How to calculate the theoretical weight of the rebar, how to calculate the theoretical weight of the

This is multiplied by the square of the diameter of the steel bar (mm), which is the weight of the circle 10 steel bars per meter, and the weight of the steel bar is proportional to the square of the diameter (radius). g = , weight per meter (kg) diameter of steel bar (mm) diameter of steel bar (mm), in fact, it is very simple to remember the weight of steel bars commonly used in construction projects 6 kg 8 10 12 14 16 18 24

The weight of 1 meter of rebar is: diameter x diameter.

Multiply the square of the diameter of the rebar (mm) by is the weight of the circle 10 rebar per meter.

The calculation of the theoretical weight of the steel bar is too simple, which is the density of the steel bar.

16=18=2kg

20=22=3kg25=

Weight per linear meter: kg of the square of the diameter

It is an important data in the calculation of the theoretical weight of the steel bar, which is calculated based on the weight per meter of the 10mm diameter steel bar converted into the theoretical weight of the 1mm diameter steel bar. Calculate the theoretical weight of other diameter reinforcement and convert it mathematically.

That is, there are two assumptions in the calculation of the theoretical weight of g=10mm rebar: 1Rebar is a homogeneous material, 2The specific gravity is;

In this way, the shroud can be chained to calculate g= *10 100) 2 4*10*, that is, the volume of each meter of steel bar is converted to cubic decimeters (dm3) and then the weight is calculated.

Then change to the theoretical weight of the 1mm diameter steel bar =

Since the theoretical revisiting base amount is calculated according to the length of 1m, the theoretical weight of the steel bars is only proportional to their cross-sectional area, that is, proportional to the square of the diameter. i.e. g = square of the diameter.

This should be clear.

The Reinforcement Theory Weighing Scale is a reference table that describes the diameter and weight per meter of reinforcement.

Weight per meter (kg) = diameter of the steel bar (mm) The diameter of the steel bar (mm), that is, the weight of the steel bar is proportional to the square of the diameter. At the same time, the theoretical weight of the reinforcement (kg) cross-sectional area [*reinforcement radius (mm) * reinforcement radius (mm)].

The theoretical weight of steel is calculated based on the nominal size and density of the steel (in the past known as specific gravity), and the weight is called theoretical weight. This is directly related to the length dimensions, cross-sectional area and allowable deviation of the dimensions of the steel. Due to the allowable deviation of the steel during the manufacturing process, the theoretical weight calculated by the formula is different from the actual weight, so it is only used as a reference when estimating.

The weight of the rebar is calculated as follows:

Diameter (mm) * Diameter (mm) * Length of rebar (m) = Rebar weight (kg).

w = (1 4) is the diameter of the reinforcement in centimeters, and the result is kilograms in meters )

Steel bars are mainly subjected to tensile stresses in concrete. Due to the action of ribs, the deformed steel bar has a greater bonding ability with concrete, so it can better withstand the action of external force. Steel bars are widely used in various building structures.

Especially large, heavy, lightweight, thin-walled and high-rise building structures.

1. The theoretical weight of the steel bar is calculated by multiplying the square of the diameter of the steel bar (mm).

Weight per meter (kg) Diameter of rebar (mm) Diameter of rebar (mm).

2. The theoretical weight of steel is calculated according to the nominal size and density of steel (called specific gravity in the past), and the weight calculated by the manuscript is called theoretical weight. This is directly related to the length dimension, cross-sectional area and allowable deviation of the steel form. Due to the allowable deviation of steel in the manufacturing process, there is a certain discrepancy between the theoretical weight calculated by the formula and the actual weight, so it is only used as a reference when estimating.

3. The actual weight of steel refers to the weight obtained by actual weighing (weighing) of steel, which is called actual weight. The actual weight is more accurate than the theoretical weight.

The formula for calculating the theoretical weight of the rebar is as follows:

Theoretical weight (unit: kg) = length (unit: m) cross-sectional area (unit: square meters) density (unit: kilograms, cubic meters). It is important to note that the density of reinforcement may vary for different types and specifications.

Here are some common density values for rebar:

1. The density of ordinary carbon steel bars (such as HRB335, HRB400, etc.) is about 7850 kg cubic meters.

2. The density of stainless steel bars is about 7700 kg cubic meters.

The weight calculation formula of the steel bar can adopt different formulas according to different cross-sectional shapes. The following are several common steel bar cross-sectional shapes and corresponding weight calculation formulas:

1. Circular reinforcement: If the reinforcement is a circular section, the calculation formula is:

Theoretical weight (unit: kg) = length (unit: meter) radius squared density.

2. Square reinforcement: If the reinforcement is a square section, the calculation formula is:

Theoretical weight (unit: kg) = length (unit: meters) side length squared density.

3. Isosceles triangle reinforcement: If the reinforcement is an isosceles triangle section, the calculation formula is:

Theoretical weight (unit: kilokirk) = length (unit: m) bottom edge length height density.

The parameters in the above formula need to be replaced according to the specific reinforcement specifications and density values to obtain an accurate theoretical weight. At the same time, it is also necessary to consider the waste rate of steel bars, connection loss and other factors in the actual project to ensure the accuracy and safety of the project. Please note that the above is a general formula for calculating the weight of rebar and is not applicable to all special cases.

In actual engineering, it is recommended to consult a professional engineer or use relevant calculation software to make accurate reinforcement weight calculations.

The main role of rebar

1. Enhance the strength and toughness of concrete: Steel bars are usually embedded in concrete structures to enhance the strength and toughness of the structure by interacting with concrete. Concrete has a high compressive strength, while steel has a high tensile strength, and the combination of the two can form complementary structural materials.

2. Control and prevent the generation and expansion of cracks: Due to its own nature, concrete is prone to cracks under the influence of external forces. By adding reinforcement to the concrete, the formation and propagation of cracks can be controlled and prevented, and the stability and durability of the structure can be improved.

3. Provide seismic performance: the steel bar can absorb and disperse the energy under the action of the first grade, thereby protecting the structure from loss. Proper configuration and arrangement of reinforcement can increase the seismic performance of the structure and improve the safety of the building.