CN111255255A - Anti-seismic reinforcing method for frame structure building - Google Patents
Anti-seismic reinforcing method for frame structure building Download PDFInfo
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- CN111255255A CN111255255A CN202010061484.6A CN202010061484A CN111255255A CN 111255255 A CN111255255 A CN 111255255A CN 202010061484 A CN202010061484 A CN 202010061484A CN 111255255 A CN111255255 A CN 111255255A
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- frame structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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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
- E04H9/025—Structures with concrete columns
-
- 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
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
Abstract
The invention provides a frame structure building earthquake-resistant reinforcing method, which comprises the steps of evaluating the floor lateral displacement uneven coefficient and the structural performance of a frame structure building to obtain an evaluation result; determining the arrangement positions and the arrangement quantity of the strong ridge units on the frame structure building according to the evaluation result, and drawing a construction drawing; and arranging the strong ridge units on the frame structure building according to the construction drawing to finish steps of seismic reinforcement and the like of the frame structure building. Can effectively control the lateral deformation of frame construction building through setting up strong spine unit, effectively avoid the weak layer to appear in the structure, can realize expecting the destruction mechanism, strong spine unit has that the plane overall arrangement is nimble simultaneously, the construction is convenient, easily popularizes and applies.
Description
Technical Field
The invention relates to a building reinforcing method, in particular to a frame structure building earthquake-resistant reinforcing method.
Background
In various concrete buildings, a frame structure is one of the most adopted structural forms at present, and the existing earthquake damage shows that the frame structure building is usually concentrated in structural damage due to non-uniform lateral deformation of floors to form a weak layer, and under the action of strong earthquake, the phenomenon that the lateral residual deformation of the structure is too large and exceeds the maintenance value or even the structure collapses easily occurs, so that the expected structural damage mechanism is difficult to realize.
In order to solve the problems, scholars at home and abroad propose that the lateral deformation of a frame structure building is controlled by adopting a swinging wall technology, so that the floor damage concentration caused by the uncertainty of earthquake input and the uncertainty of the performance of the structure is avoided, and an expected damage mechanism is realized. However, the swing wall is heavy in weight, inflexible in spatial arrangement, high in cost, high in construction difficulty, long in construction period, and severely restricts the popularization and application of the swing wall.
In view of the above, the applicant has conducted intensive research on a method for seismic reinforcement of a frame structure building, and has developed the present application.
Disclosure of Invention
The invention aims to provide a frame structure building earthquake-resistant reinforcing method which can realize an expected failure mechanism and is easy to popularize and apply.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for seismic reinforcement of a frame structure building comprises the following steps:
s1, evaluating the floor lateral displacement uneven coefficient and the structure performance of the frame structure building to obtain an evaluation result;
s2, determining the arrangement positions and the arrangement quantity of the strong ridge units on the frame structure building according to the evaluation result, and drawing a construction drawing;
s3, arranging the strong ridge units on the frame structure building according to the construction drawing to finish seismic reinforcement of the frame structure building;
the strong ridge unit comprises at least two vertically arranged strong ridge trusses fixedly connected or integrally connected to the frame structure building and energy dissipation elements connected between the bottom of each strong ridge truss and the foundation.
As an improvement of the present invention, the strong-ridge truss includes a square frame and support frames respectively located at the upper and lower ends of the square frame, the square frame includes a cross bar and an upright bar which enclose into a square structure, and a first diagonal brace connected to one of the diagonal bars of the square structure, the support frame includes a second support bar located on the same straight line with one of the upright bars and a second diagonal brace having one end fixedly connected to the second support bar, and the end of the second support bar which is not connected to the second diagonal brace and the end of the second diagonal brace which is not connected to the second support bar are respectively fixedly connected to the corresponding corners of the square frame.
As an improvement of the invention, in the same strong ridge truss, two of the supporting frames are symmetrically arranged.
As an improvement of the present invention, the strong ridge truss further includes a first support rod disposed parallel to the second support rod, the upper end of the first support rod is fixedly connected to a position where the square frame is connected to the second diagonal support rod located relatively below, and the lower end of the first support rod is connected to the foundation through the energy dissipation element.
As an improvement of the present invention, the vertical rod, the cross rod, the first support rod and/or the second support rod are/is a beam or a column in the frame structure building.
As an improvement of the invention, in the same strong ridge truss, there are more than two square frames, each square frame is connected from top to top in sequence, and two adjacent square frames share the same cross bar.
As a modification of the present invention, in step S3, two of the strong spine units arranged perpendicular to each other are disposed at each of the disposition positions to form a single-limb type strong spine structure.
As a modification of the present invention, in step S3, four evenly distributed strong ridge units are disposed at each of the disposition positions to form an integral strong ridge structure.
As a modification of the present invention, in step S3, two interconnected strong spine units are disposed between two adjacent arrangement positions to form a coupled strong spine structure.
By adopting the technical scheme, the invention has the following beneficial effects:
1. can effectively control the lateral deformation of frame construction building through setting up strong spine unit, effectively avoid the weak layer to appear in the structure, can realize expecting the destruction mechanism, strong spine unit has that the plane overall arrangement is nimble simultaneously, the construction is convenient, easily popularizes and applies.
2. The beam or the upright post which originally exists in the frame structure building is directly adopted as the component part of the strong spine unit, so that the construction cost is relatively low, the weight is favorably reduced, the construction difficulty is relatively low, and the construction period is relatively short.
3. Through setting up energy dissipation component, play first defence line effect, realize that energy dissipation component concentrates the bucking power consumption, effectively promote the whole anti-seismic performance of structure and shake back structure function quick recovery ability.
4. The strong ridge units are flexible in arrangement, can be arranged in two directions, are obvious in anti-seismic reinforcing effect and convenient and fast to construct, can be used for improving the anti-seismic performance of the existing frame structure, can also be used in a newly-built frame structure, has wide application space in the field of anti-seismic and disaster reduction, and can be used for adjusting the reserve strength of the whole structural components, so that the structure has better energy consumption capability.
Drawings
FIG. 1 is a schematic diagram of a first type of strong ridge unit provided in the examples;
FIG. 2 is a schematic structural diagram of a second strong ridge unit provided in the embodiment;
FIG. 3 is a schematic structural diagram of a third strong ridge unit provided in the embodiment;
FIG. 4 is a schematic view showing a deformed state of the reinforced frame structure building according to the embodiment;
FIG. 5 is a first bi-directional reinforcement plane arrangement provided in the examples;
FIG. 6 is a second bi-directional reinforcement plane arrangement provided in the examples;
fig. 7 is a third bi-directional reinforcement plane layout provided in the example.
The designations in the figures correspond to the following:
10-frame construction building; 20-strong spine units;
21-a strong spine truss; 22-energy consuming elements;
23-a square frame; 24-a support frame;
25-a cross-bar; 26-erecting a rod;
27-a first diagonal strut; 28-a second support bar;
29-a second diagonal strut; 30-a foundation;
40-first support bar.
Detailed Description
The invention will be further described with reference to specific examples:
the embodiment provides an earthquake-resistant reinforcing method for a frame structure building based on concepts of a controlled swing structure system, damage control, replacement and the like, the method can be used for an existing frame structure building and a newly-built frame structure building, the number of layers of the frame structure building can be determined according to actual needs, in the embodiment, a four-layer frame structure building is taken as an example for description, and the bottom of the four-layer frame structure building is provided with a foundation as the same as that of a conventional frame structure building.
As shown in fig. 1 to 5, the method for seismic reinforcement of a frame structure building provided by the present embodiment includes the following steps:
and S1, evaluating the floor lateral displacement unevenness coefficient and the structural performance of the frame structure building 10 to obtain an evaluation result, wherein the specific evaluation method is a conventional method and is not the focus of the embodiment, and the detailed description is omitted here.
And S2, determining the arrangement positions and the arrangement number of the strong ridge units 20 on the frame structure building 10 according to the evaluation result, and drawing a construction drawing.
And S3, arranging the strong ridge units 20 on the frame structure building 10 according to the construction drawing, and completing the seismic reinforcement of the frame structure building. The structure of the three strong ridge units 20 provided in this embodiment, the first structure of the strong ridge unit 20 is shown in fig. 1, and includes a vertically arranged strong ridge truss 21 fixedly or integrally connected to the frame structure building 10, and an energy dissipation element 22 disposed between the bottom of the strong ridge truss 21 and the foundation 30, wherein the energy dissipation element 22 may be a conventional building shock absorption energy dissipation element, and is not the focus of this embodiment and will not be described in detail herein; the strong ridge truss 21 comprises a square frame 23 and two support frames 24 respectively positioned at the upper end and the lower end of the square frame 23, namely the two support frames 24 are arranged symmetrically in the same strong ridge truss 21, and each support frame 24 and the square frame 23 are positioned on the same plane, wherein the square frame 23 comprises a cross bar 25 and an upright bar 26 which enclose into a square structure, and a first diagonal brace 27 connected to one group of diagonal angles of the square structure, namely each square frame 23 comprises two cross bars 25, two upright bars 26 and a first diagonal brace 27; each square frame 23 corresponds to one floor of the frame structure building, specifically, in the same strong-ridge truss 21, more than two square frames 23 are provided, the square frames 23 are connected from top to top in sequence, and two adjacent square frames 23 share the same cross bar 25. Preferably, the arrangement directions of the first diagonal braces 27 in the two adjacent square frames 23 are different from each other, so that the rigidity is better. The supporting frame 24 includes a second supporting rod 28 and a second diagonal supporting rod 29, wherein the second supporting rod 28 is located on the same straight line with one of the vertical rods 26, and one end of the second diagonal supporting rod 29 is fixedly connected to the second supporting rod 28, wherein one end of the second supporting rod 28, which is not connected to the second diagonal supporting rod 29, and one end of the second diagonal supporting rod 29, which is not connected to the second supporting rod 28, are respectively fixedly connected to corresponding corners of the square frame 23, and form a right triangle structure together with the cross rod 25 of the square frame 23. Preferably, the first strong spine unit 20 further comprises a first supporting rod 40 disposed in parallel with the second supporting rod 28, wherein the first supporting rod 40 is fixedly connected at an upper end thereof to the lowermost square frame 23 at a position where it is connected to the second diagonal supporting rod 29, and at a lower end thereof to the foundation 30 through the energy dissipation member 22.
The second type of strong ridge unit 20 has a structure as shown in fig. 2, which corresponds to two oppositely arranged first type of strong ridge units. A third type of high-strength ridge unit 20 is shown in fig. 3, and comprises at least two vertically arranged high-strength ridge trusses 21 fixedly or integrally connected to the frame structure building 10, and energy-consuming elements 22 connected between the high-strength ridge trusses 21. It should be noted that, no matter what kind of structure of the spine strengthening unit, the upright bars 26, the cross bars 25, the first support bars 28 and/or the first support bars 40 may be cross beams or upright columns in the frame structure building 10, that is, the original cross beams or upright columns may be utilized by transformation, and the spine strengthening unit 20 arranged vertically is formed by adding diagonal support bars, so that not only the manufacturing cost is relatively low, but also the weight is favorably reduced, the construction difficulty is relatively low, and the construction period is relatively short. In addition, each rod member mentioned in the present embodiment is a reinforced concrete member.
In addition, more than two strong ridge units 20 can be arranged at the arrangement position of each strong ridge unit 20 to form a bidirectional reinforced structure, and the embodiment provides three typical bidirectional reinforced structures, wherein the first one is that as shown in fig. 5, two strong ridge units 20 arranged perpendicular to each other are arranged at each arrangement position to form a single-limb type strong ridge structure; in the second structure, as shown in fig. 6, four uniformly distributed strong ridge units 20 are arranged at each arrangement position to form an integral strong ridge structure; a third configuration is shown in fig. 7, in which two interconnected strong spine units 20 are disposed between two adjacent arrangement positions to form a coupled strong spine structure.
According to the earthquake-resistant reinforcing method for the frame structure building, provided by the embodiment, the strong ridge truss 21 which is vertically arranged is arranged, so that the lateral deformation of the frame structure building can be effectively controlled, the lateral unevenness among layers is reduced, and a weak layer is avoided; meanwhile, by arranging the replaceable energy dissipation element 22, the overall energy dissipation capacity of the frame structure building is effectively improved, the earthquake response of the structure is reduced, the realization of an expected damage mechanism is facilitated, the earthquake resistance is obviously improved, in addition, the strong spine unit 20 has flexible plane layout, the construction is convenient, the structural fuse can be replaced, the repair time of the structure after the earthquake can be reduced, and the rapid recovery of the building function after the earthquake is realized. In use, once the frame structure building is deformed laterally, the strong spine unit 20 will rotate with the connection point between the first support rod 28 and the foundation 30 as a pivot, and the energy dissipation elements 22 on the strong spine unit 20 will be deformed and dissipated.
The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.
Claims (9)
1. The method for seismic reinforcement of the frame structure building is characterized by comprising the following steps:
s1, evaluating the floor lateral displacement uneven coefficient and the structure performance of the frame structure building to obtain an evaluation result;
s2, determining the arrangement positions and the arrangement quantity of the strong ridge units on the frame structure building according to the evaluation result, and drawing a construction drawing;
s3, arranging the strong ridge units on the frame structure building according to the construction drawing to finish seismic reinforcement of the frame structure building;
the strong ridge unit comprises at least two vertically arranged strong ridge trusses fixedly connected or integrally connected to the frame structure building and energy dissipation elements connected between the bottom of each strong ridge truss and the foundation.
2. A method for earthquake resistance and reinforcement of a frame structure building according to claim 1, wherein said strong-ridge truss comprises a square frame and support frames respectively located at the upper and lower ends of said square frame, said square frame comprises a cross bar and an upright bar enclosing each other to form a square structure, and a first diagonal brace connected to one of the diagonal corners of said square structure, said support frames comprise a second support bar located on the same straight line with one of said upright bars and a second diagonal brace fixedly connected to said second support bar at one end, and the end of said second support bar not connected to said second diagonal brace and the end of said second diagonal brace not connected to said second support bar are respectively fixedly connected to the corresponding corner of said square frame.
3. A method of seismic reinforcement of a frame structure building according to claim 2, wherein two of said support frames are symmetrically arranged in the same said strong-ridge truss.
4. A method for earthquake resistant reinforcement of a frame structure building according to claim 3, wherein said strong-ridge truss further comprises a first support bar disposed in parallel with said second support bar, said first support bar being fixedly connected at an upper end thereof to a position where said square frame is connected to said second diagonal support bar located relatively below, and at a lower end thereof being connected to said foundation through said energy dissipating member.
5. A method of seismic reinforcement of a frame structure building according to claim 4, wherein the uprights, the cross-bar, the first support bar and/or the second support bar are cross-bars or uprights in the frame structure building.
6. A method for earthquake-resistant reinforcement of a frame structure building according to claim 2, wherein there are more than two square frames in the same strong-ridge truss, each square frame is connected in turn from the top up, and two adjacent square frames share the same cross bar.
7. A method for earthquake-resistant reinforcement of a frame structure building according to any one of claims 1 to 6, wherein in step S3, two said ridge units arranged perpendicularly to each other are provided at each of said arrangement positions to form a single-limb type ridge structure.
8. A method for earthquake resistant reinforcement of a frame structure building according to any one of claims 1 to 6, wherein in step S3, four evenly distributed said strong ridge units are provided at each of said arrangement positions to form an integral strong ridge structure.
9. A method for earthquake resistant reinforcement of a frame structure building according to any one of claims 1 to 6, wherein in step S3, two of said strong spine units connected to each other are disposed between two adjacent ones of said disposition positions to form a coupled type strong spine structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010061484.6A CN111255255A (en) | 2020-01-19 | 2020-01-19 | Anti-seismic reinforcing method for frame structure building |
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| CN202010061484.6A CN111255255A (en) | 2020-01-19 | 2020-01-19 | Anti-seismic reinforcing method for frame structure building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115182474A (en) * | 2022-06-16 | 2022-10-14 | 桂林理工大学 | Energy consumption bracing system based on bistable rod piece system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115182474B (en) * | 2022-06-16 | 2024-04-02 | 桂林理工大学 | Energy-consumption diagonal bracing system based on bistable rod piece system |
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