A method for detecting internal damage of wooden components of ancient buildings

Abstract

The invention discloses a detection method for internal damage of wooden components of ancient buildings. The method screens the internal damage information of wooden components of ancient buildings through a single-path stress wave detector and a micro-drilling resistance meter, and considers different component positions and cross-sectional surfaces. influence of form. The detection method includes the following steps: 1. Structural information survey to provide basic data for internal damage detection of wooden components; 2. Comprehensive survey to initially determine components that may have internal damage; 3. Determine key re-inspection areas to reduce on-site detection workload and working hours; 4. Internal damage detection of wooden components, acquisition of internal damage types of wooden components and precise positioning of damage boundaries, and drawing a three-dimensional distribution map of internal damage. The method of the invention has simple steps and simple operation, can quickly and effectively screen out the internal damage and size of the wooden components of ancient buildings, and provides theoretical basis and technical support for the subsequent safety assessment, maintenance and repair of wooden structures of ancient buildings.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing of wooden structures of ancient buildings, and particularly relates to a method for detecting internal damage of wooden components of ancient buildings. Background technique [0002] Ancient buildings in my country are mainly wooden structures, and the main load-bearing components such as columns, fangs, and purlins are made of wood. Wood is a kind of biological material, which is easily attacked by bacteria, insects and physical and chemical factors in the long-term use process, resulting in cracking, mildew, moth-eaten, decay and other damage to wooden components. In many cases, wood damage starts from the inside of the wood, but traditional detection methods such as visual observation, knocking and pressing cannot detect the internal damage of components. This situation may lead to the continuous expansion of small damages in the wooden components of ancient buildings, missing ...

AI Technical Summary

Problems solved by technology

However, in the on-site inspection of ancient wooden structures, the inspection conditions are often complicated, such as the shape and position of components and other factors. working precision and stability

In addition, the detection information of the single-path stress wave detection technology is relatively simple, and the position of the internal damage can only be estimated through the wave velocity, but the size of the damage cannot be judged; the disadvantage of the micro-drilling resistance meter is that it can only identify a single path, and cannot obtain the overall damage of the cross-section; Non-metallic ultrasonic detectors generally require coupling agents, which are not suitable for the detection of components with rough or large surface curvatures; although multi-path stress wave detectors have the characteristics of visualization and quantification, they are quite different from the real damage and cannot accurately detect Precise positioning of damaged shape, boundary position and other information

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