Abstract
In 1981 Taiwan entered a period of intense construction, meaning that today many buildings are more than 30 years old. Lack of maintenance has led to frequent safety incidents involving external walls. This study focuses on a deterioration diagnostic model for external wall tiles of aged buildings, using both stage 1 and stage 2 diagnostic methods. The visual test results are categorized based on impact on public safety, and renovation strategies are proposed. Stage 1 diagnosis mainly adopted the DER visual inspection deterioration assessment method. For enhance the accuracy, this research adopted the Infrared Thermal Imaging detection method to double confirm the visual inspection results. After producing an external wall tile Condition Indicator (CI). For stage 1 diagnostic results that fall in a gray area, stage 2 diagnosis was carried out using a tap tone test, followed by fast Fourier transform and pattern recognition to analyze the tapping results. Finally, the study provides a deterioration evaluation criteria for external wall tiles replacement recommendations and a standard operating procedure for deterioration diagnosis. The study also recommends directions for future amendment of regulations, and provides a basis of reference for the government in determining urban renewal, renovation and maintenance strategies.
Highlights
In recent years, there have been frequent safety incidents involving external walls of buildings
This study focuses on a deterioration diagnostic model for external wall tiles of aged buildings, using both stage 1and stage 2 diagnostic methods
Integrating news relating to fatalities in tile falling incidents in Taiwan, it can be seen that there is an immediate need for a complete diagnostic mechanism and preventive method to prevent the further occurrence of such public safety incidents
Summary
There have been frequent safety incidents involving external walls of buildings. On October 14, 2013, a tile falling incident in Keelung City, Taiwan, resulted in a fatality. Construction in Taiwan peaked in the years 1981 and 1994. If we take 30 years as the watershed for significant deterioration in Taiwan buildings, we can posit that the peak for safety check requirements for Taiwanese buildings should be 2011 and 2024 [1]. Integrating news relating to fatalities in tile falling incidents in Taiwan, it can be seen that there is an immediate need for a complete diagnostic mechanism and preventive method to prevent the further occurrence of such public safety incidents
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