In-depth analysis: steel space frame structure

Steel space frame structure is a common roof form for large sports venues, industrial plants, theaters, waiting car halls and other buildings in China. The method of this new style structure is to rely on the force of the steel body itself, and connect the steel columns together with the bolt ball to support each other, and form a variety of different roof spaces. From the conference room of a few meters to the industrial plant of a span of several hundred meters, these are the suitable range of steel space frame structure.

1.The style of steel space frame structure is bold and open. It not only contains the rhythmic beauty of classical architecture, but also has the romantic nature of modern plastic art. Therefore, more and more architects use its robustness and artistry to design and construct large roof skeleton. This novel and beautiful steel space frame structure constructs a new object image for modern architecture.

2.Steel structure space frame is a kind of multiple statically indeterminate space structure. It is precisely because of the characteristics of multiple super stability of the structure and its unique flexibility of modeling compared with other structures. The matrix displacement method is usually used to calculate the internal forces of the structure. The matrix medium depends on the project situation, and the matrix medium of a simple project should reach tens of thousands of times. More complex projects have a matrix of innumerable dimensions. Even if the computer uses Gaussian iteration method, the calculation will take several hours. Because of the large amount of work in the calculation of the internal force of the structure and the high difficulty in the design of the construction drawing, the popularization and use of the steel space frame structure are greatly restricted before the degree of computer-aided design is completed.

Steel space frame structure has been applied in many large venues today. From the perspective of architecture, it is a revolution in building structure and building materials. From the artistic perception of architectural objects, the diversity of steel space frame structure modeling changes. For the people’s production, living space, added a sense of art. Steel space frame structure, as well as construction materials light, convenient installation and other advantages. At the same time, because the building material is a combination of forces, it has a good seismic performance of the specific effect.

Steel space frame structure features:

1.The space frame is a network structure composed of many rod frames. Is a high order statically indeterminate spatial structure. The steel space frame structure can be divided into flat space frame and curved space frame.

2.the flat space frame is used more, its advantages are: space force system, the rod mainly bear axial force, reasonable force, material saving overall performance is good, large stiffness, good seismic performance. There are fewer types of members, which are suitable for industrial production.

3.Flat space frame can be divided into two types: cross truss system and corner cone system. The angular cone system has more reasonable force and greater stiffness.

4.The ratio of the height of the space frame to the short span is generally about 1/15. Steel pipe is generally used in space frame rod parts, and ball nodes are generally used in nodes.

Arch type structure:

(1) Stress characteristics and scope of application of arch:

1.An arch is a thrust structure whose main internal force is axial pressure. The large span arch structure can be constructed by using concrete with good compressive performance.

2.The arch structure is widely used in buildings and Bridges because of its reasonable stress. Suitable for gymnasium, exhibition hall, etc.

(2) Types of arch: arch can be divided into three hinge arch, two hinge arch and no hinge arch, the latter two types of arch are used more.

(2) Suspension cable structure

(1) Suspension cable structure is one of the ideal large-span structural forms, which is widely used in Bridges. The main load-bearing member of the suspension cable structure is the tension cable, which is made of high strength steel strand or wire rope.

(2) The tension of the cable depends on the sag in span, the smaller the sag, the greater the tension. The sag of the cable is generally 1/30 of the span.

(3) Thin-walled space structure

(1) Also known as shell structure. It is a spatial stress structure, mainly bearing axial pressure in the curved surface, and the bending moment is very small.

(2) Thin shells are often used in large-span roof structures, such as exhibition halls, clubs, hangars, etc. The thin shell structure is mostly cast-in-place reinforced concrete, which costs form work and labor hours.