摘要
以某框架结构办公楼为研究对象,将建筑物和开洞地基看作一个有机的整体,按照结构-土体-隧道共同作用进行分析。利用有限元软件ANSYS10.0建立三维非线性有限元模型,研究计算了盾构法地铁隧道穿越建筑物时对建筑物自身沉降和内力的影响。分析结果表明,建筑物基础的沉降主要发生在地铁隧道穿越建筑物的区间段内;建筑物的横向倾斜随着盾构的掘进逐渐增大,而其纵向倾斜量最大值则出现在开挖面在建筑物中线附近时;在盾构穿越建筑物的过程中柱子的等效应力增幅可达20.1%;相对于弯矩而言,建筑物构件的扭矩变化更为显著;当开挖面越过建筑物20m时其变形和内力均趋于稳定。
Taking a frame structure office building for example, a 3D nonlinear constitutive model regarding the building and its foundation with cavern as a whole and taking into account the tunnel-soil-structure interaction is put forward by means of general FEM program ANSYS10.0. Its differential settlement and variation of internal force due to the passage of a shield tunnel is investigated. The result indicates that major settlement of the foundation of the building occurs in the zone where the shield tunnel passes through the building; its transverse obliquity increases along with the shield advance, while its longitudinal obliquity reaches the maximum when the excavation face is close to the centerline of the building; during the passing course the equivalent stress of columns can rise by 20.1% at most; torque of structural components changes more obviously compared with their bending moment; its deformation and internal force tend to be constant when the excavation face overpasses the building for 20 meters.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第11期3047-3052,共6页
Rock and Soil Mechanics
关键词
地铁隧道
相邻建筑物
有限元
沉降
内力
metro tunnel
adjacent building
finite elements
settlement
internal force
