Experimental Study on Heat Transfer Characteristics of Hollowing Defect Areas on Building Facade-Reference-Cited by-同舟云学术

Experimental Study on Heat Transfer Characteristics of Hollowing Defect Areas on Building Facade

Published:2024-07-23 Issue:8 Volume:14 Page:2262
ISSN:2075-5309
Container-title:Buildings
language:en
Short-container-title:Buildings

Author:

Gong Xue¹²,Zhu Darong¹²,Li Jianguo¹,Liu Yanli¹,Wang Ping¹

Affiliation:

1. School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China

2. Key Laboratory of Construction Machinery Fault Diagnosis and Early Warning Technology, Anhui Jianzhu University, Hefei 230601, China

Abstract

Infrared detection is more and more widely used in the field of non-destructive testing of buildings to detect whether there is a defect on the surface of the building facade. In many cases, it is necessary to obtain more information about the defect, such as the depth of the defect, so as to evaluate the severity of the defect and repair. The theoretical formula of hollowing defect depths was derived in this paper based on the heat transfer characteristics of the intact and defective areas on the building facade, and the influence of defects with different shapes, sizes and cavity thicknesses on the temperature distribution of the building facade was summarized quantitatively. Firstly, the theoretical formula of the hollowing defect depth and the factors affecting the distribution of the temperature gradient on the building facade excited by external thermal source was derived and restricted by the boundary condition. Secondly, three sets of physical building facade models that contained hollowing defects with different shapes, sizes and cavity thicknesses were fabricated and designed, and the experimental platform was built. The infrared thermograms and the temperature characteristic curves of the hollowing defect in a natural light environment were obtained and fitted according to the temperature differences of the defective area, while analyzing the influence of the size, shape and cavity thicknesses on surface temperature distribution. Finally, the theoretical formula of the defect depth that is applicable to the building façade was validated through the experimental simulation of 14 forms of hollowing. The experimental results demonstrated that the revised formula of defect depth is consistent with the actual defect depth, and the three-dimensional positioning of the hollowing defect of the building facade can be effectively carried out and combined with the defect size taken from the obtained infrared thermal image.

Funder

Anhui Natural Science Foundation

Anhui University Collaborative Innovation Project

Anhui Construction Plan Project

Anhui Province Higher Education Science Research Project

Anhui Province University Outstanding Youth Research Project

Anhui Province University Outstanding Young Talents Support Program

Publisher

MDPI AG

Link

https://www.mdpi.com/2075-5309/14/8/2262/pdf

Reference36 articles.

1. Sai, C.H. (2006). A Study of Exterior Wall Materials Building for Maintenance Management and Inspection Methods—A Case Study of Stone Cladding, China University of Technology Architecture.

2. Tso, S.K., Fan, K.L., Fung, Y.H., and Han, L. (2003, January 20–24). Inspection of large tile walls for high-rise buildings based on a mechatronic mobile system. Proceedings of the 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, Kobe, Japan.

3. Experimental study on wind load on top retaining structures of high-rise buildings;Ma;Vib. Test. Diagn.,2022

4. China Building Energy Efficiency Association, Chongqing University Urban and Rural Construction and Development Research Institute (2024). Research Report on Building Energy Consumption and Carbon Emissions in China. Buildings, 46–59.

5. (1983). Thermal Insulation-Qualitative Detection of Thermal Irregularities in Building Envelopes-Infrared Method (Standard No. ISO 6781-1983(E)).