CN108643667B - Assembled composite energy-consuming steel beam-column structure capable of multistage vibration reduction and secondary displacement amplification - Google Patents
Assembled composite energy-consuming steel beam-column structure capable of multistage vibration reduction and secondary displacement amplification Download PDFInfo
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- CN108643667B CN108643667B CN201810248259.6A CN201810248259A CN108643667B CN 108643667 B CN108643667 B CN 108643667B CN 201810248259 A CN201810248259 A CN 201810248259A CN 108643667 B CN108643667 B CN 108643667B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 126
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- 239000000463 material Substances 0.000 claims description 15
- 238000010008 shearing Methods 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 11
- 239000011229 interlayer Substances 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 238000011549 displacement method Methods 0.000 claims description 2
- 239000003190 viscoelastic substance Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
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- 229910052751 metal Inorganic materials 0.000 description 3
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- 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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- 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
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Abstract
The invention discloses an assembly type composite energy-consuming steel beam column structure capable of realizing multistage vibration reduction and secondary displacement amplification, which comprises: the energy-saving device comprises an assembled steel beam, an assembled steel column, an energy-consuming wall, a notch, a door and window opening, an upper connecting plate, a lower connecting plate, a vertical movable displacement support, a displacement amplification rod, an L-shaped fixed support, a U-shaped sliding rod, an ear plate, a gear rotating shaft, a pin bolt, a front cover plate, a rear cover plate, a fan-shaped notch, a column-shaped bearing block, a limiting rotating plate, an annular groove, a shear key, a shear block, an outer circular ring, low-yield-point steel and an inner limiting ring. The composite energy consumption device in the assembly type composite energy consumption steel beam column structure realizes multi-stage control energy consumption through the shear deformation of the shear block and the yield energy consumption of the low-yield-point steel, and the energy consumption mechanism is clear, so that the effects of each energy consumption part in different stages are fully exerted. And the horizontal displacement between structural layers is secondarily amplified, so that the energy consumption efficiency is improved, the damage and the damage of a steel structure main body can be effectively reduced, and the steel structure main body is easy to replace after the earthquake or the damage.
Description
Technical Field
The invention relates to an assembly type composite energy-consumption steel beam column structure capable of realizing multistage vibration reduction and secondary displacement amplification, and belongs to the technical field of vibration reduction control and assembly type structures of structural engineering.
Background
In recent years, with the improvement of science and technology and the rapid development of economy and the further enhancement of comprehensive national force, steel structure buildings in developed areas of various economy emerge in large numbers. Because the steel structure has the advantages of light weight, diversified structural forms, wide application range, high construction efficiency, environmental protection and the like, the multi-story and high-rise steel structure is rapidly developed, and the problems of scarcity of land for building, environmental protection and the like are solved. Meanwhile, new problems are brought to engineers and scientific researchers in the civil engineering field, and due to the frequent occurrence of earthquakes in recent years, people pay more and more attention to the earthquake-resistant performance of buildings and gradually improve the requirement on the earthquake-resistant design level of multi-story and high-rise steel structures.
The traditional steel structure is resistant to earthquake action by enhancing the earthquake resistance (strength, rigidity and ductility) of the structure, namely earthquake energy is stored and consumed by the structure, and as the earthquake response of the structure is increased along with the increase of the rigidity of the structure, the structure probably cannot meet the requirement of safety, so that serious damage or collapse is generated, and serious economic loss and casualties are caused. In order to overcome the defects of the conventional steel structure in seismic resistance, researchers generally adopt a steel frame-supporting structure system, a steel frame-shear wall structure system, a staggered truss structure system and an energy-dissipation and shock-absorption steel structure system, and the four structural systems have the defects in seismic resistance. People prefer to mount an energy consumption device on a structure for damping efficiency, the existing energy consumption components have defects, the viscous damper has good energy consumption effect, but the lateral stiffness provided for the structure is very low; the metal damper can provide great lateral stiffness for the structure, but often can not fully consume energy under the earthquake or wind vibration of meeting more, and the shock attenuation effect is poor, and the multistage energy consumption damping can not fully be realized to the existing damper promptly. And energy consumption device generally arranges between the layer that has great relative displacement, but the displacement between the layer is less will restrict the full play of energy consumption device performance to a certain extent, researcher also adopts different connected mode to improve the shock attenuation effect of power consumption part to the structure through enlargiing horizontal displacement between the layer, commonly used have diagonal connection, horizontal connection, elbow type connection and scissors type connected mode, above connected mode has certainly improved the shock attenuation effect through enlargiing horizontal displacement between the layer, but connected mode is complicated, the shock attenuation effect improves limitedly, and occupation space is big, it has certain limitation to arrange the position, to building usage space and building pleasing to the eye certain influence that has led to the fact.
At present, the damage and collapse of a multi-story and high-rise steel structure under the action of a strong earthquake are caused by overlarge interlayer displacement, and the interlayer horizontal displacement is reduced after a damper is installed, so that the energy consumption efficiency of the damper is reduced, a wall body is seriously damaged, and the energy consumption capability is poor and the displacement after the earthquake is not easy. The problem needs to be solved urgently, interlayer displacement of a multi-high steel structure is directly controlled, the overall energy consumption capacity of the steel structure is improved, energy can be consumed efficiently, and therefore the earthquake response of the multi-high steel structure can be obviously reduced. The multi-story high-rise steel structure interlayer displacement control device not only requires high energy consumption efficiency, but also needs small occupied space and does not affect the opening, the door and the window and the use space of the structure; aiming at the problems of low energy consumption capability of multiple high layers, easy damage and difficult replacement of the wall body and the like, the energy consumption device is required to be capable of fully consuming energy under wind vibration, frequent earthquake and rare earthquake, and simultaneously provide larger lateral stiffness, the energy consumption efficiency is improved to a great extent by amplifying horizontal displacement between layers, the wall body also has certain energy consumption capability, and the two are easy to replace after strong earthquake.
Through the analysis, the invention provides an assembly type composite energy-consumption steel beam column structure capable of realizing multistage vibration reduction and secondary displacement amplification, wherein a composite energy-consumption device in the assembly type composite energy-consumption steel beam column structure is fixedly connected with a lower connecting plate, the composite energy-consumption device is connected with a U-shaped sliding rod through a gear, the upper part of a displacement amplification rod is connected with a vertical type movable displacement support through an ear plate, the middle upper part of the displacement amplification rod is connected with an L-shaped fixed support through the ear plate, the lower part of the displacement amplification rod is connected with the U-shaped sliding rod through the ear plate, the other end of the vertical type movable displacement support is fixedly connected with an upper connecting plate, energy-consumption wall bodies are distributed on two sides of the composite energy-consumption device and fixedly connected. The assembled composite energy-consumption steel beam column structure can be prefabricated and rapidly assembled on site, the displacement amplifying rod in the assembled composite energy-consumption steel beam column structure amplifies horizontal displacement between layers to 2-4 times under wind vibration or multiple earthquakes, shearing energy consumption of lead blocks in the composite energy-consumption device is more sufficient, energy-consumption efficiency is higher, and lateral stiffness is provided for the structure through a limiting function; under rare meets of earthquake, the limiting function in the composite energy consumption device can limit the shearing energy consumption of the lead block, so that the low-yield-point metal consumes energy, and the horizontal displacement between layers is amplified twice through the displacement amplification rod and the gear under the condition and can be amplified to 4-8 times, so that the energy consumption of the low-yield-point metal part in the composite energy consumption device is more sufficient, the efficiency is higher, meanwhile, the wall body also has certain energy consumption capacity, the composite energy consumption device in the structural system is high in consumption efficiency and small in use space, a door and window opening can be opened, and the use space of a building and the attractiveness of the building cannot be influenced. The structure realizes multi-level control energy consumption, fully exerts the functions of each energy consumption device in different stages, improves the energy consumption efficiency, and can effectively lighten the seismic response of the main structure.
Disclosure of Invention
In order to improve the lateral rigidity and the overall anti-seismic performance of a steel structure, ensure that a wall body has certain energy consumption capability, make up the defects of the conventional energy consumption damping steel beam column structure and improve the energy consumption efficiency and the applicability of a damper in the steel structure, the invention provides an assembly type composite energy consumption steel beam column structure capable of realizing multistage vibration damping and secondary displacement amplification. The assembled composite energy-consuming steel beam column structure has the characteristics of assembly, convenience in arrangement of energy-consuming devices, high multilevel energy-consuming and energy-consuming capabilities and the like. When wind vibration or earthquake acts, the assembled composite energy consumption steel beam column structure can reduce the damage of a main structure member and protect the main structure member from being damaged, effectively controls the interlayer displacement of a steel structure, can consume energy in multiple stages, and consumes a large amount of energy input into the structure in the earthquake action. The assembled composite energy-consumption steel beam column structure can be prefabricated and rapidly assembled on site, green construction on site is realized, the occupied space is small, and a door and window opening can be opened. The composite energy-consumption type assembled steel beam column structure realizes multi-stage control energy consumption and is clear in energy consumption mechanism, the displacement amplification rod and the gear can amplify horizontal displacement between layers of the structure twice, and the composite energy-consumption type assembled steel beam column structure has strong energy consumption capacity under the action of wind vibration or earthquake and can reduce damage and destruction of a main body of a steel structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the structure comprises an assembly type steel beam 1, an assembly type steel column 2, an energy consumption wall 3, a notch 4, a door and window opening 5, an upper connecting plate 6, a lower connecting plate 7, a vertical type movable displacement support 8, a displacement amplification rod 9, an L-shaped fixed support 10, a U-shaped sliding rod 11, an ear plate 12, a gear rotating shaft 13, a pin bolt 14, a bolt 15, a front cover plate, a rear cover plate, a fan-shaped notch 17, a cylindrical bearing block 18, a limiting rotating plate 19, an annular groove 20, a shear key 21, a shear block 22, an outer circular ring 23, low-yield-point steel 24 and an inner limiting circular ring 25.
The assembly type steel beam 1 and the assembly type steel column 2 are welded with each other, and the energy dissipation wall 3 is fixed in a frame structure formed by the assembly type steel beam 1 and the assembly type steel column 2 through a pin bolt 14; the notch 4 and the door and window opening 5 are arranged on the energy consumption wall 3; the composite energy dissipation device is fixedly connected with the lower connecting plate 7, the composite energy dissipation device is connected with the U-shaped sliding rod 11 through a gear rotating shaft 13, the upper portion of the displacement amplification rod 9 is connected with one end of the vertical movable displacement support 8 through an ear plate 12, the middle upper portion of the displacement amplification rod 9 is connected with the L-shaped fixed support 10 through one ear plate 12, and the lower portion of the displacement amplification rod 9 is connected with the U-shaped sliding rod 11 through the other ear plate 12; the other end of the vertical movable displacement support 8 is fixedly connected with the upper connecting plate 6, the energy dissipation walls 3 are distributed on two sides of the composite energy dissipation device, the energy dissipation walls 3 are respectively fixedly connected with the upper connecting plate 6 and the lower connecting plate 7, and the upper connecting plate 6 and the lower connecting plate 7 are connected with the assembled steel beam 1 through bolts 15.
The composite energy consumption device comprises the following components: the front cover plate 16 and the rear cover plate 16 are respectively buckled on two surfaces of the limiting rotating plate 19, and opposite annular grooves 20 are respectively formed in the inner sides of the front cover plate 16 and the rear cover plate and two sides of the limiting rotating plate 19 to form a cavity; the shear key 21 is arranged between the annular groove 20 and the front and rear cover plates 16, and the shear block 22 is embedded into the formed cavity; the gear rotating shaft 13 penetrates through the front cover plate 16, the rear cover plate 16 and the limiting rotating plate 19, the front cover plate 16, the limiting rotating plate 19 and the shearing block 22 are pre-pressed, and the gear rotating shaft 13 and the limiting rotating plate 19 cannot rotate; the gear rotating shaft 13 and the front and rear cover plates 16 can rotate, two ends of the low-yield-point steel 24 are fixedly connected with the outer circular ring 23 and the inner limiting circular ring 25 respectively, the outer circular ring 23 is fixedly connected with the front and rear cover plates 16, and the inner limiting circular ring 25 is next to the limiting rotating plate 19 and can rotate. Fan-shaped notches 17 are formed in the periphery of the front cover plate 16 and the rear cover plate; the front and rear cover plates 16 are mounted on a column-type bolster 18.
The displacement amplification rod 9 is hinged with the L-shaped fixed support 10 through an ear plate, and the hinged position of the ear plate is positioned at the middle upper part between layers, so that the horizontal displacement between the layers is ensured to be amplified for the first time; through the consolidation between gear pivot 13 and spacing rotating plate 19, utilize the radius that spacing rotating plate 19 is greater than the radius of gear pivot 13, ensure that the horizontal displacement between the layer is enlargied for the second time.
The distance between the centers of the lower hinged round hole and the middle upper hinged round hole of the displacement amplification rod 9 is L1The distance between the centers of the upper hinge round hole and the middle upper hinge round hole of the displacement amplification rod 9 is L2，L1And L2The ratio of (A) to (B) is between 2 and 4, namely the magnification of the horizontal displacement between the first time layers is between 2 and 4.
The ratio of the radius of the gear rotating shaft 13 to the radius of the limiting rotating plate 19 is controlled to control the amplification multiple of the horizontal displacement between the layers of the second time, and the amplification multiple of the horizontal displacement between the layers of the second time is controlled to be about 3 times, so that the effect of the second displacement method is achieved.
In order to shear the shear block 22 and consume energy under wind vibration or frequent earthquakes and to yield and consume energy under rare earthquakes by using the low-yield-point steel 24, two fan-shaped structures are protruded on the outer side of the limiting rotating plate 19, and the two fan-shaped structures protruded on the outer side are of central symmetry structures; meanwhile, the two fan-shaped structures are protruded on the inner side of the inner limiting ring 25, the two fan-shaped structures are centrosymmetric, and for a floor with the floor height of H, the arc length between the two fan-shaped structures protruded on the inner side of the inner limiting ring 25 and the two fan-shaped structures protruded on the outer side of the limiting rotating plate 19 is between H/200 and H/100.
Shear block 22 is made of lead, tin, nickel or lead alloy having a low yield point and excellent ductility, and a viscoelastic material.
In order to ensure that the low yield point steel 24 can be easily subjected to yield and energy consumption in rare earthquakes, the yield point of the low yield point steel 24 material is not more than 200 MPa. The low yield point steel 24 has a weakened cross-section in the shape of an X, triangle, or hollow diamond.
The energy consumption wall 3 is provided with a notch 4 for having certain energy consumption capacity under rare earthquakes, and the area of the notch 4 is not more than 30 percent of the area of the energy consumption wall 3.
The assembly type steel beam 1 and the assembly type steel column 2 are prefabricated and rapidly assembled on site; the composite energy dissipation device in the structure can effectively control the interlayer displacement of the structure while improving the lateral stiffness of the structure, efficiently consumes the energy of the earthquake motion input structure by amplifying the energy of the horizontal displacement between the layers for two times, has enough ductility, and is easy to replace after earthquake or damage.
The functions of the invention are as follows:
the assembled composite energy-consumption steel beam column structure capable of realizing multistage vibration reduction and secondary displacement amplification can be prefabricated and rapidly assembled on site, so that multistage control on energy consumption is realized, the wall body has certain energy consumption capacity, is easy to replace after an earthquake, occupies small space and can be provided with door and window openings; the energy consumption mechanism of the energy consumption device in the structure is clear, and the energy consumption efficiency of the energy consumption device is remarkably improved, especially under rare earthquakes. The steel beam column has certain energy consumption capacity, a limiting function and enough lateral stiffness under the action of wind vibration or frequent earthquakes, can obviously dissipate the energy of the structure under the action of rare earthquakes, reduces the damage of the steel beam column and protects the steel beam column from being damaged, and finally improves the energy consumption capacity and the safety of the whole steel structure building.
Compared with the prior art, the invention has the following advantages:
1) the assembled composite energy-consumption steel beam column structure capable of achieving multistage vibration reduction and secondary displacement amplification can be prefabricated and quickly assembled on site, a composite energy-consumption device in the structure is connected with a U-shaped sliding rod through a gear, the upper portion of a displacement amplification rod is connected with a vertical movable displacement support through an ear plate, the middle portion of the displacement amplification rod is connected with an L-shaped fixing support through an ear plate, the lower portion of the displacement amplification rod is connected with the U-shaped sliding rod through an ear plate, the other end of the vertical movable displacement support is fixedly connected with an upper connecting plate, energy-consumption wall bodies are distributed on two sides of the composite energy-consumption device and fixedly connected with the upper connecting plate and the lower connecting plate, the upper connecting plate and the lower connecting plate are.
2) The invention realizes multi-stage control of energy consumption and fully plays the role of each energy consumption part in different stages. Under wind vibration or a frequent earthquake, the lead block in the structure is sheared to consume energy, the vibration energy in the structure is dissipated, after certain horizontal displacement occurs, the limiting function acts to limit the shearing deformation of the lead block, the low-yield-point steel provides lateral stiffness for the structure, and the low-yield-point steel yields and dissipates a large amount of energy in the structure under the rare earthquake.
3) The invention can amplify the shearing deformation of the lead block to 2-4 times of the horizontal displacement between the structural layers under wind vibration or frequent earthquakes, and can amplify the yield displacement of the low-yield-point steel to 4-8 times of the horizontal displacement between the structural layers under rare earthquakes, thereby obviously improving the efficiency of the composite energy consumption device, reducing the same wind vibration response and earthquake response, using a small number of the composite energy consumption devices and reducing the manufacturing cost.
4) The wall body in the structure also has certain energy consumption capability, is easy to replace after earthquake, occupies small space, can open door and window openings, does not influence the use space of the building and the beauty of the building, and is suitable for steel structure buildings with limited arrangement positions of the energy consumption devices and higher requirements on the use space.
Drawings
Fig. 1 is a schematic structural diagram of an assembled composite energy-consuming steel beam column capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 2 is a single-span schematic diagram of the assembled composite energy-consuming steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification.
FIG. 3 is a single-span detail view of the assembled composite energy-consuming steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 4 is an installation diagram of an assembly type composite energy consumption steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 5 is a diagram of a composite energy dissipation device and a connecting member of the assembled composite energy dissipation steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 6 is an enlarged bar diagram of the assembled composite energy-consuming steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 7 is a front view of the fabricated composite energy-dissipating steel beam-column structure capable of multi-stage damping and secondary displacement amplification.
Fig. 8 is a sectional view a-a of the assembled composite energy-consuming steel beam-column structure capable of multi-stage damping and secondary displacement amplification according to the present invention.
Fig. 9 is a simplified diagram of the initial state of the fabricated composite energy-consuming steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification.
Fig. 10 is a simplified diagram of the assembled composite energy-consuming steel beam-column structure capable of multi-stage damping and secondary displacement amplification under wind vibration or multiple earthquakes.
Fig. 11 is a simplified diagram of the assembled composite energy-consuming steel beam-column structure capable of multi-stage vibration reduction and secondary displacement amplification in rare earthquakes.
In the figure: 1-assembled steel beam, 2-assembled steel column, 3-energy dissipation wall, 4-notch, 5-door and window opening, 6-upper connecting plate, 7-lower connecting plate, 8-vertical movable displacement support, 9-displacement amplification rod, 10-L-shaped fixed support, 11-U-shaped sliding rod, 12-lug plate, 13-gear rotating shaft, 14-pin bolt, 15-bolt, 16-front and rear cover plates, 17-sector notch, 18-column bearing block, 19-limiting rotating plate, 20-annular groove, 21-shear key, 22-shear block, 23-outer circular ring, 24-low yield point steel and 25-inner limiting circular ring.
Detailed Description
Example 1:
aiming at a certain 30-layer steel frame structure in an 8-degree fortification intensity area and aiming at the seismic requirements of the 30-layer steel frame structure, the assembly type composite energy consumption steel beam column structure capable of realizing multistage vibration reduction and secondary displacement amplification is adopted to realize the vibration reduction. The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the present invention is an example of a design of an assembled composite energy-consuming steel beam-column structure capable of multi-stage damping and secondary displacement amplification, which includes: the energy-saving device comprises an assembled steel beam, an assembled steel column, an energy-consuming wall, a notch, a door and window opening, an upper connecting plate, a lower connecting plate, a vertical movable displacement support, a displacement amplification rod, an L-shaped fixing support, a U-shaped sliding rod, an ear plate, a gear rotating shaft, a pin bolt, a front cover plate, a rear cover plate, a fan-shaped notch, a cylindrical bearing block, a limiting rotating plate, an annular groove, a shear key, a shearing block, an outer circular ring, low-yield-point steel and an inner limiting circular ring. The components are prefabricated in a factory, and bolt holes are reserved in the flange of the assembled steel beam. The front cover plate and the rear cover plate are respectively buckled on two surfaces of the limiting rotating plate, opposite annular grooves are formed in the inner sides of the front cover plate and the rear cover plate and the two sides of the limiting rotating plate to form a cavity, a plate between the annular grooves forms a shearing key, a shearing block is embedded into the formed cavity, a gear rotating shaft penetrates through the front cover plate, the rear cover plate and the limiting rotating plate to be pre-pressed, the front cover plate, the rear cover plate, the limiting rotating plate and the shearing block are not capable of rotating, the gear rotating shaft and the front cover plate and the rear cover plate can rotate, two ends of the low-yield-point steel are respectively fixedly connected with the outer circular ring and the inner limiting circular ring, the outer circular ring and the front cover plate and the rear cover plate are fixedly connected, the inner limiting circular ring is next to. Then the composite energy dissipation device is fixedly connected with the lower connecting plate, the composite energy dissipation device is connected with the U-shaped sliding rod through the gear, the upper portion of the displacement amplification rod is connected with the vertical type moving displacement support through the ear plate, the middle upper portion of the displacement amplification rod is connected with the L-shaped fixed support through the ear plate, the lower portion of the displacement amplification rod is connected with the U-shaped sliding rod through the ear plate, the other end of the vertical type moving displacement support is fixedly connected with the upper connecting plate, the energy dissipation wall bodies are distributed on two sides of the composite energy dissipation device and fixedly connected with the upper connecting plate and. On the construction site, the upper connecting plate and the lower connecting plate are directly connected with the assembled steel beam through bolts, finally the whole structure is assembled, and the specific implementation process can be divided into three stages.
First stage (design stage):
for the 40-layer steel frame structure, a parameter design stage is carried out according to design specification requirements, the section shape of an assembled steel beam 1 in the steel frame structure is determined to be I-shaped, the size is 800mm multiplied by 1000mm multiplied by 100mm, and Q345 is selected as a material; the section of the assembled steel column 2 is rectangular, the size is 700mm multiplied by 500mm, Q345 is selected as a material, the layer height is 4000mm, and the span is 8000 mm.
The assembled composite energy-consumption steel beam column structure suitable for multistage vibration reduction and secondary displacement amplification has the following structural dimensions:
reserving 13 bolt holes with the diameter of 27mm at each side of the flange of the assembled steel beam 1; the upper connecting plate 6 and the lower connecting plate 7 are both Q345 which has the same size of 100mm multiplied by 800mm multiplied by 7000mm, and both sides of the upper connecting plate 6 and the lower connecting plate 7 are reserved with 13 bolt holes with the diameter of 27 mm; the vertical movable displacement support 8 is made of Q345 with the cross section size of 200mm multiplied by 200 mm; the cross-sectional dimension of the displacement amplification rod 9 is 80mm multiplied by 200mm, the material is Q345, the diameters of three round holes on the displacement amplification rod are all 100mm, the distance between the centers of an upper round hole and a middle-upper round hole is 200mm, and the distance between the centers of a lower round hole and the middle-upper round hole is 500 mm; the cross-sectional dimension of the L-shaped fixing bracket 10 is 100mm multiplied by 100mm, and Q345 is selected as a material; the cross section of the U-shaped sliding rod 11 is 100mm multiplied by 100mm, the material is Q345, and the length of the rack is 200 mm; the ear plate 12 has the size of 20mm multiplied by 100mm multiplied by 70mm, and the material is Q345; the diameter of the pin shaft 14 is 50mm, and Q345 is selected as a material; the bolt 15 is 8.8-grade M24, the size of the energy dissipation wall 3 is 50mm multiplied by 4000mm multiplied by 8000mm, the material is selected to be Q345, and a notch 4 with the size of 100mm multiplied by 500mm is arranged on the material.
The composite energy consumption device comprises: the diameter of the front cover plate 16 and the diameter of the rear cover plate 16 are 700mm, the thickness of the front cover plate is 100mm, Q345 is selected as a material, and fan-shaped notches are formed in the range of the front cover plate 16 and the rear cover plate 16 away from the edge 300; the limiting rotating plate 19 is made of Q345, the diameter of the limiting rotating plate is 400mm, the thickness of the limiting rotating plate is 200mm, two fan-shaped parts are protruded on the outer side of the limiting rotating plate 19, the limiting rotating plate is centrosymmetric, the fan-shaped angles are all 30 degrees, and the thickness of the limiting rotating plate is 50 mm; the depth of the arranged annular groove 20 is 20mm, the groove is arranged between the diameter of the circular ring and 120mm and 220mm, the groove is arranged between the diameter of the circular ring and 250mm and 350mm, the hole of the middle gear rotating shaft 13 is 80mm, and the rest part of the disc is not provided with the groove; the width of the shear key 21 is 15mm, and the thickness is 20 mm; the diameter of the outer ring 23 is 700mm, the thickness is 200mm, and Q345 is selected as a material; the diameter of the inner limiting ring 25 is 500mm, the thickness is 200mm, the material is Q345, two sectors are raised on the inner side of the inner limiting ring 25, the centers of the two sectors are symmetrical, the angles of the sectors are 90 degrees, and the thickness is 50 mm; the yield strength of the low yield point steel 24 is 180Mpa, the cross section is X-shaped, the thickness is 20mm, and the number is 18. The filling angle of the low yield point steel 24 between the outer ring 23 and the inner limiting ring 25 is 20 degrees; the diameter of the gear rotating shaft 13 is 80mm, and the material is Q345.
Second stage (factory pre-assembly stage):
according to the size requirements of the energy consumption wall 3, the connecting part and the composite energy consumption device in the first stage, prefabrication and assembly can be carried out in a factory. The front cover plate 16 and the rear cover plate 16 are respectively buckled on two surfaces of the limiting rotating plate 19, opposite annular grooves 20 are formed in the inner sides of the front cover plate 16 and the rear cover plate 16 and on two sides of the limiting rotating plate 19 to form a cavity, a plate between the annular grooves 20 forms a shearing key 21, a shearing block 22 is embedded into the formed cavity, the gear rotating shaft 13 penetrates through the front cover plate 16 and the rear cover plate 19 and pre-compresses the front cover plate 16, the limiting rotating plate 19 and the shearing block 22, the gear rotating shaft 13 and the front cover plate 16 cannot rotate, two ends of the low-yield-point steel 24 are respectively fixedly connected with the outer ring 23 and the inner limiting ring 25, the outer ring 23 and the front cover plate 16 are fixedly connected, the inner limiting ring 25 is next to the limiting rotating plate 19, and the composite energy consumption device is assembled in a factory. Then the composite energy dissipation device is fixedly connected with the lower connecting plate 7, the composite energy dissipation device is connected with the U-shaped sliding rod 11 through the gear rotating shaft 13, the upper portion of the displacement amplification rod 9 is connected with the vertical type movable displacement support 8 through the ear plate 12, the middle upper portion of the displacement amplification rod 9 is connected with the L-shaped fixed support 10 through the ear plate 12, the lower portion of the displacement amplification rod 9 is connected with the U-shaped sliding rod 11 through the ear plate 12, the other end of the vertical type movable displacement support 9 is fixedly connected with the upper connecting plate 6, and the energy dissipation wall bodies 3 are distributed on two sides of the composite energy dissipation device and are respectively fixedly connected with the upper connecting plate 6 and the lower connecting.
Third stage (field assembly stage):
and the prefabricated and processed device in the factory is assembled on site according to the second stage, the upper connecting plate 6 and the lower connecting plate 7 are connected with the fabricated steel beam 1 through the bolts 15, and the fabricated composite energy-consuming steel beam column structure with multistage vibration reduction and secondary displacement amplification can be completely completed.
By establishing a finite element analysis model of the steel frame structure, analysis is carried out under 8-degree frequent earthquake and rare earthquake, and the assembled composite energy-consuming steel beam column structure capable of multistage vibration reduction and secondary displacement amplification is compared with the earthquake response of the corresponding common steel structure, so that the assembled composite energy-consuming steel beam column structure capable of multistage vibration reduction and secondary displacement amplification is better in anti-seismic performance, the interlayer displacement angle damping rate under the frequent earthquake can reach 30.7%, the interlayer displacement angle damping rate under the rare earthquake can reach 45.6%, and the damage degree of the main body structure of the steel frame is obviously reduced.
The above is an exemplary embodiment of the present invention, but the implementation of the present invention is not limited thereto.
Claims (6)
1. But assembled compound power consumption girder steel post structure that multistage damping and displacement secondary were enlargied, its characterized in that: the structure comprises an assembly type steel beam (1), an assembly type steel column (2), an energy consumption wall (3), a notch (4), a door and window opening (5), an upper connecting plate (6), a lower connecting plate (7), a vertical type movable displacement support (8), a displacement amplification rod (9), an L-shaped fixed support (10), a U-shaped sliding rod (11), an ear plate (12), a gear rotating shaft (13), a pin bolt (14), a bolt (15), a front cover plate, a rear cover plate (16), a fan-shaped notch (17), a cylindrical bearing block (18), a limiting rotating plate (19), an annular groove (20), a shear key (21), a shear block (22), an outer ring (23), low-yield-point steel (24) and an inner limiting ring (25);
the assembly type steel beam (1) and the assembly type steel column (2) are welded with each other, and the energy dissipation wall (3) is fixed in a frame structure formed by the assembly type steel beam (1) and the assembly type steel column (2) through a pin bolt (14); the notch (4) and the door and window opening (5) are arranged on the energy consumption wall (3); the composite energy dissipation device is fixedly connected with the lower connecting plate (7), the composite energy dissipation device is connected with the U-shaped sliding rod (11) through a gear rotating shaft (13), the upper part of the displacement amplification rod (9) is connected with one end of the vertical type movable displacement support (8) through an ear plate (12), the middle upper part of the displacement amplification rod (9) is connected with the L-shaped fixed support (10) through one ear plate (12), and the lower part of the displacement amplification rod (9) is connected with the U-shaped sliding rod (11) through the other ear plate (12); the other end of the vertical movable displacement support (8) is fixedly connected with the upper connecting plate (6), the energy dissipation walls (3) are distributed on two sides of the composite energy dissipation device, the energy dissipation walls (3) are respectively fixedly connected with the upper connecting plate (6) and the lower connecting plate (7), and the upper connecting plate (6) and the lower connecting plate (7) are connected with the assembled steel beam (1) through bolts (15);
the composite energy consumption device comprises the following components: the front cover plate and the rear cover plate (16) are respectively buckled on two surfaces of the limiting rotating plate (19), and opposite annular grooves (20) are formed in the inner sides of the front cover plate and the rear cover plate (16) and two sides of the limiting rotating plate (19) to form a cavity; the shear key (21) is arranged between the annular groove (20) and the front cover plate and the rear cover plate (16), and the shear block (22) is embedded into a formed cavity; the gear rotating shaft (13) penetrates through the front cover plate (16), the rear cover plate (16) and the limiting rotating plate (19) and is pre-pressed against the front cover plate, the rear cover plate (16), the limiting rotating plate (19) and the shearing block (22), and the gear rotating shaft (13) and the limiting rotating plate (19) cannot rotate; the gear rotating shaft (13) and the front and rear cover plates (16) can rotate, two ends of the low-yield-point steel (24) are fixedly connected with the outer circular ring (23) and the inner limiting circular ring (25) respectively, the outer circular ring (23) and the front and rear cover plates (16) are fixedly connected, and the inner limiting circular ring (25) is next to the limiting rotating plate (19) and can rotate; fan-shaped notches (17) are formed in the peripheral circumference of the front cover plate and the rear cover plate (16); the front cover plate and the rear cover plate (16) are arranged on the column-shaped bearing block (18);
the displacement amplification rod (9) is hinged with the L-shaped fixed support (10) through an ear plate, and the hinged position of the ear plate is positioned at the middle upper part between layers, so that the horizontal displacement between the layers is ensured to be amplified for the first time; the horizontal displacement between layers is ensured to be amplified for the second time by fixedly connecting the gear rotating shaft (13) and the limiting rotating plate (19) and utilizing the fact that the radius of the limiting rotating plate (19) is larger than that of the gear rotating shaft (13); the distance between the centers of the lower hinged round hole and the middle upper hinged round hole of the displacement amplification rod (9) is L1The distance between the centers of the upper hinged round hole and the middle upper hinged round hole of the displacement amplification rod (9) is L2，L1And L2The ratio of (A) to (B) is 2-4, namely the magnification of the horizontal displacement between the first time layers is 2-4;
the ratio of the radius of the gear rotating shaft (13) to the radius of the limiting rotating plate (19) is controlled to control the amplification multiple of the horizontal displacement between the layers of the second time, and the amplification multiple of the horizontal displacement between the layers of the second time is controlled to be 3 times, so that the effect of the second displacement method is achieved.
2. The fabricated composite energy-consuming steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification according to claim 1, wherein: in order to shear the shear block (22) and consume energy under wind vibration or frequent earthquakes and yield and consume energy of the low-yield-point steel (24) under rare earthquakes, two fan-shaped structures are protruded on the outer side of the limiting rotating plate (19), and the two fan-shaped structures protruded on the outer side are centrosymmetric structures; meanwhile, the two fan-shaped structures are protruded on the inner side of the inner limiting ring (25), the two fan-shaped structures are centrosymmetric, and for a floor with the floor height of H, the arc length between the two fan-shaped structures protruded on the inner side of the inner limiting ring (25) and the fan-shaped structures protruded on the outer side of the limiting rotating plate (19) is H/200-H/100.
3. The fabricated composite energy-consuming steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification according to claim 1, wherein: the shear block (22) is made of lead, tin, nickel or a lead alloy and a viscoelastic material.
4. The fabricated composite energy-consuming steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification according to claim 1, wherein: in order to ensure that the low yield point steel (24) can easily yield and consume energy under rare earthquakes, the yield point of the used low yield point steel (24) material is not more than 200 Mpa; the low yield point steel (24) has a weakened section in the form of an X, triangle or hollow diamond.
5. The fabricated composite energy-consuming steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification according to claim 1, wherein: the energy consumption wall (3) is provided with a notch (4) for having certain energy consumption capability under rare earthquakes, and the area of the notch (4) is not more than 30 percent of the area of the energy consumption wall (3).
6. The fabricated composite energy-consuming steel beam column structure capable of multi-stage vibration reduction and secondary displacement amplification according to claim 1, wherein: the assembly type steel beam (1) and the assembly type steel column (2) are prefabricated and are rapidly assembled on site; the composite energy dissipation device in the structure can effectively control the interlayer displacement of the structure while improving the lateral stiffness of the structure, efficiently consumes the energy of the earthquake motion input structure by amplifying the energy of the horizontal displacement between the layers for two times, has enough ductility, and is easy to replace after earthquake or damage.
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| CN109629675A (en) * | 2019-01-15 | 2019-04-16 | 江苏中谊抗震工程股份有限公司 | A kind of assembled beam-column lead extrusion pressing type energy dissipation node |
| CN112854510B (en) * | 2021-01-11 | 2022-03-08 | 西安建筑科技大学 | Viscous shear type damper with replaceable steel inserting plate |
| CN113775069B (en) * | 2021-08-20 | 2022-10-18 | 北京工业大学 | Energy dissipation support with displacement amplification and repeated disassembly and assembly functions |
| CN113530340B (en) * | 2021-08-31 | 2022-11-08 | 石河子大学 | Steel and immature soil mixed anti-seismic structure |
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| CA2380887C (en) * | 1999-08-03 | 2009-07-07 | Imad H. Mualla | A device for damping movements of structural elements and a bracing system |
| CN102155056B (en) * | 2011-04-02 | 2014-04-02 | 北京工业大学 | Wall-type metal torsion-shear damper |
| CN203361394U (en) * | 2013-07-12 | 2013-12-25 | 上海大学 | Viscous damper with multi-lever displacement amplifying device |
| CN203594127U (en) * | 2013-10-24 | 2014-05-14 | 上海大学 | Rotary shearing plate damper with power outlet base |
| KR101631052B1 (en) * | 2016-03-09 | 2016-06-15 | 주식회사 디알비동일 | Displacement amplification damper |
| CN106988594B (en) * | 2017-05-27 | 2023-09-22 | 河北工业大学 | Displacement amplification type friction damper and assembly construction process |
| CN107246083B (en) * | 2017-07-24 | 2019-03-19 | 江苏博森建筑设计有限公司 | Energy consuming mechanism in space folding formula viscous damper and frame structure |
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