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http://dx.doi.org/10.7843/kgs.2019.35.12.123

Small-Scaled Laboratory Experiments for Dynamic Stability Monitoring of Large Circular Steel Pipe Cofferdam of Marine Bridge Foundation  

Park, Min-Chul (School of Architecture and Civil Engrg., Korea Univ.)
Lee, Jong-Sub (School of Architecture and Civil Engrg., Korea Univ.)
Kim, Dongho (School of Architecture and Civil Engrg., Korea Univ.)
Yu, Jung-Doung (School of Architecture and Civil Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.12, 2019 , pp. 123-134 More about this Journal
Abstract
This study presents dynamic responses of circular pipe models as a part of fundamental studies on dynamic stability monitoring of the large circular steel pipe cofferdam with the ship collision. Small-scaled laboratory experiments are performed with a single and bolted circular steel pipes with a diameter, thickness, and height of 30, 0.4, 90 cm, respectively. The bolted circular steel pipe is configured with three segments of 30 cm in height. Circular steel pipe models are embedded in a soil tank, all 1 m in length, width, and height. The thickness of soil in the soil tank is set at 23 cm. The ship collision is simulated with a hammer impacting. The dynamic responses are investigated with different water levels of 25, 40, 55, and 70 cm. Experimental results show that a signal energy decreases with increasing water level. More sensitive reduction in the energy appears for the bolted circular steel pipe. A predominant frequency decreases with increasing water level for both single and bolted steel pipes. The minor reduction in the frequency appears for the bolted circular steel pipe under the water level of 70 cm. This study suggests that the signal energy and frequency response is useful for the dynamic stability monitoring of the large circular steel pipe cofferdam.
Keywords
Accelerometer; Dynamic response; Large circular steel pipe cofferdam; Ship collision;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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