Building blasting vibration damage evaluation method based on high-speed photogrammetry

Abstract

The invention provides a building blasting vibration damage evaluation method based on high-speed photogrammetry. The method comprises the following steps that S1, a high-speed photography instrumentis arranged to shoot each part of a building, vibration sensors are arranged in the positions which cannot be shot, and meanwhile vibration data acquisition is carried out; S2, fragile or defective parts of the building structure are determined based on the vibration data, a mark point is selected at each of the fragile or defective parts, moreover, a plurality of mark points are correspondingly selected at all integral structure parts of the building, and then key tracking and shooting are carried out on all the mark points; S3, the vibration frequency of each vibration sensor arrangement position and the vibration frequency of each mark point in the building are obtained through calculation; S4, characteristic values of all the integral structure parts as the characteristic vibration frequencies of the structure; S5, each characteristic vibration frequency and the vibration frequency of each fragile or defective part are correspondingly multiplied by the corresponding proportion coefficients, and then summing is carried out to obtain the effective vibration frequency; and S6, vibration damage evaluation is carried out by utilizing the effective vibration frequency.

Description

technical field [0001] The invention belongs to the technical field of structural service state and damage non-destructive detection, and in particular relates to a method for evaluating building blasting vibration damage based on high-speed photogrammetry. Background technique [0002] Blasting construction is a common construction method, which has the advantages of practicality, high efficiency, simple operation, and economic benefits. In the process of rock blasting, in addition to breaking and throwing the rocks adjacent to the blast hole, a large part of the energy of the explosion will be transmitted to the surroundings in the form of seismic waves, which will cause the vibration of the buildings in the vicinity of the blasting, and the long-term vibration will cause structural damage to the buildings. The accumulation of long-term structural damage can cause catastrophic structural failure or make it lose its function. [0003] In order to prolong the service life o...

AI Technical Summary

Problems solved by technology

However, this damage evaluation method does not take into account the vibration characteristics of special local parts such as beams, slabs, columns, doors, windows, and wall corners. Cracks will appear first, obviously the traditional method cannot respond to the damage in time

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