CN106088768A - A kind of anti-buckling support, method and application with ring orientation prestress - Google Patents
A kind of anti-buckling support, method and application with ring orientation prestress Download PDFInfo
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- CN106088768A CN106088768A CN201610600878.8A CN201610600878A CN106088768A CN 106088768 A CN106088768 A CN 106088768A CN 201610600878 A CN201610600878 A CN 201610600878A CN 106088768 A CN106088768 A CN 106088768A
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- core
- inner sleeve
- support
- steel pipe
- ring orientation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of anti-buckling support, method and application with ring orientation prestress, this anti-buckling support includes supporting core, uses steel pipe as core；Core is provided the inner sleeve of hoop pre-tensile stress, is arranged on inside support core；For improving support core local stability bearing capacity and the trocar sheath of monolithic stability bearing capacity, it is arranged on outside support core, supports and be respectively provided with antifriction layer, in order to reduce the internal and external casing restriction to core axial deformation between core and internal and external casing.Supporting deadweight in the present invention little, although feature cross-section is compound steel pipe, but the cross section after combination remains as hollow section.Relative to solid section, construction weight is greatly lowered；Hysteresis Behavior is good.Supporting core, trocar sheath and the uniform steel of inner sleeve, intensity is high, and good endurance, Hysteresis Behavior is good；Core is applied ring orientation prestress, causes core to reduce in axial carrying capacity, so that core reaches the feature being easier to faster enter surrender, improve energy dissipation ability.
Description
Technical field
The present invention relates to architectural engineering correlative technology field, be specifically related to a kind of anti-buckling with ring orientation prestress
Support, method and application.
Background technology
Frame-braced system is common structure system in multi-rise building.Frame structure can be improved by arranging support
Lateral rigidity and side bearing capacity.The building structure providing fortification against earthquakes needs, bracing members can be by surrender dissipation seismic energy.But
If the ensuring that bracing members is surrendered under geological process, then need to limit its sectional dimension.
Under geological process under reciprocating load, the too small bracing members pressurized in cross section will occur flexing, and Hysteresis Behavior is relatively
Difference.Therefore, widely used anti-buckling support in current structure, its ultimate principle is on the one hand by limiting the cross section supporting core
Area, it is ensured that bracing members is surrendered under geological process；On the other hand, use outside core, increase sleeve pipe, prevent bracing members from existing
Flexing during pressurized, thus obtain good Hysteresis Behavior.
Common anti-buckling support includes the packing material between core and outer sleeve, and core and outer sleeve.Core
Part is the main force-summing element in component, and outer sleeve portions provides constraint to core, occurs during to prevent core partial compression
Complete buckling.For Zong He, of the prior art it is designed with following defect:
1, steel waste.Owing to traditional main force-summing element of anti-buckling support is core part, area of section is concentrated, long thin
Bigger, it is susceptible to flexing.For preventing core flexing from need to increase the outer sleeve that sectional dimension is bigger；Outer sleeve mainly prevents core
Material generation complete buckling, is not involved in bearing axle power, underuses steel, cause steel to be wasted；And need at core and set
Needing fill concrete class material between pipe, material usage is big.
2, from great.Coagulation great soil group packing material between core and outer sleeve is from great, and intensity is low.
3, the confined concrete between core and outer sleeve, under earthquake reciprocating load, is easily crushed and loses
Constraint and anti-buckling effect, cause the energy dissipation capacity of anti-buckling support to be greatly reduced.
4, as the bearing capacity of anti-buckling support need to be reduced, need fluting or perforate on core to weaken core with this, execute
Work process cumbersome, quality control difficulty is big, reduces and supports reliability.
It is therefore proposed that a kind of novel anti-buckling support, and can economical rationality, the anti-buckling support bearing of safe and reliable reduction
The manufacture method of power, is needed badly the solutions of those skilled in the art.
Summary of the invention
For the problems referred to above, in order to solve the deficiencies in the prior art, the present invention provides a kind of and has the anti-of ring orientation prestress
Buckling support, by the method introducing hoop pre-tensile stress, effectively reduces the axial compression surrender bearing capacity of anti-buckling support, carries
The high energy dissipation ability supported；
Present invention also offers concrete manufacture method supported above.It is specially inner sleeve falling temperature method and core steel pipe heats up
Method.Inner sleeve falling temperature method is specially inner sleeve cooling down and shrinks, and is then charged into supporting the manufacture method in core steel pipe, interior
When bushing temperature is increased to room temperature, produces dilatancy, thus core steel pipe is applied hoop pre-tensile stress；Core temperature-raising method,
Being specially heats up core steel pipe expands, and is then enclosed within the manufacture method outside inner sleeve, and core temperature of steel pipe is reduced to room temperature
Time, produce contraction distortion, this contraction distortion receive inner sleeve limit, core steel pipe thus produce hoop pre-tensile stress.In employing
The manufacture method stated, the hoop tension of core can be reduced core axial tension power by inner sleeve, reaches to allow core surrender in advance
The feature of power consumption.
Present invention also offers the application of above anti-buckling support.
The first string that the present invention provides: a kind of anti-buckling support with ring orientation prestress, including:
Support core, use steel pipe as core, be main stressed member；
It is arranged on the inner sleeve supported within core, with to supporting core offer hoop pre-tensile stress and improving support core
Monolithic stability and local stability bearing capacity；
It is arranged on the trocar sheath supported outside core, supports core local stability bearing capacity and monolithic stability carrying to improve
Power；
Support and between core and inside and outside sleeve pipe, antifriction layer is each set, during to reduce support core tension and compression deformation, inside and outside
The sleeve pipe restriction to supporting core axial deformation；The setting of antifriction layer can ensure that support core can be between inner sleeve and trocar sheath
Slide, for reducing the restriction of inner sleeve and the trocar sheath axial deformation to supporting core.
The setting of the most anti-buckling support, uses the steel pipe of big radius-thickness ratio as supporting core, is effectively increased support
Rigidity, reduces the support core requirement to anti-buckling measure.By the setting of inner sleeve, provide hoop prestretching to supporting core
Stress, weakens the axial compression bearing capacity of core core, enters yielding stage ahead of time and enter before making anti-buckling support relatively
Row power consumption, promotes the energy dissipation capacity of anti-buckling support.Inner sleeve external diameter is slightly larger than the internal diameter of core steel pipe, and inner sleeve can carry just
Effect for pre-tensile stress；Trocar sheath internal diameter can be equal to or slightly less than the external diameter of core steel pipe, coordinates the constraint of trocar sheath, improves
The stability bearing capacity supported, effectively saves the materials of steel in traditional method.
Further, in order to improve the rigidity of support, described support core is round steel pipe.
Further, described antifriction layer is the tubing being made up of high molecular weight ptfe material or graphite-like lubricant,
This antifriction layer is to be placed on the outer layer of inner sleeve or be applied in inner sleeve outer layer equally, or is placed on outer layer or the painting supporting core
Smear in the outer layer supporting core.
Further, considering the effect and the cost of material supported, the material of described inner sleeve is building knot
Structure mild steel.
Further, the material of described trocar sheath is building structure mild steel.
Further, described inner sleeve supports in core or core steel pipe is by intensification rear enclosure by loading after cooling
In the outside of inner sleeve, by such setting so that inner sleeve fits tightly with supporting core, with to supporting core offer one
Fixed hoop pre-tensile stress.Support core under multiaxial stress effect, the reduction of axial compression resistance yield strength, effectively reduce
The surrender bearing capacity of support.
The present invention provides the first manufacture method of a kind of anti-buckling support with ring orientation prestress, and concrete steps are such as
Under:
1) inner sleeve will be lowered the temperature before assembly, until the external diameter cooling of inner sleeve is retracted to less than supporting the interior of core
Footpath, now inserts inner sleeve in support core；
2) inner sleeve temperature is increased to room temperature naturally, and in temperature-rise period, inner sleeve expands, and provides hoop pre-to supporting core
Tension.
The present invention provides the second manufacture method of a kind of anti-buckling support with ring orientation prestress, and concrete steps are such as
Under:
1) before assembly, core steel pipe is heated up, until the internal diameter of core steel pipe expand into the external diameter more than inner sleeve,
Now by core steel pipe socket in the outside of inner sleeve；
2) temperature of the steel pipe of core naturally cools to room temperature, and in cooling procedure, the cooling of core steel pipe is shunk, and this contraction becomes
Shape is limited by inner sleeve, and core steel pipe produces hoop tension.
Additionally, above-mentioned a kind of anti-buckling support with ring orientation prestress, answering in high intensity Zone frame structure
With.
The invention has the beneficial effects as follows:
1) steel are saved.The critical piece steel pipe of stress uses hollow cross section of remaining silent, and is compared to common yi word pattern real
Heart cross section, the cross-sectional expansion in hollow cross section of remaining silent, the radius of gyration is big, itself i.e. has a bigger anti-flexion capabilities, reasonable stress,
Outer confinement sleeve and the material usage of interior confinement sleeve can be reduced.
2) conduct oneself with dignity little.Although cross section of the present invention is compound steel pipe, but the cross section after combination remains as hollow section.Relatively
In solid section, construction weight is greatly lowered.
3) durability and Hysteresis Behavior are good.Supporting core, trocar sheath and the uniform steel of inner sleeve, intensity is high, good endurance,
Hysteresis Behavior is good.
4) core being applied ring orientation prestress, cause core to decline in axial carrying capacity, more holding so that supporting core
Easily further into the feature of surrender, improve energy dissipation ability.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of this device；
In figure: 1, support core, 2, trocar sheath, 3, inner sleeve, 4, antifriction layer.
Detailed description of the invention
Below in conjunction with Figure of description, by specific embodiment, the invention will be further described:
As it is shown in figure 1, a kind of anti-buckling support with ring orientation prestress, including: cross section is the anti-buckling support of steel pipe
Core 1, supporting core 1 is supporting steel pipe；Anti-buckling support core is provided the inner sleeve 3 of hoop pre-tensile stress, outside inner sleeve 3
Footpath is slightly larger than the internal diameter of core steel pipe, and concrete numerical value is determined by design；Improve and support core local stability bearing capacity and entirety
The trocar sheath 2 of stability bearing capacity, trocar sheath 2 internal diameter can be equal to or slightly greater than the external diameter of core steel pipe.Inner sleeve 3 and support core
Between 1, support between core 1 and trocar sheath 2, be provided with antifriction layer, it is ensured that supporting core can be at inner sleeve 3 and trocar sheath 2
Between slide, for reduce inner sleeve and trocar sheath to support core 1 axial constraint.
A kind of there is the anti-buckling support of ring orientation prestress the first manufacture method be: inner sleeve 3 is lowered the temperature, directly before Pin Zhuan
External diameter to inner sleeve 3 is lowered the temperature and is retracted to be less than the internal diameter supporting core 1, inner sleeve 3 now penetrates support core 1, and allows
Inner sleeve 3 temperature is increased to room temperature naturally, and in temperature-rise period, inner sleeve 3 expands, and provides hoop pre-tensile stress to supporting core 1.
A kind of there is the anti-buckling support of ring orientation prestress the second manufacture method be: before assembled, core steel pipe is heated up,
Until the internal diameter of core steel pipe is slightly larger than the external diameter of inner sleeve, now core steel pipe is inserted in outside inner sleeve, and allows core steel
Pipe temperature is reduced to room temperature naturally, and in temperature-fall period, core steel pipe shrinks, and contraction distortion receives the constraint of inner sleeve, supports core
Hoop pre-tensile stress is produced in steel pipe.
Embodiment 1: support core steel pipe is typically smaller than 1MPa along the extrusion stress in thickness of steel pipe direction, the most negligible.
Only consider hoop tension and axial stress.Under two-dimensional state of stress, according to Mises yield criterion, the yield condition of steel
For
σ1It is represented by:
Wherein σ2For the ring orientation prestress being pre-applied on core, σ1For axial tension or compressive yield strength.Table 1
List Q235 steel under different hoop action of pulling stress, core tensile yield strength and the change of compressive yield strength.By
In the existence of hoop tension, the compressive yield strength of core significantly reduces, i.e. core can be under relatively low pressuring stress level
Surrender.
For Q235B steel, when hoop tension is 150Mpa, axial compression resistance yield strength is only 96.3Mpa, only
For it under the conditions of single load bearing the 40.9% of yield strength 235Mpa, therefore there is more preferable energy dissipation capacity.
Table 1 Q235 steel are axial yield strength under different hoop pre-tensile stress effects
Embodiment 2: anti-buckling support core steel tube section Φ 300x6, inner sleeve sectional dimension is Φ 288.5x6, overcoat
Tube section a size of Φ 312x6.The internal diameter of trocar sheath is identical with the external diameter of core steel pipe, can normally assemble.Outside inner sleeve
Footpath 288.5mm is more than the internal diameter 288mm of core steel pipe.Use liquid nitrogen by inner sleeve temperature from ambient 20 DEG C lower the temperature 125 DEG C to-
105 DEG C, steel pipe amount of contraction is 0.5mm.Now inner sleeve external diameter is identical with core internal diameter, can assemble.After having assembled, inner sleeve
Pipe temperature is gone up to 20 DEG C by-105 DEG C, heats up 125 DEG C.Expanding owing to heating up and limited by core steel, inner sleeve external diameter is
288.2mm, amount of compression is 0.3mm；The internal diameter of core steel pipe is 288.2mm, and propagation is 0.2mm, and corresponding hoop prestretching should
Power is 130Mpa.Now the compressive yield strength of core is 118.2MPa, and tensile strength is 248.2Mpa.Resisting of anti-buckling support
It is 668kN that lateral deflection takes strength failure criterion, compares and drops with the compressive yield strength 1355KN of the anti-buckling support of size without prestressing force
Much lower.In the case of being provided without low-yield steel, significantly reduce the surrender bearing capacity of steel.
Embodiment 3: anti-buckling support core steel tube section Φ 300x6, inner sleeve sectional dimension is Φ 288.5x6, overcoat
Tube section a size of Φ 312x6.The internal diameter of trocar sheath is identical with the external diameter of core steel pipe, can normally assemble.Outside inner sleeve
Footpath 288.5mm is more than the internal diameter 288mm of core steel pipe.Use electric furnace that core temperature of steel pipe is heated up 125 DEG C extremely by room temperature 20 DEG C
145 DEG C, core steel pipe swell increment is 0.5mm.Now inner sleeve external diameter is identical with core internal diameter, can assemble.After having assembled,
Core temperature of steel pipe is down to 20 DEG C by 145 DEG C, and temperature reduces by 125 DEG C.Owing to the cooling of core steel pipe is shunk by inner sleeve steel pipe
Restriction, inner sleeve external diameter is 288.2mm, and amount of compression is 0.3mm；The internal diameter of core steel pipe is 288.2mm, and propagation is
0.2mm, corresponding hoop pre-tensile stress is 130Mpa.Now the compressive yield strength of core is 118.2MPa, and tensile strength is
248.2Mpa.The compressive yield strength design load of anti-buckling support is 668kN, compares without prestressing force with the anti-buckling support of size
Compressive yield strength 1355KN reduce a lot.In the case of being provided without low-yield steel, significantly reduce bending of steel
Take bearing capacity.
The foregoing is only presently preferred embodiments of the present invention, be not whole embodiments of the present invention, not in order to limit
The present invention processed, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in
Within protection scope of the present invention.
In addition to technical characteristic described in description, remaining technical characteristic is all known to a person skilled in the art technology, in order to prominent
Going out the innovative characteristics of the present invention, above-mentioned technical characteristic does not repeats them here.
Claims (9)
1. an anti-buckling support with ring orientation prestress, it is characterised in that including:
Hollow support core,
It is arranged on and supports the inner sleeve within core and fit with supporting core, with to supporting core offer hoop pre-tensile stress also
Improve monolithic stability and the local stability bearing capacity supporting core；
It is arranged on the trocar sheath supported outside core, supports core local stability bearing capacity and monolithic stability bearing capacity to improve；
Support and between core and inside and outside sleeve pipe, antifriction layer is each set, during to reduce support core tension and compression deformation, inside and outside sleeve pipe
To the restriction supporting core axial deformation.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1, described support core is round steel pipe.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1 and 2, it is characterised in that described in subtract
The layer that rubs is the tubing being made up of high molecular weight ptfe material.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1 and 2, it is characterised in that in described
The material of sleeve pipe is common building structural mild steel.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1 and 2, it is characterised in that outside described
The material of sleeve pipe is common building structural mild steel.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1, it is characterised in that described inner sleeve
Support in core by loading after cooling, or support the outside being contained in inner sleeve after core is expanded by intensification.
7. according to the manufacture method of a kind of anti-buckling support with ring orientation prestress according to any one of claim 1～6,
It is characterized in that, specifically comprise the following steps that
1) inner sleeve will be lowered the temperature before assembly, until the external diameter cooling of inner sleeve is retracted to less than the internal diameter supporting core,
Now inner sleeve is inserted in support core；
2) inner sleeve temperature is increased to room temperature naturally, and in temperature-rise period, inner sleeve expands, and provides hoop prestretching to answer to supporting core
Power.
8. according to the manufacture method of a kind of anti-buckling support with ring orientation prestress according to any one of claim 1～6,
It is characterized in that, specifically comprise the following steps that
1) core steel pipe will be heated up before assembly, until the internal diameter of core steel pipe expand into the external diameter more than inner sleeve, this
Time by core steel pipe socket in the outside of inner sleeve；
2) core temperature of steel pipe is reduced to room temperature naturally, and in temperature-fall period, core steel pipe shrinks, and contraction distortion receives inner sleeve limit
System, supports core steel pipe and produces hoop pre-tensile stress.
A kind of anti-buckling support with ring orientation prestress the most according to claim 1, ties at high intensity Zone framework
The application of structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610600878.8A CN106088768B (en) | 2016-07-27 | 2016-07-27 | A kind of anti-buckling support, method and application with ring orientation prestress |
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|---|---|---|---|
| CN201610600878.8A CN106088768B (en) | 2016-07-27 | 2016-07-27 | A kind of anti-buckling support, method and application with ring orientation prestress |
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| CN106088768A true CN106088768A (en) | 2016-11-09 |
| CN106088768B CN106088768B (en) | 2018-10-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525795A (en) * | 2019-07-30 | 2019-12-03 | 中铁大桥局集团有限公司 | A kind of steel reinforcement cage storing unit and its application |
| CN114236640A (en) * | 2021-12-06 | 2022-03-25 | 中国电建集团贵州电力设计研究院有限公司 | Method for selecting steel for icing high-altitude meteorological ice observation test tower |
| CN115961964A (en) * | 2023-01-06 | 2023-04-14 | 腾达建设集团股份有限公司 | Organic glass sleeve mounting method for composite earth pressure shield construction mechanism experimental device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114236640A (en) * | 2021-12-06 | 2022-03-25 | 中国电建集团贵州电力设计研究院有限公司 | Method for selecting steel for icing high-altitude meteorological ice observation test tower |
| CN114236640B (en) * | 2021-12-06 | 2024-03-26 | 中国电建集团贵州电力设计研究院有限公司 | Method for selecting tower steel for repeated ice high-altitude meteorological ice observation test |
| CN115961964A (en) * | 2023-01-06 | 2023-04-14 | 腾达建设集团股份有限公司 | Organic glass sleeve mounting method for composite earth pressure shield construction mechanism experimental device |
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| CN106088768B (en) | 2018-10-30 |
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