CN206070881U - The beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton - Google Patents
The beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton Download PDFInfo
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- CN206070881U CN206070881U CN201621051574.2U CN201621051574U CN206070881U CN 206070881 U CN206070881 U CN 206070881U CN 201621051574 U CN201621051574 U CN 201621051574U CN 206070881 U CN206070881 U CN 206070881U
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- support skeleton
- bar support
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Abstract
This utility model is related to beam bottom bar construction field, discloses the beam bottom bar construction that a kind of utilization reinforced bar support skeleton controls thickness of protection tier.This utility model includes beam stress muscle positioned at beam upper end, the bearing rod positioned at beam lower end and the stirrup that beam stress muscle and bearing rod are fixed together; also include reinforced bar support skeleton; the reinforced bar support skeleton is located at below beam stress muscle; reinforced bar support skeleton is connected on structural slab bottom edges reinforcing bar by cushion block; the cushion block bottom is supported on above the concrete cover of beam side; a diameter of 18 25mm of the reinforced bar support skeleton; the length of the reinforced bar support skeleton is 0.5 0.9m, and the cushion block is quincunx concrete pad.This utility model simple structure, eliminates beam heelpiece block, controls the thickness of beam bottom cover to reinforcement using bar construction.
Description
Technical field
This utility model is related to beam bottom bar construction field, more particularly to a kind of to control reinforcing bar using reinforced bar support skeleton
The beam bottom bar construction of protective layer thickness.
Background technology
Described beam pad in beam heelpiece block i.e. masonry structure teaching material, its effect are exactly in the effect of beam-ends concentration power and block
Body local time, when beam-ends bottom masonry local bearing strength is unsatisfactory for, expands the face contacted with masonry by beam-ends using beam pad
Accumulate to reduce beam-ends concentration power to the compressive stress caused by masonry, beam pad is divided into two kinds of rigidity and flexibility, rigidly needs directly to put
Put under beam, flexible beam pad is exactly together to pour into a mould in beam pad configuration reinforcement and with beam.In concreting process, Jing often occurs
Beam base concrete protective layer because cushion block arrange it is lack of standardization, or because the anthropic factor in work progress causes cushion block off normal, as a result
The quality problems for causing beam base concrete thickness of protection tier deviation excessive, and these quality problems return the later stage repair make
Into difficulty.
Utility model content
This utility model provides a kind of simple structure, eliminates beam heelpiece block, is protected using bar construction control beam bottom reinforcing bar
The thickness beam bottom bar construction of sheath.Technical problem to be solved is：Using beam heelpiece block because many unstable factors cause beam
The excessive problem of base concrete protective layer thickness deviation.
To solve above-mentioned technical problem, this utility model is adopted the following technical scheme that：
This utility model controls the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton, including positioned at beam
The beam stress muscle of upper end, the bearing rod positioned at beam lower end and the stirrup that beam stress muscle and bearing rod are fixed together, also wrap
Reinforced bar support skeleton is included, the reinforced bar support skeleton is located at below beam stress muscle, and reinforced bar support skeleton is connected to knot by cushion block
On structure plate bottom edges reinforcing bar, the cushion block bottom is supported on above the concrete cover of beam side, the reinforced bar support skeleton
A diameter of 18-25mm, the length of the reinforced bar support skeleton is 0.5-0.9m, and the cushion block is quincunx concrete pad.
This utility model controls the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton, further,
The reinforced bar support skeleton is arranged on the junction of primary-secondary beam.
This utility model controls the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton, further,
The spacing of the reinforced bar support skeleton is 0-2m.
This utility model controls the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton, further,
The height of the cushion block is 25-35mm.
This utility model controls the beam bottom bar construction and prior art of thickness of protection tier using reinforced bar support skeleton
Compare and have the advantages that：
This utility model eliminates the setting of beam heelpiece block, and the junction for changing maximum primary-secondary beam in amount of deflection employs steel
Muscle support frame, is fixed on reinforced bar support skeleton on structural slab bottom edges reinforcing bar with quincunx concrete pad, and
Above the concrete cover of beam side, quincunx cushion block inserts clamping reinforcing bar to pad up and down, and fix stably, position are not easily shifted,
And the height up and down of quincunx cushion block is different, can be by turning cushion block direction to reach different construction requirements, need not
Customized, easy construction improves the utilization rate of cushion block.This utility model controls the diameter of reinforced bar support skeleton, length by adjusting
The height of degree and cushion block to be controlling beam base concrete protective layer thickness, it is to avoid because of beam heelpiece block caused by artificial construction factor
The excessive problem of displacement, protective layer thickness deviation.
Control the beam bottom steel of thickness of protection tier below in conjunction with the accompanying drawings to utilization reinforced bar support skeleton of the present utility model
Muscle structure is described further.
Description of the drawings
Fig. 1 is the structure of the beam bottom bar construction that this utility model controls thickness of protection tier using reinforced bar support skeleton
Schematic diagram；
Fig. 2 is many Span Continuous statically determinate beam stress models under evenly load；
Fig. 3 is the schematic diagram of certain architectural structure system in specific embodiment.
Reference：
1- beam stress muscle；2- bearing rods；3- stirrups；4- reinforced bar support skeletons；5- cushion blocks；6- structural slab bottom edges steel
Muscle.
Specific embodiment
As shown in figure 1, this utility model controls the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton
One is fixed on including the beam stress muscle 1 positioned at beam upper end, the bearing rod 2 positioned at beam lower end and by beam stress muscle 1 and bearing rod 2
The stirrup 3 for rising, also including reinforced bar support skeleton 4, reinforced bar support skeleton 4 is located at below beam stress muscle 1, and reinforced bar support skeleton 4 leads to
Cross cushion block 5 to be connected on structural slab bottom edges reinforcing bar 6,5 bottom of cushion block is supported on above the concrete cover of beam side, general steel
Muscle support frame 4 is arranged on the junction of primary-secondary beam, a diameter of 18-25mm of reinforced bar support skeleton 4, reinforced bar support skeleton 4
Length is 0.5-0.9m, and cushion block 5 is quincunx concrete pad, and the height of cushion block 5 is 25-35mm.
This utility model controls the construction method of the beam bottom bar construction of thickness of protection tier using reinforced bar support skeleton
It is as follows：
A, primary and secondary beam steel bar colligation, template are built；
B, selection reinforced bar support skeleton 4：
The selection of the diameter, length and spacing of reinforced bar support skeleton 4, is carried out as follows：
It is ± 5mm according to the 5.2.5 regulation beam stress thickness of protection tier tolerances in GB50204-2015 specifications；
GB50010-2010《Code for design of concrete structures》Middle regulation grade III steel reinforcing bar Elastic Modulus Values are Es=2.0 × 1011N/
m2。
As shown in Fig. 2 the unknown arbitrary continuation multispan beam statically determinate structure of span, is equally spaced support frame in beam upper end
Armored concrete cushion block, by setting up static determinacy continuous beam on many supports deformation under Uniform Load, provides satisfaction essence using the addition method
The reduced mechanical model that degree is required.Principle is corresponded according to any point stress and strain in beam, can when the deformation of beam is calculated
To use principle of stacking, i.e., the displacement produced under every kind of load independent role is calculated respectively, and superposition is sued for peace.Such as Fig. 2
It is shown, by many Span Continuous statically determinate beam stress models under evenly load, wherein it is any one across deformation calculate and can be divided into a, b and c
Three parts constitute：
From mechanics of materials related content：
Deflection Formula in Fig. 2 under stress shown in a is：
Deflection Formula in Fig. 2 under stress shown in a is：
Deflection Formula in Fig. 2 under stress shown in a is：
According to the total deformation amount of deflection of principle of stacking beam be formula (4) shown in,
In formula：Combined deflections of the f for beam；
Load N/m that q is born by girder；
Length m of the l for reinforced bar support skeleton；
MIt is leftFor continuous beam on many supports evenly load bottom left moment of flexure；
MIt is rightFor continuous beam on many supports evenly load bottom right moment of flexure；
Elastic modelling quantity N/ms of the E for reinforcing bar2；
I is the cross sectional moment of inertia that I is beam longitudinal reinforcement.
Another EI=K, then formula (4) following form can be changed：
Certain architectural structure system as shown in figure 3, be analyzed calculating, girder load is plate upper reinforcement lotus to girder
Carry, secondary beam load and girder reinforcing bar are conducted oneself with dignity, above-mentioned load is analyzed, and checks whether amount of deflection meets the requirements.
Suffered by girder, plate upper reinforcement load is：
q1=8 × 0.00617 × 82× 10 × 2/2=31.59N/m
Flooring construction live load be：
q2=2 × 2 × 2/4/2=0.5KN/m
The weight of every meter of horizontal force reinforcing bar, 3 weight of stirrup is：
q4=64 × [(0.35+0.55+0.1) × 2+ (0.15+0.55+0.1) × 2] × 0.00617 × 82× 10/8=
113.73N/m
Vertical concrete steel muscle weight is：
q6=8 × 0.00617 × 252×10+6×0.00617×142× 10=381.06N/m
Dead load is:
q7=q1+q4+q6=912.65N/m
Carry out Load Combination can the full payload received of winner's joist support be：
Q=1.2q7+1.4q2=1795.18N/m
Work as MIt is leftWith MIt is rightWhen equal, formula (5) is accurate solution, works as MIt is leftAnd MIt is rightIn when to have one be zero, the formula exists maximum
Error.So mid-span deflection calculating is carried out under limiting case.
By formula (6)
In formula：Cross sectional moment of inertias of the I for beam longitudinal reinforcement；
Diameter mms of the d for spacer bar；
Formula (6) is substituted in formula (5), is calculated：
In formula：Diameter mms of the d for spacer bar；
Length m of the l for reinforced bar support skeleton；
Load N/m that q is born by girder；
Combined deflections of the f for beam；
Elastic modelling quantity N/ms of the E for reinforcing bar2。
The diameter and length of reinforced bar support skeleton 4 be suitable in Specific construction requirement can be calculated by formula (4).
It is ± 5mm according to GB50204-2015 specifications 5.2.5 regulation beam stress thickness of protection tier tolerance, according to
It is as shown in table 1 that formula (7) can be calculated the diameter of reinforced bar support skeleton 4, the functional relationship between length and force deflection.
The functional relationship of the diameter, length and force deflection of 1 reinforced bar support skeleton of table
According to table 1, the diameter span of reinforced bar support skeleton is optimal for 18-25mm, and length span is
0.5-0.9m is advisable.
Spacing L between continuous beam on many supports reinforced bar support skeleton is checked based on this, according to《Functional archiotecture structural static
Reckoner》Relevant regulations in 323 page tables 4.9：
In formula：w1For static load four across etc. span continuous beam midpoint maximum defluxion m；
Length m of the l for reinforced bar support skeleton；
Load N/m that q is born by girder；
Elastic modelling quantity N/ms of the E for reinforcing bar2。
Cross sectional moment of inertias of the I for beam longitudinal reinforcement.
From safety and economy from the point of view of, when for four-span continuous beams beam when,
It is ± 5mm according to the 5.2.5 regulation beam stress thickness of protection tier tolerances in GB50204-2015 specifications,
That is w1For 0-5mm, four-span continuous beams beam meets stress and safety requirements.And now between continuous beam on many supports support frame reinforcing bar between
It is 0-2m away from L spans, from from the point of view of economic worth, L values can be 2m.Know that four-span continuous beams beam deflection is known by above-mentioned
The limit is close to, three-span continuous beam is no longer checked.
C, the suitable concrete pad 5 of selection are simultaneously positioned：
The selection of concrete mats tile height, circular are as follows：
On the height of cushion block=structure plate thickness-beam, ferrum thickness of protection tier-secondary beam bar diameter-girder reinforcing bar is straight
Footpath-support frame bar diameter.
According to step B, the diameter span for being calculated reinforced bar support skeleton is 18-25mm, calculates and understands pad
The span of tile height is 25-35mm.
By above-mentioned result of calculation, strength checking understands that the comprcssive strength of cushion block is not less than q/8, much smaller than code requirement coagulation
The comprcssive strength of native cushion block is 26.8MPa not less than intensity C30 of the layer concrete.
D, reinforced bar support skeleton 4 is put in cushion block 5 fixed, then puts it in the reinforcing bar of primary-secondary beam, block below cushion block 5
It is connected on structural slab bottom edges reinforcing bar 6,5 bottom of cushion block is supported on above the concrete cover of beam side, and adjustment position；
E, the concreting for carrying out primary-secondary beam.
Embodiment described above is only that preferred implementation of the present utility model is described, not to this practicality
New scope is defined, and on the premise of without departing from this utility model design spirit, those of ordinary skill in the art are to this
Various modifications and improvement that the technical scheme of utility model is made, all should fall into the protection of this utility model claims determination
In the range of.
Claims (4)
1. the beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton, including the beam stress positioned at beam upper end
Muscle (1), the bearing rod (2) positioned at beam lower end and the stirrup (3) that beam stress muscle (1) and bearing rod (2) are fixed together, its
It is characterised by：Also include reinforced bar support skeleton (4), the reinforced bar support skeleton (4) below beam stress muscle (1), reinforcement bar support
Support bone frame (4) is connected on structural slab bottom edges reinforcing bar (6) by cushion block (5), and cushion block (5) bottom is supported on beam side and mixes
Above solidifying protective soil layer, a diameter of 18-25mm of the reinforced bar support skeleton (4), the length of the reinforced bar support skeleton (4) is
0.5-0.9m, the cushion block (5) are quincunx concrete pad.
2. utilization reinforced bar support skeleton according to claim 1 controls the beam bottom bar construction of thickness of protection tier, its
It is characterised by：The reinforced bar support skeleton (4) is arranged on the junction of primary-secondary beam.
3. utilization reinforced bar support skeleton according to claim 2 controls the beam bottom bar construction of thickness of protection tier, its
It is characterised by：The spacing of the reinforced bar support skeleton (4) is 0-2m.
4. utilization reinforced bar support skeleton according to claim 3 controls the beam bottom bar construction of thickness of protection tier, its
It is characterised by：The height of the cushion block (5) is 25-35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051574.2U CN206070881U (en) | 2016-09-12 | 2016-09-12 | The beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051574.2U CN206070881U (en) | 2016-09-12 | 2016-09-12 | The beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton |
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| CN206070881U true CN206070881U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621051574.2U Expired - Fee Related CN206070881U (en) | 2016-09-12 | 2016-09-12 | The beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223545A (en) * | 2016-09-12 | 2016-12-14 | 中国建筑局（集团）有限公司 | Reinforced bar support skeleton is utilized to control bar construction at the bottom of the beam of thickness of protection tier |
| CN109653445A (en) * | 2019-02-22 | 2019-04-19 | 南通市达欣工程股份有限公司 | The thickness adjusting apparatus and method of cover to reinforcement |
-
2016
- 2016-09-12 CN CN201621051574.2U patent/CN206070881U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223545A (en) * | 2016-09-12 | 2016-12-14 | 中国建筑局（集团）有限公司 | Reinforced bar support skeleton is utilized to control bar construction at the bottom of the beam of thickness of protection tier |
| CN106223545B (en) * | 2016-09-12 | 2018-08-07 | 中国建筑一局(集团)有限公司 | The construction method of the beam bottom bar construction of thickness of protection tier is controlled using reinforced bar support skeleton |
| CN109653445A (en) * | 2019-02-22 | 2019-04-19 | 南通市达欣工程股份有限公司 | The thickness adjusting apparatus and method of cover to reinforcement |
| CN109653445B (en) * | 2019-02-22 | 2021-01-12 | 南通市达欣工程股份有限公司 | Thickness adjusting device and method for steel bar protection layer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 |