• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.19 no.2
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• pp.14-18
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• 2015

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.18 no.2
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• pp.64-67
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• 2014

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.20 no.2
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• pp.34-38
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• 2016

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.21 no.1
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• pp.4-13
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• 2017

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.17 no.4
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• pp.10-16
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• 2013

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.17 no.4
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• pp.43-52
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• 2013

• Journal of Korean Society of Disaster and Security
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• v.15 no.4
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• pp.11-20
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• 2022

The general non-destructive inspection method for anchor bolts in Korea applies visual inspection and hammering inspection, but it is difficult to check corrosion or fatigue cracks of anchor bolts in the part included in the foundation or in the part where the nut and base plate are installed. In reality, objective investigation is difficult because inspection is affected by the surrounding environment and individual differences, so it is necessary to develop non-destructive inspection technology that can quantitatively estimate these defects. Inspection of the anchor bolts of domestic road facilities is carried out by visual inspection, and since the importance of anchor bolts such as bridge bearings and fall prevention facilities is high, the life span of bridges is extended through preventive maintenance by developing non-destructive testing technology along with existing inspection methods. Through the development of this technology, non-destructive testing of anchor bolts is performed and as a technology capable of preemptive/active maintenance of anchor bolts for road facilities, practical use is urgently needed. In this paper, the possibility of detecting defects in anchor bolts such as corrosion and cracks and reliability were experimentally verified by applying the ultrasonic test among non-destructive inspection techniques. When the technology development is completed, it is expected that it will be possible to realize preemptive/active maintenance of anchor bolts by securing source technology for improving inspection reliability.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.115-116
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• 2014

This study investigated power generation of photovoltaic equipment at detached houses. The study estimated monthly mean generation according to maintenance conditions that included module cleaning, inspection into generation, cleaning of module and photovoltaic generation. At analysis upon generation, households with periodical module cleaning and inspection into generation, clean module and good generation conditions had high generation. 20-years of PV equipment life varied much depending upon maintenance conditions. Users should keep module clean and inspect generation regularly and put PV equipment at the place with good solar radiation.

• Journal of the Korean Society for Precision Engineering
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• v.30 no.4
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• pp.359-367
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• 2013

With recent growth of the economy and development of construction technology, the increase of high-rise buildings is appearing rapidly in urban areas. For this reason, the interest in building maintenance has also been increasing. However, it has many safety problems because it is difficult for the workers to access the exterior wall of building. Therefore, the maintenance system of high-rise building stands out as being important issues to be developed, so that a variety of robot systems have been developed to accomplish the building-wall maintenance works. In this paper, the maintenance robots are classified in painting, inspecting, cleaning systems according to the maintenance works. Then, their locomotion and adhesion mechanisms are analyzed including their applicability to the real maintenance works. This study can be used to develop maintenance robotic system that is more efficient and stable than existing ones.

• Journal of the Korea institute for structural maintenance and inspection
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• v.8 no.4
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• pp.247-256
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• 2004

The damage curves for the 2-story shear building to the impulsive rectangular loads were established with the peak load and Impulse ratio producing the critical displacement. The convolution integrations with the Impulse response matrix and the loads were used to find the responses of the building. The impulse response matrix required in the calculations of the convolution integration were found with the mode superposition method It is shown from the established damage curves that the responses of the top and bottom floor are sensitive to the magnitude and the impulse of the loads respectively.