What are the types of box girder reinforcement? What are the types of beam reinforcement

Nanjing Mancartel has developed a 50-year underwater non-aging planting glue, which has passed non-toxic testing and has been widely used in projects including Zhejiang Zhoushan Wharf, with free technical support nationwide and same-day delivery. There are 8 offices in China, and the after-sales service is guaranteed. Passed ISO quality system certification, or China famous product products, underwritten by insurance companies, contact Mancartel 4-0-0-8-9-4-5-1-1-8

1. Longitudinal stressed steel bar.

The main function of the longitudinal stressed steel bar is to bear the tensile force generated in the beam under the action of external force. Therefore, the longitudinally stressed reinforcement should be arranged in the tension zone of the beam.

2. Bend the steel bar.

Bending rebar is usually formed by bending longitudinal rebar. Its main function is to bear the tensile stress caused by the bending moment and shear force in the bending section of the beam close to the support in addition to bearing the tensile force generated by the positive bending moment.

3. Erecting steel bars.

The main function of erecting reinforcement is to fix the stirrups to ensure their correct position and form a reinforcement skeleton with a certain stiffness. At the same time, the erection reinforcement can withstand the stresses caused by temperature changes and concrete shrinkage, preventing cracks. The erection reinforcement is generally parallel to the longitudinal stress reinforcement and is placed on both sides of the stirrups in the compression zone of the beam.

4. Stirrups The main function of stirrups is to bear shear force. In addition, stirrups are tied or welded with other reinforcements to form a well-integrated spatial skeleton. Stirrups are generally perpendicular to longitudinally stressed reinforcement.

5. Structural reinforcement on the side of the beam.

The longitudinal structural reinforcement on the beam side, also known as the waist bar, is arranged on two sides of the beam, and its function is to bear the stress caused by the temperature change on the side of the beam and the shrinkage of the concrete, and to inhibit the development of concrete cracks.

Structural reinforcement is the reinforcement that is set up in the reinforced concrete component considering various factors that are difficult to measure. It is the reinforcement that is laid out according to the mandatory requirements of the national building structure design code and does not need to be recalculated by the designer, which is the structural reinforcement, such as the medium and long reinforcement of the unidirectional stress plate and the encryption of the core area of the column.

Generally speaking, the erection bar is used to erect stirrups in the beam, generally appears in the beam above the three limb hoops, the ribs on both sides are long, and the middle ribs only have additional ribs (that is, we say pick ribs), if there is no erection bar, the limb stirrups in the middle can not be tied, so there is a erection bar.

Classification of construction reinforcement.

1. distributing steel bars;

2. an additional steel bar embedded in the inner plate of the wall;

3. The perimeter is supported on the reinforced concrete beam, the wall, and the structural steel bar on the edge of the plate;

4. Structural reinforcement perpendicular to the beam.

The structure of the beam refers to the reinforced concrete beam structure, according to the structural needs of the reinforcement bar, the structural steel bar does not bear the main force, only plays the role of maintenance, tie knot, distribution.

In the process of structural design, the structural reinforcement is generally used in accordance with the provisions of the code, rather than through mechanical calculations.

The structural reinforcement of the beam includes: structural waist reinforcement, erection reinforcement, structural stirrups, etc.

The structural reinforcement of the beam refers to the reinforcement parallel to the longitudinal reinforcement of the beam on both sides of the web when the net height of the beam web is greater than 450mm (the beam height minus the plate thickness), and the structural reinforcement does not bear the main force and plays a structural role, such as fixing stirrups and tie ribs.

There are several types of reinforcement within a beam:

1. Longitudinal stressed steel bar: when it is a simply supported beam, the longitudinal stressed steel bar is in the lower part of the beam, and the effect is to bear the tension of the lower part of the beam caused by the positive bending moment of the beam. Cantilever beams, the reinforcement should be arranged on the upper part of the beam.

2. Longitudinal erection of steel bars: The shape of the beam is generally rectangular, of course, there are many other special-shaped beams. However, no matter what kind of cross-section geometry, it is always necessary to control the cross-section shape with a reinforcement skeleton, so the function of erecting steel reinforcement is: to form the geometry of the beam cross-section.

3. Longitudinal bending steel bar: There are often bent steel bars in the longitudinal steel bars, but not all beams have them, and only when the shear force in the beam is large, it is necessary to configure the bent steel bars. The bent reinforcement in the beam is also known as the ventral reinforcement, and its role is to withstand and resist the shear stress within the beam.

4. Stirrups: In addition to the longitudinal reinforcement, the reinforcement in the beam also needs stirrups. There are two kinds of stirrups: open stirrups and closed stirrups, mainly closed stirrups, especially if there are certain seismic requirements, open stirrups are forbidden to use.

The function of stirrups is: 1. erect longitudinal reinforcement, so that the longitudinal reinforcement forms a reinforcement skeleton under the erection of stirrups; 2. The stirrups are also abdominal bars to withstand the internal shear stress of the beam.

Of course, some beams with large geometric dimensions will also be equipped with a certain number of waist reinforcements, tension ribs, etc., which are all structural reinforcements in the beam.

Specifically, you should have more contact with the project, and you will be able to figure it out quickly. Just because I made it for you on the Internet, I can't figure it out or I can't figure it out in the clouds.

Steel box girder. It is also called steel plate box girder, which is a commonly used structural form for large-span bridges. It is generally used on bridges with large spans, and is called steel box girder because it looks like a box.

The steel box girder is generally composed of a top plate, a bottom plate, a web, a diaphragm, a mediastinum and stiffeners.

and so on through the all-welded way of socks to form a letter socks. The roof is an orthotropic bridge deck composed of a cover plate and a longitudinal stiffener.

There are bottom reinforcement, gluten (support reinforcement), stirrup and waist reinforcement in reinforced concrete beams.

1. The bottom reinforcement is used to bear the positive bending moment of the beam, also called the main reinforcement, in the concrete structure, the basic components such as bending, compression, and tension are mainly used to bear the tensile stress or compressive stress caused by the load. Those that bear tensile stress are usually called longitudinal tensile steel bars and tensile steel bars, and those that bear the stress of pressing silver branches are usually called longitudinal compression steel bars and compression bars, collectively referred to as stressed tendons.

2. Gluten (support bar) is used to bear the negative bending moment of the beam and the erection effect.

3. Stirrups are used to connect the stressed main reinforcement and the frame reinforcement to form a reinforcement skeleton, which mainly bears the shear force and torque. The beam will be subjected to the joint action of shear force and bending moment in the bending and shear area, and the main tensile stress trace in this section is oblique, which will produce oblique cracks, because the stirrups are vertical and intersect with oblique cracks, so they can prevent or limit the generation and development of oblique cracks! Torque works on a similar principle.

4. The effect of the waist tendon is the torsion resistance of the beam It belongs to the structural reinforcement in the design, that is, the mechanics do not need to design to calculate the size of the specific force, and this data can be found according to the structural requirements of the national design code. When the beam is high to a certain requirement, it is necessary to add waist reinforcement, according to how much, how much to add specifications according to the structural requirements and specifications.

5. The hanging bar is a kind of steel bar that transmits the concentrated force acting on the bottom of the concrete beam component to the top, and is a kind of steel bar that improves the shear resistance of the beam to bear the concentrated load, and the shape is like ingots, also known as ingots.

The main effect is: because a certain part of the beam is subjected to a large concentrated load, it may cause oblique cracks on the beam, especially the force acts in the tension zone, in order to make the beam body not produce local serious damage, and at the same time make the material of the beam body play its respective role and set up, mainly arranged in the shear force has a large abrupt change in the part, to prevent the part from producing excessive cracks, causing the destruction of the structure, it is necessary to be equipped with suspension bars, but also with additional stirrups.