CN206873633U - A kind of prestressed bolt foot joint attachment structure - Google Patents
A kind of prestressed bolt foot joint attachment structure Download PDFInfo
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- CN206873633U CN206873633U CN201720183173.0U CN201720183173U CN206873633U CN 206873633 U CN206873633 U CN 206873633U CN 201720183173 U CN201720183173 U CN 201720183173U CN 206873633 U CN206873633 U CN 206873633U
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- bolt
- crab
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- steel column
- bottom plate
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Abstract
The utility model belongs to the technical field of building structure, specially a kind of prestressed bolt foot joint attachment structure, including steel column, concrete foundation, crab-bolt support bracket top plate, stiffener, bottom plate, PVC sleeve pipes, crab-bolt, upper lower nut, lower anchor slab, the first cast-in fixing bolt in concrete foundation, separated between crab-bolt and concrete using PVC sleeve pipes, the lower anchor slab of crab-bolt is fixed with lower nut, pretension is applied to crab-bolt with hydraulic stretching device, bottom plate is fixed with the crab-bolt being embedded in concrete foundation again, to improve column root-plate rigidity and avoiding bottom plate blocked up, crab-bolt support bracket top plate is set up under crab-bolt, steel column bottom is welded to connect with bottom plate, stiffener is set to strengthen foolrstiffness in steel column bottom and concrete foundation junction, improve the bearing capacity of suspension column.This locking vibration-isolating effect of foot joint attachment structure is good, adds the intensity and toughness of crab-bolt, has saved material, simplifies construction.
Description
Technical field
The utility model belongs to the technical field of building structure, specially a kind of prestressed bolt foot joint connection knot
Structure.
Background technology
Common crab-bolt is widely used in the connection of steel kind design and concrete foundation, requirement of this connection to construction precision
It is comparatively tolerant, thus have the advantages of convenient construction, but common crab-bolt is connected with following significant drawback：
（1）Design strength is low, does not only result in the increase of crab-bolt steel using amount, also increases whole foot joint volume, especially
It is the increase of column root-plate area, and then causes moment of flexure to increase, design thickness of slab increase, rolled steel dosage is significantly increased；
（2）Stress is indefinite, because joint form and the difference of real node that agent structure is selected in calculating are made
Into, such as in the design of light steel door frame, due to the discontinuous reason of suspension column bending rigidity, generally suspension column is considered as it is be hinged, this
One assumes it is correct on the whole, and is partial to safety, but if the suspension column internal force being so calculated is used into crab-bolt
In design, it is indefinite to result in the stress of crab-bolt, and in fact, crab-bolt suspension column has certain bending rigidity, simply its bottom plate
The bending rigidity after contacting is partially broken away from concrete surface suddenly to reduce, it is impossible to suitable with the bending rigidity of steel column.
It is discontinuous due to common anchor hitching post pin bending rigidity, it is impossible to as rigid connection suspension column, so presently relevant specification is all
Principal mode using embedded column base or outer-enwraped type suspension column as rigid connection suspension column.Although embedded column base or outer-enwraped type suspension column is anti-
Curved rigidity and rigidity all reach rigid connection standard, but still have following major defect：
（1）In buried section or outsourcing section altitude range, material is reused, and the intensity of steel column can not replace the strong of post muscle
Degree, the intensity of post muscle can not replace the intensity of steel column, therefore this suspension column steel using amount is big and uneconomical；
（2）Outer-enwraped type suspension column make it that building effective usable floor area is reduced；
（3）The steel column buried section of embedded column base meets with foundation level coupling beam reinforcing bar or basement wall beam, reinforcing steel bars of wallboards
Pass through, cause difficulty of construction very big, progress is impacted, and high cost.
Because existing common anchor hitching post pin and two kinds of rigid connection suspension columns have disadvantages mentioned above, so should be under suitable condition
Design and construction method are improved, to reach not only safe and applicable but also economic structure design target.
The difference of prestressed bolt and common crab-bolt is will be to crab-bolt application pretension, and the sizableness of pretension is in height
The prestretching force value of strength bolts.Its force-mechanism is：The pretension of crab-bolt produces precompression to stub concrete, and stub is working
Stage by it is curved when, compressive region compression slightly increases and crab-bolt pretension relaxes, so compression increase is seldom, tensile region crab-bolt is pre-
Tension has increase tendency, but because coagulation soil compressive stress relaxes, tension increase is seldom, crab-bolt top plate caused by crab-bolt pretension
Shearing can be resisted to frictional force caused by the pressure of concrete column pier top, because pulling force design load is only prestressing force suffered by crab-bolt
The 80% of crab-bolt prestretching force value, so concrete remains pressured state in structure validity period, structural stress state is constant.
The design strength of prestressed bolt should be by the design strength value of high-strength bolt, also can be by prestressed concrete
Deformed bar intensity value, because this several stress is all suitable.Therefore prestressed bolt design strength is than same
The common crab-bolt intensity of material improves 1.53 times, has very big superiority to saving crab-bolt steel using amount and foot joint steel using amount.
Prestressed bolt should have the accuracy that construction measure ensures its stress in the design.Main structure measures be crab-bolt with
Separated between concrete using PVC sleeve pipes, make the cohesive force that can break away from concrete during crab-bolt tensioning in sleeve pipe altitude range
And freely extend, and this section concrete is drawn more deformation energy when also stretching crab-bolt by uniform pressure and is reached
Locking vibration-isolating effect.Gap between sleeve pipe and crab-bolt can make suspension column also have less adjustment leeway, and crab-bolt when being inserted in crab-bolt
Thus it is small negligible enough to bend caused secondary stress.
Also there is prestressed bolt in the project designed in conventional engineering practice or abroad, but due to not setting specially
Standby, crab-bolt is relatively thick so applying pretension to crab-bolt with calibrated wrench method is extremely difficult to standard in addition.In many cases, with big torque wrench
Pull motionless, calculation reaches standard, but crab-bolt is broken because by huge tension-torsion combined stress sometimes.It is difficult to mend after crab-bolt fracture
Rescue, be extremely restricted in this way.Direct stretching method i.e. hydraulic stretching device is can use to crab-bolt in order to solve this problem
Apply pretension.Direct stretching method can accurately apply pretension, and not produce moment of torsion, screw rod is in the simple stress of pure tension
State, to improve the intensity of structure and toughness.
The advantages of prestressed bolt：
（1）Suitable for the big node of crab-bolt stress, especially with the node of high-strength bolt；
（2）Crab-bolt stress can be specified so that crab-bolt is in Simple stress condition, pressure caused by crab-bolt pretension and rubs
Wipe power can shearing resistance, crab-bolt tension but node reaches rigid connection.The intensity of crab-bolt is improved, saves the use of crab-bolt and node other parts
Steel amount；
（3）High-strength bolt can be used for anchor bolts, and due to being constructed using direct stretching method, its intensity is than present high-strength bolt
Intensity is also high 1.2 times, more more than the increase of existing crab-bolt intensity.When being constructed using direct stretching method, prestressed bolt intensity is than passing
System crab-bolt intensity improves 1.53 times；
Change and generally believe the only basic viewpoint for just calculating rigid connection of steel column Transducers Embedded in Concrete at present, avoid steel column and concrete
Middle reinforcing bar complex cross, material is saved, simplify construction.
The content of the invention
The purpose of this utility model is there is disadvantages mentioned above for existing common anchor hitching post pin and two kinds of rigid connection suspension columns, institute
That should improve under suitable condition design and construction method, to reach not only safe and applicable but also economic structure design mesh
Mark, therefore provide a kind of prestressed bolt foot joint attachment structure, the utility model application PVC sleeve pipes are by crab-bolt and concrete
Separation, makes to break away from the cohesive force of concrete during crab-bolt tensioning in sleeve pipe altitude range and freely extend, and mix this section
Solidifying soil is drawn more deformation energy and reaches locking, vibration-isolating effect by uniform pressure when also stretching crab-bolt；Using hydraulic pressure
The method that tensioner applies pretension to crab-bolt avoids the antitorque composite stress state of crab-bolt, adds the intensity of crab-bolt and tough
Property, pretension can be accurately controlled, while crab-bolt stress can be specified using prestressed bolt so that crab-bolt is in simple stress shape
State, pressure caused by crab-bolt pretension and frictional force can shearing resistance, crab-bolt tension but node reaches rigid connection improves the strong of crab-bolt
Degree, save the steel using amount of crab-bolt and node other parts；High-strength bolt can be used for anchor bolts, due to being applied using direct stretching method
Work, its intensity is also higher 1.2 times than present high-strength bolt intensity, more more than the increase of present crab-bolt intensity, prestressed bolt intensity ratio
Traditional crab-bolt intensity improves 1.53 times；This foot joint connection method changes generally believes that only steel column embedment is mixed at present
Solidifying earth foundation just calculates the viewpoint of rigid connection, avoids steel column and reinforcement in concrete complex cross, saves material, simplifies construction.
The technical solution of the utility model is.
A kind of prestressed bolt foot joint attachment structure, including steel column, concrete foundation, crab-bolt support bracket top plate,
Stiffener, bottom plate, PVC sleeve pipes, crab-bolt, upper lower nut, lower anchor slab, first cast-in fixing bolt, crab-bolt and coagulation in concrete foundation
Separated between soil using PVC sleeve pipes, the lower anchor slab of crab-bolt is fixed with lower nut, applies prestretching to crab-bolt with hydraulic stretching device
Power, then fixed bottom plate with the crab-bolt being embedded in concrete foundation, to improve column root-plate rigidity and avoiding bottom plate blocked up, anchor
Crab-bolt support bracket top plate is set up under bolt, steel column bottom is welded to connect with bottom plate, in steel column bottom and concrete foundation junction
Stiffener is set to improve the bearing capacity of suspension column to strengthen foolrstiffness.
The characteristics of the utility model, also has.
Described steel column is square steel column.
Described bottom plate is square floor, and base plate thickness is set to 30mm.
Described crab-bolt is high-strength bolt, is separated between crab-bolt and concrete using PVC sleeve pipes, and the lower anchor slab of crab-bolt is used
Lower nut is fixed, and applies pretension to crab-bolt with hydraulic stretching device, then consolidated bottom plate with the crab-bolt being embedded in concrete foundation
It is fixed, to improve column root-plate rigidity and avoiding bottom plate blocked up, crab-bolt support bracket top plate is set up under crab-bolt.
Described steel column bottom is welded to connect with bottom plate, set in steel column bottom and concrete foundation junction stiffener with
Strengthen foolrstiffness, improve the bearing capacity of suspension column.
Described PVC sleeve pipes separate crab-bolt with concrete, make to break away from sleeve pipe altitude range during crab-bolt tensioning
The cohesive force of concrete and freely extend, and this section concrete is drawn by uniform pressure when also stretching crab-bolt more
Deformation energy and reach locking, vibration-isolating effect.
The method that described hydraulic stretching device applies pretension to crab-bolt avoids the antitorque composite stress state of crab-bolt, increases
The intensity and toughness of crab-bolt, can accurately control pretension.
Construction method of the present utility model is as follows：
（1）The first cast-in fixing bolt in concrete foundation, separated between crab-bolt and concrete using PVC sleeve pipes, under crab-bolt
Anchor slab is fixed with lower nut；（2）Pretension is applied to crab-bolt with hydraulic stretching device；（3）With being embedded in concrete foundation
Crab-bolt fixes bottom plate, and to improve column root-plate rigidity and avoiding bottom plate blocked up, crab-bolt support bracket top plate is set up under crab-bolt；
（4）Lift Lift-on/Lift-off System lifting steel column；（5）Steel column bottom is welded to connect with bottom plate；（6）Connect in steel column bottom and concrete foundation
The place of connecing sets stiffener to improve the bearing capacity of suspension column to strengthen foolrstiffness.
The beneficial effects of the utility model：With existing common anchor hitching post pin and two kinds of embedded column base or outer-enwraped type suspension column
Rigid connection foot joint interconnection technique is compared, and the utility model, which provides, provides a kind of prestressed bolt foot joint attachment structure,
The utility model application PVC sleeve pipes separate crab-bolt with concrete, make to break away from sleeve pipe altitude range during crab-bolt tensioning
The cohesive force of concrete and freely extend, and this section concrete is drawn by uniform pressure when also stretching crab-bolt more
Deformation energy and reach locking, vibration-isolating effect；Crab-bolt is avoided using hydraulic stretching device to the method for crab-bolt application pretension to resist
Composite stress state is turned round, adds the intensity and toughness of crab-bolt, can accurately control pretension, while can using prestressed bolt
Specify crab-bolt stress so that crab-bolt is in Simple stress condition, pressure caused by crab-bolt pretension and frictional force can shearing resistance, anchor
Bolt tension but node reaches rigid connection, the intensity of crab-bolt is improved, save the steel using amount of crab-bolt and node other parts；High-strength bolt
Available for anchor bolts, due to being constructed using direct stretching method, its intensity is also higher 1.2 times than present high-strength bolt intensity, than existing
More in the increase of crab-bolt intensity, prestressed bolt intensity improves 1.53 times than traditional crab-bolt intensity；This foot joint connection
Method changes generally believes the only basic viewpoint for just calculating rigid connection of steel column Transducers Embedded in Concrete at present, avoids in steel column and concrete
Reinforcing bar complex cross, material is saved, simplify construction.
Brief description of the drawings
Fig. 1 prestressed bolt foot joint profiles.
Fig. 2 prestressed bolt foot joint top views.
1-steel column；2-crab-bolt support bracket top plate；3-stiffener；4-bottom plate；5-PVC sleeve pipes；6-crab-bolt；7—
Upper lower nut；8-lower anchor slab；9-concrete foundation.
Embodiment
For can understand illustrate this programme technical characterstic, the utility model embodiment is made below according to accompanying drawing into
One step explanation.
Embodiment 1.
From figure 1 it appears that a kind of prestressed bolt foot joint attachment structure, including steel column 1, concrete foundation 9,
Crab-bolt support bracket top plate 2, stiffener 3, bottom plate 4, PVC sleeve pipes 5, crab-bolt 6, upper lower nut 7, lower anchor slab 8, first in coagulation soil matrix
Cast-in fixing bolt 6 in plinth 9, separated between crab-bolt 6 and concrete using PVC sleeve pipes 5, the lower anchor slab 8 of crab-bolt 6 is solid with lower nut 7
It is fixed, pretension is applied to crab-bolt 6 with hydraulic stretching device, then fixed bottom plate 4 with the crab-bolt 6 being embedded in concrete foundation 9, it is
Improve column root-plate rigidity and avoid bottom plate 4 blocked up, crab-bolt support bracket top plate 2, the bottom of steel column 1 and bottom plate 4 are set up under crab-bolt 6
It is welded to connect, sets stiffener 3 to improve suspension column to strengthen the rigidity of bottom plate 4 in the bottom of steel column 1 and the junction of concrete foundation 9
Bearing capacity.
Described steel column is square steel column.
Described bottom plate is square floor, and base plate thickness is set into 30mm according to code requirement.
Described crab-bolt is high-strength bolt, is separated between crab-bolt and concrete using PVC sleeve pipes, and the lower anchor slab of crab-bolt is used
Lower nut is fixed, and applies pretension to crab-bolt with hydraulic stretching device, then consolidated bottom plate with the crab-bolt being embedded in concrete foundation
It is fixed, to improve column root-plate rigidity and avoiding bottom plate blocked up, crab-bolt support bracket top plate is set up under crab-bolt.
Described steel column bottom is welded to connect with bottom plate, set in steel column bottom and concrete foundation junction stiffener with
Strengthen foolrstiffness, improve the bearing capacity of suspension column.
Described PVC sleeve pipes separate crab-bolt with concrete, make to break away from sleeve pipe altitude range during crab-bolt tensioning
The cohesive force of concrete and freely extend, and this section concrete is drawn by uniform pressure when also stretching crab-bolt more
Deformation energy and reach locking, vibration-isolating effect.
The method that described hydraulic stretching device applies pretension to crab-bolt avoids the antitorque composite stress state of crab-bolt, increases
The intensity and toughness of crab-bolt, can accurately control pretension.
Embodiment 2.
Construction method of the present utility model is as follows：
The first cast-in fixing bolt 6 in concrete foundation 9, is separated between crab-bolt 6 and concrete using PVC sleeve pipes 5, crab-bolt 6
Lower anchor slab 8 is fixed with lower nut 7；（2）Pretension is applied to crab-bolt 6 with hydraulic stretching device；（3）With being embedded in concrete foundation
Crab-bolt 6 in 9 fixes bottom plate 4, and to improve column root-plate rigidity and avoiding bottom plate 4 blocked up, crab-bolt branch support is set up under crab-bolt 6
Seat top plate 2；（4）Lift Lift-on/Lift-off System lifting steel column 1；（5）The bottom of steel column 1 is welded to connect with bottom plate 4；（6）The bottom of steel column 1 with
The junction of concrete foundation 9 sets stiffener 3 to improve the bearing capacity of suspension column to strengthen the rigidity of bottom plate 4.
Claims (4)
1. a kind of prestressed bolt foot joint attachment structure, including steel column, concrete foundation, crab-bolt support bracket top plate plus
Strength plate, bottom plate, PVC sleeve pipes, crab-bolt, upper lower nut, lower anchor slab, it is anchor bolt preburied in concrete foundation, crab-bolt and concrete it
Between separated using PVC sleeve pipes, the lower anchor slab of crab-bolt fixed with lower nut, applies pretension to crab-bolt with hydraulic stretching device, then
Bottom plate is fixed with the crab-bolt being embedded in concrete foundation, crab-bolt support bracket top plate, steel column bottom and bottom are set up under crab-bolt
Plate weld is connected, and stiffener is set in steel column bottom and concrete foundation junction.
A kind of 2. prestressed bolt foot joint attachment structure according to claim 1, it is characterised in that described steel column
For square steel column.
A kind of 3. prestressed bolt foot joint attachment structure according to claim 1, it is characterised in that described bottom plate
For square floor, base plate thickness is set to 30mm.
A kind of 4. prestressed bolt foot joint attachment structure according to claim 1, it is characterised in that described PVC
Sleeve pipe separates crab-bolt with concrete, the cohesive force for making that concrete can be broken away from during crab-bolt tensioning in sleeve pipe altitude range and from
By extending, and this section concrete is set to be drawn more deformation energy when also stretching crab-bolt by uniform pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183173.0U CN206873633U (en) | 2017-02-28 | 2017-02-28 | A kind of prestressed bolt foot joint attachment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183173.0U CN206873633U (en) | 2017-02-28 | 2017-02-28 | A kind of prestressed bolt foot joint attachment structure |
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| Publication Number | Publication Date |
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| CN206873633U true CN206873633U (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720183173.0U Expired - Fee Related CN206873633U (en) | 2017-02-28 | 2017-02-28 | A kind of prestressed bolt foot joint attachment structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641479A (en) * | 2023-06-06 | 2023-08-25 | 中国十七冶集团有限公司 | Novel steel structure column base construction method |
-
2017
- 2017-02-28 CN CN201720183173.0U patent/CN206873633U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641479A (en) * | 2023-06-06 | 2023-08-25 | 中国十七冶集团有限公司 | Novel steel structure column base construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 Termination date: 20190228 |