Complex building structure natural vibration characteristic measurement method

Abstract

The invention discloses a complex building structure natural vibration characteristic measurement method. According to the method, a complex building structure is simplified through bearing structural members, and the simplified structure is composed of sub-members such as columns, beams, plates and the like. The differences of the sub-members in mass, rigidity and supporting constraint are considered, the positions of the sub-members are selected as local feature points such as local mass change points, rigidity change points and typical supporting constraint points, and the influence degree of the local feature points on the overall natural vibration characteristic is a local feature coefficient. Vibration sensors are arranged at the local feature points, and vibration waveforms are monitored and recorded; the local natural vibration frequency of each feature point of the complex structure is calculated according to the free vibration part of the tail wave band of the vibration waveforms; and weighted average is performed on the local natural vibration frequency and the local feature coefficient to obtain the comprehensive natural vibration frequency of the complex structure. The method can more comprehensively, accurately and reasonably consider the comprehensive natural vibration features of the complex structure in the analysis of the natural vibration features of the complex building structure, and has a wide prospect.

Description

technical field [0001] The invention belongs to the technical field of building safety monitoring, and in particular relates to a method for measuring natural vibration characteristics of complex building structures. Background technique [0002] In the construction of large-scale projects such as mines and hydropower, it is usually faced with the problem of vibration safety control of excavation disturbance. The quality of the control effect directly affects the safety and stability of complex buildings that have been built and the construction efficiency and safety of other structures under construction. At the same time, in the field of traffic safety evaluation, the passage of various dynamic loads (such as trains) will also induce dynamic disturbances in stations and surrounding buildings. To solve such problems, especially for complex and large-scale building structures, the traditional measurement technology mainly uses single-point measurement or numerical simulation...

AI Technical Summary

Problems solved by technology

To solve such problems, especially for complex and large-scale building structures, traditional measurement techniques mainly use single-point measurement or numerical simulation to simplify the natural vibration analysis of the model to obtain the natural vibration characteristics of the complex building structure, which has a large degree of structural simplification. Weak representativeness, only suitable for simple structures and small-scale buildings, unable to accurately and comprehensively make effective judgments on the natural vibration characteristics of complex structures and large-scale buildings

Images