CN110820977A - Viscoelastic coupling beam damper with unidirectional shearing deformation - Google Patents

Viscoelastic coupling beam damper with unidirectional shearing deformation Download PDF

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Publication number
CN110820977A
CN110820977A CN201911032381.0A CN201911032381A CN110820977A CN 110820977 A CN110820977 A CN 110820977A CN 201911032381 A CN201911032381 A CN 201911032381A CN 110820977 A CN110820977 A CN 110820977A
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CN
China
Prior art keywords
shaped steel
viscoelastic
connecting piece
shaped
damper
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Pending
Application number
CN201911032381.0A
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Chinese (zh)
Inventor
周颖
刘晓芳
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Tongji University
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Tongji University
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Publication date
Application filed by Tongji University filed Critical Tongji University
Priority to CN201911032381.0A priority Critical patent/CN110820977A/en
Publication of CN110820977A publication Critical patent/CN110820977A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

Abstract

The invention relates to a viscoelastic beam connecting damper with unidirectional shearing deformation, which comprises viscoelastic damping materials, C-shaped steel and connecting pieces. According to the invention, the viscoelastic damping material is connected with the C-shaped steel and added into the coupling beam damper, compared with the traditional steel coupling beam damper, the energy consumption capability of the coupling beam damper under small earthquake and wind vibration and the fatigue performance under reciprocating load are improved, and the defects that the traditional viscoelastic damper has low shear rigidity and cannot provide effective constraint for shear walls on two sides of the coupling beam are overcome. The invention is suitable for energy dissipation and shock absorption of high-rise and super high-rise buildings.

Description

Viscoelastic coupling beam damper with unidirectional shearing deformation
Technical Field
The invention belongs to the field of energy dissipation and shock absorption of buildings.
Background
The reinforced concrete shear wall structure has high lateral stiffness and high bearing capacity, and occupies an important position in various high-rise structure systems. Due to the needs of opening doors and windows and other openings in buildings, connecting beams with high span ratio are often formed after the openings are formed in the shear wall, and a connected shear wall structure is formed. The connecting beam in the shear wall is used as a first defense line for seismic fortification, and shear damage often occurs in an earthquake. The coupling beam not only needs to have sufficient strength and rigidity to provide sufficient restraint for the shear wall limbs, but also needs to dissipate a large amount of seismic energy to protect the shear wall limbs from severe damage. The stress characteristics of the connecting beam under the action of an earthquake are that the midspan bending moment is minimum, and the shearing force is uniformly distributed, so that the connecting beam can be cut off midspan, and the shearing type energy dissipation damper can be arranged. Therefore, the deformation of the connecting beam under the action of an earthquake can be concentrated at the position of the damper, a large amount of energy is consumed by utilizing the plasticity of the damper after yielding, and the wall limbs and the energy-consuming connecting beam concrete part are protected from being greatly damaged.
The viscoelastic damper is a common passive vibration damping (shock) control device, is simple to mount, low in manufacturing cost and excellent in performance, and has wide engineering application prospect in vibration control along with the appearance of more and more viscoelastic materials with excellent performance. Compared with the steel coupling beam damper which is widely researched at present, the viscoelastic coupling beam damper has more excellent fatigue performance under reciprocating load, has very small shear rigidity, and can consume energy under the condition of small deformation, so that the viscoelastic coupling beam damper not only can reduce the response of a building under an earthquake, but also is very effective in reducing the wind vibration response of a high-rise building in normal use.
However, the viscoelastic damper is not widely used in the construction and research of the coupling beam. Firstly, the horizontal rigidity of the coupling beam provides enough constraint for the wall limb of the shear wall, so that the seismic performance of the coupled shear wall structure under the action of an earthquake is ensured, but the rigidity of the viscoelastic damper is low, and the viscoelastic damper can be changed under the influence of factors such as load frequency and the like, so that the traditional viscoelastic damper cannot meet the rigidity requirement of the coupling beam. In addition, traditional viscoelastic damper adopts the steel sheet to cohere with viscoelastic material more and forms, and steel sheet off-plate rigidity is less, and under the condition that the steel sheet thickness is thinner or have initial defect, buckling instability can take place, though increase steel sheet thickness can improve this shortcoming, nevertheless can make structure weight and engineering cost greatly increased, also can restrict viscoelastic material's volume and account for than, is unfavorable for the power consumption ability of furthest's performance viscoelastic damper.
Disclosure of Invention
Based on the method, the structural technical scheme is further disclosed as follows:
the utility model provides a viscoelastic even roof beam attenuator of unidirectional shear variant which characterized in that, is including viscoelastic damping material, C shaped steel and connecting piece, wherein:
the connecting piece has two, and first connecting piece 1 is the T type, and second connecting piece 2 is the style of calligraphy, and connecting piece one end stretches into and anchors in even roof beam reinforced concrete section 4, and the other end is connected to C shaped steel central area, C shaped steel central area comprises first connecting piece 1, the respective C shaped steel of second connecting piece 2 is crisscross, is equipped with glutinous elastic damping material 3 in the space between the crisscross C shaped steel.
In the central area, the contact part of the viscoelastic damping material 3, the C-shaped steel and the connecting piece is bonded through vulcanization.
Each C-shaped steel, namely the C-shaped steel plate, is composed of paired U-shaped steels which are symmetrically connected to two sides of a symmetry axis where the connecting piece is located. The U-shaped steel can be made of steel plates or section steel and the like.
The axis of the connecting piece is superposed with the axis of the connecting beam reinforced concrete section 4.
The connecting piece can be formed by processing steel plates or section steel and extends into the connecting beam reinforced concrete section 4.
This application technical scheme is when actual implementation is used, and the viscoelastic even roof beam upside at roof beam attenuator place has floor etc. even, and the height that highly is less than even roof beam reinforced concrete section of connecting piece guarantees that viscoelastic attenuator has the space of fully taking place shear deformation.
In the central area, the connecting piece and the respective C-shaped steel can be connected by welding or the like, and the connecting piece and the C-shaped steel can be simultaneously processed by adopting a casting method.
The height of the C-shaped steel is smaller than that of the reinforced concrete section of the connecting beam where the viscoelastic connecting beam damper is located.
The first connecting piece 1 is T-shaped, at least one C-shaped steel connected with the first connecting piece is a second C-shaped steel 11; the second connecting piece 2 is in a straight line shape, and at least two connected C-shaped steels are a first C-shaped steel 21 and a third C-shaped steel 22; the first C-shaped steel, the second C-shaped steel and the third C-shaped steel are in surrounding relation from inside to outside, and the size relation of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel is increased in sequence. In the assembled coupling beam damper, the C-shaped steels of the first connecting piece 1 and the second connecting piece 2 are distributed in a staggered mode according to the position sequence of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel to form a C-shaped steel central area.
The viscoelastic damping material is bonded between the C-shaped steels or between the C-shaped steels and the connecting piece through vulcanization or other technical means. The thickness of the viscoelastic material of the same layer should remain the same.
The principle of the invention is as follows: under side direction load (earthquake load, wind load etc.), even the reinforced concrete section 4 of roof beam both sides drives this application even the connecting piece of roof beam attenuator and the C shaped steel that links to each other and takes place relative dislocation from top to bottom to drive the viscoelastic damping material between the C shaped steel and between C shaped steel and the connecting piece and take place to cut the deformation, dissipate the energy of inputing in the structure. Because this application has adopted C shaped steel, the deformation of viscoelastic even roof beam attenuator is limited to vertical direction only, has improved the attenuator and has been linking the drawing and pressing rigidity of roof beam axial direction, and then has improved the restraint effect of even roof beam to both sides shear force wall limb at the horizontal direction of area viscoelastic damper. In addition, compare with adopting ordinary steel sheet, the C shaped steel face external rigidity that this application adopted is big, consequently can be satisfying under the prerequisite of the out-of-plane rigidity requirement, increase viscoelastic material's volume proportion, the power consumption damping effect of full play viscoelastic damper.
Compare with current even roof beam attenuator, the advantage of this application is:
1. compared with the existing metal coupling beam damper, the viscoelastic coupling beam damper can consume energy under small deformation, not only can reduce the response of the structure under earthquake load, but also can reduce the response of the structure under wind load during normal use, and improve the comfort level of the structure; in addition, the viscoelastic material has excellent fatigue performance under reciprocating load, and is favorable for ensuring the energy dissipation and vibration reduction performance of the structure in long-term earthquake and aftershock.
2. Compare with other viscoelastic damper now, this application viscoelastic damper improves the rigidity of other horizontal direction (even roof beam axial) with viscoelastic material's shear deformation restriction in vertical direction, can satisfy the rigidity condition of being applied to even roof beam.
3. Compare with other current viscoelastic damper, the steel sheet in traditional viscoelastic damper is replaced to C shaped steel in this application, under the prerequisite that does not increase or even reduce with the steel volume, has improved the off-plate rigidity of attenuator, increases viscoelastic material's volume ratio to improve the power consumption ability of even roof beam attenuator.
Drawings
FIG. 1 is a top view of a viscoelastic beam damper according to the invention in a unidirectional shear variant;
fig. 2 is a top view of the first connector 1 of the present invention;
fig. 3 is a top view of the second connector 2 of the present invention.
Reference numbers in the figures:
the damping device comprises a first connecting piece 1, a second connecting piece 2, a viscoelastic damping material 3, a connecting beam reinforced concrete section 4 and a second C-shaped steel 11; a first C-shaped steel 21 and a third C-shaped steel 22.
Detailed Description
The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.
It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments.
Example 1: viscoelastic coupling beam damper with unidirectional shearing deformation
As shown in the figures 1-3 of the drawings,
firstly, structural design:
the utility model provides a viscoelastic even roof beam attenuator of unidirectional shear variant which characterized in that, includes viscoelastic damping material 3, C shaped steel and connecting piece, wherein:
the connecting piece has two, and first connecting piece 1 is the T type, and second connecting piece 2 is the style of calligraphy in one, and connecting piece avris one end stretches into and anchors in even roof beam reinforced concrete section 4, and the other end is connected to C shaped steel central area, C shaped steel central area comprises first connecting piece 1, the respective C shaped steel of second connecting piece 2 is crisscross, is equipped with glutinous elastic damping material 3 in the space between the crisscross C shaped steel.
In the central area, the contact part of the viscoelastic damping material 3, the C-shaped steel and the connecting piece is connected through vulcanization.
Each C-shaped steel, namely the C-shaped steel plate, is composed of paired U-shaped steels which are symmetrically connected to two sides of a symmetry axis where the connecting piece is located. The U-shaped steel can be made of steel plates or section steel and the like.
The axis of the connecting piece is superposed with the axis of the connecting beam reinforced concrete section 4.
The first connecting piece 1 is T-shaped, at least one C-shaped steel connected with the first connecting piece is a second C-shaped steel 11; the second connecting piece 2 is in a straight line shape, and at least two connected C-shaped steels are a first C-shaped steel 21 and a third C-shaped steel 22; the first C-shaped steel, the second C-shaped steel and the third C-shaped steel are in surrounding relation from inside to outside, and the size relation of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel is increased in sequence. In the assembled coupling beam damper, the C-shaped steels of the first connecting piece 1 and the second connecting piece 2 are distributed in a staggered mode according to the position sequence of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel to form a C-shaped steel central area.
Secondly, installation process:
firstly, manufacturing two connecting pieces (1, 2) and C-shaped steel by adopting steel plates or section steel, and assembling the two connecting pieces with the C-shaped steel together to ensure that the C-shaped steel connected with different connecting pieces (T-shaped or straight-line-shaped) is arranged in a staggered way;
then, the viscoelastic material 3 is placed into the central area and bonded, and the thickness of the viscoelastic material of the same layer is kept the same;
and finally, extending one end of the side of each connecting piece into the connecting beam reinforced concrete section 4 and anchoring the connecting beam reinforced concrete section.
The above are typical examples of the present invention, and the practice of the present invention is not limited thereto.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.

Claims (5)

1. The utility model provides a viscoelastic even roof beam attenuator of unidirectional shear variant which characterized in that, includes viscoelastic damping material (3), C shaped steel and connecting piece, wherein:
the connecting piece has two, and first connecting piece (1) is the T type, and second connecting piece (2) are the style of calligraphy, and connecting piece avris one end stretches into and anchors in even roof beam reinforced concrete section (4), and the other end is connected to C shaped steel central area, C shaped steel central area comprises first connecting piece (1), the respective C shaped steel of second connecting piece (2) is crisscross, is equipped with glutinous elasticity damping material (3) in the space between the crisscross C shaped steel.
2. The viscoelastic beam damper according to claim 1, wherein the first connecting member (1) is T-shaped, and at least one of the C-shaped steels connected thereto is a second C-shaped steel (11); the second connecting piece (2) is in a straight shape, and at least two connected C-shaped steels are a first C-shaped steel (21) and a third C-shaped steel (22); the first C-shaped steel, the second C-shaped steel and the third C-shaped steel are in surrounding relation from inside to outside, and the size relation of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel is increased in sequence. In the assembled coupling beam damper, the C-shaped steels of the first connecting piece (1) and the second connecting piece (2) are distributed in a staggered mode according to the position sequence of the first C-shaped steel, the second C-shaped steel and the third C-shaped steel to form a C-shaped steel central area.
3. The viscoelastic beam damper according to claim 1, wherein each of the C-shaped steels is a C-shaped steel plate consisting of a pair of U-shaped steels symmetrically connected to both sides of a symmetry axis on which the connecting member is located.
4. Viscoelastic beam damper according to the unidirectional shear variant of claim 1, characterized in that the axis of the connecting piece coincides with the axis of the reinforced concrete section (4) of the connecting beam.
5. The viscoelastic beam damper of one-way shear modification of claim 1, wherein the height of the C-shaped steel and the height of the connecting member are both less than the height of the reinforced concrete section of the beam in which the viscoelastic beam damper is located.
CN201911032381.0A 2019-10-28 2019-10-28 Viscoelastic coupling beam damper with unidirectional shearing deformation Pending CN110820977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911032381.0A CN110820977A (en) 2019-10-28 2019-10-28 Viscoelastic coupling beam damper with unidirectional shearing deformation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911032381.0A CN110820977A (en) 2019-10-28 2019-10-28 Viscoelastic coupling beam damper with unidirectional shearing deformation

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Publication Number Publication Date
CN110820977A true CN110820977A (en) 2020-02-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022011644A1 (en) * 2020-07-16 2022-01-20 大连理工大学 Energy dissipation connection apparatus for prefabricated assemble-type wall

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022011644A1 (en) * 2020-07-16 2022-01-20 大连理工大学 Energy dissipation connection apparatus for prefabricated assemble-type wall
US11401712B2 (en) 2020-07-16 2022-08-02 Dalian University Of Technology Energy-consuming connecting device for prefabricated assembled wall

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