• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.2
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• pp.165-176
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• 2006

This paper deals with the experiment and construction case of concrete beams strengthened with wire rope using the tightening force of bolts. The mechanical bolting of wire rope for prestressing force is adopted, which is very easy for construction. For the flexural strengthening effect of the proposed method, the experiment was proceeded as follows. The main parameters of specimens, concrete strength is 24MPa, are initial prestressing forces of wire rope and the number of saddle. The flexural strengths of strengthened specimens compared with non-strengthened test piece were increased about 160%. Also, as the initial prestressing forces were increased, the crack and ultimate moments were increased. The number of saddle did not play an important role for the moment capacity. This proposed method as a construction example showed a more competitive method than any others.

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.4
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• pp.407-415
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• 2023

In this study, a carbonation test was conducted on cementitious composites reinforced with recycled waste rope fibers (W series) according to EN 12390-12 standards. The test results were compared to those of commercially available polypropylene fibers (P series). In the carbonation test, both the carbonation depth and area were significantly influenced by the water-to-cement ratio. Notably, the carbonation resistance performance of cementitious composites containing waste rope fibers surpassed that of commercially available PP fibers under equivalent conditions. Throughout the 250-day test period, the W series exhibited higher compressive strength values than the P series, while both series displayed a similar trend of strength increase during the same duration. During the initial stage, the W series exhibited flexural strength levels similar to those of the P series. However, in the later stages, the P series showed a higher mean flexural strength by 1.0 MPa.

• Journal of the Korean Society of Hazard Mitigation
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• v.8 no.6
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• pp.21-30
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• 2008

In this study, to evaluate the aerodynamic stability of suspension bridge hanger ropes, the wind tunnel tests are carried out. It is found that the vortex induced vibration is detected only in single PE-coated PWS cable case. And the wake galloping is occurred in twin cables spaced $3\sim6$ cable diameters of cable center to center when the incidence angle of wind is only zero degree. In case of other incidence angles of wind except zero degree, the wake galloping or the wake flutter are showed in twin cables even outside range of the bounds of $3\sim6$ cable diameters. CFRC cable shows very stable for the twin cables regardless of the distance between two cables, and also for various incidence angles of wind. Thus the characteristic of CFRC rope overwhelms one of PWS cable in aerodynamic stability.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.19 no.5
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• pp.60-66
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• 2020

In this paper, we describe a rope tension automatic equalizer that automatically adjusts several rope tensions connecting the elevator car and the counterweight. The automatic rope tension equalizer is composed of a body, ram, and rope shaft. The body includes a cylinder hole, in which a ram is assembled. A rope shaft is assembled in a hole in the ram. Moreover, the rope is fixed to the rope shaft, with a hole through which fluid can pass between each cylinder hole and the hole of the body. The central concept is that the force of each rope is evenly distributed by the hydraulic pressure between the ram and the body cylinder when the rope is pulled. The thickness of the jaw connecting the small and large diameters of the body of the rope tension automatic equalizer was 15 mm based on structural analysis. The results of the representative experiment to install the produced rope tension equalizer on the elevator revealed it was possible to reduce the rope tension deviation by more than 71 kg.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.25 no.5
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• pp.375-380
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• 2012

In this study, dynamic load and dynamic contact force between a building block and wire ropes of a goliath crane are calculated during lifting or turn-over of a building block for the design of an optimal lug arrangement system. In addition, a multibody dynamics kernel for implementing the system were developed. In the multibody dynamics kernel, the equations of motion are constructed using recursive formulation. To evaluate the applicability of the developed kernels, the interferences and dynamic contact force between the building block and wire ropes were calculated and then the hull structural analysis for the block was performed using the calculation result.

• The Korean Chronic Disease News
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• no.89
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• pp.9.1-9.1
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• 1988

• 기계와재료
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• v.20 no.3
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• pp.129-138
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• 2008

• Nuclear industry
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• v.28 no.7
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• pp.31-42
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• 2008

• The Science & Technology
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• v.24 no.7 s.266
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• pp.60-63
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• 1991

• 한국만화애니메이션학회:학술대회논문집
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• 2011.05a
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• pp.41-51
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• 2011