In view of the seismic response of buried oil and gas pipelines in horizontal inhomogeneous soil, the shaking table test and finite element simulation analysis of buried oil and gas pipelines were carried out, and the strain and acceleration response of buried oil and gas pipelines under different intensity seismic excitation, as well as the acceleration and displacement response law of the soil around the site were studied. The results show that the developed soil box can meet the requirements of the test, and the test scheme is reasonable and feasible; Due to the different characteristics of the soil in horizontal inhomogeneous soil, the dynamic response of different soil under the earthquake excitation is not consistent, which will form different dynamic effects on different sections of the pipeline and aggravate the dynamic response of the whole pipeline; With the improvement of the loading level, the soil is first compacted and then gradually destroyed during the vibration process. The nonlinear characteristics of the soil are more and more obvious, and the pipeline vibration phenomenon is more obvious. Compared with the homogeneous soil condition, the peak strain and peak acceleration response of the pipeline under the inhomogeneous soil condition under the same working condition are significantly increased, indicating that the soil around the pipeline is more severely damaged and the pipeline movement is more intense under the inhomogeneous soil condition. It is suggested that in the seismic design of buried pipelines, the increasing influence of inhomogeneous soil conditions and the inconsistent soil properties around the pipeline on the seismic response of the pipeline should be considered.
Dai Jianbo
,
Zhu Jiang
,
Wang Zhaocheng
,
Ma Jing
,
Zhao Zewen
. Seismic Response Analysis and Test of Oil and Gas Pipeline in Horizontal Inhomogeneous Soil[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(4)
: 1160
-1168
.
DOI: 10.20174/j.JUSE.2024.04.11
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