CN209443668U - Deformed bar with ribbing - Google Patents

Abstract

The utility model belongs to reinforcing bar technical field.A kind of deformed bar with ribbing, including reinforcing bar ontology and the conical rib being laid on the reinforcing bar ontology, along the axis direction of the reinforcing bar ontology, equidistantly interval is laid with crossrib cell on the reinforcing bar ontology, each crossrib cell includes at least two conical ribs being circumferentially uniformly arranged, it is additionally provided with longitudinal rib on the reinforcing bar ontology, at least twice longitudinal rib is laid on the reinforcing bar ontology, the longitudinal rib is circumferentially uniformly arranged on the reinforcing bar ontology.The reinforcing bar ribbed of conical rib disclosed in the utility model is different from common Rib Reinforced reinforcement, while possessing Rib Reinforced reinforcement general performance, with with Concrete Bond Strength height, the few feature of consumable material, it cannot only be applied to common building engineering, it can also be applied to higher for shockproof requirements and other specific demands architectural engineerings, there is preferable overall economic efficiency.

Description

Deformed bar with ribbing

Technical field

The utility model belongs to reinforcing bar technical field, and in particular to a kind of deformed bar with ribbing.

Background technique

Reinforced concrete structure is worked together by bond-anchorage between the two, plain bar and concrete binding power It is smaller.And when using Ribbed Bar, the bond-anchorage effect between reinforcing bar and concrete is mainly that mechanical snap power provides, mechanical Bite force contribution rate reflects the degree that whether bond-anchorage is excellent between reinforcing bar and concrete.Since existing Rib Reinforced reinforcement is vertical Rib and cross rib are lower for bond-anchorage mechanical snap power contribution rate between armored concrete, and efficiency-cost ratio is not high, is unfavorable for building The disadvantages of increasing economic efficiency with production unit, to be unfavorable for reducing the construction cost of reinforced concrete structure building.With The development of Building technology, building tend to high stratification, enlargement and functionalization development, existing ribbed and are insufficient for growth requirement And mitigate the self weight of skyscraper and large span component, increase the efficiency-cost ratio of structure, reduce the dosage of material, it is anti-to improve building The special functional demands such as shock stability have seemed particularly significant, need a kind of substitution Rib Reinforced reinforcement and possess many superior functions Novel architecture reinforcing bar.

There are following several reinforcing bar rib-shaped structures in the prior art:

Utility model title: the four sides ribbed belt rib reinforcement with metering cross rib, application number 201610596750.9；Its main skill Art content are as follows: the technical problem to be solved by the utility model is to provide a kind of band metering cross rib four sides ribbed belt rib reinforcement, Reinforcing rib group with anchor force weak spot between dispersion Ribbed Bar and concrete, and have measurement band by reinforcing rib group The function of rib reinforcement length.

Utility model title: the Ribbed Bar that cross rib is staggered, application number 201610596787.1, application publication number: CN106049763A, main technical content are as follows: the Ribbed Bar that kind cross rib is staggered, which is characterized in that including reinforcing bar main body, edge The axially spaced-apart of the reinforcing bar main body is laid with multiple cross rib groups, and the cross rib group includes more cross ribs, the multiple cross rib group In, the adjacent cross rib group is radially staggered one first set angle along the reinforcing bar main body.

Utility model title: steel bar for concrete constructions, application number 87103154, application publication number: CN87103154, Main technical content: steel bar for concrete constructions, longitudinal section shape along its it is axial alternately with it is smoothly varying, have peak And paddy.

Utility model title: discontinuous longitudinal rib Ribbed Bar, application number 201610596652, application publication number CN106049761A, main technical content: more cross rib institutes are distributed with along the axially spaced-apart of the reinforcing bar main body in reinforcing bar main body The tip gap position for stating cross rib is equipped with longitudinal rib, and the longitudinal rib extends along the length direction of the reinforcing bar main body, and adjacent institute Longitudinal rib is stated to be spaced apart.

Utility model title: hot rolled multiple longtitudinal rib reinforcing bar, application number 95205104.4, main technical content: its shape knot Structure and existing ordinary hot steel rolling muscle with ribbing are essentially identical, are collectively constituted by reinforcing bar basic circle, cross rib, main longitudinal rib and secondary longitudinal rib, Be characterized in that except remain with common Ribbed Bar longitudinal and transverse rib, in addition to, increase between two original longitudinal ribs gone back two it is symmetrical The secondary longitudinal rib of distribution.

Utility model title: the production technology arrangement of three sides spiral with ribbing, application number 201410210872.0, application Publication No.: 103978030 A of CN, main technical content: the purpose of the utility model is to provide a kind of three sides spirals with ribbing Production technology arrangement, be able to batch three sides of production screw-thread steel with ribbing, and the Novel threaded that the utility model is produced Steel can be effectively eliminated more while surface quality, cross dimensions, strength grade greatly promote by its own style characteristic The security risk that direction external force bring reinforcing bar and concrete fall off.

Summary of the invention

The purpose of this utility model be it is in view of the above problems and insufficient, a kind of deformed bar with ribbing is provided, it is theoretical According to sufficiently, reasonable in design, with Concrete Bond Strength height, the few feature of consumable material be cannot only be applied to common Architectural engineering can also be applied to higher for shockproof requirements and other specific demands architectural engineerings, have preferable Overall economic efficiency.

In order to achieve the above objectives, it is adopted the technical scheme that:

A kind of deformed bar with ribbing, comprising: reinforcing bar ontology；With the conical rib being laid on the reinforcing bar ontology.

According to the utility model deformed bar with ribbing, it is preferable that the conical rib is in pyramid type or pyramid type, and the cone The top of shape rib is smooth fillets structure.

According to the utility model deformed bar with ribbing, it is preferable that along the axis direction of the reinforcing bar ontology, in the steel Equidistantly interval is laid with crossrib cell on muscle ontology, and each crossrib cell includes at least two cones being circumferentially uniformly arranged Shape rib.

According to the utility model deformed bar with ribbing, it is preferable that the conical rib in adjacent two crossrib cell is along axis Direction be correspondingly arranged or adjacent two crossrib cell in conical rib in circumferential direction in shifting to install or each cross rib Conical rib in unit is in the reinforcing bar body surface in the distribution setting of multiple tracks helix.

According to the utility model deformed bar with ribbing, it is preferable that be additionally provided with longitudinal rib on the reinforcing bar ontology.

According to the utility model deformed bar with ribbing, it is preferable that be laid at least twice longitudinal rib, institute on the reinforcing bar ontology Longitudinal rib is stated circumferentially to be uniformly arranged on the reinforcing bar ontology.

By adopting the above technical scheme, acquired beneficial effect is:

The reinforcing bar ribbed of conical rib disclosed in the utility model is different from common Rib Reinforced reinforcement, is possessing Rib Reinforced While reinforcing bar general performance, have with Concrete Bond Strength height, relative consumption material is few, i.e. the high feature of efficiency-cost ratio, no It only can be applied to common building engineering, can also be applied to higher for shockproof requirements and other specific demands buildings Engineering has preferable overall economic efficiency.

The conical rib modification reinforcing bar of the utility model can carry out symmetrical ribs design according to engine request is implemented, and have better Applicability, economy and intensity utilization efficiency etc..

The conical rib deformed bar of the utility model, is made of longitudinal rib and crossrib cell, and ribbed section is taper, can pass through Conical rib number is adjusted to be converted, by convert different reinforcing rib numbers realize be applied to different adhesion strength grade components or In structure.Physical test has been carried out to the utility model and theoretical model derives, ensure that the reliability of the utility model.

Detailed description of the invention

It, hereinafter will be to the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing simply introduced.Wherein, attached drawing is used only for showing some embodiments of the utility model, rather than will be originally practical new The whole embodiments limited to this of type.

Fig. 1 is one of the F-S curve synoptic diagram of different test specimens according to the utility model embodiment.

Fig. 2 is according to the two of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 3 is according to the three of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 4 is according to the four of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 5 is according to the five of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 6 is according to the six of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 7 is according to the seven of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 8 is according to the eight of the F-S curve synoptic diagram of the different test specimens of the utility model embodiment.

Fig. 9 is the spherical model according to the Rib Reinforced reinforcement of the utility model embodiment.

Figure 10 is the geometrical model according to the spherical model of the utility model embodiment.

Figure 11 is the d-R according to the Rib Reinforced reinforcement of the utility model embodiment_eqCurve.

Figure 12 is the physical model according to the plain bar of the utility model embodiment.

Figure 13 is the virtual cones model according to the Rib Reinforced of the utility model embodiment.

Figure 14 is the geometrical model according to the virtual cones of the utility model embodiment.

Figure 15 is the virtual rectangle model according to the Rib Reinforced of the utility model embodiment.

Figure 16 is the geometrical model according to the virtual rectangle of the utility model embodiment.

Figure 17 is the geometrical model evolution schematic diagram according to the different models of the utility model embodiment.

Figure 18 is the relationship according to the different types of equivalent radius of curvature and maximum binding force of the utility model embodiment Figure.

Figure 19 is the relational graph of the equivalent radius of curvature and efficiency-cost ratio according to the different ribbeds of the utility model embodiment.

Figure 20 is hot rolling Rib Reinforced reinforcement schematic diagram.

Figure 21 is one of the structural schematic diagram according to the deformed bar with ribbing of the utility model embodiment.

Figure 22 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 21.

Figure 23 is the second structural representation according to the deformed bar with ribbing of the utility model embodiment.

Figure 24 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 23.

Figure 25 is the third structural representation according to the deformed bar with ribbing of the utility model embodiment.

Figure 26 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 25.

Figure 27 is according to the four of the structural schematic diagram of the deformed bar with ribbing of the utility model embodiment.

Figure 28 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 27.

Figure 29 is one of the structural schematic diagram according to the deformed bar with ribbing of the utility model embodiment.

Figure 30 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 29.

Figure 31 is one of the structural schematic diagram according to the deformed bar with ribbing of the utility model embodiment.

Figure 32 is the cross-sectional configuration schematic diagram of the deformed bar with ribbing in Figure 31.

Serial number in figure:

100 be reinforcing bar ontology；

210 it is conical rib, 220 is longitudinal rib.

Specific embodiment

In order to enable the purpose of the technical solution of the utility model, technical characteristic and technical effect are clearer, hereinafter The attached drawing of the utility model specific embodiment will be combined, the exemplary scenario of the utility model embodiment is carried out clearly and completely Description.

The utility model is on the basis of existing hot rolling Rib Reinforced reinforcement, as shown in figure 20, by pull-out test, and establishes reason Mechanical snap power contribution λ, efficiency-cost ratio η are defined, the utility model cone-shaped model is obtained by deriving and calculating by model Ribbed has higher λ, η.

Define 1: the contribution λ of mechanical snap power is Ribbed Bar limit mechanical bite force F_mWith plain bar limit drawing Power F_CRBThe ratio between.

λ=F_m/F_CRB (1)

Define 2: reinforcing rib is to maximum bonded stress τ caused by original concrete_maxWith volume V shared by deformed steel rib The ratio between, i.e., the bond stress that unit volume reinforcing rib is contributed is known as the efficiency-cost ratio η of deformed bar.That is,

η=τ_max/V (2)

Pull-out experiment concrete match ratio when mechanics index of physics is given in table 1, and reinforced concrete structural element is come It says, since in a small range, test specimen is almost the same with ambient temperature, only considers the load acted on structural elements here That is mechanical energy, from Fig. 1-Fig. 8, we can obtain with being apparent destroys corresponding several stages: elasticity is strained with micro-elasticity Stage (chemical glue puts forth effort the stage), plasticity stage (mechanical snap power and frictional force active phase) and failure stage (coagulation The soil pressure broken stage).

1 pull-out experiment concrete match ratio of table when mechanics index of physics

Note: 1) m_C、m_FA、m_SC、m_SPCement, flyash, haydites of book structure and pottery sand are respectively indicated in 1m³Matter in concrete Amount/kg；W/B indicates water-cement ratio；Water-reducing agent is naphthalene series high-efficiency water-reducing agent, and volume is the 1.8% of cementitious material quality；

2)f_cu ^28d、f_ts ^28dRespectively indicate 28d cubic compressive strength (hereinafter referred to as compression strength), tensile splitting strength (hereinafter referred to as split tensile strength)/MPa；ρ_dIndicate dry apparent density/(kg/m³)。

One, spherical model

Rib Reinforced is equivalent to rigid spherical shape, as shown in Figure 8.Micro unit section L (AOB) is taken, and includes a complete crescent moon Rib；It is equivalent to a centre of sphere and is located at reinforcing steel bar center line, equivalent redius is the ball of R；Again by bond stress N suffered by reinforcing bar It is reduced to distributed load f (x)；Mechanical snap power F_mIt is reduced to be directed toward the centre of sphere, and is decomposed into axial force F_aWith radial force F_r；Micro- list The moment of flexure at the end first section B is M_B(its value is much smaller than the ultimate bending moment of reinforcing bar, because without brittle break occurs).Wherein, Rib Reinforced Equivalent steel ball rigidity it is big far beyond concrete, because without considering its own deformation.

1) mechanical snap power and frictional resistance collective effect stage

For apparent process of calculation analysis, for mechanical snap power and frictional resistance collective effect stage, and can be subdivided into Lower 3 stages.

1. then having when bond stress, which not yet transmits, reaches C point

By formula (3), formula (4), formula (5), can obtain

Wherein, μ indicates coefficient of friction, F between reinforcing bar and concrete interface_PFor bond stress.

2. then having as bond stress transmitting arrival arc CE one point D of centre and the midpoint not in arc

F_p=N_a+μN (7)

N_a=F_msinβ (8)

N_r=F_mcosβ (9)

Wherein, the boundary condition in formula (8)-formula (10) are as follows: x=l_C′A′+l_C′D′, β=α/2,0 < α < pi/2.The expression formula of N It is constant.T_BFor the end B torque.

3. the resultant force of mechanical snap power can be reduced to pass through arc after bond stress, which transmits, reaches E point (including E point) The midpoint D of CE and the line of centre of sphere O point, and it is directed toward the centre of sphere.At this point, cohesive force is in maximum value.

By Figure 10 and Fig. 9, can export

θ=2 α=2arccos (d/2R) (11)

l_C′A=l-l_C′E′/ 2=l-Rsin α/2=x_c (12)

l_C′D′=l-Rsin (α/4) cos (α/4) (13)

Wherein, point C ', E ' are respectively the projection of point C, E in x-axis.Therefore have

M_B=N (l-x)+N_r{l-[(l-Rsinα/4)/2+2Rsinα/4·cosα/4]} (14)

F_p=N_a+τ(N_r+ N)=τ π dx (15)

F_m=N_r/ (α/2 cos)=N_a/(sinα/2) (16)

It can be obtained by formula (3), formula (14)~formula (16)

2) the frictional resistance independent role stage

When mechanical snap power reaches certain value P, cataclastic failure phenomenon will occur in interface concrete, bond stress accordingly with Reduction；And the interface concrete in bond length is not enough to provide the mechanical snap masterpiece used time, bond stress will be only by rubbing Resistance provides, that is, enters the frictional resistance stress stage.At this point, x=l_a, and have

F=μ N=π τ dx (18)

Wherein, the expression formula of N is still constant.With slippage of reinforced bar, bond stress is gradually reduced, until bond damage, into Enter the residual stress stage.

Two, test is compared with theoretical analysis result

In order to further verify the correctness of above-mentioned model, discuss by taking actual experiment as an example here.By to crescent moon The maximum binding force of rib reinforcement and plain bar carries out asking poor, and maximum machine bite force can be obtained；Pass through equivalent the half of reinforcing bar again Thus diameter and bar diameter relationship and mechanical snap power so as to derive the optimum value of equivalent redius, and are verifying model just True property.Wherein, friction coefficient μ=0.213 between reinforcing bar and full lightweight concrete interface is taken.

Here by taking Rib Reinforced reinforcement and plain bar test specimen that LWCSB-2 group is respectively adopted as an example, the drawing of anchor bar Power calculated result is as shown in table 2.

2 LWCSB-2 group limit cohesive force of table

Wherein, in table 2: 1) F_lIndicate limit drawing (bonding) power/kN；2)F_CRBIndicate the limit drawing of Rib Reinforced reinforcement (bonding) power/kN；3)F_PSBIndicate limit drawing (bonding) power/kN of plain bar；4)F_mIndicate limit mechanical bite force/kN； 5)l_aFor reinforcing bar bond length/mm；6) d is reinforcing bar nominal diameter/mm；7) SF indicates cleavage fracture；8) λ indicates mechanical snap power Contribution rate/%.

As shown in Table 2, l_aLimit cohesive force when=50mm is compared with l_aIt is big when=100mm.This is because specimen molding is difference Batch, and filled because bobbin seal is not tight into cement slurry when pouring, to cause anchorage length inaccuracy and bonding Power increases.Therefore, in order to reliably be compared, only the same group test specimen of same batch is compared here, and with l_a=100mm When on the basis of, by taking Rib Reinforced reinforcement in LWCSB-2 and plain bar are calculated with the cohesive force of full lightweight concrete respectively as an example.

It is obtained by formula (1) calculating machine bite force contribution λ such as 2 result of table.

As it can be seen that the mechanical snap power of Rib Reinforced reinforcement to the contribution rate of cohesive force generally 95% or more, this with it is common mixed The conclusion for coagulating soil is almost the same.

Further, it by formula (17), can obtain

τ₁₂={ 23.871 [sinf (R)/2]+f_μ12}/(3.14×12×10^-2L), (19) d=12mm

τ₁₆={ 38.649 [sinf (R)/2]+f_μ16}/(3.14×16×10^-2L), (20) d=16mm

τ₂₀={ 56.934 [sinf (R)/2]+f_μ20}/(3.14×20×10^-2L), (21) d=20mm

Wherein, f (R)={ cos [arccos (d/2R)] }/2, F_m=τ dl；

L is a micro unit length,

f_μ12=0.213 × 23.871f (R)+1.512, (22)

f_μ16=0.213 × 38.649f (R)+1.366, (23)

f_μ12=0.213 × 23.871f (R)+1.512. (24)

According to actual measurement and statistical analysis, as d=12mm, l is taken₀=8mm；Work as d=16mm, when 20mm, takes l₀=10mm.

Wherein, l₀For micro unit length/mm in model；l_aFor total bond length/mm；F_efIt is viscous on a micro unit Tie power/kN.Thus have

X=f (R_eq)/2 (25)

28.871sinx₁+10.146x₁=0.519 (26)

38.649sinx₂+16.46x₂=2.636 (27)

56.834sinx₃+24.211x₃=5.089 (28)

F_ef=F/ (l_a/l₀) (29)

Calculate solving by Matlab software and obtain: x₁=0.013302, x₂=0.047842, x₃=0.062821； Equivalent redius when d=12mm, 16mm, 20mm is respectively R_eq=6.06mm, 8.08mm, 10.1mm.d-R_eqRelation curve is as schemed Shown in 11, shown in the relationship of the two such as formula (30).R_eqFor equivalent redius.

D=1.9802R_eq, R²=1.0000 (30)

D and R_eqStrong linear dependence show the model as shown in figure 11 and test data be accurately and reliably.

Three, model evolution is analyzed

On the basis of spherical model, developed cone-shaped model, rectangular model out by mathematical reasoning, and provide two kinds of models Physics reasoning process.

For the pull-out experiment of no lateral confinement, 4 stages can be equally divided by extracting to destroy.I.e. the first stage is to change It learns bond stage (ascent stage)；Second stage is mechanical snap power and frictional resistance collective effect stage (ascent stage), that is, viscous The maximum value for tying stress goes out at this stage；Phase III is frictional resistance independent role stage (descending branch)；Fourth stage is remaining viscous It ties stage of stress (stable section).

In order to simplify calculating analysis model, generally only with first three stress stage, and in the geometrical characteristic for considering reinforcing bar Under the conditions of, carry out static analysis.For the application only for second stage, three kinds of different evolutionary models carry out analytical calculation.Other The analytical calculation in two stages is all made of similar method and carries out.On the basis of the spherical radius of spherical model, develop another The foundation of outer two kinds of simplified models.

1) plain bar model

Plain bar is equivalent to the cylindrical body of a rigidity, at this point, making according to the bonding between plain bar and concrete With the physical model provided such as Figure 12.

At this point, the frictional force that cohesive force only exists bond stress offer is puted forth effort with the chemical glue between reinforcing bar and concrete.Its Unit length l₀Physical model it is as follows:

Bond stress are as follows:

2) the rigid cone-shaped model of Rib Reinforced

It is further that its is equivalent according to the spherical model of Rib Reinforced and the envelope evolving trend of its equivalent redius For cone-shaped model, as shown in figure 13.Wherein, micro unit section, which takes to set, requires same Fig. 9, similarly hereinafter.

The second stage that cohesive force is constituted still only is discussed here, i.e., is only analyzed from the mold segment after C point, similarly hereinafter.

When bond stress, which not yet transmits, reaches C point, calculating solution is still carried out using formula (3)~formula (6).

After bond stress is transmitted to C point, calculated in conjunction with Figure 14 and as follows.

F_a=F_msin[γ-(π/2-β)] (34)

F_r=F_mcos[γ-(π/2-β)] (35)

N_r=N+F_r (36)

F_p=N_a=μ (N+F_r)+F_a (37)

The frictional resistance independent role stage is still calculated using formula (18).

Wherein, geometrical boundary condition β=α/2,0 < β < pi/2 of formula (34), formula (35)；γ is vector EC and vector F_mBetween Angle, and have 0≤γ≤π；CF=EF, OC=OE=OF；The expression formula of N is still constant；Equivalent redius R is equivalent spherical Radius；N_r、N_aRespectively radial and axial resultant force.

3) the virtual rectangle model of Rib Reinforced

Similarly, Rib Reinforced is equivalent to virtual rectangular model, as shown in figure 15.

When bond stress, which not yet transmits, reaches C point, calculating solution is still carried out using formula (3)~formula (6).

After bond stress is transmitted to C point, calculated in conjunction with Figure 16 and as follows.

F_p=N_a=μ (N+F_r)+F_a (39)

N_r=F_r+N (40)

F_a=F_mcosβ (41)

F_r=F_msinβ (42)

Wherein, the geometrical boundary condition of formula (41), formula (42) are as follows:

OC=OE=OF=R, CG=HF=ME=R (1-cos α), CG is parallel to HF, and GH is parallel to CF；The expression formula of N is still It is so constant；Equivalent redius R still uses the equivalent redius of spherical model.

Wherein, N_aFor axial resultant force, N_rFor resultant radial force, β F_mWith axial angle.

Work as F_mWhen passing through CO and crossing centre of sphere O, β=(pi/2)-α, this up-to-date style (43) can be reduced to

Similarly, the frictional resistance independent role stage still uses formula (18) to be calculated.

4) the efficiency-cost ratio analysis of different models

According to the geometrical model evolving trend of above-mentioned Rib Reinforced model, as shown in figure 17.

In order to evaluate the material cost of unit length different distortion reinforcing bar, the raised volume of different models is counted respectively It calculates, as shown in formula (45)~formula (46).

Spherical model protrusion volume V_s:

V_s=2 π R³[sinα-(sin³α)/3-cos²αsinα] (45)

Cone-shaped model protrusion volume V_c:

Rectangular model protrusion volume V_r:

V_r=2 π R³sin³α (47)

Wherein, α=arccos (d/2R).

By d=1.98R_eqSubstitution formula (45), formula (46), formula (47) obtain following result:

V_b=0.0015d³； (48)

V_c=0.0011d³； (49)

V_r=0.0022d³。 (50)

It is (true by formula (48), formula (49), formula (50) respectively according to material volume V consumed by the different ribbeds of deformed bar It is fixed), and different ribbeds are to maximum bonded stress τ caused by original concrete_max(respectively by formula (17), formula (38), formula (44) determine), the efficiency-cost ratio η for obtaining deformed bar is shown in formula (2).

With the diameter d=16mm and anchorage length l of reinforcing bar in table 2_aFor=100mm, F is calculated by table 2_m= 38.649kN F_PSB=1.366kN.The maximum of different ribbeds is calculated in (being determined respectively by formula (16), formula (37), formula (42)) Bond stress is respectively τ_b,max=5.19/MPa, τ_c,max=5.51/MPa, τ_r,max=1.351/MPa.So its corresponding effect is taken It is then respectively η than η_b=0.84MPa/mm³；η_c=1.22MPa/mm³；η_r=0.15MPa/mm³。

In order to further intuitively comparing difference ribbed it is several can size, define the equivalent radius of curvature R of different ribbeds_rcAre as follows: With the public point of contact of circular arc on the vertex of equivalent conical rib model and equivalent spherical rib model, to equivalent spherical rib model the centre of sphere away from From.The equivalent radius of curvature R of different ribbeds_rcSize relation between its corresponding equivalent redius R, bar diameter d, such as table 3 It is shown.

The equivalent radius of curvature of 3 different equivalent ribbed of table and the relationship of equivalent redius and bar diameter

Maximum binding force when different equivalent radius of curvature can be so calculated separately out by formula (51), be respectively as follows: τ_b= 5.19/MPa；τ_c=5.51/MPa；τ_r=1.351/MPa.

τ_c=[1.366+38.649sin (γ -0.82)]/5.024 (51)

Its τ_max-R_rcRelationship is as shown in figure 18.

The equivalent radius of curvature R of different ribbeds_rcIt is then as shown in figure 19 with the relationship of efficiency-cost ratio η.

Figure 18 and Figure 19 is comprehensively compared it is found that not only gluing provided by cone-shaped model in these three equivalent ribbed models Tying power is maximum, and its efficiency-cost ratio is also maximum, thus is economy, a kind of rib the most reliable in engineering the most in production Shape.Table 4 gives in architectural engineering common several bar diameters in the asynchronous efficiency-cost ratio of ribbed, therefrom have one it is more straight The understanding of sight.

Efficiency-cost ratio η of the reinforcing bar of 4 different-diameter of table in different equivalent ribbed

By the above theory deduction, obtaining cone-shaped model rib is best model.

The application now provides a kind of new reinforcing steel bar ribbed as a result, particularly: this application discloses a kind of deformed steels with ribbing Muscle includes reinforcing bar ontology 100 and the conical rib 210 that is laid on the reinforcing bar ontology, and the conical rib in the present embodiment is specially to be in Pyramid type or pyramid type, and the top of the conical rib is smooth fillets structure, in actual mould design, is substituted with obtuse angle, It prevents from stabbing construction personnel when construction.

Along the axis direction of the reinforcing bar ontology 100, equidistantly interval is laid with cross rib on the reinforcing bar ontology 100 Unit, each crossrib cell include at least two conical ribs 210 being circumferentially uniformly arranged, in adjacent two crossrib cell Conical rib 210 be correspondingly arranged in the axial direction or adjacent two crossrib cell in conical rib 210 circumferential direction in mistake Conical rib 210 in position setting or the crossrib cell is in the reinforcing bar body surface in the distribution setting of multiple tracks helix.This reality Example is applied to be stressed with linear distributing conical rib 210.And it is embodied respectively in following specific embodiments pair It should be arranged and shift to install two different forms

Further, it is additionally provided with longitudinal rib 220 on the reinforcing bar ontology of the application, is laid at least two on the reinforcing bar ontology Road longitudinal rib 220, the longitudinal rib 220 are circumferentially uniformly arranged on the reinforcing bar ontology 100.

In the circumferential direction of reinforcing bar ontology, the conical rib in multiple tracks longitudinal rib and single crossrib cell can common equal part point Cloth respectively independently can also carry out etc. point laying on the outer peripheral surface of reinforcing bar ontology to the outer peripheral surface of reinforcing bar ontology.

Specifically, it is divided into following example to be implemented.

Example one: symmetric double face conical rib, by the attached conical rib of round rebar surface, a face for taking steel bar column to cross the longitudinal axis is Reference planes are arranged conical rib in the rebar surface for being symmetrical with plane respectively, and longitudinal rib are arranged on made even face, such as Figure 21 and Shown in Figure 22.

Example two: symmetrical four sides conical rib, by the attached conical rib of round rebar surface, a face for taking steel bar column to cross the longitudinal axis is Conical rib is arranged in the rebar surface for being symmetrical with plane respectively in reference planes, then taking the plane vertical with the plane of reference is benchmark face, Respectively symmetrically conical rib is arranged in the rebar surface of the datum plane, and longitudinal rib is arranged on made even face, such as Figure 23 and Figure 24 institute Show.

Example three: symmetrical octahedral conical rib, by the attached conical rib of round rebar surface, a face for taking steel bar column to cross the longitudinal axis is Reference planes extract the other three face in space, reinforcing bar column space are divided into eight regions, each region corresponds to rebar surface Conical rib is set, and longitudinal rib is set on made even face.As illustrated in figs. 25 and 26.

Example four: symmetrical intensive conical rib, by the attached conical rib of round rebar surface, a face for taking steel bar column to cross the longitudinal axis is Reference planes extract the other n face in space, reinforcing bar column space are divided into 2n region, each region corresponds to rebar surface Conical rib is set, no longer setting longitudinal rib.That is when n > 3, i.e., referred to as intensive conical rib.As shown in Figure 27 and Figure 28.

Example five: the attached conical rib of round rebar surface is taken steel bar column to cross a face of the longitudinal axis as reference by four sides plum blossom rib Conical rib is arranged in the rebar surface for being symmetrical with plane respectively in plane, then taking the plane vertical with the plane of reference is benchmark face, respectively Conical rib (this rib is set as the interval plum blossom rib such as Figure 18) is arranged in the rebar surface of the symmetrical datum plane, and on made even face Longitudinal rib is set, as shown in Figure 29 and Figure 30.

Example six: the attached conical rib of round rebar surface is taken steel bar column to cross a face of the longitudinal axis as reference by octahedral plum blossom rib Plane extracts the other three face in space, reinforcing bar column space is divided into eight regions, each region corresponds to rebar surface setting Conical rib (this rib is set as the interval plum blossom rib such as Figure 19), and longitudinal rib is set on made even face.As shown in Figure 31 and Figure 32.

Following table 5-table 11 gives the parameter of different-diameter, different taper rib reinforcements.

5 design diameter of table is the different conical rib reinforcement parameters of 12mm

Note: d indicates bar diameter；d₀Indicate reinforcing bar internal diameter；H indicates that cross rib is high；h₁Indicate that longitudinal rib is high；l₀Indicate rib spacing； B indicates that cross rib is wide；A indicates that longitudinal rib is wide.

6 design diameter of table is the different conical rib reinforcement parameters of 14mm

7 design diameter of table is the different conical rib reinforcement parameters of 16mm

8 design diameter of table is the different conical rib reinforcement parameters of 18mm

9 design diameter of table is the different conical rib reinforcement parameters of 20mm

10 design diameter of table is the different conical rib reinforcement parameters of 25mm

11 design diameter of table is the different conical rib reinforcement parameters of 25mm

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, same or similar part may refer to each other between each embodiment.

Unless otherwise defined, the technical term or scientific term used herein is should be in the utility model fields The ordinary meaning that personage with general technical ability is understood.Used in present specification and claims "one" or The similar word such as person " one " also not necessarily indicates quantity limitation.The similar word such as " comprising " or "comprising" means the word occur The element or object of front are covered the element for appearing in the word presented hereinafter or object and its are equal, and are not excluded for other elements Or object." connection " either the similar word such as " connected " not now schedules physics or mechanical connection, but can wrap Electrical connection is included, it is either direct or indirect."upper", "lower", "left", "right" etc. are only used for indicating that relative position is closed System, after the absolute position for being described object changes, then the relative positional relationship may also correspondingly change.

It is described in detail the exemplary embodiment of the utility model above in reference to preferred embodiment, however this field Technical staff can make above-mentioned specific embodiment more it will be appreciated that under the premise of without departing substantially from the utility model theory Kind of modification and remodeling, and can to the utility model proposes each technical characteristic, structure carry out multiple combinations, and without departing from this reality With novel protection scope, the protection scope of the utility model is determined by the attached claims.

Claims (5)

1. a kind of deformed bar with ribbing characterized by comprising

Reinforcing bar ontology；

With the conical rib being laid on the reinforcing bar ontology;

The conical rib is in pyramid type or pyramid type, and the top of the conical rib is smooth fillets structure.

2. deformed bar with ribbing according to claim 1, which is characterized in that along the axis direction of the reinforcing bar ontology, Equidistantly interval is laid with crossrib cell on the reinforcing bar ontology, and each crossrib cell includes at least two circumferentially uniformly distributed The conical rib of setting.

3. deformed bar with ribbing according to claim 2, which is characterized in that the conical rib in adjacent two crossrib cell Be correspondingly arranged in the axial direction or adjacent two crossrib cell in conical rib in circumferential direction in shifting to install or each institute The conical rib in crossrib cell is stated in the reinforcing bar body surface in the distribution setting of multiple tracks helix.

4. deformed bar with ribbing according to claim 1 to 3, which is characterized in that be additionally provided on the reinforcing bar ontology Longitudinal rib.

5. deformed bar with ribbing according to claim 4, which is characterized in that be laid at least twice on the reinforcing bar ontology Longitudinal rib, the longitudinal rib are circumferentially uniformly arranged on the reinforcing bar ontology.