CN112554361A - Assembled replaceable two-stage buckling-restrained energy-dissipation supporting component - Google Patents
Assembled replaceable two-stage buckling-restrained energy-dissipation supporting component Download PDFInfo
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- CN112554361A CN112554361A CN202011370933.1A CN202011370933A CN112554361A CN 112554361 A CN112554361 A CN 112554361A CN 202011370933 A CN202011370933 A CN 202011370933A CN 112554361 A CN112554361 A CN 112554361A
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- steel pipe
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- 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
Abstract
The invention discloses an assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component which comprises two-stage buckling-restrained energy-dissipation structures; the first-stage buckling-restrained energy dissipation structure comprises an inner square steel pipe, a plurality of first-stage oval steel pipes and a core steel plate; the second-stage buckling-restrained energy dissipation structure comprises an outer square steel pipe, a plurality of second-stage oval steel pipes and a piston steel pipe; the outer square steel pipe sleeve is arranged outside the inner square steel pipe, the inner square steel pipe divides the inside of the outer square steel pipe into an upper cavity and a lower cavity, a second-stage oval steel pipe is arranged in the upper cavity and the lower cavity, and a fixing hole is formed in one side, fixedly connected with the outer square steel pipe, of the second-stage oval steel pipe. The good hysteresis energy dissipation performance of the steel material which is pulled due to bending is reasonably utilized, so that the effect of twice energy dissipation is achieved, the effect of twice dampers can be achieved, and the defect that the rigidity is reduced too fast in the later period of once bending energy dissipation can be effectively overcome through the superposition of the rigidity after twice bending.
Description
Technical Field
The invention relates to a multistage energy dissipation brace in a building structure and a manufacturing method thereof, in particular to an assembly type replaceable two-stage buckling-restrained energy dissipation brace component.
Background
In the design of a building structure or the improvement of anti-seismic reinforcement, a support is a component for effectively improving the lateral stiffness of the structure, and a common steel support has the problem of buckling under pressure. Aiming at the problem of compression buckling of the traditional common steel support, a novel support form of a buckling restrained brace appears. However, the rigidity of the buckling-restrained brace is reduced more during yielding to cause overlarge displacement of a building structure, so that the structure generates overlarge interlayer displacement due to the fact that the rigidity is reduced too fast to cause damage to non-structural components and even components, great inconvenience is brought to post-earthquake repair, and particularly the damage is obvious during the action of a large earthquake.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention provides an assembled and replaceable two-stage buckling-restrained energy-dissipation brace aiming at the defects of the prior art.
The invention adopts the following technical scheme:
an assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component comprises two-stage buckling-restrained energy-dissipation structures; the first-stage buckling-restrained energy dissipation structure comprises an inner square steel pipe (1), a plurality of first-stage oval steel pipes (2) and a core steel plate (3); the cross section of the inner square steel pipe (1) is rectangular, two opposite surfaces of a core steel plate (3) parallel to the inner square steel pipe (1) are inserted into the inner square steel pipe (1), the interior of the square steel pipe (1) is divided into an upper space and a lower space, a first-stage oval steel pipe (2) is installed in the upper space and the lower space, fixing holes are formed in two opposite linear steel plates on the first-stage oval steel pipe (2), holes corresponding to the fixing holes of the first-stage oval steel pipe (2) are formed in the core steel plate (3) and the inner square steel pipe (1), and the core steel plate (3), the inner square steel pipe (1) and the first-stage oval steel pipe (2) are fixed together; the second-stage buckling-restrained energy dissipation structure comprises an outer square steel pipe (8), a plurality of second-stage oval steel pipes (22) and a piston steel pipe (6); the outer square steel pipe (8) is sleeved outside the inner square steel pipe (1), the inner square steel pipe (1) divides the inner part of the outer square steel pipe (8) into an upper cavity and a lower cavity, second-stage oval steel pipes (22) are mounted in the upper cavity and the lower cavity, the shapes and the sizes of the second-stage oval steel pipes (22) and the first-stage oval steel pipes (2) are the same, and the difference is that two opposite straight steel plates on the second-stage oval steel pipes (22) are respectively provided with a fixed hole and a movable hole (14); the fixing hole is seted up to one side that second level oval steel pipe (22) and foreign side steel pipe (8) linked firmly mutually, and be in the same place second level oval steel pipe (22) and foreign side steel pipe (8) are fixed through bolt (7), and activity hole (14) have been seted up to one side that second level oval steel pipe (22) and interior square steel pipe (1) are connected, can be in the relative slip of activity hole (14) within range through bolt (7) with second level oval steel pipe (22) and interior square steel pipe (1) installation together.
One end of the inner square steel pipe (1) is completely sealed, the other end of the inner square steel pipe is opened, and the completely sealed end is connected with a connecting end plate (12); the core steel plate (3) is inserted into the inner steel pipe (1) from one end of the opening, one end of the core steel plate (3) extends out of the inner steel pipe (1), the end is fixedly connected with another connecting end plate (12), the other end of the core steel plate (3) is located at one end, close to the inner steel pipe (1), of the inner steel pipe (1) and completely sealed, the core steel plate (3) is located at one end, fixedly connected with a steel pipe plug (4), of the inner steel pipe (1), and the section shape of the steel pipe plug (4) is the same as that of the inner steel pipe (1).
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that four side faces, contacting with an inner square steel pipe (1), of the outer portion of a steel pipe plug (4) are provided with lubricating coatings (5), the steel pipe plug (4) is inserted into the square steel pipe (1), then the lubricating coatings (5) are contacted with the inner wall of the square steel pipe (1), and the steel pipe plug (4) can freely slide.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that a piston steel pipe (6) is arranged at one end close to an opening of an inner square steel pipe (1) and inside an outer square steel pipe (8), the piston steel pipe (6) is fixedly connected with a core steel plate (3), the section shape of the piston steel pipe (6) is the same as that of the outer square steel pipe (8), two groups of piston stoppers (9) are arranged on the inner wall of one end of the outer square steel pipe (8), the piston steel pipe (6) is enclosed between the two groups of piston stoppers (9), and the piston steel pipe (6) can freely slide between the piston stoppers (9); piston fender (9) and the inboard open-ended one end of interior side steel pipe (1) of foreign side steel pipe (8) keep the certain distance, set up two sets of spacing fender (10) at the other end inner wall of outside steel pipe (8), set up one in the corresponding position of interior side steel pipe (1) and block (11), block and keep off (11) and be located between two sets of spacing fender (10), block and keep off (11) and can freely slide between two sets of spacing fender (10).
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the distance between the piston stopper (9) and the edge of the first-stage oval steel pipe (2) is L1The distance between the piston stopper (9) and the edge of the second-stage oval steel pipe (22) is L1；L1The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) is more than or equal to 1 time, so that energy consumption of blocking contact influence force and displacement hysteresis curves generated by the edges of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) and the piston stopper (9) when the core steel plate (3) drives the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) to be pulled is prevented.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the first-stage oval steel pipes (2) are spaced at an L distance from each other2The distance between the second-stage oval steel pipes (22) is L2；L2The diameter d of the arc-shaped part of the first oval steel pipe (2) is more than or equal to 1 time, so that mutual extrusion influence and energy consumption of a displacement hysteresis curve caused by asynchronous deformation of a certain first-stage oval steel pipe (2) or a certain second-stage oval steel pipe (22) during stress yielding can be effectively prevented.
The assembled replaceable two-stage buckling-restrained energy-dissipation supportThe mounting distance between the first-stage oval steel pipe (2) and the limiting stopper (10) is L3, and the mounting distance between the second-stage oval steel pipe (22) and the limiting stopper (10) is L3；L3The diameter d of the arc-shaped part of the oval steel pipe (2) is more than or equal to 1 time, so that the energy consumption of blocking contact influence force and displacement hysteresis curves generated by the edge of the second-stage oval steel pipe (22) and the limiting stopper (10) when the second-stage oval steel pipe (22) is driven by the inner square steel pipe (1) to be pressed can be effectively prevented.
The assembled replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the movable distance between the piston steel pipe (6) and the piston stopper (9) is L4(ii) a Also equal to the distance between the edge of the movable hole (14) and the center of the adjacent mounting bolt (7); l is4The yielding displacement of the first-stage oval steel pipe (2) which is more than or equal to 2 times and less than or equal to 4 times is required, so that the first-stage oval steel pipe (2) can be prevented from being damaged due to overlarge displacement deformation after the second-stage oval steel pipe (22) participates in stress, the energy consumption of the deformation of the first-stage oval steel pipe (2) can be effectively utilized, the participation stress of the second-stage oval steel pipe (22) between the inner square steel pipe (1) and the outer square steel pipe (8) can be effectively driven, and the effects of increasing the bearing capacity and rigidity of the first-stage oval steel pipe (2) between the inner square steel pipe (1) and the core steel plate (3) after yielding are achieved.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the distance between the opening end of the inner square steel pipe (1) and the longitudinal length direction of the inner side piston stopper (9) is L5；L5The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) is more than or equal to 0.25 time, so that the contact between the opening end of the inner square steel pipe (1) and the piston stopper (9) can be effectively prevented from blocking influence force and energy consumption of a displacement hysteresis curve due to installation deviation.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the distance between the edge of the first-stage oval steel pipe (2) and the steel pipe plug (4) is L6，L6The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) is more than or equal to (1), so that the contact influence and the energy consumption of a displacement hysteresis curve can be effectively prevented when the edge of the first-stage oval steel pipe (2) and the steel pipe plug (4) are out of synchronization in deformation.
The assembled replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the moving distance between the steel pipe plug (4) and the closed end of the inner square steel pipe (1) is L7；L7The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) is more than or equal to (1), so that the displacement deformation of the first-stage oval steel pipe (2) after yielding can be fully exerted, and the energy consumption of the force and the displacement hysteresis curve of the first-stage oval steel pipe (2) after yielding can be effectively realized.
The assembled replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the movable distance between the limiting block (10) and the clamping block (11) is L8，L8The yield displacement of the first-stage oval steel pipe (2) is more than or equal to (5) times and less than or equal to (7) times, so that the second-stage oval steel pipe (22) between the inner square steel pipe (1) and the outer square steel pipe (8) can be effectively prevented from being damaged due to excessive deformation after yielding, and the result that two-stage buckling energy consumption cannot be achieved is avoided.
The movable distance L between the limit stop (10) and the blocking stop (11)8Is larger than the movable distance between the piston steel pipe (6) and the piston stopper (9) and the distance between the edge of the movable hole (14) and the center of the adjacent mounting bolt (7) (namely L)8＞L4) And the second-stage elliptic steel pipe (2) is prevented from acting, the limit gear props against the blocking gear, the outer steel pipe is pushed away in the opposite direction, and the second-stage damping effect is counteracted.
The yield displacement of the second-stage oval steel pipe 22 is smaller than that of the first-stage oval steel pipe 1, so that the first-stage oval steel is prevented from being broken due to too large early deformation when the second-stage oval steel pipe is subjected to yield energy consumption.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that a gap between the opening end of the inner square steel pipe (1) and the transverse width direction of the piston stopper (9) is L9The clearance between the inner square steel tube (1) and the limiting block (10) in the transverse width direction is L9。
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that a gap between a lubricating coating (5) of a steel pipe plug (4) and an inner square steel pipe (1) is L10Between the lubricating coating (5) of the piston steel pipe (6) and the outer steel pipe (8)Has a gap of L10。
The assembled replaceable two-stage buckling-restrained energy-dissipation supporting component L11Is a transverse clearance between the piston stopper (9) and the connecting end plate (12), L12Is a gap between the blocking piece (11) and the outer steel pipe (8); l is9、L10、L11、L12Is greater than or equal to 5mm and less than or equal to 30mm, and avoids generating relative movement between contact-influencing components.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is formed by welding and assembling four steel plates, namely an inner square steel pipe (1) and an outer square steel pipe (8), wherein the upper steel plate and the lower steel plate are provided with bolt holes.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the ratio of the diameter of an arc of a first-stage oval steel pipe (2) or a second-stage oval steel pipe (22) to the thickness of the plate of the first-stage oval steel pipe or the second-stage oval steel pipe is 4-20, and the hysteresis curve in the range consumes energy well.
The assembled replaceable two-stage buckling-restrained energy-dissipation supporting component has the advantages that the ratio of the width of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) to the diameter of the arc of the first-stage oval steel pipe to the diameter of the arc of the second-stage oval steel pipe is greater than or equal to 0.5, the arc-shaped out-of-plane instability of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) can be effectively prevented, and.
The assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized in that the lubricating coating (5) is made of polytetrafluoroethylene or nano onion carbon lubricating wear-resistant material.
The connecting end plates with the mounting holes at two sides are connected with a building structure to form a lateral force resistance damping energy dissipation system, when the assembled and replaceable two-stage buckling-restrained energy dissipation support is pulled or pressed, the connecting end plates at two ends respectively drive the core steel plate and the combined inner square steel pipe to generate relative sliding in a gap, and simultaneously drive the arc section of the first-stage oval steel pipe connected between the core steel plate and the inner square steel pipe of the external combined inner square steel pipe to generate displacement, so that the arc section of the first-stage oval steel pipe is bent and can generate yielding energy dissipation;
when the assembled and replaceable two-stage buckling-restrained energy-dissipation brace continues to be pulled or pressed, the core steel plate and the combined inner steel tube generate relative sliding in the gap which is larger than the movable distance between the piston steel tube and the piston stopper and is also larger than the distance between the edge of the movable hole and the center of the adjacent mounting bolt, the combined outer steel tube and the combined inner steel tube are driven to generate relative sliding in the gap, simultaneously drives the arc section of the second-stage oval steel pipe connected between the combined inner square steel pipe and the combined outer square steel pipe to generate displacement, so that the arc section of the second-stage oval steel pipe is bent and generates yield energy consumption, the conversion reasonably utilizes the good hysteresis energy consumption performance of the steel material which is pulled due to bending, thereby not only achieving the effect of twice energy consumption, but also playing the role of twice dampers, and effectively solving the defect of too fast reduction of the later rigidity of once bending energy consumption through the superposition of the rigidity after twice bending. The two-stage rigidity, deformation and two-stage energy consumption capability of the support member can be adjusted by adjusting the length of the movable hole 14, the number and width of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22 and the ratio of the circular arc diameter of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22 to the plate thickness of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22.
Drawings
FIG. 1 is a schematic view of an assembled and replaceable two-stage buckling-restrained energy-dissipating support member according to the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view C-C of FIG. 1;
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;
FIG. 6 is a cross-sectional view E-E of FIG. 1;
FIG. 7 is a sectional view F-F of FIG. 1;
FIG. 8 is a sectional view taken along line G-G of FIG. 1;
FIG. 9 is a sectional view taken along line H-H of FIG. 1;
FIG. 10 is a cross-sectional view taken along line I-I of FIG. 1;
FIG. 11 is a sectional view taken along line J-J of FIG. 1;
FIG. 12 is an enlarged view of the first-stage oval steel pipe 2 of FIG. 1;
FIG. 13 is an enlarged view of the second stage oval steel tube 22 of FIG. 1;
FIG. 14 is a sectional view of the movable hole K-K of the second-stage oval steel tube 22 shown in FIG. 1;
FIG. 15 is a sectional view of bolt holes L-L of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22 shown in FIG. 1;
in the figure: 1. the steel pipe comprises an inner square steel pipe, 2, a first-stage oval steel pipe, 22, a second-stage oval steel pipe, 3, a core steel plate, 4, a steel pipe plug, 5, a lubricating coating, 6, a piston steel pipe, 7, a bolt, 8, an outer square steel pipe, 9, a piston stopper, 10, a limiting stopper, 11, a blocking stopper, 12, a connecting end plate, 13, a side gap, 14 and a movable hole.
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1 to 15, a fabricated replaceable two-stage buckling restrained energy dissipating support member includes a two-stage buckling restrained energy dissipating structure; the first-stage buckling-restrained energy dissipation structure comprises an inner square steel pipe 1, a first-stage oval steel pipe 2, a core steel plate 3, a steel pipe plug 4, a lubricating coating 5 and a connecting end plate 12; the cross section of the inner square steel pipe 1 is rectangular, the core steel plate 3 is inserted into the square steel pipe 1 in parallel with two opposite surfaces of the inner square steel pipe 1 to divide the inside of the square steel pipe 1 into an upper space and a lower space, preferably, the core steel plate 3 is positioned at the central position of the inner square steel pipe 1 to divide the inside of the square steel pipe 1 into an upper space and a lower space which are equal, the upper space and the lower space are both provided with the first-stage oval steel pipe 2, the first-stage oval steel pipe 2 is formed by combining two opposite arc-shaped steel plates and two opposite linear steel plates, the overall cross section is approximately oval, the oval cross section of the first-stage oval steel pipe 2 is fixed in parallel with the axis of the inner square steel pipe 1, the two opposite linear steel plates on the first-stage oval steel pipe 2 are both provided with fixing holes, the core steel plate 3 and the inner square steel pipe 1 are provided with, The inner square steel pipe 1 and the first-stage oval steel pipe 2 are fixed together;
one end of the inner square steel tube 1 is completely sealed, the other end of the inner square steel tube is opened, and the completely sealed end is connected with a connecting end plate 12; the core steel plate 3 is inserted into the inner steel pipe 1 from one end of the opening, one end of the core steel plate 3 extends out of the inner steel pipe 1, the end is fixedly connected with the other connecting end plate 12, the other end of the core steel plate 3 is positioned at one end, close to the completely sealed inner steel pipe 1, of the inner steel pipe 1, the end, positioned inside the inner steel pipe 1, of the core steel plate 3 is fixedly connected with a steel pipe plug 4, the section shape of the steel pipe plug 4 is the same as that of the inner steel pipe 1, lubricating coatings 5 are arranged on four side faces, contacting with the inner steel pipe 1, of the outer portion of the steel pipe plug 4, the lubricating coatings 5 are in contact with the inner wall of the square steel pipe 1 after the steel pipe plug 4 is inserted;
the second-stage buckling-restrained energy dissipation structure comprises an outer square steel pipe 8, a second-stage oval steel pipe 22 and a piston steel pipe 6; the outer square steel pipe 8 is sleeved outside the inner square steel pipe 1, the inner square steel pipe 1 divides the inside of the outer square steel pipe 8 into an upper cavity and a lower cavity, a second-stage oval steel pipe 22 is installed in each of the upper cavity and the lower cavity, the shape and the size of the second-stage oval steel pipe 22 are the same as those of the first-stage oval steel pipe 2, and the difference is that a fixed hole and a movable hole 14 are respectively formed in two opposite linear steel plates on the second-stage oval steel pipe 22; the second-stage oval steel pipe 22 and the outer steel pipe 8 are fixedly connected through a bolt 7, the second-stage oval steel pipe 22 and the outer steel pipe 8 are fixed together, the movable hole 14 is formed in one side, connected with the inner steel pipe 1, of the second-stage oval steel pipe 22, and the inner steel pipe 1 are mounted together through the bolt 7 and can slide relatively in the range of the movable hole 14.
A piston steel pipe 6 is arranged at one end close to the opening of the inner steel pipe 1 and inside the outer steel pipe 8, the piston steel pipe 6 is fixedly connected with the core steel plate 3, the section shape of the piston steel pipe 6 is the same as that of the outer steel pipe 8, four side faces, contacting with the outer steel pipe 8, of the outer part of the piston steel pipe 6 are also provided with lubricating coatings 5, two groups of piston stoppers 9 are arranged on the inner wall of one end of the outer steel pipe 8, the piston steel pipe 6 is enclosed between the two groups of piston stoppers 9, and the piston steel pipe 6 can freely slide between the piston stoppers 9; the piston stopper 9 inside the outer steel pipe 8 is kept at a predetermined distance (L) from the open end of the inner steel pipe 15) The inner wall of the other end of the outer steel pipe 8 is provided with two groups of limiting blocks 10, the corresponding position of the inner steel pipe 1 is provided with a blocking block 11, the blocking block 11 is positioned between the two groups of limiting blocks 10, and the blocking block 11 can freely slide between the two groups of limiting blocks 10。
Referring to fig. 1, the arc diameters of the first-stage oval steel tube 2 and the second-stage oval steel tube 22 are d, and the distance between the piston stopper 9 and the edge of the first-stage oval steel tube 2 is L1The distance between the piston baffle 9 and the edge of the second-stage oval steel pipe 22 is L1；L1The diameter d of the arc-shaped part of the first-stage oval steel pipe 2 is more than or equal to 1 time, so that the contact impact force and the energy consumption of a displacement hysteresis curve generated by the edge of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 and the piston stopper 9 when the core steel plate 3 drives the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 to be pulled are prevented.
The distance between the first-stage oval steel pipes 2 is L2The distance between the second-stage oval steel pipes 22 is L2；L2The diameter d of the arc-shaped part of the first-stage oval steel pipe 2 is more than or equal to 1 time, so that mutual extrusion influence force and energy consumption of a displacement hysteresis curve caused by asynchronous deformation of a certain first-stage oval steel pipe 2 or a certain second-stage oval steel pipe 22 during stress yielding can be effectively prevented.
The installation distance between the first-stage oval steel pipe 2 and the limit stop 10 is L3The installation distance between the second-stage oval steel pipe 22 and the limit stop 10 is L3；L3The diameter d of the arc-shaped part of the oval steel pipe 2 is more than or equal to 1 time, so that the contact impact force and the energy consumption of a displacement hysteresis curve generated by the edge of the second-stage oval steel pipe 22 and the limiting stopper 10 when the second-stage oval steel pipe 22 is driven by the inner square steel pipe 1 to be pressed can be effectively prevented.
The movable distance between the piston steel pipe 6 and the piston stopper 9 is L4(ii) a Also equal to the distance between the edge of the active hole 14 and the center of the adjacent mounting bolt 7; l is4The yield displacement of the first-stage oval steel pipe 2 which is more than or equal to 2 times and less than or equal to 4 times is required, so that the first-stage oval steel pipe 2 can be prevented from being damaged due to overlarge displacement deformation after the second-stage oval steel pipe 22 participates in stress, the energy consumption of the deformation of the first-stage oval steel pipe 2 can be effectively utilized, the participation stress of the second-stage oval steel pipe 22 between the inner square steel pipe 1 and the outer square steel pipe 8 can be effectively driven, and the purpose of increasing the first-stage oval steel pipe 22 between the inner square steel pipe 1 and the core steel plate 3The bearing capacity and the rigidity of the oval steel pipe 2 after yielding.
The distance between the opening end of the inner square steel tube 1 and the longitudinal (i.e. horizontal) length direction of the inner piston stopper 9 is L5；L5The diameter d of the arc-shaped part of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 is more than or equal to 0.25 time, so that the contact blocking influence force between the opening end of the inner square steel pipe 1 and the piston stopper 9 and the energy consumption of a displacement hysteresis curve can be effectively prevented due to installation deviation.
The distance between the edge of the first-stage oval steel pipe 2 and the steel pipe plug 4 is L6The distance between the edge of the second-stage oval steel pipe 22 and the steel pipe plug 4 is L6；L6The diameter d of the arc-shaped part of the first-stage oval steel pipe 2 is more than or equal to 1 time, so that the energy consumption of contact influence and a displacement hysteresis curve can be effectively prevented when the edge of the first-stage oval steel pipe 2 and the steel pipe plug 4 are out of synchronization in deformation.
The moving distance between the steel pipe plug 4 and the closed end of the inner square steel pipe 1 is L7；L7The diameter d of the arc-shaped part of the first-stage oval steel pipe 2 is more than or equal to 1 time, so that the displacement deformation of the first-stage oval steel pipe 2 after yielding can be fully exerted, and the energy consumption of the force and displacement hysteresis curve of the first-stage oval steel pipe 2 after yielding can be effectively realized.
The movable distance between the limit stop 10 and the blocking stop 11 is L8，L8The yield displacement of the first-stage oval steel pipe 2 is more than or equal to 5 times and less than or equal to 7 times, so that the second-stage oval steel pipe 22 between the inner square steel pipe 1 and the outer square steel pipe 8 can be effectively prevented from being damaged due to excessive deformation after yielding, and the result that two-stage buckling energy consumption cannot be achieved is avoided.
Preferably, the movable distance L between the limit stop 10 and the blocking stop 118Is larger than the movable distance between the piston steel pipe 6 and the piston stopper 9 and the distance between the edge of the movable hole 14 and the center of the adjacent mounting bolt 7 (namely L)8＞L4) And the limit stop is prevented from propping against the blocking stop before the second-stage oval steel pipe 2 acts, the outer steel pipe is pushed away in the opposite direction, and the second-stage damping effect is counteracted.
Preferably, the yield displacement of the second-stage oval steel pipe 22 is smaller than that of the first-stage oval steel pipe 1, so that the first-stage oval steel is prevented from being broken due to too large early deformation when the second-stage oval steel pipe is subjected to yield energy consumption.
The gap between the opening end of the inner square steel tube 1 and the transverse width direction of the piston stopper 9 is L9The gap between the inner square steel tube 1 and the limit stop 10 in the transverse width direction (i.e. the vertical direction) is L9；
The clearance between the lubricating coating 5 of the steel pipe plug 4 and the inner square steel pipe 1 is L10The clearance between the lubricating coating 5 of the piston steel pipe 6 and the outer steel pipe 8 is L10；
L11Is the transverse clearance, L, of the piston stopper 9 and the connecting end plate 1212A gap between the stopper 11 and the outer steel pipe 8, L1-L12Are not 0.
Said gap L9、L10、L11、L12And the side gap 13 is more than or equal to 5mm and less than or equal to 30mm, so that the relative movement between the components influenced by contact is avoided.
The calculation formula of the yield bearing capacity and the yield displacement of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 is as follows:
in the formula: d is the diameter of the circular arc positions of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22, b is the width of the circular arc positions of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22, t is the thickness of the circular arc positions of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22, and f isyYield strength of the steel of the first-stage oval steel tube 2 and the second-stage oval steel tube 22, E elastic modulus of the steel of the first-stage oval steel tube 2 and the second-stage oval steel tube 22, FyYield bearing capacity, delta, of the first stage oval steel tube 2, the second stage oval steel tube 22yThe yield displacement of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22.
Certain gaps are formed between the steel pipe plug 4 and the inner wall of the inner square steel pipe 1 and between the piston steel pipe 6 and the inner wall of the outer square steel pipe 8, so that the atmosphere on the left side and the right side of the steel pipe plug 4 and the atmosphere on the right side of the piston steel pipe 6 are communicated, and the steel pipe plug 4 and the piston steel pipe 6 can slide freely;
the inner square steel pipe 1 and the outer square steel pipe 8 are formed by welding and assembling four steel plates, wherein the upper steel plate and the lower steel plate are provided with bolt holes;
in order to enhance the stability of the steel pipe, the ratio of the arc diameter of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 to the plate thickness of the steel pipe is 4-20, and the hysteresis curve in the range has good energy consumption;
the ratio of the width of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 (namely, the distance between the left side and the right side of the oval steel pipe in fig. 3) to the arc diameter of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 is more than or equal to 0.5, so that the arc-shaped out-of-plane instability of the first-stage oval steel pipe 2 or the second-stage oval steel pipe 22 can be effectively prevented.
The lubricating coating 5 is a polytetrafluoroethylene or nano onion carbon lubricating wear-resistant material;
the connecting end plates with the mounting holes at two sides are connected with a building structure to form a lateral force resistance damping energy dissipation system, when the assembled and replaceable two-stage buckling-restrained energy dissipation support is pulled or pressed, the connecting end plates at two ends respectively drive the core steel plate and the combined inner square steel pipe to generate relative sliding in a gap, and simultaneously drive the arc section of the first-stage oval steel pipe connected between the core steel plate and the inner square steel pipe of the external combined inner square steel pipe to generate displacement, so that the arc section of the first-stage oval steel pipe is bent and can generate yielding energy dissipation; when the assembled and replaceable two-stage buckling-restrained energy-dissipation brace continues to be pulled or pressed, the core steel plate and the combined inner steel tube generate relative sliding in the gap which is larger than the movable distance between the piston steel tube and the piston stopper and is also larger than the distance between the edge of the movable hole and the center of the adjacent mounting bolt, the combined outer steel tube and the combined inner steel tube are driven to generate relative sliding in the gap, simultaneously drives the arc section of the second-stage oval steel pipe connected between the combined inner square steel pipe and the combined outer square steel pipe to generate displacement, so that the arc section of the second-stage oval steel pipe is bent and generates yield energy consumption, the conversion reasonably utilizes the good hysteresis energy consumption performance of the steel material which is pulled due to bending, thereby not only achieving the effect of twice energy consumption, but also playing the role of twice dampers, and effectively solving the defect of too fast reduction of the later rigidity of once bending energy consumption through the superposition of the rigidity after twice bending. The two-stage rigidity, deformation and two-stage energy consumption capability of the support member can be adjusted by adjusting the length of the movable hole 14, the number and width of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22 and the ratio of the circular arc diameter of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22 to the plate thickness of the first-stage oval steel pipe 2 and the second-stage oval steel pipe 22.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. An assembled and replaceable two-stage buckling-restrained energy-dissipation supporting component is characterized by comprising two-stage buckling-restrained energy-dissipation structures; the first-stage buckling-restrained energy dissipation structure comprises an inner square steel pipe (1), a plurality of first-stage oval steel pipes (2) and a core steel plate (3); the cross section of the inner square steel pipe (1) is rectangular, two opposite surfaces of a core steel plate (3) parallel to the inner square steel pipe (1) are inserted into the inner square steel pipe (1), the interior of the square steel pipe (1) is divided into an upper space and a lower space, a first-stage oval steel pipe (2) is installed in the upper space and the lower space, fixing holes are formed in two opposite linear steel plates on the first-stage oval steel pipe (2), holes corresponding to the fixing holes of the first-stage oval steel pipe (2) are formed in the core steel plate (3) and the inner square steel pipe (1), and the core steel plate (3), the inner square steel pipe (1) and the first-stage oval steel pipe (2) are fixed together; the second-stage buckling-restrained energy dissipation structure comprises an outer square steel pipe (8), a plurality of second-stage oval steel pipes (22) and a piston steel pipe (6); the outer square steel pipe (8) is sleeved outside the inner square steel pipe (1), the inner square steel pipe (1) divides the inner part of the outer square steel pipe (8) into an upper cavity and a lower cavity, second-stage oval steel pipes (22) are mounted in the upper cavity and the lower cavity, the shapes and the sizes of the second-stage oval steel pipes (22) and the first-stage oval steel pipes (2) are the same, and the difference is that two opposite straight steel plates on the second-stage oval steel pipes (22) are respectively provided with a fixed hole and a movable hole (14); the fixing hole is seted up to one side that second level oval steel pipe (22) and foreign side steel pipe (8) linked firmly mutually, and be in the same place second level oval steel pipe (22) and foreign side steel pipe (8) are fixed through bolt (7), and activity hole (14) have been seted up to one side that second level oval steel pipe (22) and interior square steel pipe (1) are connected, can be in the relative slip of activity hole (14) within range through bolt (7) with second level oval steel pipe (22) and interior square steel pipe (1) installation together.
2. The fabricated replaceable two-stage buckling restrained energy dissipating support member as claimed in claim 1, wherein the inner square steel tube (1) is completely sealed at one end and open at the other end, and the completely sealed end is connected with a connection end plate (12); the core steel plate (3) is inserted into the inner steel pipe (1) from one end of the opening, one end of the core steel plate (3) extends out of the inner steel pipe (1), the end is fixedly connected with another connecting end plate (12), the other end of the core steel plate (3) is located at one end, close to the inner steel pipe (1), of the inner steel pipe (1) and completely sealed, the core steel plate (3) is located at one end, fixedly connected with a steel pipe plug (4), of the inner steel pipe (1), and the section shape of the steel pipe plug (4) is the same as that of the inner steel pipe (1).
3. The fabricated and replaceable two-stage buckling restrained energy dissipation brace member as recited in claim 2, wherein four sides of the outer portion of the steel pipe plug (4) contacting with the inner square steel pipe (1) are provided with lubricating coatings (5), after the steel pipe plug (4) is inserted into the square steel pipe (1), the lubricating coatings (5) contact with the inner wall of the square steel pipe (1), and the steel pipe plug (4) can slide freely.
4. The assembled and replaceable two-stage buckling restrained energy dissipation supporting component as claimed in claim 1, wherein a piston steel pipe (6) is arranged at one end close to the opening of the inner square steel pipe (1) and inside the outer square steel pipe (8), the piston steel pipe (6) is fixedly connected with the core steel plate (3), the cross-sectional shape of the piston steel pipe (6) is the same as that of the outer square steel pipe (8), two groups of piston stoppers (9) are arranged on the inner wall of one end of the outer square steel pipe (8), the piston steel pipe (6) is enclosed between the two groups of piston stoppers (9), and the piston steel pipe (6) can freely slide between the piston stoppers (9); piston fender (9) and the inboard open-ended one end of interior side steel pipe (1) of foreign side steel pipe (8) keep the certain distance, set up two sets of spacing fender (10) at the other end inner wall of outside steel pipe (8), set up card fender (11) in the corresponding position of interior side steel pipe (1), block and keep off (11) and be located between two sets of spacing fender (10), block and keep off (11) and can freely slide between two sets of spacing fender (10).
5. The fabricated replaceable two-stage buckling restrained brace member according to claim 1, wherein the distance between the piston stopper (9) and the edge of the first-stage oval steel tube (2) is L1The distance between the piston stopper (9) and the edge of the second-stage oval steel pipe (22) is L1；L1The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) is more than or equal to 1 time, so that energy consumption of blocking contact influence force and displacement hysteresis curves generated by the edges of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) and the piston stopper (9) when the core steel plate (3) drives the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) to be pulled is prevented.
6. Fabricated replaceable two-stage buckling-restrained energy-dissipating support member as claimed in claim 1, wherein the first-stage oval steel tubes (2) are spaced apart from each other by a distance L2The distance between the second-stage oval steel pipes (22) is L2；L2The diameter d of the arc-shaped part of the first oval steel pipe (2) is more than or equal to 1 time, so that mutual extrusion influence and energy consumption of a displacement hysteresis curve caused by asynchronous deformation of a certain first-stage oval steel pipe (2) or a certain second-stage oval steel pipe (22) during stress yielding can be effectively prevented.
7. The fabricated replaceable two-stage buckling restrained energy dissipating support member as claimed in claim 1, wherein the mounting distance between the first-stage oval steel tube (2) and the limit stop (10) is L3The installation distance between the second-stage oval steel pipe (22) and the limiting block (10) is L3；L3The diameter d of the arc-shaped part of the oval steel pipe (2) is more than or equal to (1) times, so that the inner square steel pipe can be effectively prevented(1) When the second-stage oval steel pipe (22) is driven to be pressed, the edge of the second-stage oval steel pipe (22) and the limiting stopper (10) generate energy consumption for blocking contact influence force and displacement hysteresis curves.
8. The fabricated replaceable two-stage buckling restrained energy dissipating support member as claimed in claim 1, wherein the movable distance between the piston steel tube (6) and the piston stopper (9) is L4(ii) a Also equal to the distance between the edge of the movable hole (14) and the center of the adjacent mounting bolt (7); l is4The yielding displacement of the first-stage oval steel pipe (2) which is more than or equal to 2 times and less than or equal to 4 times is required, so that the first-stage oval steel pipe (2) can be prevented from being damaged due to overlarge displacement deformation after the second-stage oval steel pipe (22) participates in stress, the energy consumption of the deformation of the first-stage oval steel pipe (2) can be effectively utilized, the participation stress of the second-stage oval steel pipe (22) between the inner square steel pipe (1) and the outer square steel pipe (8) can be effectively driven, and the effects of increasing the bearing capacity and rigidity of the first-stage oval steel pipe (2) between the inner square steel pipe (1) and the core steel plate (3) after yielding are achieved.
9. The fabricated replaceable two-stage buckling restrained brace member according to claim 1, wherein the distance between the open end of the inner square steel tube (1) and the longitudinal length direction of the inner piston stopper (9) is L5；L5The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) or the second-stage oval steel pipe (22) is more than or equal to 0.25 time, so that the contact between the opening end of the inner square steel pipe (1) and the piston stopper (9) can be effectively prevented from blocking influence force and energy consumption of a displacement hysteresis curve due to installation deviation.
10. The fabricated replaceable two-stage buckling restrained brace member of claim 1, wherein the edge of the first stage oval steel tube (2) is spaced L from the steel tube plug (4)6，L6The diameter d of the arc-shaped part of the first-stage oval steel pipe (2) is more than or equal to 1 time, so that the energy consumption of contact influence and a displacement hysteresis curve can be effectively prevented when the edge of the first-stage oval steel pipe (2) and the steel pipe plug (4) are deformed and are asynchronous.
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