Spiral stirrup calculation formula, what is the spiral stirrup length calculation formula?

1. Calculation method of spiral stirrups: In cylindrical components (such as graphic columns, pipe strings, cast-in-place piles, etc.), the spiral stirrups are wound along the circumferential surface of the main reinforcement, and the length of the spiral stirrups per meter of steel skeleton length can be calculated as follows:

l=2000лa/p×[1-e^2/4-3/64(e^2)^2 –5/256(e^2)^3]

where a= (p 2+4d 2) 4

e2=(4a^2-d^2)/( 4a^2)

where l - the length of the spiral stirrup per 1m of the length of the reinforcement skeleton ( ).

p - pitch ( ).

Pi, take;

d - the winding diameter of the spiral; The center distance of the stirrups is used, that is, the distance between the outer skin of the main reinforcement plus the diameter of one stirrup ( ).

The last item in parentheses, 5 256(e 2) 3, is small and is generally omitted from the calculation.

2. Simple calculation method of spiral stirrups.

Method 1, the length of the spiral stirrup can also be calculated according to the following simplified formula:

Total length = 1000 p(d)2+p2+ d2

where d is the diameter of the spiral stirrups;

The meaning of other symbols is the same as above.

Method 2, for members with less strict stirrup spacing requirements, or when the ratio of p to d is small (p d, the stirrup length can also be calculated according to the following approximate formula:

Total length = n p 2 + ( d) 2 Other symbols have the same meaning. Indicates the consciousness of the power side.

Total length of spiral stirrups.

n×√ 2×π×d-2×15) 2×

l: The total length of the spiral bar.

n: Number of turns of the spiral n=l b

b: The distance between the spiral bars, the pitch.

d: The diameter of the concrete column.

d: The diameter of the spiral bar.

Spiral reinforcement concrete protective layer 15, in spiral reinforcement, there is a horizontal circle up and down respectively, and this amount must be counted. Add two more hook lengths to the total amount of reinforcement for the spiral bars. There is also a lap length that increases according to the construction situation on site.

In fact, the spiral is a triangle.

SpiralStirrupsThe formula is calculated as follows: l=n(p 2+(d-2a-2d) 2* 2) (1 2)+2*stirrup end hook length n -- spiral stirrup number of turns d--cylindrical diameter p--Pitchd--stirrup diameter a--protective layer where " indicates the power.

1. Steel cage.

Spiral stirrup length calculation formula.

The square of the circumference of a single turn plus the square of the stirrup spacing, the result of the root number, you can get the length of the single turn, and finally use the length multiplied by the total number of turns to get the total length of the spiral stirrups of the reinforcement cage. When calculating, you need to measure the diameter of the reinforcement cage first, and then you can calculate the circumference of the single turn, so the measurement must be accurate.

Second, the safety measures for reinforcement cage binding.

1. When binding the steel cage, all raw materials must be sampled in accordance with the requirements of the specification before being put into use, so as to ensure that the quality is qualified and the strength meets the design standards before they can be put into use.

2. When the main reinforcement is processed, it is necessary to cut the material according to the segment length of the reinforcement cage to avoid the shortage of materials and too many materials. In addition, during the end processing, it is necessary to ensure that the size of the main reinforcement meets the standard, and the processing technology of the end meets the design requirements.

3. All fixed staff participating in the reinforcement cage binding must undergo professional training to understand the construction safety measures.

lashing specifications and related safety requirements, etc.

4. For the equipment and tools used in the lashing process, they need to be maintained in the near future to ensure the normal operation of the equipment. And before using the equipment, you also need to check whether the power supply is turned on again, especially the ground wire, and be sure to ensure that it is connected normally to avoid safety accidents.

5. After the completion of the first project, it is necessary to make a summary, and then strengthen the quality inspection work according to the actual situation, especially when unloading the cage, it is necessary to arrange the acceptance in time and carry out repair welding.

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What is the formula for calculating the length of a spiral stirrup?

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Calculation formula for the length of the spiral stirrup base Spiral stirrup length is stupid: l= (the length of the encrypted high rotten area and the spacing of the encrypted area +1) sqrt( component diameter - protective layer 2 + stirrup diameter) 2 + the spacing of the infill area 2) + (the length of the non-encrypted area and the spacing of the non-encrypted area + 1) sqrt(

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The formula for calculating the spiral stirrup: Total length of the spiral stirrup = n +2 d-2 15) + 2 l: The vertical height from the start point to the end point of the spiral stirrup n:

The number of turns of the spiral bar n=l b b: the distance between the spiral bars, the pitch d: the diameter of the concrete column d:

The diameter of the spiral bar is generally 15 for the protective layer of spiral reinforced concrete, and there is a horizontal circle above and below the spiral bar, which must be counted. Add two more hook lengths to the total amount of reinforcement for the spiral bars. There is also a lap length according to the on-site construction situation.

In fact, the spiral is a triangle.

How do you calculate spiral stirrups? What is the calculation formula?

Answer] Total length of spiral stirrups = n +2 d-2 15) + 2 : height of spiral bars n: number of turns of spiral bars n=l bb:

The distance between the spiral bars, the pitch d: the diameter of the concrete column d: the diameter of the spiral bars The spiral bar concrete protective layer 15, among the spiral bars, there is a horizontal circle up and down respectively, and this amount must be calculated.

Add two more hook lengths to the total amount of reinforcement for the spiral bars. There is also a lap length that increases according to the construction situation on site. In fact, the spiral is a triangle.

You can also use the Pythagorean theorem to simplify the equation: l = h square + (dn) square, and then open the square after the formula is calculated. where:

l is the length of the spiral stirrup, h is the vertical height from the beginning to the end of the spiral stirrup, is the circumferential spine of the circle, the absent attitude rate d is the diameter of the spiral stirrup, n is the number of winding turns of the spiral stirrup.

Spiral stirrups are calculated as follows: number of spiral stirrups (n): n = d * l) s; Length of spiral stirrup (ls):

ls = d；Diameter of the spiral stirrup (ds) :d s = * fck) *d) fy.

Spiral stirrup calculation formula refers to the parameters and formulas required to calculate the spiral stirrup, and is displayed in a ** way. Spiral stirrups are a common reinforcement method used in concrete structures to increase the bearing capacity and seismic performance of the structure.

The specific formula** is as follows:

1. The number of spiral stirrups (n): n = d * l) s.

Where, is the pi (take the approximate value as, d is the diameter or side length of the concrete member, l is the height or length of the concrete member, and s is the spacing of the spiral stirrups.

2. The length of the spiral stirrup (ls): ls = d.

where d is the diameter or side length of the concrete member.

3. The diameter of the spiral stirrup (ds) :d s = * fck) *d) fy.

where fck is the design value of the compressive strength of the concrete, d is the diameter or side length of the concrete member, and fy is the design value of the tensile strength of the spiral stirrups.

Other calculation methods for spiral stirrups

1. Strength calculation of spiral stirrups: The strength calculation of spiral stirrups usually adopts the calculation method of bending compression members. According to the shape of the interception balance surface, the material properties and the stress state of the spiral stirrups, the strength of the spiral stirrup can be calculated by using the formula or calculation method of appropriate defeat and vertical construction.

2. Calculation of the spacing of the spiral stirrups: The spacing of the spiral stirrups should be determined according to the requirements of the structure and the specifications of the reinforcement. In general, the spacing of the spiral stirrups should meet the structural requirements of the reinforcement and the specified minimum spacing.

3. The arrangement of the spiral stirrups: the arrangement of the spiral stirrups can be determined according to the stress and design requirements of the structure. Common layout methods include equal spacing arrangement, variable spacing arrangement, variable diameter arrangement, etc.

1) The calculation formula of spiral stirrups: l=n(p 2+(d-2a-2d) 2* 2) (1 2)+2*stirrup end hook length n--spiral stirrup number of turns d--cylindrical diameter p--pitch pitch d--stirrup diameter a--protective layer where " indicates the power.

2) Total length of spiral stirrups =n +2 d-2 15)+2 l: height of the spiral bar n: number of turns of the spiral bar n=l b b:

The distance between the spiral bars, the pitch d: the diameter of the concrete column d: the diameter of the spiral bars The spiral bar concrete protective layer 15, in the spiral bar, there is a horizontal circle up and down, and this amount must be calculated.

Add two more hook lengths to the total amount of reinforcement for the spiral bars. There is also a lap length that increases according to the construction situation on site.

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