Method and device for measuring swing amplitude of high-rise building

Abstract

The embodiment of the invention provides a method and a device for measuring the swing amplitude of a high-rise building. The method comprises the following steps of collecting a displacement signal x(t) of a swing amplitude monitoring source; subjecting the displacement signal x(t) to primary filtering to obtain a filtered displacement signal y(t); subjecting the displacement signal y(t) to modal decomposition to obtain an intrinsic mode function (IMF) component Im(t), wherein m=1, 2,..,M, wherein M is the total number of IMF components Im(t); calculating a correlation coefficient between the IMF component Im(t) and the displacement signal y(t) by adopting a preset method so as to obtain a correlation coefficient sequence; according to the correlation coefficient sequence, performing the signal reconstruction to obtain the swing amplitude information of a building. According to the method and the device provided by the invention, the primary filtering is carried out, and then the filtered signal is subjected to modal decomposition. After that, based on the correlation coefficient between the IMF component and the filtered displacement signal after the modal decomposition step, the signal reconstruction is conducted to obtain the more accurate swing information of the building. Therefore, the measurement accuracy of the swing amplitude of the high-rise building is improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of structural detection, and in particular to a method and device for measuring the swing of a high-rise building. Background technique [0002] With the rapid development of my country's economy, high-rise buildings have sprung up in large and medium-sized cities in China, especially in megacities such as Beijing, Shanghai, Guangzhou, and Shenzhen. High-rise buildings will be deformed by various irresistible factors during the construction period. In addition to the aging of building materials caused by years of use after construction, the deformation of high-rise buildings is also inevitable. High-rise buildings will sway along the wind and across the wind under severe weather such as strong winds and typhoons. For example, the high-rise building in Guangzhou-Guangzhou International Finance Center is 432 meters high, and the maximum swing will reach 60 centimeters in strong winds....

AI Technical Summary

Problems solved by technology

However, due to the limitation of image sensor resolution and frame rate, it is difficult to monitor the swing of high-rise buildings with high precision.

Ground-based microwave interferometry has the advantages of long-distance telemetry and high precision, and can be used for high-rise monitoring swing monitoring. However, due to the influence of building factors, environmental factors and equipment factors, there is inevitably noise impact, which reduces the swing rate of high-rise buildings. Monitoring accuracy

At present, there is no method that can effectively improve the accuracy of high-rise building swing measurement

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