Wind engineering analysis method for large-span ultra-high space grid structure

Abstract

The invention discloses a wind engineering analysis method for a large-span ultra-high space grid structure, and belongs to the technical field of special engineering design. The analysis method comprises the following implementation steps of firstly, establishing a structure numerical value wind tunnel model of a spatial grid structure; secondly, obtaining a body type coefficient of the space grid structure according to the structure numerical value wind tunnel model, and calculating a wind vibration coefficient of the space grid structure according to theoretical analysis; establishing a wind load calculation working condition analysis model according to the body type coefficient and the wind vibration coefficient; calculating the mechanical properties under the action of wind load according to a working condition analysis model, judging whether the mechanical properties meet design requirements or not, if so, performing the next step, and otherwise, performing structure optimization; and finally, analyzing the whole elastic-plastic process of the structure under the working condition of wind load calculation by adopting the low-order buckling mode of the structure, and calculating the overall stability of the structure under the action of wind load. The method can replace a wind tunnel test to obtain the shape coefficient of any position under any wind direction angle effect, the test period is short, and the cost is low.

Description

technical field [0001] The invention relates to a large-span and ultra-high space structural system, which is used for the construction of special equipment workshops and belongs to the technical field of special engineering design. Background technique [0002] There are many large-span structures at home and abroad, but the space height of large-span structures is generally not high. The net height of the largest A380 main engine library in China is only 30m, that is, there are few single-story space structures with large spans and super high altitudes; The mechanical characteristics of the structure are different from those of general long-span or super-high structures. Not only must it bear large vertical loads, but it must also bear horizontal loads such as earthquakes and winds; It is impossible to use the existing standard technical indicators such as aspect ratio, height-to-width ratio, and displacement angle; there are also many technical difficulties in the constru...

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Problems solved by technology

[0002] There are many large-span structures at home and abroad, but the space height of large-span structures is generally not high. The net height of the largest A380 main engine library in China is only 30m, that is, there are few single-story space structures with large spans and super high altitudes; The mechanical characteristics of the structure are different from those of general long-span or super-high structures. Not only must it bear large vertical loads, but it must also bear horizontal loads such as earthquakes and winds; It is impossible to use the existing standard technical specifications such as aspect ratio, aspect ratio, and displacement angle; there are also many technical difficulties in the construction of this type of large-span super-high hollow structure; the design and construction of this type of structure is extremely difficult

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