A presstressed reinforcing steel layout drawings；
Fig. 7 is inner ring beam B presstressed reinforcing steel layout drawings；
Fig. 8 is inner ring beam C presstressed reinforcing steel layout drawings；
Fig. 9 is inner ring beam D presstressed reinforcing steel layout drawings；
Figure 10 is inner ring beam E presstressed reinforcing steel layout drawings；
Figure 11 is inner ring beam curved prestressing tendon curve map；
Figure 12 is inner ring girder tensioning flow；
Figure 13 is inner ring beam grading tension flow chart.
In each accompanying drawing：1 inner ring beam；2 outer-ring beams；3 radial direction girt strips；The space prestressed ring beam of 4 shapes of a saddle；5 inner ring right cylinders；6
Outer shroud batter post；7 slide hinged-support；8 cable-membrane analysis；9 bottom concrete structures；10 straight-line prestressed muscle；11 curved prestressing forces
Muscle；12 regular reinforcements；13 stretching ends.
Embodiment
By taking certain stadium project as an example, to illustrate the space prestressed ring beam of the shape of a saddle of the present invention.
1. decile first arranges more inner ring right cylinders 5 and outer shroud batter post 6, thing is high, and north and south is low, as shown in Figure 1, Figure 2, Fig. 6 institutes
Show.Interior annulated column 5 and outer annulated column 6 are up to 38.5 meters, and minimum 22.7 meters, the 5 maximum discrepancy in elevation of inner ring right cylinder is 15.8 meters, outer shroud
The 6 maximum discrepancy in elevation of right cylinder is 15.8 meters, and the spacing of each inner ring right cylinder 5 is 20 meters, and the spacing of each outer shroud batter post 6 is 22 meters, interior
The minimum range that ring right cylinder 5 pushes up and outer shroud batter post 6 pushes up is 10 meters, and the minimum range at the bottom of inner ring right cylinder 5 and the bottom of outer shroud batter post 6 is 16
Rice.
2. then setting the space prestressed ring beam 4 of the shape of a saddle at the top of inner ring right cylinder 5 and the top of outer shroud batter post 6, inner ring is straight
The high back absolute altitude for being attached thereto place with the space prestressed ring beam of the shape of a saddle with the top mark height of outer shroud batter post 6 of the top mark of post 5, inner ring beam,
Outer-ring beam, radial rib beam section are rectangular beam, and the span of inner ring beam is 20m, and section is high 1.5 meters, wide 2 meters；Outer-ring beam across
Spend for 22 meters, section is high 1.2 meters, wide 2 meters.The span of radial direction girt strip is 10 meters, and section is high 1.5 meters.
3. the space prestressed ring beam 4 of the shape of a saddle is made up of inner ring beam 1, outer-ring beam 2, radial direction girt strip 3, as shown in Figure 1.Inner ring
The tension of prestressed tendon end of beam 1 is arranged at the position of each 4 meters of reinforced concrete beam column node both sides, and stretching end passes through to reinforced concrete
Horizontal hunche is carried out in the range of native 4 meters of bean column node both sides and is formed, and haunching width is 0.5 meter, as shown in Figure 3.Inner ring beam 1
Factually border stressing conditions, employ five kinds of inner ring beam A, inner ring beam B, inner ring beam C, inner ring beam D, inner ring beam E form of reinforcement, five kinds
The distribution map of form of reinforcement beam is as shown in Figure 5.Five kinds of arrangement of reinforcement layout drawings are as shown in Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10.It is first according to
Pouring for general sequence of construction completion outer-ring beam and radial direction girt strip, then constructs to inner ring beam.
4. the sequence of construction of inner ring beam 1 is：After the skeleton forming of regular reinforcement 12, to the position of straight-line prestressed muscle 10
Position, welding positioning bar with the curvilinear coordinate of curved prestressing tendon 11 are marked, and the auditory localization cues of curved prestressing tendon 11 are such as
Shown in Figure 11.Next bellows and prestress wire are penetrated, then by bellows and prestress wire position admittedly
It is fixed, then in the installation of tensioning end position, fixed stretching end anchor slab, propped up tensioning Side Template, place stretch-draw jack, to
The concealed works such as straight-line prestressed muscle 10, curved prestressing tendon 11 and the regular reinforcement 12 fixed are installed and carry out passed examination
Afterwards, casting concrete and curing concrete, after checking that concrete quality is qualified, the side form of inner ring beam 1 is removed, to inner ring beam 1
Carry out hierarchical segmented tensioning.The installation procedure of inner ring beam 1 is as shown in figure 12.
5. hierarchical segmented stretching process is, divide five stages by the 20% of control stress for prestressing, 40%, 60%, 80%, 100%,
As shown in figure 13；Tensioning direction for counterclockwise, by due east across, due south across, due west across and due north across four across, every time
Simultaneous tension four is across 40 bridges are divided into 10 batches, and pressurization carries out tensioning step by step successively, and it is whole pre- to be always divided into 50 stages completions
The loading of stress.Inner ring beam is respectively staggeredly overlapped tensioning across presstressed reinforcing steel between two neighboring stretching end, as shown in Figure 4.
Hinged-support 7 and top cable-membrane analysis 8 are slided in installation after 6. inner ring girder tensioning terminates so that prestressed ring beam is in work
Make state.
Claims (8)
1. a kind of space prestressed ring beam of the shape of a saddle, is made up of inner ring beam, outer-ring beam and radial girders, it is characterised in that：Inner ring beam
It is connected by radial girders with outer-ring beam, the inner ring beam is that multispan uiform section continuously becomes absolute altitude prestressed concrete beam, described outer
Ring beam is that multispan uiform section continuously becomes absolute altitude reinforced beam, the footpath rib to beam be single span uiform section horizontal reinforcement concrete
Beam, ring sets curved prestressing tendon, straight-line prestressed muscle and regular reinforcement simultaneously in the inner ring beam, and the inner ring beam in advance should
The arrangement of power muscle and regular reinforcement is：After the completion of regular reinforcement arrangement, in the range of the framework of steel reinforcement that regular reinforcement is formed,
First straight-line prestressed muscle is evenly arranged along beam section periphery, then by curved prestressing tendon be arranged in the straight-line prestressed muscle of top layer it
Between, the inner ring beam and outer-ring beam are connected with bottom concrete structure by cast-in-situ steel reinforced concrete bean column node, top rope film
Structure is connected with space shape of a saddle ring beam by sliding hinged-support, the slip hinged-support radial level restraint release, ring water
Flat constraint retains.
A kind of 2. space prestressed ring beam of shape of a saddle according to claim 1, it is characterised in that：The inner ring beam, which uses, to be divided
Level subsection tension, anchoring, described each section of presstressed reinforcing steel of inner ring beam is staggeredly overlapped tensioning between two neighboring stretching end, described
Inner ring beam tension of prestressed tendon end is arranged at 1/5th positions of reinforced concrete beam column node both sides inner ring beam span, described
Stretching end is by carrying out Horizontal hunche and shape in the range of 1/5th to reinforced concrete beam column node both sides inner ring beam span
Into.
A kind of 3. space prestressed ring beam of shape of a saddle according to claim 1-2, it is characterised in that：It is the inner ring beam, outer
Ring beam and the strength grade of concrete of radial girders are C40.
A kind of 4. space prestressed ring beam of shape of a saddle according to claim 1-3, it is characterised in that：The prestressed ring beam
Using post stretching bonded prestress technology, presstressed reinforcing steel selects low relaxed prestress steel strand, and ultimate strength standard value is
1860MPa。
A kind of 5. space prestressed ring beam of shape of a saddle according to claim 1-4, it is characterised in that：Tension of prestressed tendon control
Stress processed is 1302Mpa, ultra stretching 3 percent during construction.
A kind of 6. space prestressed ring beam of shape of a saddle according to claim 1-5, it is characterised in that：It is first according to typically apply
Pouring for work sequentially completion outer-ring beam and radial direction girt strip, then constructs to inner ring beam.
A kind of 7. space prestressed ring beam of shape of a saddle according to claim 1-6, it is characterised in that：The construction of inner ring beam 1
Sequentially it is：After the skeleton forming of regular reinforcement 12, position and the curve of curved prestressing tendon 11 to straight-line prestressed muscle 10 are sat
Target position, welding positioning bar are marked, and next penetrate bellows and prestress wire, are then answered by bellows and in advance
Power steel strand wires are fixed on the positioning, then in the installation of tensioning end position, fixed stretching end anchor slab, propped up tensioning Side Template, laid
Good stretch-draw jack, it is hidden to having installed the straight-line prestressed muscle 10 fixed, curved prestressing tendon 11 and regular reinforcement 12 etc.
After covering engineering progress passed examination, casting concrete and curing concrete, after checking that concrete quality is qualified, by inner ring beam 1
Side form is removed, and hierarchical segmented tensioning is carried out to inner ring beam 1.
A kind of 8. space prestressed ring beam of shape of a saddle according to claim 7, it is characterised in that：Hierarchical segmented stretching process
To divide five stages by the 20% of control stress for prestressing, 40%, 60%, 80%, 100%；Tensioning direction is counter clockwise direction,
By due east across, due south across, due west across and due north across four across, each simultaneous tension four across, 40 bridges are divided into 10 batches,
Pressurization carries out tensioning step by step successively, is always divided into 50 whole prestressed loadings of stages completion；Inner ring beam respectively exists across presstressed reinforcing steel
Tensioning is staggeredly overlapped between two neighboring stretching end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254714.9A CN107419849B (en) | 2017-04-18 | 2017-04-18 | A kind of space prestressed ring beam of the shape of a saddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254714.9A CN107419849B (en) | 2017-04-18 | 2017-04-18 | A kind of space prestressed ring beam of the shape of a saddle |
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| Publication Number | Publication Date |
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| CN107419849A true CN107419849A (en) | 2017-12-01 |
| CN107419849B CN107419849B (en) | 2019-06-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113181A (en) * | 2018-08-27 | 2019-01-01 | 上海交通大学 | It is a kind of to step up the rectangular inner ring shape of a saddle bilayer cable-strut tensile structure of layer connection greatly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE834437A (en) * | 1974-10-14 | 1976-02-02 | CAPACITIES TO RECEIVE WATER, AND ESPECIALLY SWIMMING POOLS | |
| CN1978803A (en) * | 2005-12-06 | 2007-06-13 | 杨中源 | Super-length saddle prestressed ring beam seamless construction method |
| CN104975670A (en) * | 2015-06-25 | 2015-10-14 | 天津大学建筑设计研究院 | Combined-type cable dome structure for elliptic plane with unequal-height boundary |
-
2017
- 2017-04-18 CN CN201710254714.9A patent/CN107419849B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE834437A (en) * | 1974-10-14 | 1976-02-02 | CAPACITIES TO RECEIVE WATER, AND ESPECIALLY SWIMMING POOLS | |
| CN1978803A (en) * | 2005-12-06 | 2007-06-13 | 杨中源 | Super-length saddle prestressed ring beam seamless construction method |
| CN104975670A (en) * | 2015-06-25 | 2015-10-14 | 天津大学建筑设计研究院 | Combined-type cable dome structure for elliptic plane with unequal-height boundary |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113181A (en) * | 2018-08-27 | 2019-01-01 | 上海交通大学 | It is a kind of to step up the rectangular inner ring shape of a saddle bilayer cable-strut tensile structure of layer connection greatly |
| CN109113181B (en) * | 2018-08-27 | 2021-01-01 | 上海交通大学 | Large-span upper-layer-connected square inner ring saddle-shaped double-layer cable rod tensioning structure |
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| Publication number | Publication date |
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| CN107419849B (en) | 2019-06-14 |
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