基于ABAQUS的列车振动荷载对邻近建筑的动力响应分析

Study on the Dynamic Response of Train Vibration Load on Adjacent Buildings Based on ABAQUS

随着城市化进程加快,高架铁路列车不可避免地在城市中穿行,并对周边建筑物产生影响,因此分析列车振动荷载对邻近建筑物的动力响应和受力变形特征具有重要意义。本研究借助ABAQUS有限元分析软件,对高铁列车经过某三层框架结构建筑物时的振动影响进行了仿真实验。通过分析建筑物在列车振动荷载作用下的位移、应力及加速度变化情况,结果表明:(1)建筑物底部出现较大应力,可通过增强底部结构的强度及选择耐久性良好的材料,以避免因高应力引起的疲劳和断裂失效;(2)建筑物顶部出现较大的位移,可通过增加顶部结构的刚度并优化截面尺寸,减小位移和沉降;(3)建筑物顶部出现较大的加速度,表明该区域的振动特性更为明显,可能存在共振现象。可通过增加结构刚度、改善阻尼、加装减振装置等,以减少或控制振动影响,避免共振现象发生。

With the acceleration of urbanization,elevated railway trains keep running through cities and affecting surrounding buildings.Therefore,it is of great significance to investigate the dynamic response and deformation characteristics of train vibration loads on adjacent buildings.In this study,ABAQUS finite element analysis software was used to simulate the vibration effects of a high-speed train passing through a three-story frame structure building.By analyzing the displacement,stress,and acceleration changes of buildings under train vibration loads,it's shown that:(1)there is significant stress at the bottom of the building,which can be avoided by enhancing the strength of the bottom structure and selecting materials with good durability to avoid fatigue and fracture failure;(2)a significant displacement occurs at the top of the building,which can be reduced by increasing the stiffness of the structure at the top and optimizing the cross-sectional dimensions;(3)a significant acceleration at the top of the building indicates that the vibration characteristics of the area are more pronounced and resonance may exist.Measures such as increasing structural stiffness,improving damping,and installing vibration reduction devices can be taken to alleviate or control vibration effects and avoid resonance phenomenon.