Research on the application of new thin-wall H-shaped steel and wall materials in steel structure buildings

In order to meet the requirements of the environment and other aspects, and to approach the overall technical level of the construction industry in developed countries in the world, the country has vigorously applied and promoted steel structure construction in the past few years, driving the development of new materials and construction technologies for the entire construction market. Compared with the traditional structural system, the steel structure building has obvious advantages: 1. Less environmental damage and pollution, easy reconstruction and demolition, and high material recovery and regeneration utilization rate.

2. The appearance of the building is beautiful, and the internal use area is increased. Due to the high strength of the steel and light weight of the house, when the steel frame is used as the support structure, it is possible to build a room with a large depth and the required cross-section of the component is small, and the construction space utilization rate under the same building area increases 3. The cycle is shortened. Steel structural members are generally prefabricated by professional manufacturers. In addition to easy construction quality assurance, the degree of industrialization is high and the construction speed is accelerated, because the parts need to be delivered to the site for assembly, so the construction site is civilized, the site wet work is less, noise dust and construction waste Also less. Construction operations are less affected by weather and seasons. Some standardized housing systems can be ordered at any time and built at any time, which greatly shortens the construction cycle and time for capital occupation.

4. Due to the use of light roof and wall structure, the material strength of the supporting steel structure is high, the material is saved, the size is small, and the weight is light. This greatly saves and reduces transportation and hoisting costs, and the base load is correspondingly reduced, thereby reducing the cost of base sleeves.

5. The steel structure has good ductility and good seismic performance, and because the steel is easy to process, it is easy to repair after the disaster.

The existence of these advantages provides good conditions for the development of steel structures. During the growth period of the construction industry of industrialized countries, the amount of basic construction steel generally accounts for more than 30% of the total steel production. China's current total construction steel, including construction machinery, doors, windows and reinforced concrete structural steel, only accounts for 22 % ~ 26%, this is mainly because the direct use of steel in China's house structure is still relatively small. Therefore, the development of steel structure building in building Jk has great potential.

In the steel structure, the light steel residential building compared with the civil residential building and reinforced concrete building requires the weather resistance and fire resistance of the steel in addition to the above advantages. The new high-frequency welded thin-walled H-shaped steel just happens to give full play to the advantages of the steel structure system. Its light weight, good cross-sectional performance, many product specifications, high dimensional accuracy and convenient production of special-shaped H-shaped steel have been increasingly affected. The more developers and contractors are favored. Japan ’s annual steel structure housing uses about 8 million tons of steel, of which high-frequency welded H-shaped steel is 200,000 tons, accounting for about 2.5%. At present, China ’s steel structure housing is still in its infancy, and the amount of steel structure is still relatively small. It can be said that the development of steel structure housing is an opportunity to promote the overall development of the entire steel structure industry.

2. Introduction to Light Steel Building I Cheng Shanghai Baosteel Construction Co., Ltd. has undertaken many steel structure buildings. As shown in the Shanghai Pudong International Airport terminal building project, its roof purlin system uses Datong's high-frequency welding thin technique as an arched roof.

The thin-walled H Shanghai Pudong International Airport terminal section steel has excellent cross-sectional properties, and its section torque, section coefficient, pressure resistance and load carrying capacity are much higher than those of hot-rolled H-section steel. 3 Thin-wall H-section steel is light in weight. Generally speaking, only hot The weight of rolled H-shaped steel is 82%. There are many specifications of high-frequency welded H-shaped products. It is convenient to produce special-shaped H-shaped steel with unequal width of upper and lower flanges and unequal thickness of upper and lower flanges, which is convenient for design and selection to reduce raw material waste. At the same time, the thin-walled H-shaped steel has high dimensional accuracy, smooth and beautiful surface, and there is no uneven thickness of the wings and webs.

Guangdong Dongguan Light Steel Villa constructed for Baosteel Construction Shanghai Datong Steel Structure Co., Ltd. The main structure of the project is all high-frequency welded thin-walled H-shaped steel. Its shape is variable and beautiful. The entire structural system is light and the overall strength performance is improved. Compared with other steel structures, the construction cost is relatively lower, and the construction period is shortened.

High-frequency welding thin-wall H-shaped steel has its unique advantages in construction, such as: easy to cut and weld, can be processed, designed and combined at will; its length can be customized, reducing the waste in the use of fixed-length products; Because prefabricated products are assembled on site, construction time is shortened and construction costs are reduced.

For Shanghai Zhongfucheng steel structure residence, the main structural frame adopts high-frequency welded thin-wall H-shaped steel. Its technical feature is that the width of the flange can be any coup according to the design, the moment of inertia of the steel structure is superior, and the steel consumption is saved. This project is a key promotion project of the Ministry of Construction and Shanghai.

In the above steel structure buildings, no uniform wall building materials have been used, so that the overall advantages of steel structure buildings have not been brought into play, and the use of more advanced new building materials for internal and external walls has significantly improved steel structure buildings. Overall superior characteristics. In the past, the actual organization and construction of steel structure buildings revealed some technical problems that need to be solved. For example, for different types of structural design codes and construction technical standards, the development of new types of lightweight thermal insulation wall materials and supporting issues need to be further improved. Among them, new wall materials for fire protection, heat insulation, waterproofing, and sound insulation require further work. In the actual project, we found that the new wall materials have very good advantages, such as: good energy effect and good thermal insulation performance; there is a reasonably large area for use; the total weight is light and the basic treatment cost is reduced; 4. Construction The speed is fast, so it can reduce the overall cost, speed up the capital turnover, and increase the capital income; 5. The environmental protection effect is good, the amount of sand, stone, and ash is greatly reduced during construction, the damage to non-renewable resources is reduced, and the wet method on site is also made The amount of construction is greatly reduced, greatly reducing gray construction waste.

New wall materials need to be promoted, which will provide favorable conditions for saving energy, protecting the environment, and improving building functions and quality. To this end, while promoting and applying high-frequency welded thin-wall H-shaped steel as the main frame of the building, we have also done a lot of work and discussion on various new wall materials.

3. The development status of wall 1 materials The focus of the recent industrialization of new wall materials is: non-clay type transfer, butterfly blocks and plates, various cement-based lightweight boards, paper-faced gypsum boards, colored steel sandwich and other plates and light Lightweight skeleton materials such as steel keels, multifunctional (lightweight, high-strength, thermal insulation, heat insulation, fire prevention and non-toxic) composite wall materials and products.

There are many new building wall materials that have been applied in the market, for example: 1. Aerated concrete is composed of siliceous materials (fly ash, sand) and calcareous materials (quick lime, cement), using aluminum powder as the The gas-generating agent, light-weight porous concrete synthesized by autoclaved hydrothermal, is a new type of lightweight building material that is being vigorously developed in China.

China Construction Metal Structure Shanghai Zhongfucheng Steel Structure Engineering Special Discussion Board (GRC Wall Panel for short) is another new type of lightweight wall material, with excellent properties such as light weight, thin plate, moisture proof, non-combustible, sound insulation and heat insulation, and Has good bending and impact resistance and good workability (can be processed by sawing and nailing), suitable for internal and external partition walls of frame buildings, non-load-bearing walls of various buildings, partition walls such as toilets and kitchens, and suitable for Any partition wall and old house renovation in the large room.

3. The steel wire mesh sandwich panel is composed of a welded steel wire mesh on both sides and a W-shaped steel wire welded into a space steel wire mesh skeleton, filled with a flame retardant polystyrene foam core material. The product has light weight, no cracking, and is easy to waterproof, fireproof, cut and assembled, and is easy to transport and assemble into a wall. The product has convenient construction and good effect, and can reduce a lot of construction waste. The utility model can be widely applied to the surrounding walls, internal partition walls, partition walls and floor and floor panels of various buildings, and is particularly suitable for use in the addition of high-rise buildings and buildings, and can be used for various wall decoration on the outer surface according to design requirements.

4. Fly ash small hollow bricks make full use of coal slag and fly ash discharged from power plants to make small aggregate small hollow bricks. The product has the characteristics of light bulk density, good thermal insulation performance, reliable strength and durability. It can be widely used in frame structure filling wall and other non-bearing walls.

High strength, light weight, fire prevention, waterproof, heat insulation, sound insulation, corrosion resistance, freeze resistance and rapid and convenient construction. The material can be silver, planable, or perforated, easy to transport and easy to use. It can be used in many aspects such as partition walls, retaining walls, ceilings, veneers and decorations.

6. Color steel composite sandwich panel and profiled panel, light-weight steel structure building is a new type of building that has been widely used abroad in the 1980s. Because of its easy assembly, short construction period, beautiful color and shape, low cost, and very high development fast.

The new wall material with the concept of energy, environmental protection and health has the characteristics of waterproof, heat insulation and fire protection, and has good strength, impact resistance, light weight, weather resistance, water tightness, air tightness, and electrical insulation. Sex and corrosion resistance. Moreover, it has good cutting performance, and can be easily cut using general woodworking tools without special technology, and the cutting surface is smooth.

Due to its various good performances and unique structural design, it has now applied for a new type of patent. The biggest advantage of the TCK fast-standing wall compared with the above-mentioned wall materials lies in the development of its complete set of technical structural parts, rather than focusing only on whether the performance of the material itself meets the requirements of a certain national standard. Make the product have multiple functions, so-called "three in one". Therefore, TCK wall is one of the new wall materials worth promoting.

It is a schematic diagram showing that the structural parts and wall materials of TCK fast-standing walls are applied in different positions.

4. Technical Features and Application of TCK Quick Standing Wall As a new type of patented product, TCK Quick Standing Wall is shown in the structural form.

1. Applicability: TCK fast-standing wall can also be used as an outer wall or an inner wall. At the same time, different wall structure forms can be adopted for different climatic characteristics. In the table, the different functions of different types of wall materials are described in detail. For example, TK-A01 type external wall can be applied to the application problems of different types of TCK wall materials. Fire prevention, Ji ff, suspicion of waterproofing and protection of coffee * 獬 M * Rnywr, fire protection conformity 77C-> l (Mf general cold and hot plaque J TCK fast wall structure diagram igniting thickness comparison and very hot climate zone .

2. Fireproof and flame resistance: The main fireproof layer of TCK fast wall is composed of inorganic materials. It adopts a unique manufacturing process and has considerable fireproof and heat resistance performance. It is tested by 1-4 hours of system fire aging. Demonstrated the advantages of its fire resistance.

3. Heat insulation and energy saving: the surface fireproof layer has low thermal conductivity, good heat insulation, and inherent heat insulation effect. The low thermal coefficient plastic steel is used as the middle layer material and is designed with a hollow inner membrane. The interior is divided into several small spaces filled with air, which reduces the thermal conductivity relatively, and has an excellent thermal insulation effect.

4. Sound insulation: with excellent sound insulation effect, it can easily block noise above 50DB value. Give users a quiet and relatively private space.

5. Waterproof and anti-manipulation: This wallboard has a double-layer medium hole inner mold structure impermeable layer. Through careful structural design, the seam concave and convex grooves are closely connected, and the water resistance is good. At the same time, long-term dampness will not change its quality and shape.

6. Environmental protection: 100% without asbestos fiber, no harmful radiation damage. The product has convenient construction and good effect, can reduce a lot of construction waste, and has little impact on the environment.

Initial, high bending resistance, bending resistance and impact resistance. Because the concave and convex grooves are tightly connected, the structure integrity is good.

Strong sex, long life, never deteriorate. It has good machinability and can be easily handled using common woodworking tools without special techniques.

Various indicators are required, so when this wall material is used in combination with a steel structure, the effect is better and the advantages are more obvious. TCK wall panel is a new wall material worth promoting, it can further improve the overall advantages of steel structure buildings.

With the improvement of processing technology, improvement of technology and practical application promotion, its cost is expected to be greatly reduced, thereby avoiding the shortcomings in advantages, and providing advantages for its wider use in steel structures and frame structures. conditions of.

The appearance of the villa and the rapid construction of the built villa house have played their own unique advantages.

Light steel building villas with TCK wall materials. Chinese building metal structure name number C is suitable for severe cold and hot climate areas. Floor, value-added interior decoration roof waterproof and thermal insulation special topic five. Summarize the development of steel structure construction, which brings convenience to the high requirements of various factors such as environment, architectural modeling, convenient construction and increasing indoor use area. The implementation of advanced internal and external wall materials in the main steel structure building is the key condition to meet the above requirements. The high-frequency welded light H-shaped steel has the advantages of thin web, easy to expand, good bending stiffness, close inertia moment in the two main axes, and straight and easy connection of the flange plate. The cost is greatly reduced.

Through the introduction of new wall materials and the application of high-frequency welding thin-wall H-shaped steel structures, and the analysis of its technical characteristics and material superiority, the application and promotion of new wall materials is imperative. This not only contributes to the benign development of structural construction, but also to the benign development of steel structure-related industries, to meet the high requirements of environmental protection, modeling, construction period, overall performance, etc., and provide consumers with a high-quality living or office environment creating condition.