Overlap length of steel bars
Release time:
2024-05-13
The specification requirements for the length of the steel bar binding overlap shall not be less than 300mm. The minimum overlap length shall meet the specification requirements. According to the calculation of the overlap ratio, the vertical steel bar binding overlap position of the shear wall shall be turned up after the floor concrete of this floor is poured. Set steel joints about 1m apart. According to national standards, the overlap length of steel bars should be calculated according to the formula L=1.2d (1+λ)/α, where L is the overlap length, d is the diameter of the steel bar, λ is the length ratio of the stressed members, and α is the steel bar The ratio of tensile strength to the axial compressive strength of concrete.
The overlap length of steel bars refers to the length required for two steel bars to transmit force through the overlap joint. The overlapping methods include overlapping and flat overlapping. The overlapping length of the overlapping method should be greater than 20d, and the overlapping length of the flat overlapping method should be greater than 37d. For non-stressed steel bars, whether stacked or flat, the overlap length should be greater than 20d. In addition, the overlap length of the mesh in different processes is also different. For example, the cold-rolled overlap length should be greater than 20d, and the cold-drawn overlap length should be greater than 25d.
The specification requirements for the length of the steel bar binding overlap shall not be less than 300mm. The minimum overlap length shall meet the specification requirements. According to the calculation of the overlap ratio, the vertical steel bar binding overlap position of the shear wall shall be turned up after the floor concrete of this floor is poured. Set steel joints about 1m apart. According to national standards, the overlap length of steel bars should be calculated according to the formula L=1.2d (1+λ)/α, where L is the overlap length, d is the diameter of the steel bar, λ is the length ratio of the stressed members, and α is the steel bar The ratio of tensile strength to the axial compressive strength of concrete.
For the overlapping length of seismic steel bars, according to the provisions of GB50204-2002, the calculation formula for the overlapping length is lle=1.2×1.15×the minimum overlapping length of longitudinal tension steel bars, where 1.2 is the correction factor for the area percentage of the steel bar lap joint, and 1.15 is the earthquake resistance coefficient. In addition, according to the provisions of 03G101-1, the calculation formula for the overlap length is: lle=1.4×lae, where 1.4 is the correction factor for the area percentage of the longitudinal tension steel overlap joint, and lae is the seismic anchorage length of the longitudinal tension steel bar.
Latest News
Steel pipes can also be divided into seamless steel pipes and welded steel pipes according to the production process. Seamless steel pipes are divided into hot-rolled and cold-rolled (drawn). Welded steel pipes are divided into straight seam welded steel pipes and spiral seam welded steel pipes.
2024-05-13
The size standards of steel rods cover steel rods of different shapes and sizes, including round steel, square steel, flat steel, hexagonal steel, octagonal steel, etc. These standards mainly involve cross-sectional shape, size, weight and allowable deviations, length and allowable deviations, and appearance.
2024-05-13
The difference between steel coils and steel strips
The difference between steel coils and steel strips mainly lies in their size and use. Steel coils usually refer to larger width coils, while steel strips refer to narrower coils and are used in specific processing areas.
2024-05-13
Can steel plates and stainless steel be welded?
Steel plates and stainless steel can be welded. Before welding, it is necessary to use an angular grinding wheel to grind off the galvanized layer at the place to be welded.
2024-05-13
Angle steel is a versatile structural steel that is widely used in various fields.
2024-05-13
The specification requirements for the length of the steel bar binding overlap shall not be less than 300mm. The minimum overlap length shall meet the specification requirements. According to the calculation of the overlap ratio, the vertical steel bar binding overlap position of the shear wall shall be turned up after the floor concrete of this floor is poured. Set steel joints about 1m apart. According to national standards, the overlap length of steel bars should be calculated according to the formula L=1.2d (1+λ)/α, where L is the overlap length, d is the diameter of the steel bar, λ is the length ratio of the stressed members, and α is the steel bar The ratio of tensile strength to the axial compressive strength of concrete.
2024-05-13
CONTACT US
WhatsApp : +8615206544514
Tel : +8615206544514
Email : sales08@hbis-group.com
Add : STEEL FACTORY ROAD, LUBEI DISTRICT, TANGSHAN, HEBEI, PRC
GET A FREE QUOTE
Copyright : Tangshan Iron and Steel Group