Optimization method for wind-resistant structural system of high-rise buildings based on the principle of modal mutual interference

Abstract

The invention provides a high-rise building wind resistance structure system optimizing method based on the modality mutual interference principle. The method can obviously reduce vibration and wind load of a wind-induced structure under the premise that structural stiffness is not increased. The symmetry axis direction of a structure system is set to be the wind-sensitive direction deviating from the building appearance to enable vibration of a high-rise building to comprise at least two vibration modalities of different frequencies under the across-wind load effect. The high-rise building wind resistance structure system optimizing method based on the modality mutual interference principle is suitable for high-rise building construction design.

Description

Technical field [0001] The invention relates to the structural design of super high-rise buildings. Background technique [0002] In the structural design of high-rise buildings, it is necessary to ensure that the structural system is safe under extreme wind conditions during the design return period, and it is also necessary to verify that the wind-induced structural displacement is within the allowable range and under the conditions of frequent wind (referring to the return period of 1 to 10 years) Wind-induced structural vibration meets the requirements of living comfort. [0003] As far as the frame core tube structure system of high-rise buildings is concerned, the current design method designs the frame core tube structure system into a layout similar to the shape of the building, such as a core tube layout similar to Jiugongge. The core tube of a building resembling a rectangle is also a rectangle. The most important features of this system are: [0004] ·The shape of the b...

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Problems solved by technology

[0017] The present invention aims to solve the most unfavorable across-wind direction aerodynamic force of the above-mentioned high-rise building structural system in the prior art to excite a single vibration mode along the across-wind direction, thereby generating excessive wind-induced structural vibration and the building safety problems caused by wind loads. Provides a wind-resistant optimization method for high-rise building structures based on the principle of modal mutual interference. This method can significantly reduce wind-induced structural vibration and wind loads without increasing or slightly increasing structural stiffness.

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