The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Mitsuo Kawatani - One of the best experts on this subject based on the ideXlab platform.
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seismic behavior of steel monorail bridges under train load during strong earthquakes
2013Co-Authors: Chul Woo Kim, Takeshi Kanbara, Mitsuo Kawatani, Nobuo NishimuraAbstract:This paper investigated dynamic responses of steel monorail bridges incorporating train-bridge interaction under strong earthquakes. Two types of steel monorail bridges were considered in the study: a conventional type with steel track-girder; an advanced type with composite track-girder and simplified lateral bracing system. During strong earthquakes, monorail train was assumed standing on the track-girder of monorail bridges. Observations through the analytical study showed that considering the monorail train as additional mass rather than a dynamic system in numerical modeling overestimated effect of the train load on seismic performance of monorail bridges. Earlier plastic deformations at the end bracing of the girder system absorbed seismic energy and reduced the stress at the pier base.
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seismic response of a monorail bridge incorporating train bridge interaction
2007Co-Authors: Chul Woo Kim, Chang Hun Lee, Mitsuo Kawatani, Nobuo NishimuraAbstract:Dynamic responses of the bridge for a straddle-type monorail subjected to the ground motion of high probability to occur are investigated by means of a three-dimensional traffic-induced vibration analysis to clarify the effect of a train`s dynamic system on seismic responses of a monorail bridge. A 15DOFs model is assumed for a car in the monorail train. The validity of developed equations of motion for a monorail train-bridge interaction system is verified by comparison with the field-test data. The inertia effect due to a ground motion is combined with the monorail train-bridge interaction system to investigate the seismic response of the monorail bridge under a moving train. An interesting result is that the dynamic system of the train on monorail bridges can act as a damper during earthquakes. The observation of numerical results also points out that the damper effect due to the dynamic system of the monorail train tends to decrease with increasing speed of the train.
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effect of train dynamics on seismic response of steel monorail bridges under moderate ground motion
2006Co-Authors: Chul Woo Kim, Mitsuo KawataniAbstract:This study is intended to investigate the seismic response of steel monorail bridges using three-dimensional dynamic response analysis. We particularly consider monorail bridge-train interaction when subjected to ground motion that occurs with high probability. A monorail train car with two bogies with pneumatic tires for running, steering and stabilizing wheels is assumed to be represented sufficiently by a discrete rigid multi-body system with 15 degrees of freedom (DOFs). Bridges are considered as an assemblage of beam elements with 6 DOFs at each node. Modal analysis is used for dynamic response analysis under moderate earthquakes. The seismic response of an advanced monorail bridge that adopts a simplified structural system and composite girders is investigated through comparison with seismic responses of a conventional bridge. The acceleration response of a monorail train is also calculated to investigate the effect of structural types of bridges on the train's dynamic response during earthquakes. Results show that the seismic responses of the advanced bridges are greater than those of the conventional monorail bridge because of the simplified structural system and increased girder weight that is attributable to composite girders of the advanced bridge. Moreover, the train on the advanced bridge shows greater dynamic response than that on the conventional bridge. Observations reveal that the dynamic monorail train system acts as a damper on the monorail bridge. That fact shows that the existing design, which considers a train as additional mass, yields a conservative result. Copyright © 2006 John Wiley & Sons, Ltd. Language: en
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dynamic response of a monorail steel bridge under a moving train
2006Co-Authors: Chang Hun Lee, Nobuo Nishimura, Mitsuo Kawatani, Chul Woo Kim, Y. KobayashiAbstract:Abstract This study proposes a dynamic response analysis procedure for traffic-induced vibration of a monorail bridge and train. Each car in the monorail train is idealized as a dynamic system of 15-degrees-of-freedom. The governing equations of motion for a three-dimensional monorail bridge–train interaction system are derived using Lagrange's formulation for monorail trains, and a finite-element method for modal analysis of monorail bridges. Analytical results on dynamic response of the monorail train and bridge are compared with field-test data in order to verify the validity of the proposed analysis procedure, and a positive correlation is found. An interesting feature of the monorail bridge response is that sway motion is caused by torsional behavior resulting from eccentricity between the shear center of the bridge section and the train load.
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Dynamic response analysis of monorail bridges under moving trains and riding comfort of trains
2005Co-Authors: Chang Hun Lee, Mitsuo Kawatani, Nobuo Nishimura, Chul Woo Kim, Takumi KamizonoAbstract:Abstract This paper introduces an analytical procedure to derive equations of motion for the monorail train–bridge interaction based on Lagrange’s formulation to investigate riding comfort of moving monorail trains on bridges. A 15 degrees-of-freedom dynamic model is assumed for a car in a monorail train that consists of driving, steering, and stabilizing wheels. It is based on the finite element method for modal analysis using three-dimensional models for a monorail bridge. Dynamic behaviors of a rationalized monorail bridge with a simplified structural system are investigated in comparison with those of a conventional monorail bridge using the developed analytical method. The riding comfort of running trains on the rationalized monorail bridge based on ISO 2631 is estimated using 1/3 octave band spectral analysis. Observations indicate that a rational type bridge does not engender difficulties related to the riding comfort of the monorail train, even when considering the longest traveling time of passengers between terminals.
Chul Woo Kim - One of the best experts on this subject based on the ideXlab platform.
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seismic behavior of steel monorail bridges under train load during strong earthquakes
2013Co-Authors: Chul Woo Kim, Takeshi Kanbara, Mitsuo Kawatani, Nobuo NishimuraAbstract:This paper investigated dynamic responses of steel monorail bridges incorporating train-bridge interaction under strong earthquakes. Two types of steel monorail bridges were considered in the study: a conventional type with steel track-girder; an advanced type with composite track-girder and simplified lateral bracing system. During strong earthquakes, monorail train was assumed standing on the track-girder of monorail bridges. Observations through the analytical study showed that considering the monorail train as additional mass rather than a dynamic system in numerical modeling overestimated effect of the train load on seismic performance of monorail bridges. Earlier plastic deformations at the end bracing of the girder system absorbed seismic energy and reduced the stress at the pier base.
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seismic response of a monorail bridge incorporating train bridge interaction
2007Co-Authors: Chul Woo Kim, Chang Hun Lee, Mitsuo Kawatani, Nobuo NishimuraAbstract:Dynamic responses of the bridge for a straddle-type monorail subjected to the ground motion of high probability to occur are investigated by means of a three-dimensional traffic-induced vibration analysis to clarify the effect of a train`s dynamic system on seismic responses of a monorail bridge. A 15DOFs model is assumed for a car in the monorail train. The validity of developed equations of motion for a monorail train-bridge interaction system is verified by comparison with the field-test data. The inertia effect due to a ground motion is combined with the monorail train-bridge interaction system to investigate the seismic response of the monorail bridge under a moving train. An interesting result is that the dynamic system of the train on monorail bridges can act as a damper during earthquakes. The observation of numerical results also points out that the damper effect due to the dynamic system of the monorail train tends to decrease with increasing speed of the train.
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effect of train dynamics on seismic response of steel monorail bridges under moderate ground motion
2006Co-Authors: Chul Woo Kim, Mitsuo KawataniAbstract:This study is intended to investigate the seismic response of steel monorail bridges using three-dimensional dynamic response analysis. We particularly consider monorail bridge-train interaction when subjected to ground motion that occurs with high probability. A monorail train car with two bogies with pneumatic tires for running, steering and stabilizing wheels is assumed to be represented sufficiently by a discrete rigid multi-body system with 15 degrees of freedom (DOFs). Bridges are considered as an assemblage of beam elements with 6 DOFs at each node. Modal analysis is used for dynamic response analysis under moderate earthquakes. The seismic response of an advanced monorail bridge that adopts a simplified structural system and composite girders is investigated through comparison with seismic responses of a conventional bridge. The acceleration response of a monorail train is also calculated to investigate the effect of structural types of bridges on the train's dynamic response during earthquakes. Results show that the seismic responses of the advanced bridges are greater than those of the conventional monorail bridge because of the simplified structural system and increased girder weight that is attributable to composite girders of the advanced bridge. Moreover, the train on the advanced bridge shows greater dynamic response than that on the conventional bridge. Observations reveal that the dynamic monorail train system acts as a damper on the monorail bridge. That fact shows that the existing design, which considers a train as additional mass, yields a conservative result. Copyright © 2006 John Wiley & Sons, Ltd. Language: en
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dynamic response of a monorail steel bridge under a moving train
2006Co-Authors: Chang Hun Lee, Nobuo Nishimura, Mitsuo Kawatani, Chul Woo Kim, Y. KobayashiAbstract:Abstract This study proposes a dynamic response analysis procedure for traffic-induced vibration of a monorail bridge and train. Each car in the monorail train is idealized as a dynamic system of 15-degrees-of-freedom. The governing equations of motion for a three-dimensional monorail bridge–train interaction system are derived using Lagrange's formulation for monorail trains, and a finite-element method for modal analysis of monorail bridges. Analytical results on dynamic response of the monorail train and bridge are compared with field-test data in order to verify the validity of the proposed analysis procedure, and a positive correlation is found. An interesting feature of the monorail bridge response is that sway motion is caused by torsional behavior resulting from eccentricity between the shear center of the bridge section and the train load.
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Dynamic response analysis of monorail bridges under moving trains and riding comfort of trains
2005Co-Authors: Chang Hun Lee, Mitsuo Kawatani, Nobuo Nishimura, Chul Woo Kim, Takumi KamizonoAbstract:Abstract This paper introduces an analytical procedure to derive equations of motion for the monorail train–bridge interaction based on Lagrange’s formulation to investigate riding comfort of moving monorail trains on bridges. A 15 degrees-of-freedom dynamic model is assumed for a car in a monorail train that consists of driving, steering, and stabilizing wheels. It is based on the finite element method for modal analysis using three-dimensional models for a monorail bridge. Dynamic behaviors of a rationalized monorail bridge with a simplified structural system are investigated in comparison with those of a conventional monorail bridge using the developed analytical method. The riding comfort of running trains on the rationalized monorail bridge based on ISO 2631 is estimated using 1/3 octave band spectral analysis. Observations indicate that a rational type bridge does not engender difficulties related to the riding comfort of the monorail train, even when considering the longest traveling time of passengers between terminals.
Tamer Eren - One of the best experts on this subject based on the ideXlab platform.
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an application of multicriteria decision making for the evaluation of alternative monorail routes
2018Co-Authors: Mustafa Hamurcu, Tamer ErenAbstract:Urban transportation planning is important for a metropolitan city. Route selection, which is among the decisions of urban transportation planning, is also important in terms of developing the urban transportation. This study contains the route selection for the planned monorail transport system that is a new system in Ankara. The most suitable monorail route was selected among the determined eight alternative monorail routes. In this decision process, we used the Analytic Network Process (ANP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, which is one of the multi-criteria decision-making methods. Finally, we provided the most suitable ranking and planning with the selection process for the development of urban transportation.
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transportation planning with analytic hierarchy process and goal programming
2018Co-Authors: Mustafa Hamurcu, Tamer ErenAbstract:Transportation planning process, which requires a multi-criteria decision making a very specific decision, is one of the most important issues of metropolitan cities. There are many projects in the field of rail systems in Istanbul and some of these projects are monorail projects. Through this way, urban transportation is supported by various types of public transportation. However, it is not possible to allocate the resources to all projects at the same time. This is affected by several criteria, especially by limited budgetary constraints. In this study, monorail projects were evaluated in accordance with urban needs of Istanbul and the planning was done under three different budget scenarios. The analytic hierarchy process (AHP) was used in the evaluation process of the projects and the goal programming (GP) model was used for the selection process. As a result, the selection of the monorail projects planned for Istanbul was made.
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transportation planning with analytic hierarchy process and goal programming
2017Co-Authors: Mustafa Hamurcu, Tamer ErenAbstract:Transport planning process, which required to multi criteria decision making a very specific decision, is one of the most important issues of metropolitan cities. There are many projects in the field of rail systems in Istanbul and some of these projects are monorail projects. In this way, urban transportation is supported with various types of public transportation. However, it is not possible to allocate resources for all projects at the same time. This is affected by several criteria, especially limited budgetary constraints. In this study, monorail projects were evaluated within the scope of urban needs of Istanbul and planned under 3 different budget scenarios. The analytic hierarchy process (AHP) was used in the evaluation process of the projects and the goal programming (GP) model for the selection process. As a result, the monorail projects planned for Istanbul were selected.
Li Yan - One of the best experts on this subject based on the ideXlab platform.
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utilize enter station intermittent type s suspension type monorail quick charging device of train
2018Co-Authors: Hu Lianjun, Xu Yinguang, Lin Shijin, Yu Haowei, Yang Jizhong, Lin Hongsong, Yao Xiaojun, Wang Zhiqiang, Li YanAbstract:Utilize enter station intermittent type's suspension type monorail quick charging device of train, utilization station place power supply source is the quick charge of suspension type monorail to effectively guarantee suspension type monorail's duration. Suspension type monorail includes the bogie and hangs the automobile body of orientation under it that the bogie lies in the track roof beam andsupports in walking capable rail. The track roof beam is the fixed power supply rail that sets up on the inner wall of regional inherent its the both sides web of platform, and the bogie both sides are fixed and are set up condact rail corresponding with homonymy power supply rail and that contact, with fixed the setting on the bogie or in the automobile body of the electric energy storage moduleof being connected of condact rail.
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suspension type monorail train quick charging device using train station entering interval
2018Co-Authors: Hu Lianjun, Xu Yinguang, Lin Shijin, Yu Haowei, Yang Jizhong, Lin Hongsong, Yao Xiaojun, Wang Zhiqiang, Li YanAbstract:The invention provides a suspension type monorail train quick charging device using a train station entering interval. A power source provided by a station yard is used for quickly charging a suspension type monorail train, so that the cruising ability of the suspension type monorail train is effectively guaranteed. The suspension type monorail train comprises a bogie and a train body suspended below the bogie, and the bogie is located in a track beam and supported on running rails. Power supply rails are fixedly arranged on the inner walls of webs on the two sides of the portion, in a platform area, of the track beam, the two sides of the bogie are fixedly provided with contact rails corresponding to and making contact with the power supply rails on the same sides, and an energy storage module electrically connected with the contact rails is fixedly arranged on the bogie or in the train body.
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straddle type monorail train double mode drive bogie adaptable to great ramp
2018Co-Authors: Li Yan, Xu Yinguang, Zhang Maofan, Wang Kongming, Chen Ming, Wu Xiao, Wei DehaoAbstract:The invention discloses a straddle-type monorail train double-mode drive bogie adaptable to a great ramp, and the straddle-type monorail train double-mode drive bogie adaptable to the great ramp can effectively improve the gradeability of a straddle-type monorail train and the adaptability in frequent rain and snow areas, avoids the rapid wear of walking wheels, and realizes the reasonable power configuration of the whole line of operation. The straddle-type monorail train double-mode drive bogie comprises a machine frame, two pairs of walking wheels and a drive motor thereof, wherein the twopairs of walking wheels and the drive motor are arranged on the motor frame, and the walking wheels take the top surface of a concrete rail beam as a walking surface. The machine frame is fixedly provided with a second drive motor and a rack gear driven by the second drive motor, and a rack rail is arranged on the concrete rail beam, and the rack gear meshes with a tooth groove on the upper portion of the rack rail.
Nobuo Nishimura - One of the best experts on this subject based on the ideXlab platform.
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seismic behavior of steel monorail bridges under train load during strong earthquakes
2013Co-Authors: Chul Woo Kim, Takeshi Kanbara, Mitsuo Kawatani, Nobuo NishimuraAbstract:This paper investigated dynamic responses of steel monorail bridges incorporating train-bridge interaction under strong earthquakes. Two types of steel monorail bridges were considered in the study: a conventional type with steel track-girder; an advanced type with composite track-girder and simplified lateral bracing system. During strong earthquakes, monorail train was assumed standing on the track-girder of monorail bridges. Observations through the analytical study showed that considering the monorail train as additional mass rather than a dynamic system in numerical modeling overestimated effect of the train load on seismic performance of monorail bridges. Earlier plastic deformations at the end bracing of the girder system absorbed seismic energy and reduced the stress at the pier base.
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seismic response of a monorail bridge incorporating train bridge interaction
2007Co-Authors: Chul Woo Kim, Chang Hun Lee, Mitsuo Kawatani, Nobuo NishimuraAbstract:Dynamic responses of the bridge for a straddle-type monorail subjected to the ground motion of high probability to occur are investigated by means of a three-dimensional traffic-induced vibration analysis to clarify the effect of a train`s dynamic system on seismic responses of a monorail bridge. A 15DOFs model is assumed for a car in the monorail train. The validity of developed equations of motion for a monorail train-bridge interaction system is verified by comparison with the field-test data. The inertia effect due to a ground motion is combined with the monorail train-bridge interaction system to investigate the seismic response of the monorail bridge under a moving train. An interesting result is that the dynamic system of the train on monorail bridges can act as a damper during earthquakes. The observation of numerical results also points out that the damper effect due to the dynamic system of the monorail train tends to decrease with increasing speed of the train.
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dynamic response of a monorail steel bridge under a moving train
2006Co-Authors: Chang Hun Lee, Nobuo Nishimura, Mitsuo Kawatani, Chul Woo Kim, Y. KobayashiAbstract:Abstract This study proposes a dynamic response analysis procedure for traffic-induced vibration of a monorail bridge and train. Each car in the monorail train is idealized as a dynamic system of 15-degrees-of-freedom. The governing equations of motion for a three-dimensional monorail bridge–train interaction system are derived using Lagrange's formulation for monorail trains, and a finite-element method for modal analysis of monorail bridges. Analytical results on dynamic response of the monorail train and bridge are compared with field-test data in order to verify the validity of the proposed analysis procedure, and a positive correlation is found. An interesting feature of the monorail bridge response is that sway motion is caused by torsional behavior resulting from eccentricity between the shear center of the bridge section and the train load.
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Dynamic response analysis of monorail bridges under moving trains and riding comfort of trains
2005Co-Authors: Chang Hun Lee, Mitsuo Kawatani, Nobuo Nishimura, Chul Woo Kim, Takumi KamizonoAbstract:Abstract This paper introduces an analytical procedure to derive equations of motion for the monorail train–bridge interaction based on Lagrange’s formulation to investigate riding comfort of moving monorail trains on bridges. A 15 degrees-of-freedom dynamic model is assumed for a car in a monorail train that consists of driving, steering, and stabilizing wheels. It is based on the finite element method for modal analysis using three-dimensional models for a monorail bridge. Dynamic behaviors of a rationalized monorail bridge with a simplified structural system are investigated in comparison with those of a conventional monorail bridge using the developed analytical method. The riding comfort of running trains on the rationalized monorail bridge based on ISO 2631 is estimated using 1/3 octave band spectral analysis. Observations indicate that a rational type bridge does not engender difficulties related to the riding comfort of the monorail train, even when considering the longest traveling time of passengers between terminals.