CN114351887A - Self-reset buckling-restrained brace device with replaceable energy consumption section - Google Patents

Self-reset buckling-restrained brace device with replaceable energy consumption section Download PDF

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Publication number
CN114351887A
CN114351887A CN202210071368.1A CN202210071368A CN114351887A CN 114351887 A CN114351887 A CN 114351887A CN 202210071368 A CN202210071368 A CN 202210071368A CN 114351887 A CN114351887 A CN 114351887A
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China
Prior art keywords
plate
energy dissipation
buckling
section
self
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CN202210071368.1A
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Chinese (zh)
Inventor
窦立军
方东健
张新
王新雅
曹景博
胡宁
罗澳国
田自强
胡晓宇
王子恒
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Changchun Institute of Applied Chemistry of CAS
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Changchun Institute of Applied Chemistry of CAS
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Priority to CN202210071368.1A priority Critical patent/CN114351887A/en
Publication of CN114351887A publication Critical patent/CN114351887A/en
Pending legal-status Critical Current

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Abstract

The invention provides a self-resetting buckling restrained brace device with a replaceable energy consumption section, which comprises an elastic brace section and a buckling energy consumption section, wherein the buckling energy consumption section is arranged in the middle part, and the elastic brace sections at two ends of the buckling energy consumption section are symmetrical components; the effect of the shock absorption damper is played under the action of medium and large earthquakes, the energy of the input structure is dissipated through deformation and damage of the supporting component, monitoring can be achieved after the component is earthquakes, and the energy-dissipating mild steel can be replaced only by detaching the bolts of the buckling energy-dissipating sections.

Description

Self-reset buckling-restrained brace device with replaceable energy consumption section
Technical Field
The invention belongs to the technical field of energy dissipation and shock absorption of civil engineering, and particularly relates to a self-resetting buckling-restrained brace device with a replaceable energy dissipation section.
Background
The buckling-restrained brace consists of an inner core component and a peripheral restraining component, wherein the inner core component bears axial pressure, and the peripheral component restrains the transverse displacement of the inner core component, so that the inner core component can generate full-section yielding under the action of axial pressure. The anti-lateral stiffness and strength can be provided for the main body structure under small earthquake, the earthquake energy can be consumed by utilizing the plastic deformation of the anti-lateral stiffness and strength during large earthquake, and the damage of the structure is reduced or even avoided, so that the anti-lateral stiffness and strength can be widely applied to engineering. However, the most serious disadvantage of this member is that it has a large deformation in case of a strong shock and cannot be automatically restored to its original position after yielding. And some removable self-reset supports need to be changed whole support when repairing after the earthquake at present, lead to that the restoration degree of difficulty is big and the cost is higher.
In addition, the deformation condition of the traditional buckling restrained brace after an earthquake happens cannot be monitored, and the traditional buckling restrained brace can be observed only by disassembling the whole support.
Disclosure of Invention
The invention aims to solve the problems that the prior buckling restrained brace needs to be replaced entirely and cannot be monitored during post-earthquake restoration, so that the self-resetting buckling restrained brace device with the replaceable energy consumption section is provided, the energy consumption section does not need to be replaced entirely during post-earthquake restoration, the buckling restrained brace can be automatically restored to the initial position after yielding, and the internal condition can be monitored.
In order to achieve the purpose, the invention provides a self-resetting buckling restrained brace device with replaceable energy dissipation sections, which comprises an elastic bracing section and a buckling energy dissipation section, wherein the buckling energy dissipation section is arranged in the middle, the elastic bracing sections at two ends of the buckling energy dissipation section are symmetrical components, the elastic bracing section comprises a steel pipe sleeve and a bracing section core plate, the bracing section core plate longitudinally penetrates through the steel pipe sleeve, and fine aggregate concrete is filled in the steel pipe sleeve; one end of the steel pipe sleeve is fixedly connected with a first end plate; the buckling energy dissipation section comprises an energy dissipation section core plate and two U-shaped steel plates, the energy dissipation section core plate is detachably connected with the supporting section core plate, an optical fiber grating sensor is arranged on the energy dissipation section core plate and connected with external optical fiber equipment, two ends of each U-shaped steel plate are fixedly connected with second end plates respectively, the two U-shaped steel plates are detachably sleeved on the outer side of the energy dissipation section core plate, two ends of each U-shaped steel plate are detachably connected with the first end plates respectively, prestressed ribs are arranged in steel pipe sleeves at two ends in a penetrating mode, and two ends of each prestressed rib are anchored at two ends of each steel pipe sleeve through an anchorage device.
Furthermore, the supporting section core plate is a cross connecting plate with bolt holes at two sides; the core plate of the energy dissipation section is two symmetrical T-shaped connecting plates, each T-shaped connecting plate comprises a mild steel plate and a second connecting plate, square notches are formed in the middle parts of two ends of each mild steel plate, the second connecting plates are welded to two sides of each notch, the size of each notch is matched with the thickness of each cross connecting plate, and bolt holes are formed in the second connecting plates; the plate with the cross connecting plate provided with the bolt hole is inserted into the middle of the second connecting plate and is connected by the bolt.
Furthermore, the soft steel plate has wide two ends, narrow middle and gradual transition at the junction of the width and the narrow.
Furthermore, the opening of the U-shaped steel plate is flanged outwards, bolt holes are formed in the flanged edge, and the two U-shaped steel plates are connected together through bolts.
Furthermore, the total number of the fiber bragg grating sensors is six, and the middle part of each energy consumption section core plate is provided with three sensors which are arranged at intervals.
Furthermore, the middle part of one side of the U-shaped steel plate is provided with a hole for penetrating through a connecting wire of the fiber grating sensor and the optical fiber equipment.
The self-resetting buckling restrained brace device with the replaceable energy dissipation sections provided by the invention has the advantages that the rigidity is provided for the structure under the action of a small earthquake; the function of a shock absorption damper is played under the action of medium and large earthquakes, and the energy of the input structure is dissipated through the deformation and the damage of the supporting member; the deformation and the damage of the supporting component are set in a weakening section of the core stress unit, namely a buckling energy consumption section of the buckling restrained brace, and the principle that local weakening of the core unit is equivalent to strengthening of other parts is utilized; the monitoring can be realized after the component is shaken, and the energy-consuming mild steel can be replaced only by detaching the bolt of the buckling energy-consuming section; due to the existence of the prestressed tendons, the member can be restored to the initial state after the earthquake; the fiber grating sensor can monitor the deformation condition in the buckling energy consumption section.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an installation view of the present invention;
FIG. 3 is a schematic view of a resilient support segment as described in the examples of the present invention;
FIG. 4 is a schematic view of a buckling energy dissipating segment as described in the examples of the present invention;
FIG. 5 is a schematic view of the connection of the energy dissipating mild steel to the connection plate according to the embodiment of the present invention;
wherein, 1, a steel tube sleeve; 2. a hole; 3. prestressed tendons; 4. a fiber grating sensor; 5. a first end plate; 6. a second end plate; 7. a U-shaped steel plate; 8. an anchorage device; 9. a cross connecting plate; 10. bolt holes; 11. a bolt; 12. a mild steel plate; 13. a second connecting plate.
Detailed Description
Referring to fig. 1 to 5, the self-resetting buckling-restrained brace with replaceable energy dissipation sections of the present invention includes an elastic bracing section and a buckling energy dissipation section, wherein the buckling energy dissipation section is disposed in the middle, the elastic bracing sections at the two ends of the buckling energy dissipation section are symmetrical members, and only one of the sections will be described below. The elastic support section comprises a square steel pipe sleeve 1, a cross connecting plate 9 is adopted for a core plate of the support section in the steel pipe sleeve 1 and is filled with fine aggregate concrete, four reserved holes are formed in the end part of the steel pipe sleeve 1, and bolt holes are formed in two sides of one of the two ends of the cross connecting plate 9. The prestressed tendons 3 penetrate through four reserved holes of the steel pipe sleeves 1 at two ends, and two ends of the prestressed tendons 3 are anchored at two ends of the steel pipe sleeves 1 by using anchors 8. First end plate 5 is welded all around to 1 one end of steel pipe sleeve, is equipped with the bolt hole on the first end plate 5 for connect the bucking power consumption section.
The buckling energy consumption section comprises two symmetrical prefabricated U-shaped steel plates 7 and second end plates 6 welded to the outer sides of two ends of the prefabricated U-shaped steel plates, the opening of each U-shaped steel plate is flanged outwards, bolt holes 10 are formed in the flanges, the two U-shaped steel plates 7 are connected together through bolts, two ends of each U-shaped steel plate 7 are fixedly connected with the second end plates 6 respectively, and bolt holes are formed in the second end plates 6. The second end plate 6 is bolted to the first end plate 5. The buckling energy consumption section comprises an energy consumption section core plate inside, the energy consumption section core plate is two symmetrical T-shaped connecting plates, each T-shaped connecting plate comprises a mild steel plate 12 and a second connecting plate 13, the junction of the mild steel plate 12 is wide at two ends, narrow in the middle and wide and narrow is gradually transited, square notches are formed in the middle of two ends of the mild steel plate 12, the second connecting plates 13 are welded on two sides of each notch, the size of each notch is matched with the thickness of the cross-shaped connecting plate 9, and bolt holes are formed in the second connecting plates 13; the cross connecting plate 9 is inserted with a bolt hole plate in the middle of the second connecting plate 13 and is connected by bolts. The outer side of the middle position of each mild steel plate 12 is pasted with three fiber bragg grating sensors 4 which are arranged at intervals, and the total number of the six fiber bragg grating sensors 4 is six. Meanwhile, a hole 2 is formed in the middle of one side of the U-shaped steel plate 7 and is used for penetrating through a connecting wire of the fiber grating sensor 4 and external optical fiber equipment to realize monitoring.
The manufacturing and mounting method comprises the following steps: firstly, an elastic supporting section is manufactured, a cross connecting plate 9 coated with non-adhesive materials is placed in the center of the steel pipe sleeve 1, two ends of the cross connecting plate extend out of the steel pipe sleeve 1, then fine aggregate concrete is filled, and a pore channel is reserved. Then the first end plate 5 is welded around the end of the steel tube sleeve 1. The cross connection plate 9 is prefabricated in the factory. And then manufacturing a resetting device, and anchoring the four prestressed tendons 3 through the reserved hole channels and the anchorage devices 8 at two ends of the steel pipe sleeve 1. And (3) installing a buckling energy consumption section next step, welding the second connecting plate 13 and the mild steel plate 12, attaching a sensor on the steel plate, and connecting the sensor with the cross connecting plate 9 with the bolt hole by utilizing the gap between the connecting plate and the steel plate through a bolt. The symmetrically prefabricated U-shaped steel plates 7 and the second end plate 67 are connected by welding, and then the two U-shaped steel plates 7 are bolted. When the buckling energy consumption section is disassembled, all bolts of the buckling energy consumption section are disassembled to be replaceable.
The working principle is as follows: when an earthquake occurs, the steel pipe sleeve 1 and the U-shaped steel plate 7 on the outer side of the self-reset buckling-restrained brace, with replaceable energy dissipation sections, restrain the transverse displacement of the inner side component, because the T-shaped connecting plate is made of low-yield-point steel, and the cross section of the middle part of the T-shaped connecting plate is small, the damage is concentrated on the buckling energy dissipation section by using the principle that local weakening is equivalent to the reinforcement of other parts, so that the T-shaped connecting plate generates full-section yielding, the T-shaped connecting plate can provide lateral rigidity and strength for a main body structure under the condition of small earthquake, and can consume earthquake energy by using the plastic deformation of the T-shaped connecting plate during the major earthquake, reduce or even avoid the damage of the structure, and meanwhile, the buckling energy dissipation section can be replaced by only dismantling the connecting bolts at the two ends and inside of the buckling energy dissipation section. Due to the existence of the prestressed tendons 3, the member can be restored to the initial state after an earthquake.

Claims (6)

1. The self-reset buckling-restrained brace device with the replaceable energy dissipation sections is characterized by comprising an elastic brace section and a buckling energy dissipation section, wherein the buckling energy dissipation section is arranged in the middle of the self-reset buckling-restrained brace device, the elastic brace sections at two ends of the buckling energy dissipation section are symmetrical components, each elastic brace section comprises a steel pipe sleeve (1) and a brace section core plate, the brace section core plates (9) longitudinally penetrate through the steel pipe sleeves (1), and fine aggregate concrete is filled in the steel pipe sleeves (1); one end of the steel tube sleeve (1) is fixedly connected with a first end plate (5); the buckling energy dissipation section comprises an energy dissipation section core plate and two U-shaped steel plates (7), the energy dissipation section core plate is detachably connected with a support section core plate (9), an optical fiber grating sensor (4) is arranged on the energy dissipation section core plate, the optical fiber grating sensor (4) is connected with external optical fiber equipment, two ends of each U-shaped steel plate (7) are fixedly connected with a second end plate (6) respectively, the two U-shaped steel plates (7) are detachably sleeved on the outer side of the energy dissipation section core plate, two ends of each U-shaped steel plate are detachably connected with a first end plate (5) respectively, a prestressed rib (3) penetrates through the steel pipe sleeves (1) at two ends of each prestressed rib (3), and the two ends of each prestressed rib (3) are anchored at two ends of each steel pipe sleeve (1) through an anchorage device (8).
2. The self-resetting buckling restrained brace device with replaceable energy dissipation segments as claimed in claim 1, wherein: the supporting section core plate (9) is a cross connecting plate with bolt holes at two sides; the core plate of the energy dissipation section is two symmetrical T-shaped connecting plates, each T-shaped connecting plate comprises a mild steel plate (12) and a second connecting plate (13), square openings are formed in the middles of two ends of each mild steel plate (12), the second connecting plates (13) are welded to two sides of each opening, the size of each opening is matched with the thickness of each cross connecting plate, and bolt holes are formed in the second connecting plates (13); the plate with the cross connecting plate provided with the bolt hole is inserted into the middle of the second connecting plate (13) and is connected by bolts.
3. The self-resetting buckling restrained brace device with replaceable energy dissipation segments as claimed in claim 2, wherein: the soft steel plate (12) is wide at two ends, narrow in the middle and gradually transited at the wide-narrow junction.
4. The self-resetting buckling restrained brace device with replaceable energy dissipation segments as claimed in claim 1, wherein: the opening of the U-shaped steel plate (7) is flanged outwards, bolt holes are formed in the flanges, and the two U-shaped steel plates (7) are connected together through bolts.
5. The self-resetting buckling restrained brace device with replaceable energy dissipation segments as claimed in claim 1, wherein: the fiber bragg grating sensors (4) are six in total, and the middle of each energy consumption section core plate is provided with three sensors which are arranged at intervals.
6. The self-resetting buckling restrained brace device with replaceable energy dissipation segments as claimed in claim 1, wherein: and the middle part of one side of the U-shaped steel plate (7) is provided with a hole (2) for penetrating through the fiber grating sensor (4) and a connecting wire of optical fiber equipment.
CN202210071368.1A 2022-01-21 2022-01-21 Self-reset buckling-restrained brace device with replaceable energy consumption section Pending CN114351887A (en)

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Application Number Priority Date Filing Date Title
CN202210071368.1A CN114351887A (en) 2022-01-21 2022-01-21 Self-reset buckling-restrained brace device with replaceable energy consumption section

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Application Number Priority Date Filing Date Title
CN202210071368.1A CN114351887A (en) 2022-01-21 2022-01-21 Self-reset buckling-restrained brace device with replaceable energy consumption section

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CN114351887A true CN114351887A (en) 2022-04-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114046077A (en) * 2021-10-09 2022-02-15 重庆大学 Assembled double-sleeve self-resetting energy-consuming steel support with SMA cable
CN115045410A (en) * 2022-06-13 2022-09-13 海南震控智能科技有限公司 Replaceable anti-seismic energy dissipation support

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Publication number Priority date Publication date Assignee Title
CN2778920Y (en) * 2004-12-31 2006-05-10 郑兆宏 Laying type double opening beam buckling trammel tenacity supporting device
CN102817422A (en) * 2012-08-31 2012-12-12 清华大学 Prestressed concrete constraining buckling-restrained brace
CN103195186A (en) * 2013-04-11 2013-07-10 北京工业大学 Steel pipe assembling steel structure prestressed buckling preventing support
CN103266683A (en) * 2013-06-04 2013-08-28 北京听风庐文化发展有限公司 Core-replaceable partial filling type double-sleeve buckling-preventing support
CN203452222U (en) * 2013-07-26 2014-02-26 柳州东方工程橡胶制品有限公司 Buckling-restrained support capable of self restoring when being subjected to tension
CN103981969A (en) * 2014-04-12 2014-08-13 北京工业大学 In-line angle steel prefabricated steel structural self-resetting buckling-restrained brace
KR20170014540A (en) * 2015-07-30 2017-02-08 부산대학교 산학협력단 Buckling Restraint Brace with assembly type steel restraint material
CN206309097U (en) * 2016-12-15 2017-07-07 广州华森建筑与工程设计顾问有限公司 The replaceable assembled buckling restrained brace of section is surrendered after one kind shake
CN206448395U (en) * 2017-04-25 2017-08-29 江苏路博减振技术有限公司 A kind of intelligent buckling restrained brace
CN108643671A (en) * 2018-05-23 2018-10-12 北京工业大学 A kind of anti-buckling support of four steel tube binding types of replaceable cross kernel
CN111042324A (en) * 2019-12-27 2020-04-21 东北林业大学 Assembled buckling restrained brace of removable inner core
CN111733999A (en) * 2020-07-13 2020-10-02 哈尔滨工业大学 Built-in steel plate staggered through assembled X-shaped buckling-restrained brace

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2778920Y (en) * 2004-12-31 2006-05-10 郑兆宏 Laying type double opening beam buckling trammel tenacity supporting device
CN102817422A (en) * 2012-08-31 2012-12-12 清华大学 Prestressed concrete constraining buckling-restrained brace
CN103195186A (en) * 2013-04-11 2013-07-10 北京工业大学 Steel pipe assembling steel structure prestressed buckling preventing support
CN103266683A (en) * 2013-06-04 2013-08-28 北京听风庐文化发展有限公司 Core-replaceable partial filling type double-sleeve buckling-preventing support
CN203452222U (en) * 2013-07-26 2014-02-26 柳州东方工程橡胶制品有限公司 Buckling-restrained support capable of self restoring when being subjected to tension
CN103981969A (en) * 2014-04-12 2014-08-13 北京工业大学 In-line angle steel prefabricated steel structural self-resetting buckling-restrained brace
KR20170014540A (en) * 2015-07-30 2017-02-08 부산대학교 산학협력단 Buckling Restraint Brace with assembly type steel restraint material
CN206309097U (en) * 2016-12-15 2017-07-07 广州华森建筑与工程设计顾问有限公司 The replaceable assembled buckling restrained brace of section is surrendered after one kind shake
CN206448395U (en) * 2017-04-25 2017-08-29 江苏路博减振技术有限公司 A kind of intelligent buckling restrained brace
CN108643671A (en) * 2018-05-23 2018-10-12 北京工业大学 A kind of anti-buckling support of four steel tube binding types of replaceable cross kernel
CN111042324A (en) * 2019-12-27 2020-04-21 东北林业大学 Assembled buckling restrained brace of removable inner core
CN111733999A (en) * 2020-07-13 2020-10-02 哈尔滨工业大学 Built-in steel plate staggered through assembled X-shaped buckling-restrained brace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114046077A (en) * 2021-10-09 2022-02-15 重庆大学 Assembled double-sleeve self-resetting energy-consuming steel support with SMA cable
CN114046077B (en) * 2021-10-09 2024-05-24 重庆大学 Assembled double-sleeve self-resetting energy-consumption steel support with SMA cable
CN115045410A (en) * 2022-06-13 2022-09-13 海南震控智能科技有限公司 Replaceable anti-seismic energy dissipation support

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