Detecting method for internal damages of ancient building wood component

Abstract

The invention discloses a detecting method for internal damages of an ancient building wood component. The detecting method screens internal damage information of the ancient building wood component through using a single-path stress wave detector and a micro-drilling resistance meter, and considers the impact from the positions and cross section forms of different components. The detecting methodcomprises the following steps of: 1, carrying out structural information research, namely, providing basic data for internal damage detection of the wood component; 2, performing comprehensive general survey, namely, preliminarily determining components which may have internal damage; 3, determining a key reinspection region, and reducing the field detection workload and the working time; and 4,detecting the internal damage of the wood component, acquiring the internal damage type of the wood component, accurately positioning the damage boundary, and drawing a three-dimensional distributiondiagram of the internal damage. The detecting method is simple and clear in step and easy to operate, the internal damage and the size of the ancient building wood component can be rapidly and effectively screened out, and a theoretical basis and technical support are provided for subsequent safety evaluation, maintenance and repair of the ancient building wood structure.

Description

technical field [0001] The invention belongs to the technical field of nondestructive detection of wooden structures of ancient buildings, and in particular relates to a method for detecting internal damage of wooden components of ancient buildings. Background technique [0002] The ancient buildings in our country are mainly wood structures, and the main load-bearing components such as columns, beams and purlins are all made of wood. Wood is a kind of biological material, which is vulnerable to bacteria, insects, physical and chemical factors, etc. during long-term use, causing damage to wooden components such as cracking, mildew, moth-eaten, and decay. In many cases, wood damage starts from the inside of the wood, but traditional inspection methods such as visual observation and tapping and pressing cannot detect the damage inside the component. This situation may cause the perennial small damage inside the wooden components of ancient buildings to continue to expand, mis...

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

Images