Wind load back analysis method for super high-rise buildings based on discrete Kalman filter

Abstract

The invention discloses a method for back analysis of wind load of super high-rise buildings based on discrete Kalman filter. The method includes the following steps: (1) based on the actual measured first few order mode shapes, the wind-induced response component of the limited test floor of the structure (displacement or velocity) into modal wind-induced response; (2) use discrete Kalman filter to estimate unknown modal wind-induced response components; (3) identify structure’s Modal wind load; (4) Using the generalized inverse of the mode shape matrix to obtain the time history of wind load on any floor of the structure. This method can solve the problem of insufficient wind-induced response measurement points of super high-rise buildings. The wind load inversion results of this method under the influence of structural modal parameter errors, modal truncation errors and measurement noise can still meet the engineering needs. The research technology provides useful tools and basis for the wind resistance design of super high-rise buildings and related research.

Description

technical field [0001] The invention relates to the technical field of wind load identification of building structures, in particular to a method for back analysis of wind load of super high-rise buildings based on discrete Kalman filtering. Background technique [0002] In recent years, a large number of super high-rise buildings with a height of more than 300 meters have been built in the southeastern coastal areas of my country. Due to the low natural vibration frequency and small damping of these structures, they are relatively close to the main frequency range of typhoon dynamic loads. The wind-induced response is relatively large, and the wind load and wind-induced response are the primary control indicators for its safety and applicability design. Generally speaking, it is difficult to measure the wind load of super high-rise buildings on site. Although the wind tunnel test technology can test the structural wind load, it is difficult to accurately evaluate the wind lo...

AI Technical Summary

Problems solved by technology

However, at present, there are few studies on the inverse analysis of wind loads on building structures, and the research on the inverse analysis of wind loads on super high-rise buildings is even more limited. Therefore, the present invention proposes a wind load analysis method based on discrete Kalman filter anti-analysis method

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