Load analysis method and device considering modal coupling effect and storage medium

Abstract

The invention discloses a load analysis method and device considering a modal coupling effect and a storage medium. The method comprises the following steps: 1, preparing raw materials; carrying out adynamometric balance wind tunnel test on the building; acquiring an overturning moment time sequence and a torque time sequence; and establishing an aerodynamic bending moment power spectrum matrix of a building structure base, analyzing to obtain a total bending moment response, a background bending moment response and a resonance bending moment response considering a modal coupling effect through the modal distribution coefficient matrix and the frequency response function matrix which are obtained through calculation, and calculating an equivalent static wind load of the building structure. The device comprises a memory for storing a program and a processor for loading the program to execute the analysis method. The storage medium stores instructions for executing the analysis method by a processor. By using the analysis method provided by the invention, the equivalent static wind load data precision can be higher, and the safety and reliability of a building can be ensured when the method is applied to building structure analysis. The method can be widely applied to the technical field of building analysis.

Description

technical field [0001] The invention relates to the technical field of architectural design, in particular to a load analysis method, device and storage medium that take into account the modal coupling effect. Background technique [0002] With the continuous development of modern economy and science and technology, the number of high-rise buildings in the world is increasing rapidly. Compared with ordinary buildings, high-rise buildings can bring obvious social and economic benefits, but they have many new advantages in design and technology. Issues need to be considered and resolved. In view of the structural characteristics of high-rise buildings such as light weight, high flexibility, small damping and low natural vibration frequency, in the structural design of buildings, with the continuous increase of building height, the weight of wind load gradually exceeds the weight of earthquake load and becomes the most important factor. Pay attention to the load. The research...

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Problems solved by technology

However, in the existing equivalent static wind load analysis methods, the wind vibration effect and wind load caused by the first-order modal vibration in a side swing direction of the building structure are only considered, for example: only the x-direction of the building structure is considered The natural frequency, damping ratio and other dynamic characteristics are used to calculate and analyze the wind load, and the relevant parameters in the y direction are not considered at all. In fact, the modal principal axis and the geometric principal axis of the building structure do not necessarily coincide completely.

This analysis method does not take into account the effect caused by the modal coupling effect, and the analysis results are obviously not accurate enough. The structural design of the high-rise building itself requires extremely high rigor and accuracy. Once a large error occurs in a certain link, it will Therefore, the above-mentioned existing equivalent static wind load analysis methods urgently need to be further improved and supplemented

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