Abstract: Based on the working practice, this paper analyzes the main structural detection technologies in civil engineering at present, and emphatically introduces the specific application and development trends of structural detection technologies in civil engineering, such as improving detection accuracy, optimizing sensor arrangement, improving detection reliability and applying nonlinear diagnosis technologies in line with the actual situation. It is hoped that relevant personnel can learn from and think about it, conduct in-depth research on structural detection technology of civil engineering, explore more development schemes, optimize structural detection technology and ensure the quality of the whole civil engineering.
Based on working practice, this paper analyzes the main structural detection technologies in civil engineering at present, and emphatically introduces the development trend of specific applications of detection technology in the development of civil engineering structures, such as improving damage identification index, improving detection accuracy, optimizing sensor layout, improving detection reliability and nonlinear diagnosis technology, and meeting the actual situation. It is hoped that through study and thinking, the structural detection technology of civil engineering will be deeply studied, so as to explore a more optimized development scheme of structural detection technology and ensure the quality of the whole civil engineering.
Keywords: civil engineering; Structural detection technology; development status
Keywords civil engineering, structural testing technology, development
The detection of civil engineering structure has very important economic and social benefits in engineering construction. The application of structural detection technology in civil engineering not only covers engineering geology, structural mechanics, building materials science and other theories, but also has a close relationship with the construction technology, evaluation standards and quality requirements of the project. With the continuous progress of science and technology, the detection technology of civil engineering structures has been gradually modernized and widely used in the detection of concrete structures, masonry structures and steel structures in civil engineering. Next, three kinds of structural detection technologies are mainly analyzed, and the development trend of the whole structural detection technology is briefly discussed:
Main detection technology of civil engineering structure
Detection technology of concrete structure
The detection technology of concrete structure usually adopts core drilling method, ultrasonic method and rebound method. Core-drilling method is reliable and direct, but it does some damage to the whole civil engineering building structure. Under the premise of not being recognized by the owner and easy to have serious consequences, this detection method will not be adopted. Ultrasonic method is an advanced detection technology, which uses the propagation parameters of ultrasonic wave in concrete structure to detect the whole concrete structure. Due to the complex composition of materials in concrete, there are great differences in attenuation and absorption of ultrasonic waves. When the specific parameters of the whole concrete structure change during the whole ultrasonic wave propagation, it can be determined whether there are cracks or cavities in the internal structure according to the specific monitoring data, so as to detect the defect state of the internal structure. Core drilling method is the most commonly used detection method in civil engineering at present, and the strength of the whole concrete is measured by rebound instrument. Generally, a special water-cooled drilling rig is used to sample the whole concrete structure, and then the compressive strength experiment of the concrete structure is started, and then the structural defects in the whole concrete are inferred.
Masonry structure detection
Masonry structure is adopted in many civil projects in China. Because of its heavy weight, low strength and cohesion, it is easy to be damaged when subjected to strong external force. Therefore, the detection of masonry structure is of positive significance to the quality assurance of the whole masonry building. The detection technology of masonry structure is mainly divided into dynamic detection and static detection. At the same time, the different materials also determine the different detection technologies of masonry structures. When the masonry is stone, it is usually detected by core drilling method, and when the masonry is brick, it is usually detected by combining rebound method and rebound core drilling method. Mild weight of mortar is an important parameter for testing the whole masonry structure, and generally cylinder pressing method and pushing method are adopted. The cylinder pressing method is usually to crush and dry the sample mortar, divide it into graded mortar particles, and then put it into the bearing cylinder for cylinder pressing method, and then judge whether the mortar strength meets the quality requirements. The push-out rule is to push the brick on the wall of masonry structure by using the push-out instrument, and then combine the horizontal thrust and the mortar fullness on the west surface of the pushed brick to detect the masonry structure.
nondestructive test
The detection of steel structure usually refers to the detection of the performance and quality of steel members. In addition, the detection of steel structure can be subdivided into deformation damage of components. Dimensional deviation, construction and painting, connection of building materials and performance measurement, etc. In the inspection process, the performance of steel members can be tested by real load and dynamic test when necessary. And concrete structures. Compared with masonry structure, steel structure has the advantages of light weight, high strength, uniform material, good toughness and plasticity, and its application in civil engineering is more advantageous. With the more and more extensive application of steel structure in civil engineering, the detection technology of steel structure is also improving. At present, the main detection technologies of steel structures include ultrasonic detection, X-ray detection, penetrant detection, magnetic particle detection and eddy current detection. Combined with these advanced detection technologies, the defects in the whole steel structure can be detected more accurately. However, the development of steel structure detection technology in China is still in progress, and it does not have mature detection technology, which needs to be further improved and improved in the future.
Development trend of civil engineering structure detection technology
Improve the damage identification index and improve the detection accuracy.
The existing civil engineering structure detection technology has formed a scientific and systematic system in the identification of damage indicators, and has also made great progress in the setting and classification of main detection parameters. However, compared with foreign countries, there are still some problems in domestic civil engineering structure detection technology, and it is necessary to continuously improve the damage identification index to improve the comprehensiveness and accuracy of the whole structure detection. In the selection of feature quantity, it is usually diagnosed by using some changing parameters of the structure in the case of damage. These characteristics can reflect the changes of compressive strength, shear strength and material cohesion in the whole civil engineering structure, and then through the comprehensive analysis of these indicators, whether there are cracks or cavities in the structure can be diagnosed. With the continuous progress of civil engineering construction technology in China, the quality requirements are gradually improved. The whole detection technology should be improved around the quality requirements of engineering construction, and the selection and perfection of damage identification indexes should be continuously improved, so as to finally meet the requirements of the whole civil engineering construction and improve the scientificity and accuracy of detection technology.
Optimize the arrangement of sensors to improve the reliability of detection.
The number, position and type of sensors play a decisive role in the detection technology of the whole civil engineering. With the increasing complexity of civil engineering construction, new requirements are put forward for the optimization of sensors in the process of structural detection and diagnosis. In the future development of civil engineering structure detection technology, the layout of sensors should be optimized effectively, so as to improve the reliability of the whole detection technology. The optimization of sensors should be based on the overall structural analysis model, and the optimal layout of sensors should be determined by generalized genetic algorithm. In addition, we should also scientifically optimize the number of sensors, realize the maximum information collection by using the correct operation of noise signal system, optimize the priority number of sensors and realize the optimal arrangement of sensors. In the future development process of civil engineering structure detection technology, more energy should be put on the optimal arrangement of sensors to realize the excellent application of detection technology.
The application of nonlinear diagnosis technology accords with the actual situation.
The structure of civil engineering is generally nonlinear, so in the application of detection technology, the application of nonlinear diagnosis technology should be combined with the nonlinear characteristics of the whole structure, thus reflecting the scientific nature of the whole structure detection technology. Although there are some difficulties in the application of nonlinear diagnosis technology in civil engineering structure detection technology at present, compared with linear diagnosis, this technology requires more complicated calculation algorithms and technical operations, but nonlinear diagnosis technology is closer to reality. In the future development of structural detection technology, the research and application of nonlinear technology should become a key point. Considering the advantages of genetic algorithm, wavelet analysis and network in nonlinear analysis and data processing, nonlinear structural diagnosis technology has great development space and prospect in structural damage identification. In the development of nonlinear structural detection technology, it is necessary to constantly adjust and optimize the building structure of civil engineering, and improve and perfect the application of overall nonlinear structural diagnosis technology.
label
To sum up, the detection technology of civil engineering structures in China is still in the stage of continuous development, and there is still much room for improvement in the detection technology of concrete structures, masonry structures and steel structures. The research on these structural detection technologies can expand the development space of the whole civil engineering detection technology. The continuous improvement and optimization of civil engineering detection technology can bring great influence to the whole field of civil engineering construction, better ensure the construction quality of the whole project and meet the development requirements of society.
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