Abstract

Since the 1970s, Korea has achieved exponential economic growth over a short period of time, with a huge amount of infrastructure built. However, 30 years on, this infrastructure is now deteriorating at a rapid pace due to extensive use and climatic factors, raising safety issues in recent years. The current task force faces limitations in monitoring and maintenance due to various reasons: Insufficient budget, increasing number of infrastructure facilities requiring maintenance, shortage of manpower, and a rapidly increasing number of aging infrastructure facilities. To overcome these limitations, a new approach is required that is different from the manual inspection methods under the existing rules and regulations. In this context, this study aimed to explore the efficiency of bridge inspection for cracks by an Unmanned Aerial Vehicle (UAV) that could observe inaccessible areas, could be conveniently and easily controlled, and could offer high economic benefits. A case study of UAV-based crack detection for Wonjudaegyo Bridge, Korea was performed. The results show more effective detection of cracks in the structure than traditional methods.

Highlights

  • Bridges are an important example of infrastructure

  • This study considered the use of a Unmanned Aerial Vehicle (UAV), which has advantages in terms of economy, convenience, and data acquisition in inaccessible areas, as an alternative to existing methods

  • We selected Wonjudaegyo Bridge as the case study and used a rotary-wing UAV named Aibotix, which is manufactured by Leica

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Summary

Introduction

Bridges are an important example of infrastructure. They are directly related to public safety from a socioeconomic perspective, and are critical infrastructure components for transport and logistics, which are integral to economic activities. Public infrastructure safety is a common concern in Korea and in many other countries that have achieved dramatic economic development over a short period of time. In the case of Korea, infrastructure facilities were mainly built during the 1970s and 1980s, when compressed economic development occurred. Infrastructure facilities that were built 30 or more years ago are generally classified as aged infrastructure. The systematic maintenance, repair, and reinforcement of aged infrastructure facilities, processes which are related to securing the national safety network, are critical problems.

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