Analysis and Evaluation of Ground Vibration Response Induced by Rapid Rail Transit
With the fast development of urban rapid rail transit, the environmental vibration problem induced by urban rapid rail transit has aroused broad attentions of the scholars and the society. Based on the ABAQUS finite-element software and track irregularity
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ANALYSIS AND EVALUATION OF GROUND VIBRATION RESPONSE INDUCED BY RAPID RAIL TRANSIT Bin Chen Institute ofGeotechnical Engin eering, Nanjing University ofTechnology, 200N Zhongshan Road, Nanj ing, China Shaoxing Quality Supervision and Manag ement Stat ion ofCivil Def ense Engin eering, Shaoxing, China Guoxing Chen, Xiaomei Su Institute ofGeotechnical Engin eering, Nanjing University of Technology, 200N Zhongshan Road, Nanjing, China With the fast development of urban rapid rail transit, the environmental vibration problem induced by urban rapid rail transit has aroused broad attentions of the scholars and the society . Based on the ABAQUS finite-element software and track irregularity theory to simulate the train vibration load, the nonlinear dynamic visco-elasto-plastic constitutive model which is based on Davidenkov model is used to describe the dynamic character of the soils. The characters of ground vibration induced by rapid rail transit are analyzed by taking Nanjing representative sites as research object. Ground surface vibration responses with different sites and different train speeds are also obtained . Ground surface acceleration vibration level is used to describe the intensity of ground surface vibration. The intensity of ground surface vibration is evaluated and analyzed to give basic information to the further research and control of ground surface vibration induced by rapid rail transit. INTRODUCTION
With the fast development of modem transportation technologies , the rail transits, such as intercity passenger train, urban light train and subway, connect big cities and have many advantages like large transport ability, high speed, low energy cost, little pollution and less land. The Chinese 6th railway speedup has been outspreaded in the main railway network from April 2007. The train speed has reached 200 km/h, and some railway sections like Beijing to Harbin, Beijing to Guangzhou, Beijing to Shanghai have reached 250 kmIh. The high-speed railway , such as Beijing to Shanghai, Beijing to Wuhan, Guangzhou to Zhuhai and Shanghai to Nanjing have been layout, and this is the symbol that China has come into the "High-speed rail transit" age. However, the urban rapid rail transit course will inevitably through or draw near the residential area or industrial park that are sensitive to the vibration. The effect on the daily life of the nearby residents, buildings , underground pipes, precision apparatus and equipments induced by ground vibration and strong noise can not be neglected. Thereby, the ground vibration induced by rapid rail transit must be analyzed and researched. For example,
Taiwan high speed railway passes through south-Taiwan high-tech zone, which is very sensitive to the foundation vibration. The vibration influence of the high speed railway to the high-tech zone has aroused increasing attention and research. FEM MODEL OF GROUND VIBRAnON MS-Word simulation of rail transit load based on track irregularity theory
Track irregularity is the main cause of the vehicle-track system vibration. T
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