快速轨道交通运行引起的场地振动分析与评价

Analysis and Evaluation of Ground Vibration Response Induced by Rapid Rail Transit

随着城市快速轨道交通的快速发展,快速轨道交通运行引起的环境振动问题引起了学者和社会的广泛关注。以ABAQUS软件为计算平台,基于轨道不平顺理论模拟列车振动荷载,采用基于Davidenkov骨架曲线的动粘弹塑性模型描述土的动力特性,以南京的典型场地条件为研究对象,对快速轨道交通运行引起的地振动特性进行了分析,给出了不同场地条件和不同列车车速下的地表振动反应;采用地表加速度振级表征地表振动强度,对地表振动强度进行了分析和评价,为进一步研究和控制轨道交通运行引起的地表振动提供了基础性资料。

With the high-speed development of the urban rapid rail transit, the environmental vibration problem induced by urban rapid rail transit has attracted attentions of the scholars and the society. Based on ABAQUS finite - element software, with the track irregularity theory the train vibration load is simulated. The soil dynamic visco-elas- to-plastic constitutive model based on Davidenkov model is used to describe the dynamic character of the soil. The characters of ground vibration induced by the rapid rail transit are analyzed by taking a Nanjing representative site as the research object. The ground surface vibration responses at different sites and different train speeds are also obtained. The ground surface acceleration vibration level is used to describe the intensity of ground surface vibration. The intensity of the ground surface vibration is evaluated and analyzed to give basic information to the further research and control of the ground surface vibration induced by rapid rail transit.