非一致激励下综合管廊振动台试验的数值模拟

本文基于ABAQUS软件开展非一致激励下地下综合管廊振动台试验的有限元建模及分析研究。建模中采用Drucker-Prager模型来考虑土体非线性,土-结构动力相互作用通过建立主从接触面来实现,通过考虑层状剪切砂箱对土体的作用来模拟试验模型箱,同时考虑初始应力场的平衡。响应时程及放大系数等参量的对比,表明数值模拟结果和试验结果吻合较好,文中所提有限元建模方法合理,为后续参数分析奠定了基础。

Numerical Simulation of Utility Tunnel in Shaking Table Test Under Non-uniform Seismic Excitation

The response of utility tunnel under non-uniform seismic excitation in shaking table test is analyzed using ABAQUS as a platform.The nonlinear property of soil is modeled by Drucker-Prager constitutive model and the master-slave surfaces are established to simulate the soil-structure dynamic interaction.The effect that the laminar shear box applied to soil is considered to simulate the boundary effect.Meanwhile,the initial balance conditions of gravity field are also considered.The numerical results are compared with experiment measurements in terms of displacement,acceleration and amplifying factor.The comparisons show that the numerical results and the test match quite well,which may serve as a sound foundation for further investigations.