CN111425037B - Steel structure column base with replaceable metal round bar energy dissipation damper - Google Patents
Steel structure column base with replaceable metal round bar energy dissipation damper Download PDFInfo
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- CN111425037B CN111425037B CN202010164537.7A CN202010164537A CN111425037B CN 111425037 B CN111425037 B CN 111425037B CN 202010164537 A CN202010164537 A CN 202010164537A CN 111425037 B CN111425037 B CN 111425037B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
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- Vibration Prevention Devices (AREA)
Abstract
A steel structure column base with a replaceable metal round bar energy dissipation damper is characterized by comprising a column body, a bracket top plate, an external stiffening rib, a metal round bar energy dissipation damper, a bracket bottom plate, a ball support, an anchoring device, an internal stiffening rib and auxiliary accessories; the auxiliary fittings comprise bolts, square gaskets and double nuts. The column body is of a steel structure, and the bracket top plate and the bracket floor are arranged outside the column body and are respectively in welding contact with the column body at a certain height; the upper end of the metal round bar energy dissipation damper is connected with the top plate of the bracket through a bolt, and the lower end of the metal round bar energy dissipation damper is connected with the anchor rod through a metal sleeve; the bottom of the anchoring device is embedded into concrete, and the upper end of the anchoring device is connected with the metal round bar energy dissipation damper through the metal sleeve to provide anti-pulling force for the metal round bar energy dissipation damper; the device can dissipate earthquake energy, reduce the earthquake response and damage of the structure, and has the advantages of convenient construction, low cost and quick recovery after earthquake.
Description
Technical Field
The invention belongs to the technical field of civil engineering structure engineering.
Background
In recent years, with the introduction of concepts such as recoverable functional structures, tough cities and the like, the repairability of engineering structures is receiving wide attention, which not only requires that the engineering structures have good performance in earthquakes, but also requires that the structures can be quickly repaired after earthquake and put into normal use. The existing structural design follows the basic design principle of 'strong column and weak beam', and seismic energy is dissipated through frame beam end plastic hinges; although the ductility of the structure is ensured, the recoverability after the earthquake is poor, and the process of replacing the structural member bearing the gravity load is complex, so that a large amount of manpower and material resources are required to be input. The earthquake damage fuse technology concentrates structural earthquake damage on the fuse, ensures that main structural components are in an elastic state, and can realize low-cost quick recovery of structural functions only by replacing the fuse after an earthquake.
The steel has the advantages of high strength and good ductility, and is widely applied to engineering structures; the light high-strength steel structural member can reduce the mass of an upper structure, so that the horizontal earthquake action is reduced; but the fine member section makes the steel structural member appear the unstability problem very easily simultaneously, and steel intensity is higher, and stable more plays control effect to structural design. In an engineering structure, the axial pressure ratio of a first-layer column is often higher, a rigid connection column base is usually adopted, and when the structure is subjected to the action of a horizontal earthquake, the first-layer column also bears a part of bending moment; under the combined action of bending, the cross section of the lower end of the column is very easy to have the problems of local buckling of a plate and premature plastic hinge of the cross section of the column, so that the integral plastic energy consumption capacity of the structure is greatly reduced, and the phenomenon goes against the existing design theory of 'strong columns and weak beams'. In addition, the repair work is also difficult if damage occurs due to the large internal forces in the column. Although the above problems can be avoided by using hinged pedestals, the side stiffness of the first layer is also reduced, requiring the necessary support to be provided in the first layer to meet the inter-layer displacement requirements specified by the code.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems with existing column shoes. Therefore, the invention provides a steel structure column base with a replaceable metal round bar energy dissipation damper, which can be used in a steel structure house. This take steel construction column foot of removable metal rod energy dissipation attenuator introduces and damages the fuse technique, can effectively avoid the phenomenon of post lower extreme local buckling or surrender in advance under the condition of the rigidity is moved to the first floor of insubstantial side of cutting down, can also dissipate seismic energy, reduce structure earthquake response and damage, have construction convenience, with low costs, can resume fast after the shake advantage.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a steel structure column base with a replaceable metal round bar energy dissipation damper is characterized by comprising a column body (1), a bracket top plate (2), an external stiffening rib (3), a metal round bar energy dissipation damper (4), a bracket bottom plate (6), a ball support, an anchoring device (9), and a ball support comprising a concave part (7) and a convex part (8);
the column body (1) is of a steel structure;
the bracket top plate (2) is arranged outside the cylinder (1) and is in welding contact with the cylinder (1), the bracket top plate (2) is positioned above the bracket bottom plate (6), and the distance between the bracket top plate and the bracket bottom plate is determined according to the length of the on-site metal round bar energy dissipation damper (4);
the bracket bottom plate (6) is arranged at the bottom of the column body (1) and is in welding contact with the column body (1); the bracket bottom plate (6) is a square plate, and the periphery of the bracket bottom plate is provided with a plurality of side arc-shaped notches (601) and angle arc-shaped notches (602);
an external stiffening rib (3) is welded between the bracket top plate (2) and the bracket bottom plate (6) outside the surrounding column body (1) for enhancing the stress stability of the bracket top plate (2) and the bracket bottom plate (6);
the upper end of the metal round bar energy dissipation damper (4) is connected with the bracket top plate (2) through a bolt, and the lower end of the metal round bar energy dissipation damper is connected with the anchoring device (9), so that a certain bending resistance bearing capacity is provided for the column body (1), the device increases the rotation capacity and the energy consumption capacity of a node, and is good in anti-seismic performance and convenient to disassemble and replace;
the ball seat comprises a concave part (7) and a convex part (8); the concave part (7) is provided with a spherical groove, the convex part (8) is provided with a spherical surface, and the concave part (7) and the convex part (8) can be mutually matched;
the bottom of the anchoring device (9) is embedded into concrete, and the upper end of the anchoring device is connected with the metal round bar energy dissipation damper (4) to provide anti-pulling force for the metal round bar energy dissipation damper (4).
The metal round bar energy dissipation damper (4) is of a round steel pipe structure, and the metal round bar energy dissipation damper (4) comprises a metal round bar core rod (4-1), a metal sleeve (4-2), two filling guard flaps (4-4) and a damper bolt (4-3);
the metal round bar core rod (4-1) is a round steel bar and comprises an end threaded area (4-101), an end expanded area (4-102), a middle energy dissipation area (4-103) and middle convex ribs (4-105);
the metal sleeve (4-2) is a round steel pipe, the inner diameter of the metal sleeve is the same as the expanded area of the end part of the metal round bar core rod (4-1), the outer diameter is determined according to the stability requirement, and the middle part of the metal sleeve is provided with a plurality of threaded holes (4-201);
the damper bolt (4-3) is screwed into the threaded hole (4-201) and tightly props against the outer surface of the filling valve guard (4-4), so that the relative fixation of the positions of all components is realized;
the filling valve guard (4-4) is an arc-shaped steel plate, the radius of the inner surface of the filling valve guard is slightly larger than the outer diameter of the middle energy dissipation area (4-103) of the metal round bar core rod (4-1), the central angle of the filling valve guard is slightly smaller than 180 degrees, and a groove (4-401) is dug in the middle of the filling valve guard (4-4);
the filling guard flap (4-4) fills the space between the middle energy dissipation area (4-103) and the metal sleeve (4-2) and restricts the lateral deformation of the metal round bar core rod (4-1).
The metal round bar core rod (4-1) is made of low-yield-point steel and cut into a shape with an intermediate energy dissipation area (4-103) and ribs (4-105), the intermediate energy dissipation area (4-103) can yield first under the action of force, and the metal round bar core rod (4-1) is restrained by an external metal sleeve (4-2) so as to prevent the possible instability problem when the metal round bar core rod (4-1) is pressed.
And an internal stiffening rib is arranged in the inner space of the column body, the lower end of the internal stiffening rib is flush with the upper surface of the bottom plate (6) and is welded, and the upper end of the internal stiffening rib is flush with the upper surface of the bracket top plate (2).
The beneficial effect that above-mentioned technical scheme brought is: each part of the column base has definite functions, and the ball support provides shear-resistant bearing capacity for the column base and enables the column base to have certain rotation capacity; the upper end and the lower end of the metal round bar energy dissipation damper are detachably connected, so that bending resistance bearing capacity is provided for the column base, and the maximum bending moment of the column end can be controlled by controlling the yield force of the metal round bar energy dissipation damper, so that the phenomenon that the column body does not develop plasticity or has local buckling is effectively guaranteed. The metal round bar energy dissipation damper is an expected damage part of a steel column base, and can dissipate earthquake energy by developing plastic deformation under the action of an earthquake, so that earthquake reaction and structural damage can be effectively reduced, and the function of the steel column base can be quickly recovered by replacing the metal round bar energy dissipation damper after the earthquake. The metal round bar energy dissipation damper increases the rotation capacity and the energy consumption capacity of the node, has good anti-seismic performance and is convenient to disassemble and replace.
Drawings
FIG. 1 is a schematic elevation view of a steel structural column shoe of the present invention;
FIG. 2 is a schematic top view of the steel structural column shoe of the present invention;
FIG. 3 is a schematic cross-sectional view of the steel structural column shoe of the present invention at A-A;
FIG. 4 is a schematic view of a pallet base of the present invention;
FIG. 5 is a schematic view of the pallet top plate 2 of the present invention;
FIG. 6 is a schematic view of the anchoring device 9 of the present invention;
figure 7 is a schematic view of the external structure of the metal round bar energy-dissipating damper 4 of the invention;
FIG. 8 is a front view (a) and a plan view (b) of the metal sleeve 4-2 of the present invention;
FIG. 9 is a front view (a) of the metal round bar core bar 4-1 and a front view (b) of the filler flap 4-4 of the present invention;
FIG. 10 is a schematic view of a ball support component of the present invention;
FIG. 11 is a schematic view of the external stiffener 3 of the present invention;
FIG. 12 is a schematic view of the construction of the invention with the H-section post attached to the bracket floor;
fig. 13 is an alternative two mounting views of the ball-socket joint of the present invention.
Numerical labeling:
a column (1), an external stiffener (3);
socket top plate (2): a circular hole (501) and a cylindrical hole (502);
bracket floor (6): an arc notch (601) and an angular arc notch (602);
a ball support: a concave part (7) and a convex part (8);
auxiliary parts: the bolt (401), the square gasket (402) and the double nuts (403);
anchoring device (9): the device comprises a metal sleeve (901), an anchor bolt (902), an anchor plate (903) and a nut (904);
the metal round bar energy dissipation damper (4): the device comprises a metal round bar core bar (4-1), a metal sleeve (4-2), two filling guard flaps (4-4) and a damper bolt (4-3);
metal round bar core bar (4-1): the end part is provided with a threaded area (4-102), an end part expanded area (4-103), a middle energy dissipation area (4-104), an arc transition area (4-105), a threaded hole (4-201) and a groove (4-401).
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings, and it should be specifically described that the key technology of the present invention is to install a replaceable metal round bar energy dissipation damper on a steel structure column base, and any changes in the shape and structure of the column and the ball seat for installing the metal round bar energy dissipation damper should be within the protection scope of the present invention.
The steel structure column base with the replaceable metal round bar energy dissipation damper comprises a column body (1), a bracket top plate (2), an external stiffening rib (3), a metal round bar energy dissipation damper (4), a bracket bottom plate (6), a ball support, an anchoring device (9), an internal stiffening rib, auxiliary accessories and the like. The auxiliary fittings comprise bolts (401), square gaskets (402), double nuts (403) and the like. The ball support comprises a concave part (7) and a convex part (8); the anchoring device (9) comprises a metal sleeve (901), an anchoring bolt (902), an anchoring plate (903), a nut (904) and the like.
The column body (1) is of a steel structure, and the structural form of the column body is a box-shaped section column. The column body (1) can be replaced by an H-section column in practical application, only a plate parallel to a web needs to be added to the H-section column in the range below the bracket top plate (2), and the original web of the H-section column is connected with a stiffening rib in the column through welding to form a section form the same as that of a box-section column;
the bracket top plate (2) is arranged outside the column body (1) and is in welding contact with the column body (1) at a certain height, the bracket top plate (2) is positioned above the bracket bottom plate (6), and the distance between the bracket top plate and the bracket bottom plate is determined according to the length of the on-site metal round bar energy dissipation damper (4). The bracket top plate (2) is provided with a cylinder hole (502) in the middle and a plurality of round holes (501) at the periphery, and the bracket top plate can be formed by cutting a whole plate or welding and combining a plurality of square plates.
The bracket bottom plate (6) is arranged at the bottom of the column body (1) and is in welding contact with the column body (1). The bracket bottom plate (6) is a square plate, a plurality of side arc-shaped notches (601) and angle arc-shaped notches (602) are formed in the periphery of the bracket bottom plate, the size of each specific notch is adjusted according to actual design requirements, and the sizes of the notches meet the requirement that the metal round bar energy dissipation damper (4) is installed and cannot collide with the metal round bar energy dissipation damper.
Outside surrounding the column (1), and welding outside stiffening rib (3) between bracket roof (2), bracket bottom plate (6) for strengthen bracket roof (2) and bracket bottom plate (6) atress stability. The external stiffening ribs (3) are subjected to chamfering treatment at two right-angle positions to form notches (301), so that the concentration of welding seams can be effectively avoided.
The upper end of the metal round bar energy dissipation damper (4) is connected with the bracket top plate (2) through a bolt, the lower end of the metal round bar energy dissipation damper is connected with the anchoring device (9) through a metal sleeve (901), certain bending-resistant bearing capacity is provided for the column body (1), the device increases the rotation capacity and the energy consumption capacity of the node, and the device is good in anti-seismic performance and convenient to detach and replace.
The ball seat comprises a concave part (7) and a convex part (8). The concave part (7) is a prefabricated steel component with a spherical groove, the convex part (8) is a prefabricated steel component with a spherical surface, and the concave part (7) and the convex part (8) can be matched with each other.
The anchoring device (9) comprises a metal sleeve (901), an anchoring bolt (902), an anchoring plate (903), a nut (904) and the like.
The metal sleeve (901) is connected with the top of the anchor bolt (902) through a bolt, and the connection length is half of the length of the metal sleeve (901). The anchor bolt (902) penetrates through the anchor plate (903) and is fixed with the bottom surface of the anchor plate (903) through a nut (904).
The bottom of the anchoring device (9) is embedded into concrete, and the upper end of the anchoring device is connected with the metal round bar energy dissipation damper (4) through the metal sleeve (901) to provide anti-pulling force for the metal round bar energy dissipation damper (4).
The metal round bar energy dissipation damper (4) is of a round steel pipe structure, and the metal round bar energy dissipation damper (4) comprises a metal round bar core rod (4-1), a metal sleeve (4-2), two filling guard flaps (4-4) and a damper bolt (4-3);
the metal round bar core rod (4-1) is a round steel bar and comprises an end threaded area (4-101), an end expanded area (4-102), a middle energy dissipation area (4-103) and middle convex ribs (4-105);
the metal sleeve (4-2) is a round steel pipe, the inner diameter of the metal sleeve is the same as the expanded area of the end part of the metal round bar core rod (4-1), the outer diameter is determined according to the stability requirement, and the middle part of the metal sleeve is provided with a plurality of threaded holes (4-201);
the damper bolt (4-3) is screwed into the threaded hole (4-201) and tightly props against the outer surface of the filling valve guard (4-4), so that the relative fixation of the positions of all components is realized;
the filling valve guard (4-4) is an arc-shaped steel plate, the radius of the inner surface of the filling valve guard is slightly larger than the outer diameter of the middle energy dissipation area (4-103) of the metal round bar core rod (4-1), the central angle of the filling valve guard is slightly smaller than 180 degrees, and a groove (4-401) is dug in the middle of the filling valve guard (4-4).
The filling guard flap (4-4) fills the space between the middle energy dissipation area (4-103) and the metal sleeve (4-2) and restricts the lateral deformation of the metal round bar core rod (4-1).
The metal round bar core rod (4-1) is made of low-yield-point steel and cut into a shape with an intermediate energy dissipation area (4-103) and ribs (4-105), the intermediate energy dissipation area (4-103) can yield first under the action of force, and the metal round bar core rod (4-1) is restrained by an external metal sleeve (4-2) so as to prevent the possible instability problem when the metal round bar core rod (4-1) is pressed.
And an internal stiffening rib is arranged in the inner space of the column body, the lower end of the internal stiffening rib is flush with the upper surface of the bottom plate (6) and is welded, and the upper end of the internal stiffening rib is flush with the upper surface of the bracket top plate (2).
The following detailed description is made with reference to the accompanying drawings.
As shown in fig. 1, the steel structure column foot with the replaceable metal round bar energy dissipation damper comprises a column body (1), a bracket top plate (2), an external stiffening rib (3), a metal round bar energy dissipation damper (4), a bracket bottom plate (6), a ball support and an anchoring device (9); the ball support comprises a concave part (7) and a convex part (8); the anchoring device (9) comprises a metal sleeve (901), an anchoring bolt (902), an anchoring plate (903), a nut (904) and the like.
The cylinder (1) is the steel construction, and its structure is box section post in this embodiment. The column body (1) can be replaced by an H-section column in practical application, as shown in fig. 12, only a plate parallel to a web needs to be added to the H-section column within the range below a top plate of a bracket, and the original web of the H-section column is welded with a stiffening rib in the column to form the same section form of a box-section column;
the bracket top plate (2) is arranged outside the column body (1) and is in welding contact with the column body (1) at a certain height, the bracket top plate (2) is arranged above the bracket bottom plate (6), and the distance between the bracket top plate and the bracket bottom plate is determined according to the length of the on-site metal round bar energy dissipation damper (4). The bracket top plate (2) is provided with a cylinder hole (502) in the middle and a plurality of round holes (501) at the periphery, and the bracket top plate can be formed by cutting a whole plate or welding and combining a plurality of square plates.
The bracket bottom plate (6) is arranged at the bottom of the column body (1) and is in welding contact with the column body (1). As shown in fig. 4, the bracket bottom plate (6) is a square plate, the periphery of the bracket bottom plate is provided with a plurality of side arc-shaped notches (601) and corner arc-shaped notches (602), the size of each notch is adjusted according to actual design requirements, and the size of each notch meets the requirement of installing the metal round bar energy dissipation damper (4), so that the metal round bar energy dissipation dampers (4) are prevented from bending and colliding with each other.
Outside surrounding the column (1), and welding outside stiffening rib (3) between bracket roof (2), bracket bottom plate (6) for strengthen bracket roof (2) and bracket bottom plate (6) atress stability. As shown in fig. 11, the external stiffener (3) is chamfered at two right-angle portions to form a notch (301), which can effectively prevent weld concentration.
As shown in fig. 7, the metal round bar energy dissipation damper (4) is a round steel pipe structure, and the metal round bar energy dissipation damper (4) comprises a metal round bar core rod (4-1), a metal sleeve (4-2), two filling guard flaps (4-4) and a damper bolt (4-3);
as shown in fig. 9, the metal round bar core bar (4-1) is a round steel bar, and includes an end threaded zone (4-101), an end expanded zone (4-102), a middle energy dissipation zone (4-103), and middle ribs (4-105);
as shown in fig. 8, the metal sleeve (4-2) is a circular steel tube, the inner diameter of the metal sleeve is the same as the expanded area of the end of the metal round bar core rod (4-1), the outer diameter is determined according to the stability requirement, and the middle part of the metal sleeve is provided with a plurality of threaded holes (4-201);
the damper bolt (4-3) is screwed into the threaded hole (4-201) and tightly props against the outer surface of the filling valve guard (4-4), so that the relative fixation of the positions of all components is realized;
as shown in fig. 9, the filling guard flap (4-4) is an arc-shaped steel plate, the radius of the inner surface of the steel plate is slightly larger than the outer diameter of the middle energy dissipation area (4-103) of the metal round bar core rod (4-1), the central angle of the steel plate is slightly smaller than 180 degrees, and a groove (4-401) is dug in the middle of the filling guard flap (4-4).
The metal round bar core rod (4-1) is made of low-yield-point steel and cut into a shape with a middle energy dissipation area (4-103) and ribs (4-105), the middle energy dissipation area (4-103) can yield first under the action of force, and the metal round bar core rod (4-1) is restrained by an external metal sleeve (4-2) so as to prevent the possible instability problem when the metal round bar core rod (4-1) is pressed;
the filling guard flap (4-4) fills the space between the middle energy dissipation area (4-103) and the metal sleeve (4-2) and restricts the lateral deformation of the metal round bar core rod (4-1).
The upper end of the metal round bar energy dissipation damper (4) is connected with the bracket top plate (2) through a bolt, the lower end of the metal round bar energy dissipation damper is connected with the anchoring device (9) through a metal sleeve (901), certain bending-resistant bearing capacity is provided for the column body (1), the device increases the rotation capacity and the energy consumption capacity of the node, and the device is good in anti-seismic performance and convenient to detach and replace.
As shown in fig. 13, the ball seat includes a concave part (7) and a convex part (8). The concave part (7) is a prefabricated steel component with a spherical groove, the convex part (8) is a prefabricated steel component with a spherical surface, and the concave part (7) and the convex part (8) can be matched with each other; according to design requirements, the positions of the concave part (7) and the convex part (8) can be interchanged; it should be noted that the form of the ball seat given in the present invention is not a limitation, and may also be a commercially available form of the ball seat. Fig. 1 shows the ball seat fitted with the male part (8) above the female part (7) in the same way as the ball seat in fig. 13(a), while fig. 13(b) shows another possible fitting of the ball seat (male part 8 below the female part 7).
As shown in fig. 6, the anchor device (9) includes a metal sleeve (901), an anchor bolt (902), an anchor plate (903), a nut (904), and the like. The metal sleeve (901) is connected with the top of the anchor bolt (902) through a bolt, and the connection length is half of the length of the metal sleeve (901). The anchor bolt (902) penetrates through the anchor plate (903) and is fixed with the bottom surface of the anchor plate (903) through a nut (904).
The bottom of the anchoring device (9) is embedded into concrete, and the upper end of the anchoring device is connected with the metal round bar energy dissipation damper (4) through the metal sleeve (901) to provide anti-pulling force for the metal round bar energy dissipation damper (4).
As shown in figure 3, in order to ensure the direct transmission of force, an internal stiffening rib is arranged in the inner space of the column body, the lower end of the internal stiffening rib is flush with and welded with the upper surface of the bottom plate (6), and the upper end of the internal stiffening rib is flush with the upper surface of the top plate (2) of the bracket.
As an embodiment, auxiliary accessories are needed during construction, and the auxiliary accessories comprise bolts (401), square gaskets (402), double nuts (403) and the like.
The construction method of the steel structure column base with the replaceable metal round bar energy dissipation damper is further disclosed as follows:
step 1, assembling a metal round bar energy dissipation damper (4):
step 1.1, producing parts in a factory:
manufacturing a metal round bar core rod: in the embodiment, the metal round rod core rod (4-1) is preferably made of low-yield-point steel, a round steel rod is selected as a blank, and then the blank is cut by a lathe, and the metal round rod core rod cannot be welded.
Manufacturing a filling protective valve: in the embodiment, the feasible manufacturing scheme of the filling protective flap is that a flat steel plate is cut into a groove and then is cold-processed into an arc shape; in the embodiment, the filling guard flap is made of steel, but any other form of material replacement is within the protection scope of the patent;
manufacturing a metal sleeve: adopting a metal steel pipe as a blank, and forming and tapping holes in the middle;
step 1.2, assembling a product:
wrapping the two metal protective flaps (4) with a cylindrical metal round bar core rod (4-1), and paying attention to the matching of the convex ribs (4-105) with the grooves (4-401); then the matching body is penetrated into the metal sleeve (4-2) to ensure that the centers of the convex rib (4-105), the groove (4-401) and the threaded hole (4-201) are approximately positioned in the same plane; and finally, screwing a damper bolt (4-3) into the threaded hole (4-201) and tightly pushing the outer surface of the filling valve guard (4-401), so that the relative positions of the metal round rod core rod (4-1), the filling valve guard (4-4) and the metal sleeve (4-2) are completely fixed, and the assembly of the assembled sleeve metal round rod energy dissipation damper is completed.
the column body (1) is prefabricated in a factory, and meanwhile, the manufacturing and welding processes of the structures such as the bracket top plate (2), the internal stiffening rib, the external stiffening rib (3), the bracket bottom plate (6) and the like are completed in the factory.
embedding the anchoring device (9) and the ball support into concrete; particularly, the construction process is slightly different according to different types of the ball support; the embodiment adopts a separable ball support, a part of the structure can be anchored into concrete in advance during construction, such as a concave part (7) in fig. 13(a) or a convex part (8) in fig. 13(b), and the part of the structure can be connected with the bracket bottom plate (6) in advance at the factory; if an inseparable ball support is adopted, the ball support needs to be anchored into concrete in advance, and the connection between the ball support and the bracket bottom plate (6) needs to be carried out on a construction site;
step 5, as shown in figure 1, installing the metal round bar energy dissipation damper (4);
5.1) double nuts (403) on the lower side of the bracket top plate (2) are connected with the metal round bar energy dissipation damper (4), and a screw rod connected with the metal round bar energy dissipation damper (4) is exposed for enough thread length;
5.2) connecting the connecting sleeve (901) with the anchoring device (9) through a bolt (902), wherein the bolt (902) needs to reach a designed screwing length which is usually half of the length of the connecting sleeve;
5.3) passing the metal round bar energy dissipation damper (4) through a preset round hole (501) from the lower part of the bracket top plate (2) to the upper part, aligning the lower end of the metal round bar energy dissipation damper (4) with the metal sleeve (901), and connecting the metal round bar energy dissipation damper (4) with the metal sleeve (901);
and 5.4) connecting and fixing a bolt (401) at the upper part of the bracket top plate with a screw rod connected with the metal round bar energy dissipation damper (4), installing a square gasket (402) between the bolt and the screw rod, and finally screwing and fixing a nut (403) below the bracket top plate (2).
Claims (2)
1. A steel structure column base with a replaceable metal round bar energy dissipation damper is characterized by comprising a column body (1), a bracket top plate (2), an external stiffening rib (3), a metal round bar energy dissipation damper (4), a bracket bottom plate (6), a ball support, an anchoring device (9), and a ball support comprising a concave part (7) and a convex part (8);
the column body (1) is of a steel structure;
the bracket top plate (2) is arranged outside the cylinder (1) and is in welding contact with the cylinder (1), the bracket top plate (2) is positioned above the bracket bottom plate (6), and the distance between the bracket top plate and the bracket bottom plate is determined according to the length of the on-site metal round bar energy dissipation damper (4);
the bracket bottom plate (6) is arranged at the bottom of the column body (1) and is in welding contact with the column body (1); the bracket bottom plate (6) is a square plate, and the periphery of the bracket bottom plate is provided with a plurality of side arc-shaped notches (601) and angle arc-shaped notches (602);
an external stiffening rib (3) is welded between the bracket top plate (2) and the bracket bottom plate (6) outside the surrounding column body (1) for enhancing the stress stability of the bracket top plate (2) and the bracket bottom plate (6);
the upper end of the metal round bar energy dissipation damper (4) is connected with the bracket top plate (2) through a bolt, and the lower end of the metal round bar energy dissipation damper is connected with the anchoring device (9), so that a certain bending resistance bearing capacity is provided for the column body (1), the device increases the rotation capacity and the energy consumption capacity of a node, and is good in anti-seismic performance and convenient to disassemble and replace;
the ball seat comprises a concave part (7) and a convex part (8); the concave part (7) is provided with a spherical groove, the convex part (8) is provided with a spherical surface, and the concave part (7) and the convex part (8) can be mutually matched;
the bottom of the anchoring device (9) is embedded into concrete, and the upper end of the anchoring device is connected with the metal round bar energy dissipation damper (4) to provide anti-pulling force for the metal round bar energy dissipation damper (4).
2. The steel structure column foot with replaceable metal round bar energy dissipation damper as claimed in claim 1,
the metal round bar energy dissipation damper (4) is of a round steel pipe structure, and the metal round bar energy dissipation damper (4) comprises a metal round bar core rod (4-1), a metal sleeve (4-2), two filling guard flaps (4-4) and a damper bolt (4-3);
the metal round bar core rod (4-1) is a round steel bar and comprises an end threaded area (4-101), an end expanded area (4-102), a middle energy dissipation area (4-103) and middle convex ribs (4-105);
the metal sleeve (4-2) is a round steel pipe, the inner diameter of the metal sleeve is the same as the expanded area of the end part of the metal round bar core rod (4-1), the outer diameter is determined according to the stability requirement, and the middle part of the metal sleeve is provided with a plurality of threaded holes (4-201);
the damper bolt (4-3) is screwed into the threaded hole (4-201) and tightly props against the outer surface of the filling valve guard (4-4), so that the relative fixation of the positions of all components is realized;
the filling valve guard (4-4) is an arc-shaped steel plate, the radius of the inner surface of the filling valve guard is slightly larger than the outer diameter of the middle energy dissipation area (4-103) of the metal round bar core rod (4-1), the central angle of the filling valve guard is slightly smaller than 180 degrees, and a groove (4-401) is dug in the middle of the filling valve guard (4-4);
the filling guard flap (4-4) fills the space between the middle energy dissipation area (4-103) and the metal sleeve (4-2) and restricts the lateral deformation of the metal round bar core rod (4-1);
the metal round bar core rod (4-1) is made of low-yield-point steel and cut into a shape with an intermediate energy dissipation area (4-103) and ribs (4-105), the intermediate energy dissipation area (4-103) can yield first under the action of force, and the metal round bar core rod (4-1) is restrained by an external metal sleeve (4-2) so as to prevent the possible instability problem when the metal round bar core rod (4-1) is pressed.
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| EP4071313A1 (en) * | 2021-04-09 | 2022-10-12 | Ancotech Ag | Anchor element, anchoring system, structure and construction and energy dissipation method |
| CN113323485B (en) * | 2021-05-31 | 2022-08-26 | 重庆大学 | Column base node of bending damper with replaceable after-earthquake |
| CN114060452B (en) * | 2021-12-06 | 2023-07-21 | 哈尔滨工业大学 | Active and passive hybrid vibration isolator based on piezoelectric actuation |
| CN117721911A (en) * | 2023-09-11 | 2024-03-19 | 北京建筑大学 | Sleeve type flange connection modularized steel structure system |
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