Why is the stirrup spacing in the infill area of the frame beam smaller and denser the beam height?

The higher the beam, the greater the load-bearing! Of course, encryption is even more needed.

The stirrup encryption area of the frame beam, this is subject to certain regulations. The specific provisions are as follows: the encryption range starts from the column edge, the frame beam stirrup encryption length of the first-level seismic grade 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 the times, and the total length of the encryption interval should be greater than 500mm, if it is not greater than 500mm, the length of 500mm is encrypted.

The stirrup infill zone is for seismic structures. Depending on the seismic level, the regulations for setting the stirrup encryption zone are also different. In general, the ends of the columns of the reinforced concrete frame and the ends of each layer of beams are infilled.

Hope it helps.

Frame structure. The distance between the stirrups in the non-infill area of the column is 2 times or no more than 2 times the stirrup spacing in the infill area.

The stirrups of the column should first be calculated and determined according to the provisions of the basic seismic structural measures of the frame structure.

See GB50011-2010 Code for Seismic Design of Buildings

6 3 Zai early 9 column stirrup configuration, should also meet the following requirements:

Use the eigenvalues specified in the table.

v calculates the volume clamp ratio pv, and the resulting diameter and spacing must conform to the table.

There are two scenarios:1) When the main reinforcement and stirrups are hooked at the same time, the length calculation formula is as follows:

Tendon length = (h [beam width] - protective layer * 2 + 2d1) jujube + seismic hook length] * d * 2 d1 is the stirrup diameter.

2) When the tension only hooks the main reinforcement, its length calculation formula is as follows:

Tendon length = (h [beam width] - protective layer * 2) + seismic hook length] * d * 2 <>

Frame beam stirrup encryption area.

The range is directly related to the seismic rating of the structure.

The length of the frame column is calculated, the shear span ratio is Qiaoqing, whether the angle column is held in a late manner, whether it is the bottom layer, whether the bottom layer has a rigid ground, whether it is a short column, whether it is a frame pillar and so on.

Both ends of the frame support beam stirrup beam need to be encrypted. The infill range of the beam stirrups is: starting from the edge of the column, the frame of the frame is required to be upgraded with a seismic grade.

The stirrup encryption length is 2 times the height of the beam, and the stirrup encryption length of the frame beam of the second, third and fourth seismic grades is the height of the beam, and all should meet the requirements of greater than or equal to 500mm, if not satisfied greater than or equal to 500mm, the length of 500mm should be encrypted.

Hello dear, let you wait for a long time, I am happy to answer <> for you

The length of the beam stirrup encryption zone refers to the length of the transfer interval of the stirrup encryption on the beam. In order to ensure the mechanical performance of the beam, the stirrups need to be encrypted within a certain distance, and this distance is the length of the beam stirrup encryption area. The following is how to calculate the length of the beam stirrup encryption area:

1.Determine the stirrup diameter: First, the diameter of the stirrups needs to be determined according to the size and force of the beam.

2.Determine the stirrup spacing: The spacing of the stirrup track needs to be determined according to the stirrup diameter and the size of the beam, in general, the stirrup spacing can be controlled between 2 times and 3 times the stirrup diameter.

3.Determine the length of the stirrup infill area: The length of the stirrup infill area needs to be calculated based on the stirrup diameter and stirrup spacing.

The specific calculation formula is: stirrup encryption area length = stirrup diameter 3 + stirrup spacing. For example, if the stirrup diameter on a beam is 10mm and the stirrup spacing is 25mm, the length of the stirrup encryption area of the beam is 10mm 3+25mm=55mm.

It should be noted that different stirrup diameters and spacing will have different effects on the mechanical performance of the beam, so it needs to be calculated and designed according to the actual situation. At the same time, the length of the stirrup infill area also needs to be determined according to the local building design code to ensure compliance with relevant safety standards.

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.

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 frame beam ends, 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.

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 frame beam ends, 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.