Abstract:In order to study the influence of the soil box boundary on the shaking table test of buried oil and gas pipelines under non-uniform seismic excitation, this paper designs a bi-directional laminated shear type continuum model box for this test on the basis of the model box developed at home and abroad for shaking table. The finite element analysis software ABAQUS was used to analyze the vibration pattern of the designed model box, and the shaker test results were compared with the numerical simulation results to investigate the applicability and stability of the model box under consistent and non-coherent seismic excitation. The analysis results show that the self-vibration frequency of the designed model box differs from that of the box-soil, i.e., the model box has less influence on the self-vibration characteristics of the soil inside the model box; the soil acceleration time course curves at different measurement points at the same depth match to a high degree, i.e., the boundary effect of the model box is small; the soil displacement time course curves at different heights fluctuate to a large extent, i.e., the interlayer shear deformation capacity of the model box has a good effect. The displacement time course curves at the two ends of the box at the same height show obvious difference, i.e. the effect of staggered deformation at the two ends of the box is ideal. Therefore, the two-way laminar shear continuum model box designed in this paper can realize the shear deformation effect and reduce the influence of the model box boundary effect, and the development of this model box provides a solid guarantee for future research on the seismic response of buried pipelines.
代建波1,胡成涛2. 振动台试验双向层状剪切型连续体模型箱设计及测试[J]. 振动与冲击, 2023, 42(18): 164-171.
DAI Jianbo1,HU Chengtao2. Design and testing of a bi-directional laminar shear type continuum model box used for shaking table tests of buried pipelines. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(18): 164-171.
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