How to calculate the length of the beam stirrup encryption area

1.The encryption range is based on the specification, and there is no specific formula for calculating it.

The stirrup infill range is: the length of the column root infill area of the bottom column (the taproot of the bottom column refers to the top surface of the basement or the top surface of the foundation without a basement) should not be less than 1 3 of the net height of the column in this layer, and the subsequent infill range is based on the maximum value of the column length (the diameter of the column), the net height of the floor column 1 6 and 500mm.

2.Beam stirrup encryption range:

The infill range starts from the edge of the column, and the infill length of the frame beam stirrups with a seismic rating of 1 is 2 times the beam height, 2,

3.Conditions that need to be met for the seismic rating.

The seismic rating is:

The length of the stirrups of the third and fourth frame beams is several times of the beam height, and all cutouts must meet the requirements of greater than 500mm. If it does not meet the requirements greater than 500 mm, the 500 mm length is encrypted.

4.Design of foundation stirrups required by seismic ratings.

For the structure of seismic fortification, in order to improve the bearing capacity of the frame joint and the seismic capacity of the structure, sufficient stirrups need to be configured.

5.The range of reference values for the frame.

The stirrup infill area in the frame should be within the maximum range where the height of both ends of the column is equal to the size of the long side of the rectangular section or the diameter of the cylindrical section and the clear height of the column in mm.

6.Master the length of the encrypted area.

The stirrup infill area in the frame should be within the range of 2 times the height of the end beam of the first-level frame beam and the times of the height of the end beam of the second-fourth frame beam. The stirrups should be encrypted, and the length of the encryption area should not be less than 500mm. The first stirrup should be set within 50mm of the edge of the node.

7.Lap length range.

For lashing joints, the stirrup spacing within the lap length of the rebar should not be greater than 100mm.

The encryption range is specified in the specification, and there is no specific calculation formula.

The infill range of the column stirrups is: the length of the column root infill area of the bottom column (the taproot of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the subsequent infill area is the maximum of the three values of the column length (diameter of the cylinder), 1 6 of the net height of the floor column, and 500mm.

The encryption range is specified in the specification, and there is no specific calculation formula.

The length of the infill area of the root of the bottom column (the taproot of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the subsequent infill area is the maximum of the three values of the column length (diameter of the column), 1 6 of the net height of the floor column, and 500mm.

For the ends of the columns of the reinforced concrete frame and the ends of each layer of beams, they were infilled. When the seismic grade is level 1, the beam height and 500mm of the length of the infill area is 2 times and the greater value is taken, and when the seismic grade is 2 or 4, the beam height of the length of the infill area is the greater value of 500mm.

Stirrup encryption areaThe length is specified in accordance with the Megaguess specification, and there is no specific calculation formula.

Frame beams. The stirrup infill area should be within the range of 2 times the beam height of the first level frame beam end and the range of the height of the second and fourth frame beam ends, the stirrups should be encrypted, and the length of the infill area should not be less than 500mm, and its first stirrup should be set within 50mm from the edge of the node; For the rebar lap length of the lashing joint, the stirrup spacing should not be more than 100mm.

Stirrup encryption areaIt is for seismic structures. According to the seismic rating.

The rules for setting the stirrup encryption area are also different. In general, for reinforced concrete.

The ends of the columns of the frame and the ends of each layer of beams are insulated. When the seismic grade is level 1, the length of the infill area is 2 times the beam height and 500mm takes the large value, and when the seismic grade is 2 or 4, the length of the infill area is the beam height of the times and 500mm takes the large value of the family hand.

1. The encryption range of the stirrups is:

The length of the column root infill area of the bottom column (the root of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the infill area after is the maximum of the three values of the column length (diameter of the cylinder), 1 6 of the net height of the floor column, and 500mm.

2, stirrup encryption area in frame beam should be within the range of 2 times the height of the first level frame beam end and within the range of the height of the second and fourth level frame beam end, stirrups should be encrypted, and the length of the encryption area should not be less than 500mm, and its first stirrup should be set within 50mm from the edge of the node; For the rebar lap length of the lashing joint, the stirrup spacing should not be greater than 100mm.

Hope it helps.

1. The encryption range of the stirrups is:

The length of the column root infill area of the bottom column (the root of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the infill area after is the maximum of the three values of the column length (diameter of the cylinder), 1 6 of the net height of the floor column, and 500mm.

2, stirrup encryption area in frame beam should be within the range of 2 times the height of the first level frame beam end and within the range of the height of the second and fourth level frame beam end, stirrups should be encrypted, and the length of the encryption area should not be less than 500mm, and its first stirrup should be set within 50mm from the edge of the node; For the rebar lap length of the lashing joint, the stirrup spacing should not be greater than 100mm.

Hope it helps.

Hello dear! I'll give you a rough answer, I'm glad you asked! How to calculate the length of the stirrup encryption area; The number of stirrups in the upper infill area is calculated as 1, the length of the infill area = max (the net height of the hidden column is 6, the size of the long side of the column section, 500) + the height of the beam 2, the number of stirrups = the length of the infill area, the value of 1 is taken according to the decimal place 3, and the length of the upper infill area is recalculated = the length of the infill spacing * the number of stirrups in the lower part of the infill area is calculated 4, and the length of the infill area = max (the net height of the column is 6, the size of the long side of the column section, 500) + the height of the beam.

The length of the encrypt area of the frame is specified in the 11G101-1 atlas as follows:

1. The encryption range of the stirrups is:

The length of the column root infill area of the bottom column (the root of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the subsequent infill area is the maximum of the three values of the column according to the size of the long side of the column (the diameter of the cylinder is large), the net height of the floor column is 1 6, and 500mm.

2. Stirrup encryption area in the frame beam.

Should be a frame beam end 2 times beam height range and two or four frame beam end times beam height range, stirrups should be encrypted, and the length of the encryption area should not be less than 500mm, and its first stirrup should be set within 50mm away from the edge of the node; For the length of the rebar lap of the lashing joint.

The stirrup spacing within the range should not be greater than 100mm.

Precautions. The encryption range is specified in the specification, and there is no specific calculation formula. Pillar.

And the setting method of stirrups in the infill area of the beam is:

KZ, QZ, LZ stirrup encryption.

1. The encryption range of the stirrups is:

The length of the column root infill area of the bottom column (the root of the bottom column refers to the top surface of the basement or the top surface of the foundation without the basement) should not be less than 1 3 of the net height of the column in the layer, and the range of the infill area after is the maximum of the three values of the column length (diameter of the cylinder), 1 6 of the net height of the floor column, and 500mm.

2. Beam stirrup encryption range:

The encryption range starts from the edge of the column and is a level of seismic resistance.

The frame burning vertical beam stirrup encryption length is 2 times the beam height, the frame beam stirrup encryption length of the second, third and fourth seismic grade is the beam height of times, and the total length of the encryption interval should be greater than 500mm, if it is not satisfied with greater than 500mm, the length of 500mm is encrypted.

3. For details, please refer to the National Building Standard Design Atlas.

16g101-1》。

4. The specific encryption and trouser height should also be designed according to the structure.

and should meet the requirements of the specification.

If it is calculated manually, add 6 after calculating according to the spacing of the drawing, and the leakage signal encryption will be within the scope of encryptionStirrupsThe spacing becomes smaller.

Stirrups regardless of size, several limb stirrups, large stirrups set small stirrups, open rectangular stirrups, closed rectangular stirrups, diamond stirrups, polygonal.

Stirrups, tic-tac-toe stirrups and round stirrups, etc., are all a method of encryption when doing it in the binding hall. Because encryption is only different in spacing, only the size and length of the encryption spacing. Stirrups are used on columns and beams, and encryption is of course also on columns, beams.

Precautions for rebar binding

Check whether the steel number, diameter, number of roots, spacing and position of the steel bar are correct according to the structural drawings, in this process, we must be careful, check each beam and each plate in place, mainly pay attention to the binding position of the steel bar, and avoid the steel bar binding errors caused by the unskilled drawing of workers.

Check whether the joint position of the steel bar meets the requirements, and the lap length must meet the requirements of the specification, but it will cause engineering losses if it is too long, and check whether the reinforcement cushion block binding meets the requirements, so as to ensure the thickness of the protective layer.

Check whether the binding of the steel bar is firm, and drag it by hand to observe whether it is loose.

Length of the encrypted zone = full length - non-encrypted zone. Encryption is for earthquake-resistant structures. Depending on the level of seismic resistance, the regulations for encryption are different.

In general, the ends of the beams of the reinforced concrete frame and the ends of each layer of columns are infilled. The length of the infill area at the end of the beam is generally times the beam height.

The length of the column infill area is generally 1 6 The height of the column on each floor. But the root of the lowest (first) pillar should be taken 1 3 height. In exceptional cases, the bars should also be fully encrypted.

The length of the stirrup infill zone of the hinged row frame column of the concrete structure is specified as follows:

1. For the section at the top of the column, take 500mm below the top of the column, and not less than the cross-sectional height of the top of the column.

2. For the crane beam section, take the root of the upper column to 300mm above the top surface of the crane beam.

3. For the column root section, take the top surface of the foundation to 500mm above the indoor floor.

4. For the corbel section, take the full height of the corbel.

5. For the nodes connected between the columns and the columns and the parts where the column displacement is constrained, take 300mm above and below the nodes.