CN102261140B - Segmental energy-consumption buckling-restrained brace method and device - Google Patents
Segmental energy-consumption buckling-restrained brace method and device Download PDFInfo
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- CN102261140B CN102261140B CN 201110133231 CN201110133231A CN102261140B CN 102261140 B CN102261140 B CN 102261140B CN 201110133231 CN201110133231 CN 201110133231 CN 201110133231 A CN201110133231 A CN 201110133231A CN 102261140 B CN102261140 B CN 102261140B
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 93
- 239000010959 steel Substances 0.000 claims abstract description 93
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 11
- 230000011218 segmentation Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
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Abstract
The invention discloses a segmental energy-consumption buckling-restrained brace method and a segmental energy-consumption buckling-restrained brace device. Core steel is designed into the core steel with a variable cross section to divide the overall core steel into three sections based on that stresses and the actions of each part of the core steel are different in earthquake resistance, wherein the middle section of the core steel is a small cross section energy consumption section; the two sides of the small cross section energy consumption section are respectively provided with a large cross section energy consumption section symmetrically; the area of the cross sections of the large cross section energy consumption sections is greater than that of the cross section of the small cross section energy consumption section; and the earthquake resistance is performed by different states of the small cross section energy consumption section and the large cross section energy consumption section in earthquake conditions at all levels. The segmental energy-consumption buckling-restrained brace can realize multilevel earthquake fortification of an earthquake resistance and earthquake adsorption engineering structure; when a conventional earthquake (middle earthquake) happens, the energy consumption section L1 of the buckling-restrained brace core steel consumes energy; and when a rare occurrence earthquake (major earthquake) happens, the energy consumption sections L1 and L2 of the buckling-restrained brace core steel participate in energy consumption.
Description
Technical field
The present invention relates to a kind of earthquake resistant structure parts of structural engineering, refer in particular to a kind of buckling-restrained energy-dissipation method and device that has lateral resisting and power consumption dual-use function concurrently, belong to technical field of structural engineering.
Background technology
China is vast in territory, but many large-and-medium size cities all are in seismic region.The building that is built in the earthquake zone all will be considered the anti-seismic performance of structure.Buckling-restrained energy-dissipation is expected to be used widely in various earthquake proof constructions as a kind of novel shock resisting member.
The buckling-restrained energy-dissipation great advantage is that it has lateral resisting and power consumption dual-use function concurrently, with center support in the existing steel frame or accentric support flexing occurs under external force and can not effectively consume energy and compare, and has huge advantage.
Under the effect of the conventional load such as wind carries, buckling-restrained energy-dissipation can play lateral resistant member; Under the seismic (seismal effect, buckling-restrained energy-dissipation core steel constraint under repeatedly surrender (plastic strain) and flexing (unstability) not consumes inputting seismic energy.Because the effect of contraction of protector, anti-buckling support shows essentially identical Hysteresis Behavior under the effect of Tensile or Compressive Loading, and hysteresis loop is very full, is desirable dissipative member.
But the anti-buckling support that generally adopts on the engineering at present can only be set up defences by the earthquake magnitude single-stage, and all be the same grade earthquake resistant structure design of adopting for an anti-buckling support, what adopt is prismatic core structural steel design, consider to tend to improve the earthquake magnitude of setting up defences for secure context like this, will inevitably strengthen engineering structures like this and improve cost.Therefore necessary this is improved.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the deficiency of existing anti-buckling support design, the present invention is different according to the power that anti-buckling support different parts bears, act on also different principles, proposed a kind of anti-buckling support method and the device that can rationally take fortification measure.
In order to realize purpose of the present invention, technical scheme proposed by the invention is: a kind of Segmental energy-consumption buckling-restrained brace method, power and the role suffered according to core steel each position when shockproof are different, the core steel is designed to the core steel of a variable cross-section, whole core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the cross section of heavy in section power consumption section is greater than the section area of small bore power consumption section; Carry out antidetonation by small bore power consumption section from a heavy in section power consumption section state different in seismologies at different levels.
When anti-buckling support met with frequently occurred earthquake (middle shake), because the small bore of core steel power consumption section sectional area is less, rate was introduced into the plastic deformation energy dissipation, and heavy in section power consumption section sectional area is large, is in elastic stage, does not participate in power consumption.Since frequently occurred earthquake load less, core steel small bore power consumption section deflection less (less than ± 2 △ L), spacing draw-in groove is not spacing, and the core steel can free-extension.
When anti-buckling support met with rarely occurred earthquake (large shake), because seismic (seismal is larger, the small bore power consumption section of core steel and heavy in section power consumption section all can enter the plastic deformation energy dissipation.When the deflection of core steel small bore power consumption section during greater than ± 2 △ L, the spacing draw-in groove of edge strip is spacing to small bore power consumption section deflection, at this moment small bore power consumption section no longer continues distortion, the load that increases passes to edge strip by positive stop lug boss, edge strip passes to protected apron again, heavy in section power consumption section continues to occur plastic strain, earthquake energy.
The anti-buckling support of section Core steel of the described segmentation power consumption that proposes according to said method is comprised of protected apron, core steel, edge strip and connecting bolt; Add edge strip between the protected apron, protected apron and edge strip are linked to be an integral body with bolt, and the core steel clamp is in the middle of protected apron; Have locating groove in the middle of the edge strip, both sides have spacing draw-in groove; The core steel is provided with positioning boss and positive stop lug boss, cooperates with locating groove and spacing draw-in groove on the edge strip respectively; The gap of positioning boss and locating groove very little (can be the zero clearance), positive stop lug boss and spacing draw-in groove arrange one and monolaterally are the gap of △ L; The sectional area that a groove changes the core steel is opened in the centre of core steel.It is characterized in that: the core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the cross section of heavy in section power consumption section is greater than the section area of small bore power consumption section.
Actual effectThe anti-buckling support of segmentation power consumption that the present invention proposes, can realize the anti-multistage earthquake protection of engineering structures that subtracts, when frequently occurred earthquake (middle shake) occurs, the power consumption section L1 power consumption of anti-buckling support core steel, when rarely occurred earthquake (large shake) occured, power consumption section L1, the L2 of anti-buckling support core steel participated in power consumption; Simultaneously, product arranges stopping means, and power consumption section L1 more and that supporting capacity is weak carries out deflection and load limit to core steel power consumption number of times, prevents power consumption section L1 early damage, guarantees the application life of product.
Description of drawings
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is schematic cross-section of the present invention;
Fig. 3 is edge strip schematic diagram of the present invention;
Fig. 4 is core steel schematic diagram of the present invention;
Fig. 5 is partial schematic diagram of the present invention;
Among the figure: 1 edge strip; 2 connecting bolts; 3 core steel; 4 protected aprons.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment one
Can find out from attached Fig. 1 and 2, the present invention relates to a kind of Segmental energy-consumption buckling-restrained brace method, power and the role suffered according to core steel each position when shockproof are different, the core steel are designed to the core steel of a variable cross-section, and whole core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the cross section of heavy in section power consumption section is greater than the section area of small bore power consumption section; Carry out antidetonation by small bore power consumption section from a heavy in section power consumption section state different in seismologies at different levels.
When anti-buckling support met with frequently occurred earthquake (middle shake), because the small bore of core steel power consumption section sectional area is less, rate was introduced into the plastic deformation energy dissipation, and heavy in section power consumption section sectional area is large, is in elastic stage, does not participate in power consumption.Since frequently occurred earthquake load less, core steel small bore power consumption section deflection less (less than ± 2 △ L), spacing draw-in groove is not spacing, and the core steel can free-extension.
When anti-buckling support met with rarely occurred earthquake (large shake), because seismic (seismal is larger, the small bore power consumption section of core steel and heavy in section power consumption section all can enter the plastic deformation energy dissipation.When the deflection of core steel small bore power consumption section during greater than ± 2 △ L, the spacing draw-in groove of edge strip is spacing to small bore power consumption section deflection, at this moment small bore power consumption section no longer continues distortion, the load that increases passes to edge strip by positive stop lug boss, edge strip passes to protected apron again, heavy in section power consumption section continues to occur plastic strain, earthquake energy.
The anti-buckling support of section Core steel of the described segmentation power consumption that proposes according to said method is comprised of protected apron 4, core steel 3, edge strip 1 and connecting bolt 2.Add edge strip 1 between the protected apron 4, edge strip 1 connects into an integral body with protected apron 4 usefulness connecting bolts 2, and core steel 3 is clipped in the middle; Leave the gap between core steel 3 and the protected apron 4, gap length can be regulated by edge strip 1 thickness; Have locating groove in the middle of the edge strip 1, both sides have spacing draw-in groove; Core steel 3 is provided with positioning boss and positive stop lug boss, cooperates with locating groove and spacing draw-in groove on the edge strip respectively.It is characterized in that: the core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the cross section of heavy in section power consumption section is greater than the section area of small bore power consumption section.
In order to increase support stiffness, protected apron 4 adopts the structural shape (such as Fig. 3) of welding hot-rolled channel-section steel on the panel, and the width of channel-section steel should not surpass 2/3 of core steel 3 power consumption section width.In order to reduce welding deformation, adopt the intermittent weld welding.The support stiffness of protected apron must satisfy the force request of power consumption support and protect the high-order flexing of core steel 3 power consumption sections.
Because the impact of pool river in Jiangsu Province which flows into the Huangpu River of Shanghai effect, can lateral expansion during core steel 3 power consumption section pressurized, so core steel 3 power consumption sections and protected apron 4,1 of edge strip must leave the gap.Core steel 3 power consumption sections are meeting through-thickness generation flexing generally, and the size in thickness direction gap can affect the power consumption fatigue life of core steel 3 power consumption sections, must be determined by computational analysis and verification experimental verification, generally gets 1～2mm(bilateral).The width gap needs only the lateral deformation greater than core steel 3 power consumption sections.The thickness that changes edge strip 1 can be regulated the gap of core steel 3 power consumption sections and protected apron 4 very easily.
In order to reduce the resistance of core steel 3 plastic strain, one deck silicone oil is smeared on front core steel 3 surfaces of assembling or aquadag increases lubricated.
Have locating groove in the middle of the edge strip 4, both sides have spacing draw-in groove, cooperate with positioning boss and positive stop lug boss on the core steel 3 respectively.The gap of positioning boss and locating groove very little (can be the zero clearance); Positive stop lug boss and spacing draw-in groove arrange one and monolaterally are the gap of △ L; core steel 3 power consumption section L1 can be in the scope of ± 2 △ L the Free Transform consumed energy; deflection is subjected to edge strip 1 spacing draw-in groove the L1 distortion of power consumption section and load are limited when surpassing ± 2 △ L; protect that it can not overload, super deformed and early damage; the value of △ L can be determined by the fatigue life test of product, advises being no more than 1% of power consumption section L1 length.
Claims (10)
1. a Segmental energy-consumption buckling-restrained brace method is characterized in that: according to core steel each position when shockproof suffered power and role difference, the core steel is designed to the core steel of a variable cross-section, whole core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the section area of heavy in section power consumption section is greater than the section area of small bore power consumption section; Carry out antidetonation by small bore power consumption section from a heavy in section power consumption section state different in seismologies at different levels.
2. Segmental energy-consumption buckling-restrained brace method as claimed in claim 1, it is characterized in that: when anti-buckling support meets with frequently occurred earthquake or middle shake, because the small bore of core steel power consumption section sectional area is less, rate is introduced into the plastic deformation energy dissipation, heavy in section power consumption section sectional area is large, be in elastic stage, do not participate in power consumption;
Because frequently occurred earthquake load less, core steel small bore power consumption section deflection is less, and spacing draw-in groove is not spacing, and the core steel can free-extension.
3. Segmental energy-consumption buckling-restrained brace method as claimed in claim 1, it is characterized in that: when anti-buckling support meets with rarely occurred earthquake or shakes greatly, because seismic (seismal is larger, the small bore power consumption section of core steel and heavy in section power consumption section all can enter the plastic deformation energy dissipation;
When the deflection of core steel small bore power consumption section during greater than ± 2 △ L, the spacing draw-in groove of edge strip is spacing to small bore power consumption section deflection, at this moment small bore power consumption section no longer continues distortion, the load that increases passes to edge strip by positive stop lug boss, edge strip passes to protected apron again, heavy in section power consumption section continues to occur plastic strain, earthquake energy.
4. the anti-buckling support of segmentation power consumption is comprised of protected apron, core steel, edge strip and connecting bolt; Add edge strip between the protected apron, edge strip and protected apron connect into an integral body with connecting bolt, the core steel clamp in the centre; Leave the gap between core steel and the protected apron, gap length can be regulated by edge strip thickness; Have locating groove in the middle of the edge strip, both sides have spacing draw-in groove; The core steel is provided with positioning boss and positive stop lug boss, cooperates with locating groove and spacing draw-in groove on the edge strip respectively; It is characterized in that: the core steel is divided into three sections; Wherein, one section is small bore power consumption section in the middle of the core steel, and small bore power consumption section both sides are symmetrically distributed with respectively one section heavy in section power consumption section, and the section area of heavy in section power consumption section is greater than the section area of small bore power consumption section.
5. buckling support is prevented in segmentation power consumption as claimed in claim 4, and it is characterized in that: protected apron adopts the structural shape of welding hot-rolled channel-section steel on the panel, and the width of channel-section steel should not surpass 2/3 of core steel power consumption section width; In order to reduce welding deformation, adopt the intermittent weld welding; The support stiffness of protected apron must satisfy the force request of power consumption support and protect the high-order flexing of core steel power consumption section.
6. buckling support is prevented in segmentation power consumption as claimed in claim 5, and it is characterized in that: the core steel is divided into linkage section, changeover portion and power consumption section, and linkage section links to each other with engineering structures; The sectional area that a groove changes the core steel is opened in the centre of core steel; Linkage section and transition section are larger, are in all the time elastic stage when being subjected to seismic (seismal, do not participate in power consumption.
7. the anti-buckling support of segmentation as claimed in claim 5 power consumption is characterized in that: for the sectional area that increases changeover portion with prevent flexing or unstability, changeover portion welding gusset.
8. the anti-buckling support of segmentation as claimed in claim 5 power consumption, it is characterized in that: be provided with positive stop lug boss between the power consumption section, the distortion that is used for the power consumption section is spacing; The middle part of core steel is provided with positioning boss.
9. the anti-buckling support of segmentation power consumption as claimed in claim 5 is characterized in that: must leave the gap between core steel power consumption section and protected apron, edge strip.
10. the anti-buckling support of segmentation as claimed in claim 5 power consumption, it is characterized in that: has locating groove in the middle of the edge strip, both sides have spacing draw-in groove, cooperate with positioning boss and positive stop lug boss on the core steel respectively; Positive stop lug boss and spacing draw-in groove arrange one and monolaterally are the gap of △ L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110133231 CN102261140B (en) | 2011-05-23 | 2011-05-23 | Segmental energy-consumption buckling-restrained brace method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110133231 CN102261140B (en) | 2011-05-23 | 2011-05-23 | Segmental energy-consumption buckling-restrained brace method and device |
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| CN102261140A CN102261140A (en) | 2011-11-30 |
| CN102261140B true CN102261140B (en) | 2013-02-27 |
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| CN105507442A (en) * | 2015-12-02 | 2016-04-20 | 同济大学 | Fishbone-shaped full-steel buckling-restrained brace |
| CN105604205B (en) * | 2016-03-03 | 2018-06-22 | 中国京冶工程技术有限公司 | Modularization bamboo shape buckling restrained brace |
| CN105672522B (en) * | 2016-04-05 | 2018-04-06 | 浙江建科减震科技有限公司 | The accurate adjustable laminated damper of tandem type bearing capacity and stiffness |
| CN114351888B (en) * | 2022-02-15 | 2023-05-26 | 河南理工大学 | Pressing plate buckling friction self-resetting damper |
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| CN101012670A (en) * | 2006-12-29 | 2007-08-08 | 北京工业大学 | Shearing wall constrained and galvanized iron sheet enveloped no-binding energy dissipating steel support and method for making same |
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