地铁车站考虑变形缝因素的数值模拟研究

Numerical Simulation Study on Deformation Joints of a Subway Station

采用FLAC3D三维有限差分程序,对地下结构变形缝模拟方法进行研究与比较。数值模拟采用地层-结构模型,土体采用摩尔-库仑模型;应用link单元模拟变形缝,对link单元的本构关系及参数选用给出明确定义。结果表明,考虑变形缝后,结构变形会更加灵活、充分,变形值较未考虑变形缝的略大。

Three-dimensional finite-difference software FLAC3D was adopted for the simulation of deformation joints in an underground structure. By means of FLAC3D sirmulation a layer-structure model was established. Mohr-Coulomb criterion was followed in calculation to descnbe the soil and link eleroents were used to simulate the deformation joints. Structure became more flexible with deformation joints considered in the model, and the values of deformation were larger than those of the model without deforrmtion joints.