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Dr. Hyun-Ung Bae
Road Kinematics co., Ltd.

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Research Keywords & Expertise

0 Civil Engineering
0 Structural Engineering
0 Finite Element Method Simulation
0 Railway Engineering
0 Collision Test

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Journal article
Published: 15 April 2020 in Applied Sciences
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This study aims to suggest a rational analysis method for a track ballast–wheel interaction that could be further developed to model the interaction in a train-derailment event, based on the discrete-element method (DEM). Track ballast is filled with gravel to form the trackbed. Although finite-element analysis (FEA) is widely applied in structural analysis, track ballast cannot be analyzed using conventional FEA because this approach does not allow separation of elements that share nodes. The DEM has been developed to analyze the dynamic behavior of separable objects, assuming that the objects are rigid. Therefore, track ballast can be modeled as separable rigid pieces of gravel, and its dynamic behavior can be analyzed using a rational contact model. In this study, a rational numerical strategy for track ballast–wheel interaction was investigated using the DEM approach. The suggested analysis method was validated through comparison with the experimental results of a drop test. In addition, case studies were conducted to investigate the effects of the contact-model parameters on the simulation result.

ACS Style

Nam-Hyoung Lim; Kyoung-Ju Kim; Hyun-Ung Bae; Seungjun Kim. DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation. Applied Sciences 2020, 10, 2717 .

AMA Style

Nam-Hyoung Lim, Kyoung-Ju Kim, Hyun-Ung Bae, Seungjun Kim. DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation. Applied Sciences. 2020; 10 (8):2717.

Chicago/Turabian Style

Nam-Hyoung Lim; Kyoung-Ju Kim; Hyun-Ung Bae; Seungjun Kim. 2020. "DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation." Applied Sciences 10, no. 8: 2717.

Journal article
Published: 19 December 2019 in Applied Sciences
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In this study, a full-scale train bogie derailment test was conducted. For this, test methodologies to describe the wheel-climbing derailment of the train bogie and to obtain accurate test data were proposed. The derailment test was performed with the casting bogie for a freight train and a Rheda 2000 concrete track. Two different derailment velocities (28.08 km/h and 55.05 km/h) were considered. From the test, it was found that humps in the concrete track affected the post-derailment behavior of the bogie when the derailment velocity was 28.08 km/h. For a higher derailment velocity (55.05 km/h), significant lateral movement of the derailed bogie was observed. This lateral movement was first controlled by wheel–rail contact, followed by contact with the containment wall. Finally, the train was returned to the track center.

ACS Style

Hyun-Ung Bae; Jiho Moon; Seung-Jae Lim; Jong-Chan Park; Nam-Hyoung Lim; Lim. Full-Scale Train Derailment Testing and Analysis of Post-Derailment Behavior of Casting Bogie. Applied Sciences 2019, 10, 59 .

AMA Style

Hyun-Ung Bae, Jiho Moon, Seung-Jae Lim, Jong-Chan Park, Nam-Hyoung Lim, Lim. Full-Scale Train Derailment Testing and Analysis of Post-Derailment Behavior of Casting Bogie. Applied Sciences. 2019; 10 (1):59.

Chicago/Turabian Style

Hyun-Ung Bae; Jiho Moon; Seung-Jae Lim; Jong-Chan Park; Nam-Hyoung Lim; Lim. 2019. "Full-Scale Train Derailment Testing and Analysis of Post-Derailment Behavior of Casting Bogie." Applied Sciences 10, no. 1: 59.

Journal article
Published: 30 June 2019 in Journal of The Korean Society For Urban Railway
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ACS Style

Yong-Doo Kim; Seung-Jae Lim; Hyun-Ung Bae; Kyoung-Ju Kim; Chin-Ok Lee; Nam-Hyoung Lim. Some thought on the Estimating of the Impact Force by an Experiment. Journal of The Korean Society For Urban Railway 2019, 7, 205 -213.

AMA Style

Yong-Doo Kim, Seung-Jae Lim, Hyun-Ung Bae, Kyoung-Ju Kim, Chin-Ok Lee, Nam-Hyoung Lim. Some thought on the Estimating of the Impact Force by an Experiment. Journal of The Korean Society For Urban Railway. 2019; 7 (2):205-213.

Chicago/Turabian Style

Yong-Doo Kim; Seung-Jae Lim; Hyun-Ung Bae; Kyoung-Ju Kim; Chin-Ok Lee; Nam-Hyoung Lim. 2019. "Some thought on the Estimating of the Impact Force by an Experiment." Journal of The Korean Society For Urban Railway 7, no. 2: 205-213.

Journal article
Published: 30 June 2019 in Journal of The Korean Society For Urban Railway
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ACS Style

Hong-Sik Cheon; Seung-Jae Lim; Hyun-Ung Bae; Guen-Han Ryou; Nam-Hyoung Lim. Effects of the Hump in concrete Track on the Post Derailment Behavior of Freight Car. Journal of The Korean Society For Urban Railway 2019, 7, 245 -253.

AMA Style

Hong-Sik Cheon, Seung-Jae Lim, Hyun-Ung Bae, Guen-Han Ryou, Nam-Hyoung Lim. Effects of the Hump in concrete Track on the Post Derailment Behavior of Freight Car. Journal of The Korean Society For Urban Railway. 2019; 7 (2):245-253.

Chicago/Turabian Style

Hong-Sik Cheon; Seung-Jae Lim; Hyun-Ung Bae; Guen-Han Ryou; Nam-Hyoung Lim. 2019. "Effects of the Hump in concrete Track on the Post Derailment Behavior of Freight Car." Journal of The Korean Society For Urban Railway 7, no. 2: 245-253.

Journal article
Published: 25 January 2019 in NDT & E International
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Additional axial stresses in the rail are developed due to the influence of the track-bridge interaction (TBI) when the CWR (Continuous Welded Rail) track is used in the railway bridge. This is the main reason of the length limitation of railway bridge and an increase in the construction cost. Also, the track-bridge interaction analysis should be performed in order to examine the influence of track-bridge interaction. Several standards specifies analysis methods and limit values for TBI to guarantee the safety design of railway track. However, the interaction effects are not fully understood yet due to the uncertainty of ballasted track. Thus, the interaction effects should be investigated and verified based on the field test results. In this paper, the measurement and analysis method for the track-bridge interaction was proposed. For this, the measurement system was developed considering the parameters causing the track-bridge interaction, and the track-bridge interaction response caused by temperature change was measured and analyzed. From the results, the track-bridge interaction phenomenon can be fully analyzed and quantified through the measurement system presented in this study. In addition, finite element analysis was conducted and the results were compared with the measured track-bridge interaction response.

ACS Style

Kyung-Min Yun; Hyun-Ung Bae; Jiho Moon; Jung-Joong Kim; Jong-Chan Park; Nam-Hyoung Lim. Quantification of ballasted track-bridge interaction behavior due to the temperature variation through field measurements. NDT & E International 2019, 103, 84 -97.

AMA Style

Kyung-Min Yun, Hyun-Ung Bae, Jiho Moon, Jung-Joong Kim, Jong-Chan Park, Nam-Hyoung Lim. Quantification of ballasted track-bridge interaction behavior due to the temperature variation through field measurements. NDT & E International. 2019; 103 ():84-97.

Chicago/Turabian Style

Kyung-Min Yun; Hyun-Ung Bae; Jiho Moon; Jung-Joong Kim; Jong-Chan Park; Nam-Hyoung Lim. 2019. "Quantification of ballasted track-bridge interaction behavior due to the temperature variation through field measurements." NDT & E International 103, no. : 84-97.

Conference paper
Published: 13 January 2019 in Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
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Monitoring rail temperature is very important for determining the safe running speed of trains and to prevent buckling. In general, the maximum variation of the internal rail temperature can be >7 ℃ depending on the point of measurement. However, there is as yet no sufficient information about how to predict the measurement point to represent the thermal deformation due to temperature distribution. In this study, the authors report a new point, called the representative measurement point, at which the rail temperature can be measured. This point considers the average deformation of the rail through structural analysis by adopting experimental and actual rail temperature data. The authors designed and installed a measurement system similar to an actual rail environment. Using the system, various data were acquired (internal/surface rail temperature and weather data) for 10 months. On the basis of these data, an analysis was done to calculate the average deformation point through thermal analysis. Finally, the representative measurement point was proposed as the position at which the average deformation point converges regardless of weather or seasons. The authors believe that the method described herein is advantageous in that it could be used in a high-accuracy temperature-monitoring system and for predicting thermal deformation and buckling.

ACS Style

Sunguk Hong; Hyunsuk Jung; Chan Park; Hyunwoo Lee; Hyonguk Kim; Namhyoung Lim; Hyun-Ung Bae; Kyungho Kim; Hong-Jip Kim; Seong J Cho. Prediction of a representative point for rail temperature measurement by considering longitudinal deformation. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 2019, 233, 1003 -1011.

AMA Style

Sunguk Hong, Hyunsuk Jung, Chan Park, Hyunwoo Lee, Hyonguk Kim, Namhyoung Lim, Hyun-Ung Bae, Kyungho Kim, Hong-Jip Kim, Seong J Cho. Prediction of a representative point for rail temperature measurement by considering longitudinal deformation. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 2019; 233 (10):1003-1011.

Chicago/Turabian Style

Sunguk Hong; Hyunsuk Jung; Chan Park; Hyunwoo Lee; Hyonguk Kim; Namhyoung Lim; Hyun-Ung Bae; Kyungho Kim; Hong-Jip Kim; Seong J Cho. 2019. "Prediction of a representative point for rail temperature measurement by considering longitudinal deformation." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 233, no. 10: 1003-1011.

Journal article
Published: 30 September 2018 in Journal of the Korean Society for Railway
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To minimize/reduce damage by unexpected derailment accidents, physical facilities such as anti-derailing guard rails or derailment containment walls are installed. Currently, in accordance with European practice, derailment containment walls have been applied when introducing high-speed trains. However, the basis of the criteria for the design load, the location of the installation, and the specifications are tenuous, and relevant regulations have not been established and organized. In addition, objective data that can prove the effectiveness and economic feasibility in according to applying the protection facilities are insufficient worldwide. In this paper, for the first time in Korea, as a priority project to develop adequacy evaluation techniques for protection performance, a full-scale derailment/collision test was conducted to identify the characteristics of a derailed train’s behavior.

ACS Style

Jong Ho Kim; Hyun-Ung Bae; Jun Woo Kim; In Ho Song; Chin Ok Lee; Nam Hyoung Lim. Post-derailment Behavior of Casting Bogie by Full Scale Test. Journal of the Korean Society for Railway 2018, 21, 815 -829.

AMA Style

Jong Ho Kim, Hyun-Ung Bae, Jun Woo Kim, In Ho Song, Chin Ok Lee, Nam Hyoung Lim. Post-derailment Behavior of Casting Bogie by Full Scale Test. Journal of the Korean Society for Railway. 2018; 21 (8):815-829.

Chicago/Turabian Style

Jong Ho Kim; Hyun-Ung Bae; Jun Woo Kim; In Ho Song; Chin Ok Lee; Nam Hyoung Lim. 2018. "Post-derailment Behavior of Casting Bogie by Full Scale Test." Journal of the Korean Society for Railway 21, no. 8: 815-829.

Research article
Published: 14 January 2018 in Advances in Civil Engineering
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Fatal train accidents usually involve derailments or collisions. These derailment/collision accidents are infrequent. However, the damage due to derailment can be catastrophic. Derailment containment walls are usually used in Korea to minimize such damages. However, the impact forces that are needed to design the derailment containment walls were not well defined, and only limited studies were conducted for the behavior of the derailment containment walls. In this study, the focus was made on the impact force analysis of the containment wall through a series of 3D collision simulation after train derailment. Finite element modeling was conducted to analyze the dynamic behavior of the derailed train that collides with a structure such as containment wall using the LS-DYNA analysis software application. The FE models of car bodies, bogie frames, and wheel sets were created such that full conformity was achieved between their numerical models and actual vehicles with respect to the masses and principal mass moments of inertia. In addition, various installation situations of the containment wall were considered for the collision simulation. Finally, the economical alternative method to reduce the impact force was proposed.

ACS Style

Hyun-Ung Bae; Kyung-Min Yun; Jiho Moon; Nam-Hyoung Lim. Impact Force Evaluation of the Derailment Containment Wall for High-Speed Train through a Collision Simulation. Advances in Civil Engineering 2018, 2018, 1 -14.

AMA Style

Hyun-Ung Bae, Kyung-Min Yun, Jiho Moon, Nam-Hyoung Lim. Impact Force Evaluation of the Derailment Containment Wall for High-Speed Train through a Collision Simulation. Advances in Civil Engineering. 2018; 2018 ():1-14.

Chicago/Turabian Style

Hyun-Ung Bae; Kyung-Min Yun; Jiho Moon; Nam-Hyoung Lim. 2018. "Impact Force Evaluation of the Derailment Containment Wall for High-Speed Train through a Collision Simulation." Advances in Civil Engineering 2018, no. : 1-14.

Research article
Published: 20 July 2017 in Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
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A continuous welded rail has immovable zones due to its structural characteristics. In an immovable zone, thermal expansion and contraction of rails are restricted when the temperature changes, thereby causing excessive axial force on the rail. When the immovable zone of the continuous welded rail is located on a bridge, additional stress and displacement occur through track–bridge interactions. Additional stress and displacement of the rail compared to the embankment area are restricted when constructing the bridge under the continuous welded rail track to prevent problems with the track–bridge interaction according to UIC 774-3R and Euro codes. According to the various codes, the maximum allowable additional compressive stress is 72 MPa, with the conditions of a curve with a radius (R) ≥ 1500 m, UIC 60 continuous welded rail (tensile strength of at least 900 MPa), ballasted track with concrete sleepers and 30 cm of deep for a well-consolidated ballast. However, the lateral resistance that has the greatest effect on track stability can depend on the conditions mentioned above. Therefore, an additional review of various track conditions is required. In this paper, an evaluation of the current criteria was performed using the minimum buckling strength calculation formula, and the allowable additional stress on the rail suggested by codes could only be used on tracks with a large lateral resistance above 18 kN/m/track. Thus, a three-dimensional nonlinear analysis model was developed and analyzed to calculate the allowable additional compressive stress considering various track conditions. According to the results of the analysis, the allowable additional compressive stress was reduced with a comparatively small lateral resistance. The freedom of design can be enhanced with respect to the parameters of various track and bridge conditions using this model.

ACS Style

Kyung-Min Yun; Beom-Ho Park; Hyun-Ung Bae; Nam-Hyoung Lim. Suggestion for allowable additional compressive stress based on track conditions. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 2017, 232, 1309 -1325.

AMA Style

Kyung-Min Yun, Beom-Ho Park, Hyun-Ung Bae, Nam-Hyoung Lim. Suggestion for allowable additional compressive stress based on track conditions. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 2017; 232 (5):1309-1325.

Chicago/Turabian Style

Kyung-Min Yun; Beom-Ho Park; Hyun-Ung Bae; Nam-Hyoung Lim. 2017. "Suggestion for allowable additional compressive stress based on track conditions." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 232, no. 5: 1309-1325.

Research article
Published: 22 December 2016 in Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
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Europe, USA, China, Japan, and Korea, which possess advanced railway technologies, have attempted to develop high-speed rail technology and ensure safety based on social requirements and the need for greater speeds. However, despite these efforts, there have been recent reports of train accidents resulting in loss of lives. Fatal train accidents usually involve derailments or collisions that do not happen frequently. However, when they occur, the damage is catastrophic. Therefore, a protection infrastructure should be installed to minimize such damage. Since the high-speed railways were introduced in Korea, derailment containment walls have been constructed to mitigate and minimize the damages caused by such accidents. The need for the judgment of effectiveness and feasibility review of the derailment containment walls in terms of economics and construction ability has been presented by designers and constructors. In this paper, the authors have evaluated the containment capacity and collision durability (crashworthiness) of a derailment containment wall, constructed in Korea, using a collision simulation after the derailment of a train.

ACS Style

Hyun-Ung Bae; Kyung-Min Yun; Nam-Hyoung Lim. Containment capacity and estimation of crashworthiness of derailment containment walls against high-speed trains. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 2016, 232, 680 -696.

AMA Style

Hyun-Ung Bae, Kyung-Min Yun, Nam-Hyoung Lim. Containment capacity and estimation of crashworthiness of derailment containment walls against high-speed trains. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 2016; 232 (3):680-696.

Chicago/Turabian Style

Hyun-Ung Bae; Kyung-Min Yun; Nam-Hyoung Lim. 2016. "Containment capacity and estimation of crashworthiness of derailment containment walls against high-speed trains." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 232, no. 3: 680-696.

Journal article
Published: 30 April 2016 in Journal of Korean Society of Hazard Mitigation
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ACS Style

Jin-Ok Lee; Kyung-Min Yun; Hyun-Ung Bae; Nam-Hyoung Lim. Development of Nonlinear Analysis Model of CWR Track. Journal of Korean Society of Hazard Mitigation 2016, 16, 61 -68.

AMA Style

Jin-Ok Lee, Kyung-Min Yun, Hyun-Ung Bae, Nam-Hyoung Lim. Development of Nonlinear Analysis Model of CWR Track. Journal of Korean Society of Hazard Mitigation. 2016; 16 (2):61-68.

Chicago/Turabian Style

Jin-Ok Lee; Kyung-Min Yun; Hyun-Ung Bae; Nam-Hyoung Lim. 2016. "Development of Nonlinear Analysis Model of CWR Track." Journal of Korean Society of Hazard Mitigation 16, no. 2: 61-68.

Journal article
Published: 31 December 2015 in Journal of the Korea Academia-Industrial cooperation Society
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ACS Style

Shin-Hyung Choi; Beom-Ho Park; Kyung-Min Yun; Hyun-Ung Bae; Nam-Hyoung Lim. Behavior of Tension Clamp in Rail Fastening System. Journal of the Korea Academia-Industrial cooperation Society 2015, 16, 8812 -8819.

AMA Style

Shin-Hyung Choi, Beom-Ho Park, Kyung-Min Yun, Hyun-Ung Bae, Nam-Hyoung Lim. Behavior of Tension Clamp in Rail Fastening System. Journal of the Korea Academia-Industrial cooperation Society. 2015; 16 (12):8812-8819.

Chicago/Turabian Style

Shin-Hyung Choi; Beom-Ho Park; Kyung-Min Yun; Hyun-Ung Bae; Nam-Hyoung Lim. 2015. "Behavior of Tension Clamp in Rail Fastening System." Journal of the Korea Academia-Industrial cooperation Society 16, no. 12: 8812-8819.

Journal article
Published: 30 November 2015 in Journal of the Korea Academia-Industrial cooperation Society
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ACS Style

Hyun-Ung Bae; Sang-Jun Park; Kyung-Min Yun; Beom-Ho Park; Nam-Hyoung Lim. Statistical Characteristics for Longitudinal Friction Behavior of Rail Fastening System for Concrete Track. Journal of the Korea Academia-Industrial cooperation Society 2015, 16, 7870 -7877.

AMA Style

Hyun-Ung Bae, Sang-Jun Park, Kyung-Min Yun, Beom-Ho Park, Nam-Hyoung Lim. Statistical Characteristics for Longitudinal Friction Behavior of Rail Fastening System for Concrete Track. Journal of the Korea Academia-Industrial cooperation Society. 2015; 16 (11):7870-7877.

Chicago/Turabian Style

Hyun-Ung Bae; Sang-Jun Park; Kyung-Min Yun; Beom-Ho Park; Nam-Hyoung Lim. 2015. "Statistical Characteristics for Longitudinal Friction Behavior of Rail Fastening System for Concrete Track." Journal of the Korea Academia-Industrial cooperation Society 16, no. 11: 7870-7877.

Research article
Published: 23 December 2014 in Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
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Continuous welded rail (CWR) track has several advantages when compared with conventional jointed rail track. However, a thermally induced axial load can lead to the buckling of CWR tracks, which can result in train derailment. The buckling of CWR tracks is affected by several parameters, including the rail’s neutral temperature, misalignment of the rails and ballast resistance. Most of these parameters can be considered as random variables. A deterministic analysis approach is generally used to predict the buckling of CWR tracks; however, it can provide conservative results since it is based on the worst-case scenario of these buckling parameters. This paper presents a probabilistic buckling analysis scheme for CWR tracks.

ACS Style

Hyun-Ung Bae; Jin-Yu Choi; Jiho Moon; Nam-Hyoung Lim. Development of a probabilistic buckling analysis scheme for continuous welded rail track. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 2014, 230, 747 -758.

AMA Style

Hyun-Ung Bae, Jin-Yu Choi, Jiho Moon, Nam-Hyoung Lim. Development of a probabilistic buckling analysis scheme for continuous welded rail track. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 2014; 230 (3):747-758.

Chicago/Turabian Style

Hyun-Ung Bae; Jin-Yu Choi; Jiho Moon; Nam-Hyoung Lim. 2014. "Development of a probabilistic buckling analysis scheme for continuous welded rail track." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 230, no. 3: 747-758.

Journal article
Published: 31 October 2013 in Journal of Korean Society of Hazard Mitigation
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ACS Style

Myoung Soo Kim; Hyun-Ung Bae; Jin Yu Choi; Nam Hyoung Lim. Reliability Evaluation of the Speed Reduction Scheme in Korean High-speed Train based on the Reliability of the CWR Buckling. Journal of Korean Society of Hazard Mitigation 2013, 13, 291 -296.

AMA Style

Myoung Soo Kim, Hyun-Ung Bae, Jin Yu Choi, Nam Hyoung Lim. Reliability Evaluation of the Speed Reduction Scheme in Korean High-speed Train based on the Reliability of the CWR Buckling. Journal of Korean Society of Hazard Mitigation. 2013; 13 (5):291-296.

Chicago/Turabian Style

Myoung Soo Kim; Hyun-Ung Bae; Jin Yu Choi; Nam Hyoung Lim. 2013. "Reliability Evaluation of the Speed Reduction Scheme in Korean High-speed Train based on the Reliability of the CWR Buckling." Journal of Korean Society of Hazard Mitigation 13, no. 5: 291-296.

Journal article
Published: 30 September 2013 in Journal of the Korea Academia-Industrial cooperation Society
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ACS Style

Hae-Gon Kim; Hyun-Ung Bae; Chin-Ok Lee; Nam-Hyoung Lim. Structural Analysis and Design of the H-typed Railway Tie. Journal of the Korea Academia-Industrial cooperation Society 2013, 14, 4532 -4541.

AMA Style

Hae-Gon Kim, Hyun-Ung Bae, Chin-Ok Lee, Nam-Hyoung Lim. Structural Analysis and Design of the H-typed Railway Tie. Journal of the Korea Academia-Industrial cooperation Society. 2013; 14 (9):4532-4541.

Chicago/Turabian Style

Hae-Gon Kim; Hyun-Ung Bae; Chin-Ok Lee; Nam-Hyoung Lim. 2013. "Structural Analysis and Design of the H-typed Railway Tie." Journal of the Korea Academia-Industrial cooperation Society 14, no. 9: 4532-4541.

Journal article
Published: 28 February 2013 in Journal of Korean Society of Hazard Mitigation
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ACS Style

Hyun-Ung Bae; Hong Soo Choi; Gyu Sei Yi; Nam Hyoung Lim. Experimental Study on the Evaluation of the Human Stability due to Overtopping Waves in the Breakwater. Journal of Korean Society of Hazard Mitigation 2013, 13, 73 -79.

AMA Style

Hyun-Ung Bae, Hong Soo Choi, Gyu Sei Yi, Nam Hyoung Lim. Experimental Study on the Evaluation of the Human Stability due to Overtopping Waves in the Breakwater. Journal of Korean Society of Hazard Mitigation. 2013; 13 (1):73-79.

Chicago/Turabian Style

Hyun-Ung Bae; Hong Soo Choi; Gyu Sei Yi; Nam Hyoung Lim. 2013. "Experimental Study on the Evaluation of the Human Stability due to Overtopping Waves in the Breakwater." Journal of Korean Society of Hazard Mitigation 13, no. 1: 73-79.

Journal article
Published: 01 October 2012 in Applied Mechanics and Materials
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In order to ensure the safety of running train against the track buckling in a sultry weather, a speed reduction scheme has been implemented in railway operating companies. However, this scheme is based on the limited knowledge on the buckling behavior of the CWR track. The rational speed reduction scheme based on the probabilistic method for the buckling of the CWR track is proposed to apply to Korea high and normal speed railway. Permissible level of the reduced speed according to the rule of restricted speed signal, accepted degree of the buckling probability, the practically managing degree of the variation of the rail temperature, and effects of the maintenance work on the track condition are reflected in the rational speed reduction scheme.

ACS Style

Gyu Sei Yi; Hyun-Ung Bae; Jin Yu Choi; Nam Hyoung Lim. Theoretical Approach to Offer a Rational Speed Reduction Scheme in Korea Railway. Applied Mechanics and Materials 2012, 204-208, 1918 -1922.

AMA Style

Gyu Sei Yi, Hyun-Ung Bae, Jin Yu Choi, Nam Hyoung Lim. Theoretical Approach to Offer a Rational Speed Reduction Scheme in Korea Railway. Applied Mechanics and Materials. 2012; 204-208 ():1918-1922.

Chicago/Turabian Style

Gyu Sei Yi; Hyun-Ung Bae; Jin Yu Choi; Nam Hyoung Lim. 2012. "Theoretical Approach to Offer a Rational Speed Reduction Scheme in Korea Railway." Applied Mechanics and Materials 204-208, no. : 1918-1922.

Journal article
Published: 31 August 2012 in Journal of the Korea Academia-Industrial cooperation Society
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ACS Style

Hyun-Ung Bae; Kyung-Min Yun; Ik-Hyun Sung; Chin-Ok Lee; Nam-Hyoung Lim. Development of the Light Emitting System embedded Concrete Curb. Journal of the Korea Academia-Industrial cooperation Society 2012, 13, 3741 -3746.

AMA Style

Hyun-Ung Bae, Kyung-Min Yun, Ik-Hyun Sung, Chin-Ok Lee, Nam-Hyoung Lim. Development of the Light Emitting System embedded Concrete Curb. Journal of the Korea Academia-Industrial cooperation Society. 2012; 13 (8):3741-3746.

Chicago/Turabian Style

Hyun-Ung Bae; Kyung-Min Yun; Ik-Hyun Sung; Chin-Ok Lee; Nam-Hyoung Lim. 2012. "Development of the Light Emitting System embedded Concrete Curb." Journal of the Korea Academia-Industrial cooperation Society 13, no. 8: 3741-3746.