Influence of space frame fabrication, installation method and span size on space frame structure selection

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The space frame structure is affected by many factors, such as space frame production, installation method, span size, steel index, etc., which all affect the determination of which space frame form to use to a certain extent.

1. For example, the joints are welded, and the space frame composed of plane trusses is more convenient to make than the space frame composed of quadrangular pyramids; the two-way orthogonal space frame is more convenient than the two-way oblique space frame and the three-way space frame. The frame is convenient; the quadrangular pyramid space frame is more convenient than the triangular pyramid space frame.

2. If the installation method does not adopt the overall lifting or hoisting, but adopts the strip or block installation, or adopts the high-altitude sliding method, select the two-way orthogonal positive space frame, the positive square pyramid space frame, and the positive evacuated square pyramid space. The three orthogonal space frames such as the frame are more advantageous than the oblique space frame.

3. Calculations show that the span size has little effect on the selection of the space frame. However, large-span space frames are generally important buildings. Currently, two-way orthogonal space frames, two-way orthogonal oblique space frames, and three-way space frames are commonly used in our country. The composition of the space frame structure. Because these types of large-span space frames have rich experience in design and construction, and are skilled in technology. Three-way space frame, triangular cone space frame, hexagonal cone space frame, the general structure is more complex, the amount of steel used is large, so it should be less used in small and medium spans.

4. The use of steel index is an important indicator to measure the selection of space frame.

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