It is often asked that the shape of the I-beam is similar to that of the H-beam. How do you choose it in practical use? Many people engaged in the construction industry for many years cannot explain it in detail. aluminum pipe
Here is a detailed answer for everyone: Many people believe that I-beam is a domestic name, and H-beam is a foreign name. In fact, this perception is wrong. H-shaped steel and I-beam are different in shape, see the following figure:
I-beam, as its name suggests, is a “work”-shaped section steel with an inclination on the inner surface of the upper and lower flanges, generally 1:6, making the flanges thin outside and thick inside, resulting in I-beams in two The cross-sectional characteristics of the main plane are very different, and it is difficult to exert the strength characteristics just in the application. Although the I-beam steel market also appeared thickened I-beam, but the structure of the I-beam has determined its short-term torsional performance. aluminum pipe
H-section steel is a widely used profile in today’s steel structure construction. It has many differences compared to I-beams. The first is the flange, and the inner surface of the flange has no inclination. The upper and lower surfaces are parallel. The section characteristics of H-shaped steel are obviously better than those of conventional I-beam, channel steel and angle steel. Metal processing WeChat, content is good, worthy of attention. H-section steel is an economic section efficient section with a more optimized cross-sectional area distribution and a more reasonable weight-to-weight ratio. Its section is named after the English letter “H”. The outer sides of the two outer edges of the H-section steel are straight and flat. This makes the H-beam welding splicing easier than the H-beam, the mechanical properties per unit weight better, can save a lot of material and construction time.
The section of the I-beam is subjected to a straight pressure and is resistant to pull, but the section size is too narrow due to the wing plate and cannot be torsionally resisted. Steel H, on the other hand, has its advantages and disadvantages. aluminum pipe
The difference between H-shaped steel and I-beam and its use description
1. For I-beams, whether they are common or lightweight, because the cross-sectional dimensions are relatively high and narrow, the moments of inertia of the two main sleeves in the cross section are quite different. Therefore, they can only be used directly on their webs. The in-plane bent member or the lattice-formed force member. It is not suitable to use axially compressed components or members that are bent perpendicular to the plane of the web, which limits its application. The
2. H-section steels are highly efficient and economical profiles (others include cold-formed thin-walled steels, profiled steel plates, etc.). Due to their reasonable cross-sectional shape, they can enable steels to perform more efficiently and improve their cutting capabilities. Unlike the general I shape, the flanges of the H-beam are widened and the inner and outer surfaces are generally parallel, which facilitates the connection of high-strength bolts and other components. Its size constitutes a reasonable series, complete model, easy to design and use. (In addition to I-beams for crane beams) aluminum pipe
3. The flanges of H-beams are all of equal thickness, have a rolled cross section, and have a composite cross section composed of 3 plates welded together. I-beams are rolled sections, due to poor production processes, the edge of the flange has a 1:10 slope. The rolling of H-shaped steel is different from ordinary I-beam using only a set of horizontal rollers. Because its flange is wide and has no inclination (or a small gradient), a set of vertical rollers must be added and rolled at the same time. The rolling process and equipment are more complex than ordinary rolling mills. The maximum height of rolled steel h-shaped steel that can be produced in China is 800mm, which can only exceed the welding combination section.
China’s hot-rolled H-beam GB (GB/T11263-1998) divides the H-beam into three categories: narrow flange, wide flange and steel pile. The codes are hz, hk and hu. Narrow flange H-beams are suitable for beam or compression-bending members, while wide-flange H-beams and H-beams are suitable for axial compression members or compression-bending members. Compared with H-section steels, I-beams are inferior to H-beams in terms of weight, such as w, ix, and iy.
4. The side length of I-beam is small and high, and it can only withstand the force in one direction.
5. The H-shaped steel groove is deep and thick, and can withstand forces in both directions. aluminum pipe
6. With the development needs of steel structures, only I-beams are not acceptable. They are thickened I-beams and are used to easily destabilize load-bearing columns.
7. I-beams can only be used for beams and H-beams can be used for structural load-bearing columns.
8. H-section steel is an economical section steel with excellent section mechanical properties compared to I-beam. It is named because its section has the same shape as the English letter “H”. The flanges of hot-rolled H-beam are wider than I-beams, large in lateral stiffness, and strong in bending resistance. H-type steel under the same specifications is lighter than I-beam. Manufacturing principle WeChat, content is good, worthy of attention.
9. The flange of the I-beam is made of a thick part of the web and thin outside; the flange of the H-beam is worn.
10. HW HM HN H is the general name for H-beams, H-beams are welded and HW HM HN is hot-rolled. aluminum pipe
11. HW is H-beam height and flange width is basically the same; mainly used for reinforced concrete frame column in the steel core column, also known as the steel column; in the steel structure is mainly used for the column.
12. HM is the H-beam height and flange width ratio of 1.33 ~ ~ 1.75; mainly in the steel structure: used as a steel frame column, in the frame structure to withstand the dynamic load used as a frame beam; for example: equipment platform.
13. HN is the ratio of H-beam height and flange width greater than or equal to 2; it is mainly used for beams; the use of I-beam is equivalent to HN-type steel. aluminum pipe