Steel structure - new technology for steel structure housing

In the process of the development of the steel structure industry in full swing, the new green and environmentally friendly technology of steel structure housing has gradually appeared. Steel structure housing, short construction period, environmental protection and energy saving, while its main materials can be recycled greatly saving the cost of the owner, so now steel structure housing is gradually rising, coupled with the strong support of relevant national departments, many steel structure enterprises are eager to try, have begun to develop new technologies for steel structure housing. The mainstream of Sichuan's steel structure market is still dominated by large-scale public buildings such as steel structure workshops and steel structure grids, and it is still relatively backward in the research and development and innovation of steel structure housing compared with the central and eastern regions. Today, Xiaobian will take you to see the new technology of steel structure housing that has emerged in China.

Through the development of rectangular steel tube concrete structure, the experimental research on the

seismic performance of steel beam and square steel tube concrete column joints, the research and development of steel truss floor bearing plate, the research and development of prefabricated integral wall panel, the experimental research and study of physical and mechanical properties and construction method of CCA grouting wall building, the research and development of new prefabricated lateral force resistant structure, the overall assessment of the environmental impact and economic efficiency of the whole life cycle of green building and the whole life cycle based on "four sections and one environmental protection", etc. It has formed a complete multi-high-rise steel structure housing system with unique characteristics and industrialization.

Composition and technical characteristics

The new technology system of steel structure housing is positioned in multi-high-rise residential buildings, and adopts steel frame structure, steel frame support structure, steel frame filled steel plate shear wall structure, staggered truss system, steel frame filled prefabricated reinforced concrete shear wall structure, steel frame cast-in-place reinforced concrete shear wall structure and other structural systems. The column adopts cold-formed high-frequency welded square rectangular steel tube concrete composite structure; The beam is mainly made of high-frequency welded H-beam; The beam-column connection nodes mainly adopt the rigid connection of the straight through transverse partition type; The floor slab adopts steel truss floor bearing slab cast-in-place concrete composite floor slab; The interior and exterior walls adopt CCA board grouting wall; The fire treatment of steel structure components adopts thick coated fireproof coating to outsource CCA board.

The column adopts cold-formed high-frequency welded square rectangular steel pipe concrete column, compared with the commonly used box-shaped column welded by four steel plates, cold-formed high-frequency welded square rectangular steel pipe has

only one through-length weld, the welding deformation has a small range of influence, stable welding quality, and the high-frequency welded square rectangular steel pipe concrete column has the advantages of high bearing capacity, material saving, seismic resistance and good fire resistance.

The beam adopts high-frequency welded H-beam steel, its cross-section size is flexible, the flange and web are connected by full penetration weld, automatic production, and stable weld quality. Therefore, high-frequency welded H-beam steel has the comprehensive advantages of large-scale and efficient production of hot-rolled H-beam steel and relatively flexible cross-section of welded H-beam.

Compared with the inner partition connection node, the node

avoids the defect of brittleness caused by welding on both sides of the column wall, and the column wall will not be layered tearing, which improves the seismic performance of the node, solves the production problem of the inner partition connection node when the column wall plate is thin, and is easy to realize mechanized production.

The floor slab

adopts reinforced truss, floor bearing slab, concrete cast-in-place slab. The steel truss floor bearing plate is a cast-in-place concrete, the upper and lower longitudinal steel bars in the floor slab as the upper and lower chords, the bent formed small diameter steel bars as the web rod, weld them into a small truss with a certain rigidity and can withstand the load, and then weld the small truss's bent foot and rib height is only 2mm, and the plate thickness is 0.4~0.6mm profiled steel plate. Steel truss floor bearing plate construction is simple, no need for formwork and scaffolding, simplified steel binding, fast installation, less on-site waste, excellent construction quality, the lower part of the thin steel plate can be easily removed after the concrete reaches strength, directly plastered, no need for suspended ceiling. It is made in the factory using a highly automated production line, with a high degree of mechanization and easy control of product quality.

The interior and exterior walls are made of CCA board grout wall, CCA board integral grout wall is a composite integral solid wall formed by using CCA board as panel, keel as column, and pumping concrete in its cavity.

CCA board grouting wall wall surface is flat, no plastering is required, saving material and labor costs, and the construction speed is fast. In order to ensure the use effect of the grouting wall, Hangxiao Steel Structure Co., Ltd. has carried out a lot of theoretical research on its fireproof, sound insulation, thermal insulation, rainproof, aging resistance, wind pressure resistance and other properties, analyzed various factors affecting the performance of the wall, focused on the material structure of the wall and its construction method, and carried out more than 60 wall materials and performance tests. After testing, the performance not only meets the corresponding standards set by the state, but also is better than the traditional wall, meets the national energy conservation and environmental protection requirements, and also has superior seismic performance.

The steel component fireproof adopts thick coating type fireproof coating to outsource CCA board, which not only protects the fireproof coating but also has a decorative effect, which also improves the fire resistance limit of the steel component and improves the anti-corrosion performance of the steel component.

The new technology system of steel structure housing is based on steel structure as the main load-bearing skeleton, lightweight materials as interior and exterior walls, and concrete floor slabs that do not require steel pipe scaffolding support formwork as floor slabs, which meet the comprehensive requirements of steel structure buildings in terms of applicability, energy conservation and environmental protection, economy, safety, durability and other performance, and can fully reflect the good seismic performance of steel structure buildings, land saving, material saving, energy saving, low environmental impact, material recycling, short construction period, excellent construction quality, It is easy to realize industrialization and has the characteristics of high comprehensive performance and price ratio, and is a green and low-carbon building.

After reading the above steel structure technology introduction, we have a basic understanding of the construction of steel structure housing, and everyone is currently groping, hoping to find a more concise, more material-saving and more reasonable construction method. I believe that there will be more and better new technologies in the future, making our building of houses more convenient, faster and more humane. It is also hoped that the western cities represented by steel structures will also join the ranks of research and development and innovation of new technologies!