CN114293674B - Connecting beam with SMA friction composite damper and SMA friction composite damper - Google Patents
Connecting beam with SMA friction composite damper and SMA friction composite damper Download PDFInfo
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- CN114293674B CN114293674B CN202210078783.XA CN202210078783A CN114293674B CN 114293674 B CN114293674 B CN 114293674B CN 202210078783 A CN202210078783 A CN 202210078783A CN 114293674 B CN114293674 B CN 114293674B
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Abstract
The invention provides a connecting beam with an SMA friction composite damper and the SMA friction composite damper, wherein the connecting beam comprises a left non-energy-dissipating beam section and a right non-energy-dissipating beam section which are oppositely arranged, and an upper chord member and a lower chord member are hinged between the left non-energy-dissipating beam section and the right non-energy-dissipating beam section; a first SMA friction composite damper is hinged between the inner sides of the left non-energy dissipation beam section and the upper chord, a second SMA friction composite damper is hinged between the inner sides of the upper chord and the right non-energy dissipation beam section, a third SMA friction composite damper is hinged between the inner sides of the right non-energy dissipation beam section and the lower chord, and a fourth SMA friction composite damper is hinged between the inner sides of the lower chord and the left non-energy dissipation beam section. According to the connecting beam with the SMA friction composite damper, the first SMA friction composite damper, the second SMA friction composite damper, the third SMA friction composite damper and the fourth SMA friction composite damper are adopted, so that self-repairing can be realized during an earthquake, namely the energy consumption capacity of the connecting beam is improved, and meanwhile, the residual displacement of the connecting beam after the earthquake is reduced.
Description
Technical Field
The invention belongs to the technical field of earthquake resistance, disaster prevention and disaster reduction of civil engineering structures, relates to a connecting beam with an SMA friction composite damper, and in particular relates to a connecting beam with an SMA friction composite damper and the SMA friction composite damper.
Background
The high-rise building needs to have the capability of recovering the function after earthquake, and the comprehensive use of the low-damage component and the replaceable component is an effective way for improving the capability of recovering the function after earthquake of the high-rise building structure. Shear walls, frames-shear walls or frames-core tubes are used as side force resistant structural systems in high-rise buildings in China. In the structure, the reinforced concrete shear wall has higher bearing capacity and lateral rigidity, is a main lateral force resisting member and shares the main earthquake action. When the requirements of using functions are met or the section of the wall is very long, an opening is formed in the wall, and a connecting beam is arranged above the opening to form the coupled shear wall. The coupling wall jointly resists the overturning moment caused by the lateral force by the wall limb bending moment and the coupling moment generated by the coupling Liang Jianli, and the coupling wall takes the coupling beam as a first defense line when in earthquake-proof design, when an earthquake occurs, the coupling beam is first subjected to yielding, and plastic hinges generated at two ends of the coupling beam dissipate certain earthquake energy, so that the wall limb is protected. The conventional connecting beam has the following problems: the ductility is poor, the energy consumption capability is general, the damage is easy to occur, and the post-earthquake repair is difficult, so that the improvement of the energy consumption performance and the ductility of the connecting beam and the post-earthquake repairability are particularly important.
The existing coupled shear wall with the replaceable coupling beams can concentrate plastic damage on the coupling beams of the replaceable parts, but the replaceable parts have the problems of heavy weight and large residual displacement after earthquake, and are not beneficial to the replacement of damaged components; the replaceable parts and the non-energy dissipation beam sections are generally connected by high-strength bolts, so that the disassembly is inconvenient, and the replacement efficiency and the recovery degree after earthquake are affected. In addition, in the existing self-resetting connecting beam structure, the connecting beam is generally connected with the wall limbs through prestress ribs, energy-consuming components are arranged at the corners of the connecting beam, the damper generates displacement by utilizing the swinging of the connecting beam to dissipate seismic energy, and the connecting beam has an axial extension effect and is unfavorable for the floor slab.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a connecting beam with an SMA friction composite damper and the SMA friction composite damper, and solve the technical problems of low energy consumption capability of the connecting beam and large residual displacement of the connecting beam Liang Zhenhou in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the connecting beam with the SMA friction composite damper comprises a left non-energy-dissipating beam section and a right non-energy-dissipating beam section which are oppositely arranged, wherein an upper chord and a lower chord are hinged between the left non-energy-dissipating beam section and the right non-energy-dissipating beam section, and the upper chord and the lower chord are parallel and opposite and are arranged along the transverse direction;
the inner side of the left non-energy dissipation beam section is hinged with one end of a first SMA friction composite damper, the other end of the first SMA friction composite damper is hinged on the inner side of an upper chord member, the inner side of the upper chord member is also hinged with one end of a second SMA friction composite damper, the other end of the second SMA friction composite damper is hinged on the inner side of the right non-energy dissipation beam section, the inner side of the right non-energy dissipation beam section is also hinged with one end of a third SMA friction composite damper, the other end of the third SMA friction composite damper is hinged on the inner side of a lower chord member, the inner side of the lower chord member is also hinged with one end of a fourth SMA friction composite damper, and the other end of the fourth SMA friction composite damper is hinged on the inner side of the left non-energy dissipation beam section;
the first SMA friction composite damper, the second SMA friction composite damper, the third SMA friction composite damper and the fourth SMA friction composite damper have the same structure;
the first SMA friction composite damper comprises a first friction steel plate hinged on the left non-energy dissipation beam Duan Nace and a second friction steel plate hinged on the inner side of the upper chord; the second friction steel plate is provided with a plurality of strip-shaped bolt holes, high-strength bolts are movably arranged in the strip-shaped bolt holes, and the high-strength bolts are fixedly arranged on the first friction steel plate; the first friction steel plate and the second friction steel plate are connected through the strip-shaped bolt holes and the high-strength bolts, and the first friction steel plate and the second friction steel plate can move relatively;
the first friction steel plate is sleeved with a first end plate close to the outer movable type, and the second friction steel plate is sleeved with a second end plate in an outer movable type; a first square steel pipe and a second square steel pipe are arranged between the first end plate and the second end plate, and are arranged in parallel and opposite to each other;
one end of the first steel pipe is fixed on the first friction steel plate, and the other end of the first steel pipe is close to the second end plate and is not fixed; one end of the second square steel pipe is close to the first end plate and is not fixed, and the other end of the second square steel pipe is fixed on the second friction steel plate;
a first SMA rod is arranged in the first steel pipe, and two ends of the first SMA rod are respectively and fixedly arranged on the first end plate and the second end plate; and a second SMA rod is arranged in the second square steel pipe, and two ends of the second SMA rod are respectively and fixedly arranged on the first end plate and the second end plate.
The invention also has the following technical characteristics:
the first SMA friction composite damper, the second SMA friction composite damper, the third SMA friction composite damper and the fourth SMA friction composite damper are arranged in a two-to-two mode, the first SMA friction composite damper and the third SMA friction composite damper are parallel to each other, and the second SMA friction composite damper and the fourth SMA friction composite damper are parallel to each other.
A first hinge is arranged in the middle of the left non-energy dissipation beam Duan Nace; the middle position of the inner side of the upper chord member is provided with a second hinging piece and a third hinging piece in sequence from left to right; a fourth hinge is arranged in the middle of the right non-energy dissipation beam Duan Nace; the middle position of the inner side of the lower chord member is provided with a fifth hinging piece and a sixth hinging piece in sequence from left to right.
The two ends of the first SMA friction composite damper are respectively provided with a first lug plate and a second lug plate; the two ends of the second SMA friction composite damper are respectively provided with a third lug plate and a fourth lug plate; the two ends of the third SMA friction composite damper are respectively provided with a fifth lug plate and a sixth lug plate; the seventh lug plate and the eighth lug plate are respectively arranged at the two ends of the fourth SMA friction composite damper;
the first lug plate is hinged in the upper half part of the first hinge piece, the second lug plate is hinged in the second hinge piece, the third lug plate is hinged in the third hinge piece, the fourth lug plate is hinged in the upper half part of the fourth hinge piece, the fifth lug plate is hinged in the lower half part of the fourth hinge piece, the sixth lug plate is hinged in the sixth hinge piece, the seventh lug plate is hinged in the fifth hinge piece, and the eighth lug plate is hinged in the lower half part of the first hinge piece.
The top of the left non-energy dissipation beam Duan Nace is provided with a first connecting end, and the bottom of the left non-energy dissipation beam Duan Nace is provided with a second connecting end; the top of the right non-energy dissipation beam Duan Nace is provided with a third connecting end, and the bottom of the right non-energy dissipation beam Duan Nace is provided with a fourth connecting end; the first connecting end, the second connecting end, the third connecting end and the fourth connecting end are arranged in a pairwise manner and have the same structure.
The two transverse ends of the upper chord member are respectively provided with a first connecting piece and a second connecting piece; the transverse two ends of the lower chord member are respectively provided with a third connecting piece and a fourth connecting piece; the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are identical in structure;
the first connecting piece is hinged in the first connecting end, the second connecting piece is hinged in the third connecting end, the third connecting piece is hinged in the second connecting end, and the fourth connecting piece is hinged in the fourth connecting end.
The first connecting end head comprises a pair of transverse stiffening ribs fixed on the left non-energy dissipation beam Duan Nace, a pair of vertical stiffening ribs are arranged between the pair of transverse stiffening ribs, and the vertical stiffening ribs are oppositely arranged in parallel; and the vertical stiffening ribs are provided with energy dissipation beam section mounting holes.
The invention also provides the SMA friction composite damper.
Compared with the prior art, the invention has the following technical effects:
the connecting beam with the SMA friction composite damper adopts the first SMA friction composite damper, the second SMA friction composite damper, the third SMA friction composite damper and the fourth SMA friction composite damper, so that self-repairing can be realized during an earthquake, namely the energy consumption capacity of the connecting beam is improved, and residual displacement of the connecting beam after the earthquake is reduced.
In the connecting beam with the SMA friction composite damper, the upper chord member, the lower chord member, the left non-energy-dissipation beam section and the right non-energy-dissipation beam Duan Jiaojie can deform energy-dissipation components, so that the axial extension effect generated by the swinging of the connecting beam in the connecting beam is eliminated.
In the connecting beam with the SMA friction composite damper, the first SMA friction composite damper, the second SMA friction composite damper, the third SMA friction composite damper and the fourth SMA friction composite damper are arranged in the four corners of a diamond, so that the size of the damper is reduced, the weight is reduced, further later disassembly is facilitated, the repair time is shortened, and the economy is improved.
And (IV) the connecting beam with the SMA friction composite damper can be prefabricated in a factory, is convenient to install, and is convenient to install and detach after earthquake, and the connecting mode of the SMA friction composite damper and the upper chord and the lower chord is hinged. The connecting beam is used in a high-rise shear wall structure, can improve the post-earthquake recovery capacity of the shear wall structure, enhances the toughness of the shear wall, and has wide application prospect.
Drawings
FIG. 1 is a schematic overall structure of a tie beam with an SMA friction composite damper.
Fig. 2 is a schematic structural view of an SMA friction composite damper.
FIG. 3 is a cross-sectional view of A-A of a tie beam with an SMA friction composite damper.
Fig. 4 is a front view of the upper chord.
Fig. 5 is a front view of the first connection terminal.
Fig. 6 is a side view of the first connector tip.
FIG. 7A is a schematic illustration of an SMA friction composite damper in an unstressed state.
Fig. 7B is a schematic illustration of an SMA friction composite damper in tension.
Fig. 7C is a schematic view of the SMA friction composite damper in a compressed state.
FIG. 8 is a force-bearing deformation schematic of a tie beam with an SMA friction composite damper.
The meaning of each reference numeral in the figures is: 1-left non-energy dissipating beam section, 2-right non-energy dissipating beam section, 3-upper chord, 4-lower chord, 5-first SMA friction composite damper, 6-second SMA friction composite damper, 7-third SMA friction composite damper, 8-fourth SMA friction composite damper, 9-first articulation, 10-second articulation, 11-third articulation, 12-fourth articulation, 13-fifth articulation, 14-sixth articulation, 15-first ear plate, 16-second ear plate, 17-third ear plate, 18-fourth ear plate, 19-fifth ear plate, 20-sixth ear plate, 21-seventh ear plate, 22-eighth ear plate, 23-first connection end, 24-second connection end, 25-third connection end, 26-fourth connection end, 27-first connection end, 28-second connection end, 29-third connection end, 30-fourth connection end;
501-a first friction steel plate, 502-a second friction steel plate, 503-an elongated bolt hole, 504-a high-strength bolt, 505-a first end plate, 506-a second end plate, 507-a first square steel pipe, 508-a second square steel pipe, 509-a first SMA rod, 510-a second SMA rod;
2301-transverse stiffening ribs, 2302-vertical stiffening ribs, 2303-energy dissipating beam section mounting holes.
The following examples illustrate the invention in further detail.
Detailed Description
The shape memory alloy, SMA, is one new type of alloy material with excellent shape memory effect, super elasticity, high damping, corrosion resistance, biocompatibility, etc. The invention provides a connecting beam with an SMA friction composite damper, wherein an SMA rod of the SMA friction composite damper and the friction damper work cooperatively, so that the energy consumption capability of the connecting beam can be increased and the residual displacement of the connecting beam can be reduced.
All parts in the present invention are known in the art, unless otherwise specified.
SMA refers to a shape memory alloy.
The following specific embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention.
Example 1:
the embodiment discloses an SMA friction composite damper, which comprises a first friction steel plate 501 and a second friction steel plate 502 as shown in FIG. 2; a plurality of long-strip-shaped bolt holes 503 are formed in the second friction steel plate 502, high-strength bolts 504 are movably arranged in the long-strip-shaped bolt holes 503, and the high-strength bolts 504 are fixedly arranged on the first friction steel plate 501; the first friction steel plate 501 and the second friction steel plate 502 are connected through the long-strip-shaped bolt holes 503 and the high-strength bolts 504, and the first friction steel plate 501 and the second friction steel plate 502 can move relatively;
the first friction steel plate 501 is sleeved with a first end plate 505 near the outer movable mode, and the second friction steel plate 502 is sleeved with a second end plate 506 at the outer movable mode; a first steel pipe 507 and a second steel pipe 508 are arranged between the first end plate 505 and the second end plate 506, and the first steel pipe 507 and the second steel pipe 508 are arranged in parallel and opposite;
one end of the first steel pipe 507 is fixed to the first friction steel plate 501, and the other end is adjacent to the second end plate 506 and is not fixed; one end of the second square steel pipe 508 is close to the first end plate 505 and is not fixed, and the other end is fixed on the second friction steel plate 502;
a first SMA rod 509 is disposed in the first steel pipe 507, and two ends of the first SMA rod 509 are respectively fixedly mounted on the first end plate 505 and the second end plate 506; a second SMA rod 510 is disposed in the second square steel tube 508, and two ends of the second SMA rod 510 are fixedly mounted on the first end plate 505 and the second end plate 506, respectively.
Example 2:
the embodiment discloses a connecting beam with an SMA friction composite damper, wherein the connecting beam adopts the SMA friction composite damper in the embodiment 1, and comprises a left non-energy-dissipating beam section 1 and a right non-energy-dissipating beam section 2 which are oppositely arranged, an upper chord 3 and a lower chord 4 are hinged between the left non-energy-dissipating beam section 1 and the right non-energy-dissipating beam section 2, and the upper chord 3 and the lower chord 4 are parallel and opposite and are arranged along the transverse direction;
the inner side of the left non-energy dissipation beam section 1 is hinged with one end of a first SMA friction composite damper 5, the other end of the first SMA friction composite damper 5 is hinged on the inner side of the upper chord 3, one end of a second SMA friction composite damper 6 is hinged on the inner side of the upper chord 3, the other end of the second SMA friction composite damper 6 is hinged on the inner side of the right non-energy dissipation beam section 2, the inner side of the right non-energy dissipation beam section 2 is hinged with one end of a third SMA friction composite damper 7, the other end of the third SMA friction composite damper 7 is hinged on the inner side of the lower chord 4, the inner side of the lower chord 4 is hinged with one end of a fourth SMA friction composite damper 8, and the other end of the fourth SMA friction composite damper 8 is hinged on the inner side of the left non-energy dissipation beam section 1;
the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8 have the same structure;
the first SMA friction composite damper 5 comprises a first friction steel plate 501 hinged on the inner side of the left non-energy dissipating beam section 1, and a second friction steel plate 502 hinged on the inner side of the upper chord 3; a plurality of long-strip-shaped bolt holes 503 are formed in the second friction steel plate 502, high-strength bolts 504 are movably arranged in the long-strip-shaped bolt holes 503, and the high-strength bolts 504 are fixedly arranged on the first friction steel plate 501; the first friction steel plate 501 and the second friction steel plate 502 are connected through the long-strip-shaped bolt holes 503 and the high-strength bolts 504, and the first friction steel plate 501 and the second friction steel plate 502 can move relatively;
the first friction steel plate 501 is sleeved with a first end plate 505 near the outer movable mode, and the second friction steel plate 502 is sleeved with a second end plate 506 at the outer movable mode; a first steel pipe 507 and a second steel pipe 508 are arranged between the first end plate 505 and the second end plate 506, and the first steel pipe 507 and the second steel pipe 508 are arranged in parallel and opposite;
one end of the first steel pipe 507 is fixed to the first friction steel plate 501, and the other end of the first steel pipe 507 is adjacent to the second end plate 506 and is not fixed; one end of the second square steel pipe 508 is close to the first end plate 505 and is not fixed, and the other end of the second square steel pipe 508 is fixed on the second friction steel plate 502;
a first SMA rod 509 is disposed in the first steel pipe 507, and two ends of the first SMA rod 509 are respectively fixedly mounted on the first end plate 505 and the second end plate 506; a second SMA rod 510 is disposed in the second square steel tube 508, and two ends of the second SMA rod 510 are fixedly mounted on the first end plate 505 and the second end plate 506, respectively.
In this embodiment, one end of the first steel pipe 507 is welded to the first friction steel plate 501, and the other end is freely movable; one end of the second square steel pipe 508 is welded to the second friction steel plate 502, and the other end is movable. Square holes are formed in the centers of the first end plate 505 and the second end plate 506, and the square holes can freely slide on the first steel pipe 507 and the second steel pipe 508.
In this embodiment, high-strength bolts 504 provide normal pressure to create friction at the interface. During seismic action, energy generated is consumed by friction generated between the first friction steel plate 501 and the second friction steel plate 502. The first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8 are used as web members of the energy dissipation connecting beam to enter a plastic state, so that energy consumption and damage are only concentrated on the four SMA friction composite dampers. The four SMA friction composite dampers are hinged with the upper chord 3 and the lower chord 4 to realize quick restoration after earthquake.
In this embodiment, parameters such as the steel plate sizes and the steel strengths of the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8, the length of the elongated bolt holes 503, the pretightening force of the high-strength bolts 504, and the like can be changed according to specific design requirements, so as to achieve an optimal effect.
In this embodiment, the number of elongated bolt holes 503 is three.
In the present embodiment, the energy consumption of the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7, and the fourth SMA friction composite damper 8 is not limited to the friction between the first friction steel plate 501 and the second friction steel plate 502; other gaskets such as brass sheets which can increase friction force can be added between the first friction steel plate 501 and the second friction steel plate 502.
In this embodiment, the bearing capacity of the left non-energy-dissipating beam section 1 and the right non-energy-dissipating beam section 2 is greater than the bearing capacity provided by the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8, so as to ensure that the left non-energy-dissipating beam section 1 and the right non-energy-dissipating beam section 2 maintain elasticity.
As a specific scheme of this embodiment, the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7, and the fourth SMA friction composite damper 8 are disposed two by two, the first SMA friction composite damper 5 and the third SMA friction composite damper 7 are parallel to each other, and the second SMA friction composite damper 6 and the fourth SMA friction composite damper 8 are parallel to each other.
In this embodiment, the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8 are arranged in diamond four corners, so that the size of the damper can be reduced, the weight of the damper is reduced, the later disassembly is convenient, and the repair time and cost are reduced.
As a specific scheme of the embodiment, a first hinge 9 is arranged at the middle position of the inner side of the left non-energy-dissipating beam section 1; the middle position of the inner side of the upper chord member 3 is provided with a second hinging piece 10 and a third hinging piece 11 in sequence from left to right; a fourth hinge 12 is arranged in the middle of the inner side of the right non-energy dissipation beam section 2; the fifth hinge 13 and the sixth hinge 14 are provided in this order from left to right in the middle of the inner side of the lower chord 4.
As a specific scheme of the embodiment, two ends of the first SMA friction composite damper 5 are respectively provided with a first ear plate 15 and a second ear plate 16; the two ends of the second SMA friction composite damper 6 are respectively provided with a third lug plate 17 and a fourth lug plate 18; the two ends of the third SMA friction composite damper 7 are respectively provided with a fifth lug plate 19 and a sixth lug plate 20; the seventh lug plate 21 and the eighth lug plate 22 are respectively arranged at the two ends of the fourth SMA friction composite damper 8;
the first ear panel 15 is hinged in the upper half of the first hinge 9, the second ear panel 16 is hinged in the second hinge 10, the third ear panel 17 is hinged in the third hinge 11, the fourth ear panel 18 is hinged in the upper half of the fourth hinge 12, the fifth ear panel 19 is hinged in the lower half of the fourth hinge 12, the sixth ear panel 20 is hinged in the sixth hinge 14, the seventh ear panel 21 is hinged in the fifth hinge 13, and the eighth ear panel 22 is in the lower half of the first hinge 9.
In this embodiment, the dimensions of the first hinge 9, the second hinge 10, the third hinge 11, the fourth hinge 12, the fifth hinge 13 and the sixth hinge 14 are required to ensure that the cross section of the four-corner-arrangement connecting beam always maintains elasticity when the four-corner-arrangement connecting beam is in normal operation.
As a specific scheme of the embodiment, a first connecting end head 23 is arranged at the top of the inner side of the left non-energy-dissipating beam section 1, and a second connecting end head 24 is arranged at the bottom of the inner side of the left non-energy-dissipating beam section 1; the top of the inner side of the right non-energy dissipation beam section 2 is provided with a third connecting end 25, and the bottom of the inner side of the right non-energy dissipation beam section 2 is provided with a fourth connecting end 26; the first connecting end 23, the second connecting end 24, the third connecting end 25 and the fourth connecting end 26 are arranged in pairs and have the same structure.
As a specific scheme of the embodiment, the transverse two ends of the upper chord 3 are respectively provided with a first connecting piece 27 and a second connecting piece 28; the third connecting piece 29 and the fourth connecting piece 30 are respectively arranged at the two transverse ends of the lower chord 4; the first connecting piece 27, the second connecting piece 28, the third connecting piece 29 and the fourth connecting piece 30 are identical in structure;
the first connector 27 is hinged in the first connector end 23, the second connector 28 is hinged in the third connector end 25, the third connector 29 is hinged in the second connector end 24, and the fourth connector 30 is hinged in the fourth connector end 26.
As a specific scheme of the embodiment, the first connecting end 23 comprises a pair of transverse stiffening ribs 2301 fixed on the inner side of the left non-energy dissipating beam section 1, a pair of vertical stiffening ribs 2302 are arranged between the pair of transverse stiffening ribs 2301, and the vertical stiffening ribs 2302 are oppositely arranged in parallel; the vertical stiffening ribs 2302 are provided with energy dissipating beam section mounting holes 2303.
In this embodiment, the dimensions of the first connecting end 23, the second connecting end 24, the third connecting end 25 and the fourth connecting end 26 are required to ensure that the cross sections thereof remain in an elastic state all the time, so as to connect the chord and the non-energy dissipating beam section.
The connecting beam with the SMA friction composite damper has the following working principle:
the energy dissipation and self-repairing of the connecting beam mainly depend on the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7 and the fourth SMA friction composite damper 8. The energy dissipation components of the SMA friction composite damper are a first friction steel plate 501 and a second friction steel plate 502; the self-resetting components of the SMA friction composite damper are a first square steel tube 507, a second square steel tube 508, a first SMA rod 509 and a second SMA rod 510.
When the SMA friction composite damper is pulled, one end of the first steel pipe 507 moves along with the first friction steel plate 501, and simultaneously pushes the first end plate 505 to move; the other end of the second square steel pipe 508 moves following the second friction steel plate 502 while pushing the second end plate 506 to move, so that the distance between the first end plate 505 and the second end plate 506 is elongated, and further the first SMA rod 509 and the second SMA rod 510 are elongated.
When the SMA friction composite damper is pressed, one end of the first steel pipe 507 moves along with the first friction steel plate 501, and pushes the second end plate 506 to move; the other end of the second square steel pipe 508 moves following the second friction steel plate 502 while pushing the first end plate 505 to move, so that the distance between the first end plate 505 and the second end plate 506 is elongated, and further the first SMA rod 509 and the second SMA rod 510 are elongated.
Therefore, the first SMA rod 509 and the second SMA rod 510 are both in an extended state, i.e., the first SMA rod 509 and the second SMA rod 510 are capable of continuously generating a restoring force, regardless of whether the SMA friction composite damper is in a tensioned or compressed state, reducing residual displacement of the SMA friction composite damper.
As shown in fig. 8, when an earthquake occurs, the left non-energy dissipating beam section 1, the right non-energy dissipating beam section 2, the upper chord 3, the lower chord 4, the first hinge 9, the second hinge 10, the third hinge 11, the fourth hinge 12, the fifth hinge 13, and the sixth hinge 14 all maintain an elastic state, and the first SMA friction composite damper 5, the second SMA friction composite damper 6, the third SMA friction composite damper 7, and the fourth SMA friction composite damper 8 all enter a plastic state.
The connecting beam deforms under the action of an earthquake, the first SMA friction composite damper 5 and the third SMA friction composite damper 7 are stretched, the second SMA friction composite damper 6 and the fourth SMA friction composite damper 8 are compressed and shortened, energy generated by friction force consumption generated between the first friction steel plate 501 and the second friction steel plate 502 is consumed, normal pressure is provided by the high-strength bolts 504 to generate friction force on the contact surface, the first SMA rod 509 and the second SMA rod 510 can continuously generate restoring force, and residual displacement of the SMA friction composite dampers is reduced.
Claims (7)
1. The connecting beam with the SMA friction composite damper comprises a left non-energy-dissipating beam section (1) and a right non-energy-dissipating beam section (2) which are oppositely arranged, and is characterized in that an upper chord member (3) and a lower chord member (4) are hinged between the left non-energy-dissipating beam section (1) and the right non-energy-dissipating beam section (2), and the upper chord member (3) and the lower chord member (4) are parallel and opposite and are arranged along the transverse direction;
one end of a first SMA friction composite damper (5) is hinged to the inner side of the left non-energy dissipation beam section (1), the other end of the first SMA friction composite damper (5) is hinged to the inner side of the upper chord member (3), one end of a second SMA friction composite damper (6) is hinged to the inner side of the upper chord member (3), the other end of the second SMA friction composite damper (6) is hinged to the inner side of the right non-energy dissipation beam section (2), one end of a third SMA friction composite damper (7) is hinged to the inner side of the right non-energy dissipation beam section (2), the other end of the third SMA friction composite damper (7) is hinged to the inner side of the lower chord member (4), one end of a fourth SMA friction composite damper (8) is hinged to the inner side of the lower chord member (4), and the other end of the fourth SMA friction composite damper (8) is hinged to the inner side of the left non-energy dissipation beam section (1);
the first SMA friction composite damper (5), the second SMA friction composite damper (6), the third SMA friction composite damper (7) and the fourth SMA friction composite damper (8) have the same structure;
the first SMA friction composite damper (5) comprises a first friction steel plate (501) hinged on the inner side of the left non-energy-dissipating beam section (1) and a second friction steel plate (502) hinged on the inner side of the upper chord (3); a plurality of strip-shaped bolt holes (503) are formed in the second friction steel plate (502), high-strength bolts (504) are movably arranged in the strip-shaped bolt holes (503), and the high-strength bolts (504) are fixedly arranged on the first friction steel plate (501); the first friction steel plate (501) and the second friction steel plate (502) are connected through the long-strip-shaped bolt hole (503) and the high-strength bolt (504), and the first friction steel plate (501) and the second friction steel plate (502) can move relatively;
the first friction steel plate (501) is close to the outer movable sleeve and is provided with a first end plate (505), and the second friction steel plate (502) is externally and movably sleeved with a second end plate (506); a first steel pipe (507) and a second steel pipe (508) are arranged between the first end plate (505) and the second end plate (506), and the first steel pipe (507) and the second steel pipe (508) are arranged in parallel and opposite;
one end of the first steel pipe (507) is fixed on the first friction steel plate (501), and the other end of the first steel pipe (507) is close to the second end plate (506) and is not fixed; one end of the second square steel pipe (508) is close to the first end plate (505) and is not fixed, and the other end of the second square steel pipe (508) is fixed on the second friction steel plate (502);
a first SMA rod (509) is arranged in the first steel pipe (507), and two ends of the first SMA rod (509) are fixedly arranged on the first end plate (505) and the second end plate (506) respectively; a second SMA rod (510) is arranged in the second square steel pipe (508), and two ends of the second SMA rod (510) are respectively and fixedly arranged on the first end plate (505) and the second end plate (506);
the first SMA friction composite damper (5), the second SMA friction composite damper (6), the third SMA friction composite damper (7) and the fourth SMA friction composite damper (8) are arranged in a pairwise manner, the first SMA friction composite damper (5) and the third SMA friction composite damper (7) are parallel to each other, and the second SMA friction composite damper (6) and the fourth SMA friction composite damper (8) are parallel to each other.
2. Connecting beam with SMA friction composite damper according to claim 1, characterized in that the middle position inside the left non-energy dissipating beam section (1) is provided with a first hinge (9); the middle position of the inner side of the upper chord member (3) is provided with a second hinging piece (10) and a third hinging piece (11) in sequence from left to right; a fourth hinge (12) is arranged in the middle of the inner side of the right non-energy dissipation beam section (2); the middle position of the inner side of the lower chord member (4) is provided with a fifth hinging piece (13) and a sixth hinging piece (14) in sequence from left to right.
3. The connecting beam with the SMA friction composite damper according to claim 2, wherein the two ends of the first SMA friction composite damper (5) are respectively provided with a first lug plate (15) and a second lug plate (16); both ends of the second SMA friction composite damper (6) are respectively provided with a third lug plate (17) and a fourth lug plate (18); both ends of the third SMA friction composite damper (7) are respectively provided with a fifth lug plate (19) and a sixth lug plate (20); a seventh lug plate (21) and an eighth lug plate (22) are respectively arranged at two ends of the fourth SMA friction composite damper (8);
the first ear plate (15) is hinged in the upper half part of the first hinge (9), the second ear plate (16) is hinged in the second hinge (10), the third ear plate (17) is hinged in the third hinge (11), the fourth ear plate (18) is hinged in the upper half part of the fourth hinge (12), the fifth ear plate (19) is hinged in the lower half part of the fourth hinge (12), the sixth ear plate (20) is hinged in the sixth hinge (14), the seventh ear plate (21) is hinged in the fifth hinge (13), and the eighth ear plate (22) is hinged in the lower half part of the first hinge (9).
4. The connecting beam with the SMA friction composite damper according to claim 1, wherein a first connecting end head (23) is arranged at the top of the inner side of the left non-energy-dissipating beam section (1), and a second connecting end head (24) is arranged at the bottom of the inner side of the left non-energy-dissipating beam section (1); the top of the inner side of the right non-energy-dissipation beam section (2) is provided with a third connecting end (25), and the bottom of the inner side of the right non-energy-dissipation beam section (2) is provided with a fourth connecting end (26); the first connecting end (23), the second connecting end (24), the third connecting end (25) and the fourth connecting end (26) are arranged in a pairwise opposite mode and are identical in structure.
5. The connecting beam with the SMA friction composite damper according to claim 4, wherein a first connecting piece (27) and a second connecting piece (28) are respectively arranged at the two transverse ends of the upper chord member (3); the two transverse ends of the lower chord member (4) are respectively provided with a third connecting piece (29) and a fourth connecting piece (30); the first connecting piece (27), the second connecting piece (28), the third connecting piece (29) and the fourth connecting piece (30) are identical in structure;
the first connecting piece (27) is hinged in the first connecting end (23), the second connecting piece (28) is hinged in the third connecting end (25), the third connecting piece (29) is hinged in the second connecting end (24), and the fourth connecting piece (30) is hinged in the fourth connecting end (26).
6. The tie beam with SMA friction composite damper according to claim 4, wherein the first connecting end (23) comprises a pair of transverse stiffeners (2301) fixed on the inside of the left non-energy dissipating beam section (1), a pair of vertical stiffeners (2302) being provided between the pair of transverse stiffeners (2301), the vertical stiffeners (2302) being arranged in parallel opposition; and the vertical stiffening ribs (2302) are provided with energy dissipation beam section mounting holes (2303).
7. SMA friction composite damper applied to the bridge with SMA friction composite damper according to any one of claims 1 to 6, characterized by comprising a first friction steel plate (501) and a second friction steel plate (502); a plurality of strip-shaped bolt holes (503) are formed in the second friction steel plate (502), high-strength bolts (504) are movably arranged in the strip-shaped bolt holes (503), and the high-strength bolts (504) are fixedly arranged on the first friction steel plate (501); the first friction steel plate (501) and the second friction steel plate (502) are connected through the long-strip-shaped bolt hole (503) and the high-strength bolt (504), and the first friction steel plate (501) and the second friction steel plate (502) can move relatively;
the first friction steel plate (501) is close to the outer movable sleeve and is provided with a first end plate (505), and the second friction steel plate (502) is externally and movably sleeved with a second end plate (506); a first steel pipe (507) and a second steel pipe (508) are arranged between the first end plate (505) and the second end plate (506), and the first steel pipe (507) and the second steel pipe (508) are arranged in parallel and opposite;
one end of the first steel pipe (507) is fixed on the first friction steel plate (501), and the other end of the first steel pipe is close to the second end plate (506) and is not fixed; one end of the second square steel pipe (508) is close to the first end plate (505) and is not fixed, and the other end of the second square steel pipe is fixed on the second friction steel plate (502);
a first SMA rod (509) is arranged in the first steel pipe (507), and two ends of the first SMA rod (509) are fixedly arranged on the first end plate (505) and the second end plate (506) respectively; a second SMA rod (510) is arranged in the second square steel pipe (508), and two ends of the second SMA rod (510) are respectively and fixedly arranged on the first end plate (505) and the second end plate (506).
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| CN113175117A (en) * | 2021-05-11 | 2021-07-27 | 四川大学 | Truss type replaceable energy dissipation connecting beam with buckling restrained brace |
| CN115162509B (en) * | 2022-08-04 | 2024-01-26 | 江西瓯麦科技有限公司 | Diamond grid support heavy lateral force resistant support frame |
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| CN107237417A (en) * | 2017-06-16 | 2017-10-10 | 哈尔滨工业大学深圳研究生院 | The embedded power consumption module and damper and coupling beam consumed energy for coupled shear walls |
| CN108457515A (en) * | 2018-05-21 | 2018-08-28 | 黄淮学院 | A kind of three sliding block all reset type SMA frcition dampers |
| CN110206225A (en) * | 2019-06-20 | 2019-09-06 | 大连理工大学 | The shearing steel truss coupling beam of fast quick-recovery after a kind of shake with frcition damper |
| CN212176155U (en) * | 2019-12-26 | 2020-12-18 | 郑州大学 | Composite coupling beam damper |
| WO2020252836A1 (en) * | 2019-06-20 | 2020-12-24 | 大连理工大学 | Post-earthquake rapid recovery bended steel truss connecting beam having friction dampers |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237417A (en) * | 2017-06-16 | 2017-10-10 | 哈尔滨工业大学深圳研究生院 | The embedded power consumption module and damper and coupling beam consumed energy for coupled shear walls |
| CN108457515A (en) * | 2018-05-21 | 2018-08-28 | 黄淮学院 | A kind of three sliding block all reset type SMA frcition dampers |
| CN110206225A (en) * | 2019-06-20 | 2019-09-06 | 大连理工大学 | The shearing steel truss coupling beam of fast quick-recovery after a kind of shake with frcition damper |
| WO2020252836A1 (en) * | 2019-06-20 | 2020-12-24 | 大连理工大学 | Post-earthquake rapid recovery bended steel truss connecting beam having friction dampers |
| CN212176155U (en) * | 2019-12-26 | 2020-12-18 | 郑州大学 | Composite coupling beam damper |
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