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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 rapid development of urban rapid rail transit, the issue of environmental vibration caused by rapid rail transit has aroused widespread concern of scholars and society. Based on ABAQUS software, the dynamic load of train is simulated based on the track irregularity theory. The dynamic viscoelasto-plastic model based on Davidenkov skeleton curve is used to describe the dynamic characteristics of the soil. Taking Nanjing’s typical site conditions as the research object, The ground vibration response under different site conditions and different train speeds is given. The surface vibration intensity is used to characterize the surface vibration intensity and the ground vibration intensity is analyzed and evaluated. In order to further study and control the orbit Ground-based traffic caused by vibration provides the basic information.