CN110512799A - A kind of core-added laminated column and its construction method for ground frame structures under action - Google Patents
A kind of core-added laminated column and its construction method for ground frame structures under action Download PDFInfo
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- CN110512799A CN110512799A CN201910804704.7A CN201910804704A CN110512799A CN 110512799 A CN110512799 A CN 110512799A CN 201910804704 A CN201910804704 A CN 201910804704A CN 110512799 A CN110512799 A CN 110512799A
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- column
- hollow shell
- stem
- precast hollow
- core
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
Abstract
The invention discloses a kind of core-added laminated columns and its construction method for ground frame structures under action, including stem, precast hollow shell of column and frictional layer.Stem sectional dimension is small, and slenderness ratio is big, and stratified deformation ability is strong；Precast hollow shell of column is vertically superimposed upon on the outside of stem, when horizontal stratified deformation, the opposite changing of the relative positions occurs between each shell of column, the shearing and moment of flexure undertaken is smaller, can give full play to vertical bearing function.Core-added laminated column of the present invention can significantly improve the stratified deformation ability of ground frame structures under action column in the case where guaranteeing that vertical bearing capacity does not reduce, and then improve the anti-seismic performance of underground structure key column.Meanwhile it is core-added laminated column simple structure of the present invention, easy for construction, and prefabricated components quality is easily controllable, meets building industrialization trend.
Description
Technical field
The present invention relates to Civil Engineering Design and construction field more particularly to underground structure seismic resistance fields to be specifically
A kind of core-added laminated column and its construction method for ground frame structures under action.
Background technique
In nineteen ninety-five Japan's Osaka-Kobe earthquake, subway station is opened greatly, disrepair destruction occurs.Correlative study shows that column is underground
The destruction of the weak link of frame structure, column results in fractureing for structure roof, so cause total disrepair and
The depression on ground.Compared with side wall, the axial compression ratio of column is larger and deformability is smaller, in the case where identical stratified deformation,
It is the immanent cause for causing it to lose vertical bearing function that column takes the lead in destroying because of deformability deficiency.Therefore, underground structure
The key that anti-seismic performance is promoted is to improve the stratified deformation ability of column, while guaranteeing that column has enough vertical carrying energy
Power.
In ground frame structures under action, vertical load is by column and side wall shared, and the relatively small section face of column
Product assumes responsibility for more vertical loads.During geological process, structure issues unboiled water leveling in the imposed displacement of surrounding soil
Between be displaced, due to column anti-side rigidity be much smaller than side wall, the horizontal loading very little that column undertakes.Therefore, ground frame structures under action
The major function of column is to undertake vertical load.Construction measure appropriate is taken, the Its ultimate bearing capacity of column is weakened, to change
It is apt to column to the adaptability of structure interlayer relative deformation, the promotion of column anti-seismic performance is advantageous.
The principal element for influencing column stratified deformation ability has axial compression ratio, slenderness ratio and stirrup ratio etc..Reducing axial compression ratio can
To increase the stratified deformation ability of column, however, need to meet vertical carrying demand: (1) increasing the area of section of column,
This is contradicted with slenderness ratio is increased；Or more columns are arranged in (2), this often will affect the use function of structure.It improves with hoop
Rate can improve the stratified deformation ability of column, but improve limitation.
Summary of the invention
Because of stratified deformation scarce capacity become asking for antidetonation weak link to solve traditionally frame structures under action column
Topic improves the stratified deformation ability of subway station column, guarantees that large deformation lower pillar stand will not lose vertical bearing capacity.The present invention
Provide a kind of core-added laminated column and its construction method for ground frame structures under action.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of core-added laminated column improving underground frame structure system anti-seismic performance, which is characterized in that including stem 1, in advance
Make hollow shell of column 2 and frictional layer 3.Precast hollow shell of column 2 is in vertical superposition composition lamination hollow structure；It is empty that stem 1 is inserted into lamination
In core structure, matched with each precast hollow shell of column 2；There are deformation space 4, frictional layers between stem 1 and precast hollow shell of column 2
3 are arranged between each precast hollow shell of column 2.
The stem 1 is steel core concrete column, and the sectional dimension of stem 1 is small, and slenderness ratio is big, and deformability is strong, removes and divides
It carries on a shoulder pole outside certain shearing and moment of flexure, the major function of stem 1 is to coordinate the horizontal distortion of outside precast hollow shell of column 2.
The precast hollow shell of column 2 is reinforced concrete circular component, and multiple precast hollow shell of columns 2 are vertically being superimposed,
Form vertical bearing system, the i.e. hollow shell of column of lamination.The horizontal interlayer deformation pattern of the hollow shell of column of lamination is shown as between shell of column
The opposite changing of the relative positions, the vertical bearing capacity of the hollow shell of column of lamination can come by force by improving strength grade of concrete or improving the ratio of reinforcement
Change.
The inner circle radius of the precast hollow shell of column 2 is formed between stem 1 and precast hollow shell of column 2 along height change
Deformation space 4, deformation space 4 can avoid the hollow shell of column of lamination in sliding process to the shear action of stem, guarantees stem 1
It occurs bending and deformation and generation level is with respect to the changing of the relative positions between precast hollow shell of column 2.
The exradius of the precast hollow shell of column 2 is expressed as R, and inner circle radius is expressed as r, wherein R is kept along height
Constant, r is gradually changed along height.Specifically, the inner circle radius on the top top precast hollow shell of column 2a is minimum, it is equal to stem 1
Section radius, be denoted as r=r1, stem 1 and precast hollow shell of column 2a are closely connected at this time；The bottom end of top precast hollow shell of column 2a
Inner circle radius is maximum, is denoted as r=r2, the radius r of stem 1 at this time1With precast hollow shell of column 2a inner circle radius r2Between difference most
Greatly, i.e. the width of deformation space 4 is maximum, is expressed as δ=r2-r1；The width of the corresponding deformation space 4 of middle part precast hollow shell of column 2b
Degree is gradually increased from centre to both ends, i.e. stem 1 and precast hollow shell of column 2b is closely connected in centre, and at both ends, deformation space 4 reaches
Maximum width δ.Bottom precast hollow shell of column 2c and top precast hollow shell of column 2a are symmetrical about horizontal plane.R is along height arc
Deformation, to adapt to the bending deformation feature of stem 1.
The precast hollow shell of column 2 and frictional layer 3 are completed after installing and being fixed temporarily, and prefabricated steel pipe insertion lamination is empty
In the internal cavities of stem section, and then the casting concrete into steel pipe, form steel tube concrete core pillar 1.Structure bottom beam 5 and top beam
Rim of a cup basis is set on 6, steel mesh is set at rim of a cup basis and is protruded into the steel pipe of stem 1, realizes stem 1 and structure bottom beam 5
With being reliably connected for top beam 6.
The frictional layer 3 is set between precast hollow shell of column 2, guarantees precast hollow shell of column 2 in horizontal loads
Under the horizontal opposite changing of the relative positions can occur.When vertical load is smaller, the anti-friction alloy material after lubricated is fixed to each pre-
The end of hollow shell of column 2 is made, forms the lesser contact surface of coefficient of friction to realize smooth sliding；When vertical load is larger, each
It is embedded in that horizontal shear rigidity is smaller between precast hollow shell of column 2 and the biggish rubber layer of vertical compression rigidity, utilizes rubber layer
Horizontal distortion realizes the relative level changing of the relative positions between each precast hollow shell of column 2；In addition the spin support or roll shaft branch rationally designed
Above-mentioned purpose also may be implemented in seat.
The design principle of core-added laminated column are as follows: in the premise for the vertical bearing function for guaranteeing ground frame structures under action central post
Under, by rationally designing the number of precast hollow shell of column 2 and the width of deformation space 4, improve the horizontal direction deformability of column.
Wherein, the vertical bearing capacity of core-added laminated column can be calculated by effective cross-sectional area；In the condition for not considering that stem 1 fails
Under, core-added laminated column deformability is directly proportional to the width δ of the number of precast hollow shell of column 2 and deformation space 4.
The invention has the benefit that
1, core-added laminated column can significantly improve underground structure column in the case where guaranteeing that vertical bearing capacity does not reduce
Stratified deformation ability, and then improve underground structure key column anti-seismic performance.
2, core-added laminated column stress is simple.Under static load effect, core-added laminated column mainly undertakes superstructure transmitting
Vertical load；Under horizontal earthquake action, the relative deformation of the country rock soil body is applied in structure and causes structure that interlayer occurs
The opposite changing of the relative positions occurs when deformation, between the outside shell of column of core-added laminated column, core-added laminated column undertakes lesser shearing and moment of flexure.This
It is adapted with the major function of ground frame structures under action column, that is, undertakes vertical carrying.
3, core-added laminated column simple structure, easy for installation, prefabricated components quality is easily controllable, meets building industrialization and becomes
Gesture.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of core-added laminated column of the present invention.
Fig. 2 is the profile construction detail drawing of precast hollow shell of column of the present invention.
Fig. 3 is the construction process figure of core-added laminated column of the present invention.
Fig. 4 is the deformation pattern schematic diagram of core-added laminated column of the present invention.
In figure, 1- stem；2- precast hollow shell of column (wherein, precast hollow shell of column at the top of 2a-, the middle part 2b- precast hollow column
Section, the bottom 2c- precast hollow shell of column)；3- frictional layer；4- deformation space；5- bottom beam；6- top beam.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The stereoscopic schematic diagram of core-added laminated column of the present invention is as shown in Figure 1, include stem 1, precast hollow shell of column 2, frictional layer
3.Precast hollow shell of column 2 is in vertical superposition composition lamination hollow structure；Stem 1 is inserted into lamination hollow structure, with each prefabricated sky
Stem section 2 matches；There are deformation space 4 between stem 1 and precast hollow shell of column 2, frictional layer 3 is arranged in each precast hollow column
Between section 2.
Stem 1 is steel core concrete column, and the sectional dimension of stem 1 is small, and slenderness ratio is big, and deformability is strong, certain except sharing
Shearing and moment of flexure outside, the major function of stem 1 is to coordinate the horizontal distortion of outside precast hollow shell of column 2.
Precast hollow shell of column 2 is reinforced concrete circular component, and multiple precast hollow shell of columns 2 are vertically being superimposed, and is formed perpendicular
To bearing system, the i.e. hollow shell of column of lamination.The vertical bearing capacity of the hollow shell of column of lamination can be by improving strength grade of concrete
Or the ratio of reinforcement is improved to strengthen.
The inner circle radius of precast hollow shell of column 2 forms the deformation between stem 1 and precast hollow shell of column 2 along height change
Space 4, deformation space 4 can avoid the hollow shell of column of lamination in sliding process to the shear action of stem 1, guarantee that stem 1 occurs
Bending deformation and the horizontal opposite changing of the relative positions occurs between precast hollow shell of column 2.
(note: all sections in attached drawing are the A- in Fig. 1 to the profile construction detail drawing of precast hollow shell of column 2 as shown in Figure 2
A section).The exradius of precast hollow shell of column 2 is expressed as R, and inner circle radius is expressed as r, wherein R is remained unchanged along height, r
It is gradually changed along height.Specifically, the inner circle radius on the top top precast hollow shell of column 2a is minimum, equal to the section of stem 1
Radius is denoted as r=r1, stem 1 and precast hollow shell of column 2a are closely connected at this time；The inner circle of the bottom end of top precast hollow shell of column 2a half
Diameter is maximum, is denoted as r=r2, the radius r of stem 1 at this time1With precast hollow shell of column 2a inner circle radius r2Between difference it is maximum, i.e.,
The width of deformation space 4 is maximum, is expressed as δ=r2-r1；The width of the corresponding deformation space 4 of middle part precast hollow shell of column 2b is therefrom
Between be gradually increased to both ends, i.e. stem 1 and precast hollow shell of column 2b reaches maximum deformation space at both ends intermediate closely connected
Width δ.Bottom precast hollow shell of column 2c and top precast hollow shell of column 2a are symmetrical about horizontal plane.R becomes along height arc
Change, to adapt to the bending deformation feature of stem 1.
Frictional layer 3 is set between precast hollow shell of column 2, guarantees that precast hollow shell of column 2 can under horizontal loads
The horizontal opposite changing of the relative positions occurs.When vertical load is smaller, the anti-friction alloy material after lubricated is fixed to each precast hollow
The end of shell of column 2 forms the lesser contact surface of coefficient of friction to realize smooth sliding；When vertical load is larger, in each prefabricated sky
It is embedded in that horizontal shear rigidity is smaller between stem section 2 and the biggish rubber layer of vertical compression rigidity, the horizontal of rubber layer is utilized to become
Shape realizes the relative level changing of the relative positions between each precast hollow shell of column 2；In addition the spin support or roller support rationally designed can also
To realize above-mentioned purpose.
Fig. 3 is the construction process figure of core-added laminated column of the present invention.S1: cast-in-place bottom beam 5 reserves 1 column bottom rim of a cup of stem, rim of a cup
Middle stretching connects reinforcing bar；S2: the precast hollow shell of column 2 of end insertion anti-friction alloy plate is neatly stacked in the rim of a cup of bottom beam 5
Top is fixed temporarily；S3: the steel pipe of stem 1 is inserted into the rim of a cup of bottom beam 5 by the cavity of the hollow shell of column of lamination；S4: Xiang Gang
Casting concrete in pipe, forms steel tube concrete core pillar 1, and 1 top setting unit reinforcing bar of stem is connect with top beam 6；S5: formwork is existing
Top beam 6 is poured, 6 bottom of top beam is made as the form of bolumn cap, 1 extension of stem and the cast-in-place combination of top beam 6.
Fig. 4 is the deformation pattern schematic diagram of core-added laminated column of the present invention.Under horizontal loads, stem 1 shows as curved
Song deformation, lamination open tubular column section show as the opposite changing of the relative positions between precast hollow shell of column 2.Stem 1 coordinates precast hollow shell of column 2
Horizontal distortion, precast hollow shell of column 2 can avoid stem 1 to the effect of contraction of stem 1 and unstable failure occur.
It describes the invention in detail above, but the implementation model that the content should not be considered as limiting the invention
It encloses, any changes and modifications in accordance with the scope of the present application, should still belong to patent covering scope of the invention
Within.
Claims (6)
1. a kind of core-added laminated column for ground frame structures under action, which is characterized in that including stem (1), precast hollow shell of column (2)
With frictional layer (3)；Precast hollow shell of column (2) is in vertical superposition composition lamination hollow structure；Stem (1) is inserted into lamination hollow structure
In, it is matched with each precast hollow shell of column (2)；There are deformation space (4), frictions between stem (1) and precast hollow shell of column (2)
Layer (3) is arranged between each precast hollow shell of column (2).
2. a kind of core-added laminated column and its construction method for ground frame structures under action according to claim 1, feature
It is, the stem (1) is steel core concrete column, and the sectional dimension of stem (1) is small, and slenderness ratio is big, and deformability is strong, removes and divides
It carries on a shoulder pole outside certain shearing and moment of flexure, the function of stem (1) is to coordinate the horizontal distortion of outside precast hollow shell of column (2).
3. a kind of core-added laminated column and its construction method for ground frame structures under action according to claim 1, feature
It is, the precast hollow shell of column (2) is reinforced concrete circular component, and the inner circle radius of precast hollow shell of column (2) is along high
Degree variation, forms the deformation space (4) between stem (1) and precast hollow shell of column (2)；The precast hollow shell of column (2)
Exradius is expressed as R, and inner circle radius is expressed as r, wherein R is remained unchanged along height, and r is along the arc-shaped variation of height, to adapt to
The bending deformation feature of stem (1).
4. a kind of core-added laminated column and its construction method for ground frame structures under action according to claim 1, feature
It is, the frictional layer (3) is set between precast hollow shell of column (2), guarantees that precast hollow shell of column (2) are made in horizontal loading
The horizontal opposite changing of the relative positions can occur under；When vertical load is smaller, the anti-friction alloy material after lubricated is fixed to each
The end of precast hollow shell of column (2) forms the lesser contact surface of coefficient of friction to realize smooth sliding；When vertical load is larger,
It is embedded in that horizontal shear rigidity is smaller between each precast hollow shell of column (2) and rubber layer that vertical compression rigidity is big, utilizes rubber
The horizontal distortion of layer realizes the relative level changing of the relative positions between each precast hollow shell of column (2).
5. a kind of core-added laminated column and its construction method for ground frame structures under action according to claim 1, feature
Be, the specific implementation of core-added laminated column is as follows: S1: cast-in-place bottom beam (5) reserves stem (1) column bottom rim of a cup, stretches out and connect in rim of a cup
Connect reinforcing bar；S2: the precast hollow shell of column (2) of end insertion anti-friction alloy plate is neatly stacked in above the rim of a cup of bottom beam (5),
It is fixed temporarily；S3: the steel pipe of stem (1) is inserted into the rim of a cup of bottom beam (5) by the cavity of the hollow shell of column of lamination；S4: Xiang Gang
Casting concrete in pipe is formed steel tube concrete core pillar (1), and setting reinforcing bar is connect with top beam (6) at the top of stem (1)；S5: formwork
Cast-in-place top beam (6), top beam (6) bottom are made as the form of bolumn cap, stem (1) extension and top beam (6) cast-in-place combination.
6. a kind of construction for core-added laminated column for ground frame structures under action that core-added laminated column carries out according to claim 1
Method, which is characterized in that the design principle of core-added laminated column are as follows: in the vertical bearing function for guaranteeing ground frame structures under action central post
Under the premise of, by designing the number of precast hollow shell of column (2) and the width of deformation space (4), the horizontal direction for improving column becomes
Shape ability；Wherein, the vertical bearing capacity of core-added laminated column is calculated by effective cross-sectional area；Do not considering stem (1) failure
Under conditions of, core-added laminated column deformability is directly proportional to the width δ of the number of precast hollow shell of column (2) and deformation space (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910804704.7A CN110512799B (en) | 2019-08-28 | 2019-08-28 | Laminated core-added column for underground frame structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910804704.7A CN110512799B (en) | 2019-08-28 | 2019-08-28 | Laminated core-added column for underground frame structure and construction method thereof |
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| CN110512799A true CN110512799A (en) | 2019-11-29 |
| CN110512799B CN110512799B (en) | 2021-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115198795A (en) * | 2022-07-21 | 2022-10-18 | 北京工业大学 | Subway station stack core column capable of being quickly repaired after earthquake |
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