Method for evaluating blast vibration damage of building based on 3D laser scanning

Abstract

The invention discloses a method for evaluating blast vibration damage of a building based on 3D laser scanning. The method uses a 3D laser scanning technology to scan the building, obtains comprehensive point cloud data of the building, and performs processing and modeling to obtain distribution patterns, length and width expansions of surface cracks in all load-bearing parts. A new local crack density is defined, and the local load-bearing structural damage of the building is judged by the local crack density. The statistics of each load-bearing structural damage are conducted to obtain theoverall local crack density so as to evaluate the overall damage of the building. The vibration displacement of a geometric centerline of the building can also be obtained at the same time by using the 3D laser line scanning. This method can also measure the continuity of a target object, and can obtain a real-time damage state of the building structure. The method can quickly give structural damage results in the judgment of building damage in the fields of mine, water conservancy and hydropower, transportation and the like, thereby having a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for evaluating building blasting vibration damage based on three-dimensional laser scanning. Background technique [0002] Now buildings are damaged by natural or man-made factors. For example, the load-bearing structure of a high oil tower will be damaged under the loads of blasting, wind, and waves; when the buildings and buildings are affected by nearby blasting disturbances and daily temperature changes, the load-bearing parts such as walls will be deformed and cracks will appear. The structure is damaged; bridges and other buildings are subjected to vehicle loads and temperatures, and cracks will also occur, causing structural damage. Therefore, whether it is a major civil engineering project or a general civil building, as time goes by, the accumulation of structural damage and the attenuation of its resistance will inevitably be caused by natural...

AI Technical Summary

Problems solved by technology

For example, the load-bearing structure of a high oil tower will be damaged under the loads of blasting, wind, and waves; when the buildings and buildings are affected by nearby blasting disturbances and daily temperature changes, the load-bearing parts such as walls will be deformed and cracks will appear. The structure is damaged; bridges and other buildings are subjected to vehicle load and temperature, and cracks will also occur, causing structural damage

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