CN110886403A - Novel combined shearing bending damper - Google Patents
Novel combined shearing bending damper Download PDFInfo
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- CN110886403A CN110886403A CN201911152404.1A CN201911152404A CN110886403A CN 110886403 A CN110886403 A CN 110886403A CN 201911152404 A CN201911152404 A CN 201911152404A CN 110886403 A CN110886403 A CN 110886403A
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- 238000005452 bending Methods 0.000 title claims abstract description 29
- 238000010008 shearing Methods 0.000 title abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 239000007769 metal material Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 abstract description 34
- 230000009931 harmful effect Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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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
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- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to the field of building earthquake resistance, in particular to a novel combined shear bending damper. The damper of the present invention comprises: the device comprises two end plates, a web plate, two flange plates and at least one pair of rectangular steel plates; a web plate is connected between the upper end plate and the lower end plate, and the upper end plate is connected with the upper top of the flange plate; the lower end plates are respectively connected with the flange plates; at least one pair of rectangular steel plates are arranged on two sides of the web plate; the upper top ends of all the rectangular steel plates are connected with the upper end plate; the lower bottom ends of the three pairs of rectangular steel plates are connected with the lower end plate. The invention overcomes the problems that the hysteresis performance of the shearing type metal damper is not as stable as that of the bending type metal damper and the rigidity and the strength of the shearing type metal damper are obviously higher than those of the bending type metal damper due to the harmful influence generated by out-of-plane buckling, improves the hysteresis performance of the shearing type metal damper, ensures that the shearing type metal damper has stable hysteresis performance and has the rigidity and the strength of the shearing type metal damper.
Description
Technical Field
The invention relates to the field of building earthquake resistance, in particular to a novel combined shear bending damper.
Background
In metal dampers, seismic input energy is dissipated through inelastic deformation of the metal. Metal dampers are widely used in the seismic protection of structures due to their simple, economical and efficient energy dissipation mechanisms.
Various types of metal dampers have been developed over the past several decades and can be generally classified into a shear type and a bending type. Shear-type metal dampers, which utilize shear plastic deformation of the metal plate to dissipate energy, typically have an "I" section with a web for dissipating energy under shear deformation and flanges on either side of the web for providing end restraint to the web. Thus, the yield may be evenly distributed in the web, while the flanges remain mostly elastic. On the other hand, curved metal dampers, in which a series of "X" -shaped, triangular, diamond-shaped or perforated metal plates are placed in parallel and designed with fixed end conditions, use the bending plastic deformation of the metal plates to dissipate energy. Thus, the bending curvature may be evenly distributed along the height of the plate, so that yielding may occur simultaneously over the height of the plate, thereby enabling an economical and optimal use of the metal material. However, due to the detrimental effects of out-of-plane buckling, the hysteresis of the shear-type metal damper is less stable than that of the bending-type metal damper, and the stiffness and strength of the shear-type metal damper are significantly greater than those of the bending-type metal damper.
It is thus proposed to combine both types of dampers to take advantage of their respective advantages. A novel shear bend combination damper is made by combining a bend damper with a shear damper, wherein out-of-plane buckling of the web in the shear plate damper is limited by the bend damper. The paired rectangular steel plates with the same shape can be used as an integrated damping unit to interactively work, so that the novel shearing bending damper has stable hysteresis performance of a bending metal damper. And the rigidity and the strength of the shear type metal damper are combined. It is possible to maintain sufficient structural stability of the building during intense seismic movements. The novel damper is arranged on the top of the support, so that the installation framework of the novel damper is not restricted by space. Therefore, the development of a combined shear bending damper has important engineering significance. In addition, the shear bending damper has low manufacturing cost and is convenient for mass production, and the rectangular steel plate can be easily replaced after a serious earthquake event occurs due to bending yield.
CN202731009U discloses a combined shear type metal damper, which is characterized in that: the shearing energy consumption unit comprises an upper rigid connecting plate and a lower rigid connecting plate which are parallel to each other, wherein a plurality of shearing energy consumption units are arranged between the upper rigid connecting plate and the lower rigid connecting plate, two ends of each shearing energy consumption unit respectively lean against the lower surface of the upper rigid connecting plate and the upper surface of the lower rigid connecting plate, and the shearing energy consumption units are located on the same plane.
The combined shearing type metal damper can effectively improve the energy dissipation effect, reduce the centralized influence of the damper on the stress of the structure and is convenient to install. However, no solution is proposed for improving the hysteresis performance of the shear damper to provide a stable hysteresis performance of the shear bending damper.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel combined shear bending damper, which improves the hysteresis performance of the shear damper and ensures that the shear bending damper has stable hysteresis performance; and the rigidity and the strength of the shear type metal damper are combined. Under the condition of not changing the volume of the shear damper, the hysteresis performance of the shear bending damper is more stable; meanwhile, the rigidity and the bearing capacity of the damper can be improved. Not only increases the strength, rigidity and bearing capacity of the damper, but also is convenient to process and install, and reduces the production period and cost.
The invention is realized by the following technical scheme:
the present invention provides a combined shear bending damper comprising: the device comprises two end plates, a web plate, two flange plates and at least one pair of rectangular steel plates;
the two end plates are respectively an upper end plate and a lower end plate;
the two flange plates are respectively a first flange plate and a second flange plate;
a web plate is connected between the upper end plate and the lower end plate, and the upper end plate is respectively connected with the upper tops of the first flange plate and the second flange plate; the lower end plate is respectively connected with the lower bottoms of the first flange plate and the second flange plate;
the two ends of the web plate are respectively provided with a first flange plate and a second flange plate, and the two sides of the web plate are provided with at least one pair of rectangular steel plates;
the upper top ends of all the rectangular steel plates are connected with the upper end plate; the lower bottom ends of the three pairs of rectangular steel plates are connected with the lower end plate.
Preferably, the damper provided by the present invention comprises: the device comprises two end plates, a web plate, two flange plates and three pairs of rectangular steel plates;
the two end plates are respectively an upper end plate and a lower end plate;
the two flange plates are respectively a first flange plate and a second flange plate;
a web plate is connected between the upper end plate and the lower end plate, and the upper end plate is respectively connected with the upper tops of the first flange plate and the second flange plate; the lower end plate is respectively connected with the lower bottoms of the first flange plate and the second flange plate;
the two ends of the web plate are respectively provided with a first flange plate and a second flange plate, and the two sides of the web plate are provided with three pairs of rectangular steel plates which are respectively a first rectangular steel plate, a second rectangular steel plate, a third rectangular steel plate, a fourth rectangular steel plate, a fifth rectangular steel plate and a sixth rectangular steel plate; the web plate and the three pairs of rectangular steel plates have smaller gaps;
the upper top ends of the three pairs of rectangular steel plates are connected with the upper end plate; the lower bottom ends of the three pairs of rectangular steel plates are connected with the lower end plate.
The spacing between adjacent rectangular steel plates is equal.
Each pair of rectangular steel plates are symmetrically distributed on two sides of the web plate.
The web is a plate made of a metal material having low yield strength and high deformation characteristics, and the planar shape of the web is rectangular. The web material needs shearing work and energy consumption, so that a metal material with a low yield point and high ductility (LY160 steel plate or other metal materials with a low yield point and high ductility) is adopted, and the planar shape of the web 1 is rectangular and is formed by mechanical horizontal cutting.
The flange end plate and the upper and lower end plates can be made of Q345 steel or other high-strength steel which is easy to process and low in price. The flange end plates and the upper and lower end plates are rectangular in planar shape and are formed by mechanical horizontal cutting.
The three pairs of rectangular steel plates are steel plates made of a metal material having low yield strength and high deformation characteristics. Because the metal plate needs to be bent to do work, the metal plate is made of metal materials with low yield point and strong ductility, the planar shape is rectangular, and the metal plate can be formed by mechanical horizontal cutting of a seamless steel plate with low yield point. The rectangular steel plate, the web plate and the flange end plate ascend. The upper and lower corners of the inside of the rectangular steel plate are cut to form access holes (i.e., upper holes) so that the fillet welds along the top and bottom edges of the web can pass through.
The first flange plate and the second flange plate are high-strength steel plates, and the cross section of each flange plate is rectangular.
The first flange end plate and the second flange end plate are equal in height, and the first flange end plate and the second flange end plate are connected with the frame beam and the herringbone support end plate respectively through bolt connection; the total height H of the damper is 260-300 mm, the height H of a web plate, a rectangular steel plate and a first flange plate of the damper is 220-260 mm, and the thickness t of the rectangular steel platekThe value range is between 8 mm and 12mm, and the thickness t of the first flange plate and the second flange platedThe value is 8-14 mm; end plate thickness t of frame beam and herringbone supportaValue takingIs 20mm, the thickness of the web plate is in a value range tw：
Preferably, the first flange end plate and the second flange end plate provided by the invention are equal in height, and the first flange end plate and the second flange end plate are respectively connected with the frame beam and the herringbone support through bolt connection; the total height H of the damper is 280mm, the height H of a web plate, a rectangular steel plate, a first flange end plate and a second flange end plate of the damper is 240mm, and the thickness t of the rectangular steel plate iskThe value range is 10mm, and the thickness t of the first flange end plate and the second flange end platedThe value is 12 mm; thickness t of end plate for connecting frame beam and herringbone support up and downaThe thickness of the web is 20mm and the range t of the web thicknessw：
The invention has the beneficial effects that:
(1) the invention can realize all industrial production, can be directly assembled on site, improves the construction efficiency, reduces the environmental pollution of the construction site and improves the assembly rate. The metal damper is easy to manufacture and install and low in price;
(2) the damper is composed of four parts which are welded or bolted, and the steel plates are connected to be stressed in bending or shearing, so that the rigidity and the bearing capacity of the damper are improved, and the hysteresis performance of the damper is more stable;
(3) the damper is small in size, can be directly installed on the top of the support, does not need to consider the size and installation problems of the damper, and has sufficient space for use at the bottom or the top of the support, so that the construction quality and efficiency are improved;
(4) the damper has no obvious connection between shearing energy consumption and bending energy consumption, and works independently, so that the damper can dissipate energy better.
Drawings
FIG. 1 is a view of the mounting location of the shear bend damper of the present invention;
FIG. 2 is a sample view of the shear bend damper of the present invention as shown in FIG. 1A;
FIG. 3 is a plan view of the shear bend damper of the present invention;
FIG. 4 is a top view of the shear bend damper of the present invention;
FIG. 5 is a left side view of the shear bend damper of the present invention;
FIG. 6 is a detail sample view of B of FIG. 5 of the shear bend damper of the present invention;
FIG. 7 is a force diagram of the shear bend damper of the present invention;
in the figure, 1-web, 201-first flange plate, 202-second flange plate, 401-upper end plate, 402-lower end plate, 301-first rectangular steel plate, 302-second rectangular steel plate, 303-third rectangular steel plate, 304-fourth rectangular steel plate, 305-fifth rectangular steel plate, 306-sixth rectangular steel plate, 401-upper end plate, 402-lower end plate, 5-fillet weld.
Detailed Description
The present invention will be further described with reference to specific examples so that those skilled in the art may better understand the present invention, but the present invention is not limited thereto.
Example 1
The damper includes: two end plates, a web plate 1, two flange plates and three pairs of rectangular steel plates; the two end plates are an upper end plate 401 and a lower end plate 402 respectively;
the two flange plates are a first flange plate 201 and a second flange plate 202 respectively;
a web plate 1 is connected between the upper end plate 401 and the lower end plate 402, and the upper end plate 401 is respectively connected with the upper tops of the first flange plate 201 and the second flange plate 202; the lower end plate 402 is connected with the lower bottoms of the first flange plate 201 and the second flange plate 202 respectively;
a first flange plate 201 and a second flange plate 202 are respectively arranged at two ends of a web plate 1, three pairs of rectangular steel plates are arranged at two sides of the web plate 1, and the rectangular steel plates are respectively a first rectangular steel plate 301, a second rectangular steel plate 302, a third rectangular steel plate 303, a fourth rectangular steel plate 304, a fifth rectangular steel plate 305 and a sixth rectangular steel plate 306;
the upper top ends of the first rectangular steel plate 301, the second rectangular steel plate 302, the third rectangular steel plate 303, the fourth rectangular steel plate 304, the fifth rectangular steel plate 305 and the sixth rectangular steel plate 306 are connected with an upper end plate 401; the lower ends of the three pairs of rectangular steel plates are connected to the lower end plate 402.
The three pairs of rectangular steel plates are all made of metal materials with low yield strength and high deformation characteristics. Because the metal plate needs to be bent to do work, the metal plate is made of metal materials with low yield point and strong ductility, the planar shape is rectangular, and the metal plate can be formed by mechanical horizontal cutting of a seamless steel plate with low yield point. The rectangular steel plate, the web plate and the flange end plate ascend. The upper and lower corners of the inside of the rectangular steel plate are cut to form access holes (i.e., upper holes) so that the fillet welds 5 along the top and bottom edges of the web can pass through.
The invention is applied to a civil frame structure with 7-9 layers, the layer height is 3.6-3.9 meters, and the horizontal force borne by the frame is assumed to be P1The bearing capacity of the damper can be obtained from the symmetry in the force method, and is represented by F, and the calculation diagram is shown in fig. 7. Because the damper is arranged at the middle top of the frame and needs to be coordinated with the herringbone support, the required size is limited, the total height H of the damper is designed to be 280mm according to the reference of the heights of the dampers at the top ends of a plurality of beams, and the height H of the web plate, the rectangular steel plate and the flange plate of the damper is designed to be 240 mm. And because the rectangular steel plate needs bending stress, the thickness t of the rectangular steel plate is required according to the construction requirementkThe suggested value range is 8-12 mm, the flange end plate is a constraint web plate, and the thickness t of the flange end platedThe suggested value is about 8-14 mm. End plate with thickness t for connecting frame beam and herringbone support up and downaThe value is 20 mm.
As a further limitation of the technical solution, the main energy consumption parts of the present invention are the web and the rectangular steel plate, but since the web yields before the rectangular steel plate, the thickness t of the web is mainly calculated in this calculationw。
The calculation process is as follows:
the elastic buckling strength of the web is as follows:
Qse＝τEbwtw(1)
in the formula: qse-the elastic buckling strength of the web;
τE-critical yield stress of the web;
bw-web width;
tw-web thickness:
if a thin rectangular plate is used as the web, the elastic buckling strength Q of the webseIs generally greater than the yield strength Q of the webysTo prevent the web from bending before yielding.
In the formula: ks-the buckling coefficient of the web;
e-modulus of elasticity;
λ -slenderness ratio;
v-poisson ratio:
α — aspect ratio:
by
Find out
tw≥1.22mm (5)
The energy consumption of the shear bending damper is mainly divided into three stages:
elastic stiffness of web:
yield strength of web:
elastic stiffness of rectangular steel plate:
yield stiffness of rectangular steel plate:
in the formula: ks-the buckling coefficient of the web;
g-shear modulus of steel;
fyw-yield stress of the web;
n is the number of the rectangular steel plates;
bk-rectangular steel plate width;
fyk-yield stress of rectangular steel plate;
the first stage is as follows: the web and the rectangular steel plate are both in the elastic stage.
Elastic rigidity of damper: k1＝Ks+Kb；
Displacement of the damper:
bearing capacity of the damper:
and a second stage: the web shear component yields and the rectangular steel plate remains elastic.
Elastic rigidity of damper: k2＝Kb
Displacement of the damper:
bearing capacity of the damper:
and a third stage: both the web shear component and the rectangular steel plate yield.
The damper does work and consumes energy, and the force borne by the damper is larger than F in the first stagey1And is smaller than F of the second stagey2Namely:
Fy1≤F≤Fy2(6)
the thickness value range t of the web plate is obtained from the abovew：
The invention relates to a mixed structure form of a shear damper and a bending damper, wherein the internal structure of the damper is as follows: the shear plate and the bending plate are not obviously connected and work independently, so that the damper can dissipate energy better. Patent document CN202731009U "a combined shear type metal damper" relates only to a reinforced structure form of the shear damper, and only the shear plate performs energy dissipation.
From the effect, the invention effectively reduces the harmful effect generated by out-of-plane buckling, so that the shear bending damper has stable hysteretic performance and has the rigidity and the strength of the shear metal damper. The CN202731009U just improves the energy dissipation and shock resistance of the damper, and does not provide a solution for improving the hysteresis performance of the shear damper. The invention aims at the defects in the patent documents, and the proposed technical scheme can enable the shear bending damper to have stable hysteretic performance and keep better rigidity and strength.
The invention relates to the calculation of the load capacity of the damper and the thickness of the shear web:
and (3) calculating the bearing capacity:
shear web thickness calculation:
the damper stress calculation method is convenient and flexible to apply, can calculate the corresponding structure according to the specific stress condition of the damper, can obtain the specific size of the damper, and is convenient to apply.
Claims (9)
1. A novel combined shear bending damper is characterized in that: the damper includes: the structure comprises two end plates, a web plate (1), two flange plates and at least one pair of rectangular steel plates;
the two end plates are respectively an upper end plate (401) and a lower end plate (402);
the two flange plates are respectively a first flange plate (201) and a second flange plate (202);
a web plate (1) is connected between the upper end plate (401) and the lower end plate (402), and the upper end plate (401) is respectively connected with the upper tops of the first flange plate (201) and the second flange plate (202); the lower end plate (402) is respectively connected with the lower bottoms of the first flange plate (201) and the second flange plate (202);
a first flange plate (201) and a second flange plate (202) are respectively arranged at two ends of the web plate (1), and at least one pair of rectangular steel plates are arranged at two sides of the web plate (1);
the upper top ends of all the rectangular steel plates are connected with an upper end plate (401); the lower bottom ends of the three pairs of rectangular steel plates are connected with a lower end plate (402).
2. A novel combination shear bend damper, as defined in claim 1, wherein: the damper includes: the structure comprises two end plates, a web plate (1), two flange plates and three pairs of rectangular steel plates;
the two end plates are respectively an upper end plate (401) and a lower end plate (402);
the two flange plates are respectively a first flange plate (201) and a second flange plate (202);
a web plate (1) is connected between the upper end plate (401) and the lower end plate (402), and the upper end plate (401) is respectively connected with the upper tops of the first flange plate (201) and the second flange plate (202); the lower end plate (402) is respectively connected with the lower bottoms of the first flange plate (201) and the second flange plate (202);
a first flange plate (201) and a second flange plate (202) are respectively arranged at two ends of a web plate (1), three pairs of rectangular steel plates are arranged at two sides of the web plate (1), and the rectangular steel plates are respectively a first rectangular steel plate (301), a second rectangular steel plate (302), a third rectangular steel plate (303), a fourth rectangular steel plate (304), a fifth rectangular steel plate (305) and a sixth rectangular steel plate (306);
the upper top ends of the three pairs of rectangular steel plates are connected with an upper end plate (401); the lower bottom ends of the three pairs of rectangular steel plates are connected with a lower end plate (402).
3. A novel combination shear bend damper, as defined in claim 2, wherein: the damper includes: the spacing between adjacent rectangular steel plates is equal.
4. A novel combination shear bend damper, as defined in claim 2, wherein: each pair of rectangular steel plates are symmetrically distributed on two sides of the web plate (1).
5. A novel combination shear bend damper, as defined in claim 2, wherein: the web (1) is a plate made of a metal material having low yield strength and high deformation characteristics, and the planar shape of the web (1) is rectangular.
6. A novel combination shear bend damper, as defined in claim 2, wherein: the three pairs of rectangular steel plates are steel plates made of metal materials having low yield strength and high deformation characteristics.
7. A novel combination shear bend damper, as defined in claim 2, wherein: the first flange plate (201) and the second flange plate (202) are high-strength steel plates, and the cross sections of the first flange plate (201) and the second flange plate (202) are rectangular.
8. A novel combination shear bend damper, as defined in claim 2, wherein: the first flange end plate (201) and the second flange end plate (202) are equal in height, and the first flange end plate (201) and the second flange end plate (202) are connected with the frame beam and the herringbone support end plate respectively through bolt connection; the total height H of the damper is 260-300 mm, the height H of a web plate (1), a rectangular steel plate and a first flange plate (201) of the damper is 220-260 mm, and the thickness t of the rectangular steel plate (3) iskThe value range is between 8 mm and 12mm, and the thickness t of the first flange plate (201) and the second flange plate (202)dThe value is 8-14 mm; end plate thickness t of frame beam and herringbone supportaThe value is 20mm, and the thickness range t of the web plate (1)w：
9. A novel combination shear bend damper, as defined in claim 2, wherein: the first flange end plate (201) and the second flange end plate (202) are equal in height, and the first flange end plate (201) and the second flange end plate (202) are connected with the frame beam and the herringbone support through bolt connection respectively; the total height H of the damper is 280mm, the height H of a web plate (1), a rectangular steel plate, a first flange end plate (201) and a second flange end plate (202) of the damper is 240mm, and the thickness t of the rectangular steel plate iskThe value range is between 10mm, and the thickness t of the first flange end plate (201) and the second flange end plate (202)dThe value is 12 mm; thickness t of end plate for connecting frame beam and herringbone support up and downaThe thickness of the web is 20mm and the range t of the web thicknessw：
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2019
- 2019-11-22 CN CN201911152404.1A patent/CN110886403A/en active Pending
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Application publication date: 20200317 |