近断层脉冲型地震作用下砂土地基埋地管道动力响应研究

谢忠武; 邹毅; 张顺; 蔡国帧; 李森; 宋来福; 蔡嘉煜

doi:10.20265/j.cnki.issn.1007-2993.2025-0126

近断层脉冲型地震作用下砂土地基埋地管道动力响应研究

doi: 10.20265/j.cnki.issn.1007-2993.2025-0126

谢忠武^1,,
邹毅¹,
张顺²,
蔡国帧¹,
李森¹,
宋来福^2, ,,
蔡嘉煜²

1.
温州市教育基建中心，浙江温州　325000
2.
温州大学建筑工程学院，浙江温州　325035

基金项目: 国家自然科学基金资助项目（52378364）；浙江省自然科学基金项目（LTGG23E080003）

详细信息

作者简介:
谢忠武，男，1977年生，大学本科，主要从事埋地管道数值模拟研究。E-mail：15968759810@163.com

通讯作者:
宋来福，男，1985年生，博士，副教授，主要从事埋地管道力学性能及安全评价研究。E-mail：songlaifu_jia@wzu.edu.cn

中图分类号: TU435
计量
- 文章访问数: 20
- HTML全文浏览量: 7
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2025-03-19
- 修回日期: 2025-09-04
- 录用日期: 2025-11-11
- 刊出日期: 2026-08-08

Dynamic response of buried pipelines in sandy foundations subject to near-fault pulse-type seismic loading

1.
Wenzhou Education Capital Construction Center, Wenzhou 325000, Zhejiang, China
2.
College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, Zhejiang, China

摘要

摘要: 近断层脉冲型地震作用下饱和砂土液化会加剧埋地管道的上浮和破坏，严重威胁埋地管道的长期安全运行。为探究近断层脉冲地震作用下埋地管道的动力响应，基于谱−随机函数方法，提出了一种生成非平稳近断层地震动时程的方法；基于生成的近断层脉冲型地震动，系统研究了近断层脉冲地震作用下砂土地基埋地管道的液化机理和动力响应，分析了与非脉冲地震动作用下埋地管道动力响应的差异。结果表明：合成的含有低频脉冲的地震动能够有效模拟近断层地震动的脉冲特征；在地震作用下，孔隙水压力上升、土体有效应力丧失致使土壤液化引发管道漂移、上浮；与非脉冲地震动相比，近断层脉冲型地震动对管道的动力响应影响更大，对管道的危害大，严重威胁管道的安全运行。
- 近断层脉冲型地震 /
- 埋地管道 /
- 液化 /
- 数值模拟
Abstract: The liquefaction of saturated sandy soil under the influence of near-fault pulse seismic loading exacerbates the buoyancy and destruction of buried pipelines, posing a serious threat to their long-term safe operation. To investigate the dynamic response of buried pipelines under near-fault pulse seismic loading, this paper proposes a method for generating non-stationary near-fault seismic motion time histories based on the spectral-stochastic function method. Based on the generated near-fault pulse seismic motion, the liquefaction mechanism and dynamic response of buried pipelines in sandy soil foundations under near-fault pulse seismic loading are systematically studied, and the differences from the dynamic response of buried pipelines under non-pulse seismic loading are analyzed. The results show that the synthesized seismic motion containing low-frequency pulses can effectively simulate the pulse characteristics of near-fault seismic motion; under seismic loading, the rise in pore water pressure and the loss of effective stress in the soil lead to soil liquefaction, causing pipeline drift and buoyancy. The pulse-type seismic loading has a greater impact on the dynamic response of the pipeline, causing greater damage and posing a serious threat to the safe operation of the pipeline.
- near-fault pulse seismic loading /
- buried pipeline /
- liquefaction /
- numerical simulation

HTML全文

图 1 近断层脉冲型地震动合成

Figure 1. Synthesis of near-fault pulse-like ground motions

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图 2 数值模拟计算模型图

Figure 2. Numerical simulation calculation model diagrams

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图 3 自由场边界图

Figure 3. Free-field boundary diagram

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图 4 监测点位置示意图

Figure 4. Schematic location of monitoring points

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图 5 不同监测点超孔隙水压力时程曲线图

Figure 5. Time course curve of super pore water pressure at different monitoring points

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图 6 超孔隙水压力时程曲线图

Figure 6. Hyperporous water pressure time-course graph

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图 7 管道水平位移变化曲线图

Figure 7. Horizontal displacement curve

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图 8 管道竖向位移变化曲线图

Figure 8. Vertical displacement variation curve of pipeline

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图 9 管道轴向应力图

Figure 9. Pipe axial stress diagram

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图 10 管道环向应力图

Figure 10. Pipe circumferential stress diagram

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表 1 合成近断层脉冲型地震动的随机变量

Table 1. Random variables for synthetic pulsed ground motion

参数	分布	均值	标准差
$ T\mathrm{_P} $	正态	6.75	2.56
$ \sigma_{\ln\mathrm{PGV}} $	正态	0	0.29
$ T\mathrm{_{\rm{Pk}}} $	正态	27.8	3.1
v	正态	1.94	2.58
$ N\mathrm{_c} $	对数正态	0.74	0.24

下载: 导出CSV

表 2 计算模型参数

Table 2. Calculate model parameters

材料	弹性模量/MPa	泊松比	密度/（kg·m⁻³）	黏聚力/kPa	内摩擦角/（°）
土体	27	0.35	2000	0	35
管道	43.6	0.25	2700

下载: 导出CSV

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